 
  
OPA340
OPA2340
OPA4340
1
FEATURES DESCRIPTION
APPLICATIONS
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
OutD
-InD
+InD
V-
+InC
-InC
OutC
NC(1)
OutA
-InA
+InA
V+
+InB
-InB
OutB
NC(1)
OPA4340
A D
B C
1
2
3
5
4
V+
-In
Out
V-
+In
OPA340
SOT23-5
1
2
3
4
8
7
6
5
V+
OutB
-InB
+InB
OutA
-InA
+InA
V-
OPA2340
DIP-8,SO-8,MSOP-8
A
B
1
2
3
4
8
7
6
5
NC(1)
V+
Output
NC(1)
NC(1)
-In
+In
V-
OPA340
DIP-8,SO-8
SSOP-16
1
2
3
4
5
6
7
14
13
12
11
10
9
8
OutD
-InD
+InD
V-
+InC
-InC
OutC
OutA
-InA
+InA
V+
+InB
-InB
OutB
OPA4340
A D
B C
NOTE:(1)NCdenotesnointernalconnection. SO-14
OPA340
OPA2340
OPA4340SBOS073B – SEPTEMBER 1997 – REVISED NOVEMBER 2007
SINGLE-SUPPLY, RAIL-TO-RAILOPERATIONAL AMPLIFIERSMicroAmplifier™ Series
23
•RAIL-TO-RAIL INPUT
OPA340 series rail-to-rail CMOS operationalamplifiers are optimized for low-voltage, single-supply•RAIL-TO-RAIL OUTPUT (within 1mV)
operation. Rail-to-rail input/output and high-speed•MicroSIZE PACKAGES
operation make them ideal for driving sampling•WIDE BANDWIDTH: 5.5MHz
analog-to-digital (A/D) converters. They are also•HIGH SLEW RATE: 6V/ µswell-suited for general purpose and audioapplications as well as providing I/V conversion at the•LOW THD+NOISE: 0.0007% (f = 1kHz)
output of digital-to-analog (D/A) converters. Single,•LOW QUIESCENT CURRENT: 750 µA/channel
dual, and quad versions have identical specifications•SINGLE, DUAL, AND QUAD VERSIONS
for design flexibility.
The OPA340 series operate on a single supply as lowas 2.5V with an input common-mode voltage range•DRIVING A/D CONVERTERS
that extends 500mV below ground and 500mV above•PCMCIA CARDS the positive supply. Output voltage swing is to within1mV of the supply rails with a 100k Ωload. They offer•DATA ACQUISITION
excellent dynamic response (BW = 5.5MHz, SR =•PROCESS CONTROL
6V/ µs), yet quiescent current is only 750 µA. Dual and•AUDIO PROCESSING
quad designs feature completely independent•COMMUNICATIONS
circuitry for lowest crosstalk and freedom frominteraction.•ACTIVE FILTERS•TEST EQUIPMENT
The single (OPA340) packages are the tiny 5-leadSOT23-5 surface mount, SO-8 surface mount, andDIP-8. The dual (OPA2340) comes in the miniatureMSOP-8 surface mount, SO-8 surface mount, andDIP-8 packages. The quad (OPA4340) packages arethe space-saving SSOP-16 surface mount and SO-14surface mount. All are specified from – 40 °C to +85Cand operate from – 55 °C to +125 °C. A SPICEmacromodel is available for design analysis.
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications ofTexas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2MicroAmplifier is a trademark of Texas Instruments, Inc.3All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 1997 – 2007, Texas Instruments IncorporatedProducts conform to specifications per the terms of the TexasInstruments standard warranty. Production processing does notnecessarily include testing of all parameters.
www.ti.com
ABSOLUTE MAXIMUM RATINGS
(1)
OPA340
OPA2340
OPA4340
SBOS073B – SEPTEMBER 1997 – REVISED NOVEMBER 2007
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled withappropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be moresusceptible to damage because very small parametric changes could cause the device not to meet its published specifications.
VALUE UNIT
Supply Voltage 5.5 V
Signal Input Terminals
Voltage
(2)
(V – ) – 0.5 to (V+) + 0.5 V
Current
(2)
10 mA
Output Short-Circuit
(3)
Continuous
Operating Temperature – 55 to +125 °C
Storage Temperature – 55 to +125 °C
Junction Temperature +150 °C
(1) Stresses above these ratings may cause permanent damage. Exposure to absolute maximum conditions for extended periods maydegrade device reliability. These are stress ratings only, and functional operation of the device at these or any other conditions beyondthose specified is not implied.(2) Input terminals are diode-clamped to the power-supply rails. Input signals that can swing more than 0.5V beyond the supply rails shouldbe current limited to 10mA or less.(3) Short-circuit to ground, one amplifier per package.
PACKAGE/ORDERING INFORMATION
(1)
SPECIFIEDPACKAGE TEMPERATURE PACKAGE ORDERING TRANSPORT MEDIA,PRODUCT PACKAGE-LEAD DESIGNATOR RANGE MARKING NUMBER
(2)
QUANTITY
Single
OPA340NA/250OPA340NA 5-Lead SOT-23-5 DBV – 40 °C to +85 °C A40 Tape and ReelOPA340NA/3K
OPA340PA 8-Pin DIP P – 40 °C to +85 °C OPA340PA OPA340PA Rails
OPA340UAOPA340UA SO-8 Surface-Mount D – 40 °C to +85 °C OPA340UA Rails
(3)OPA340UA/2K5
Dual
OPA2340EA/250OPA2340EA MSOP-8 Surface-Mount DGK – 40 °C to +85 °C A40A Tape and ReelOPA2340EA/2K5
OPA2340PA 8-Pin DIP P – 40°C to +85°C OPA2340PA OPA2340PA Rails
OPA2340UA SO-8 Surface-Mount D – 40°C to +85°C OPA2340UA OPA2340UA Rails
(3)
Quad
OPA4340EA/250OPA4340EA SSOP-16 Surface-Mount DBQ – 40°C to +85°C OPA4340EA Tape and ReelOPA4340EA/2K5
OPA4340UAOPA4340UA SO-14 Surface Mount D – 40°C to +85°C OPA4340UA Rails
(3)OPA4340UA/2K5
(1) For the most current package and ordering information see the Package Option Addendum at the end of this document, or see the TIweb site at www.ti.com .(2) Models with /250, /2500, and /3K are available only in tape and reel in the quantities indicated (e.g., /250 indicates 250 devices perreel). Ordering 3000 pieces of OPA340NA/3K will get a single 3000 piece tape and reel.(3) SO-8 and SO-14 models also available in tape and reel.
2Submit Documentation Feedback Copyright © 1997 – 2007, Texas Instruments Incorporated
Product Folder Link(s): OPA340 OPA2340 OPA4340
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ELECTRICAL CHARACTERISTICS: V
S
= 2.7V to 5V
OPA340
OPA2340
OPA4340
SBOS073B – SEPTEMBER 1997 – REVISED NOVEMBER 2007
BOLDFACE limits apply over the specified temperature range, T
A
= – 40 °C to +85 °C. V
S
= 5V.At T
A
= +25 °C, R
L
= 10k Ωconnected to V
S
/2, and V
OUT
= V
S
/2, unless otherwise noted.
OPA340NA, PA, UAOPA2340EA, PA, UAOPA4340EA, UA
PARAMETER CONDITIONS MIN TYP
(1)
MAX UNIT
OFFSET VOLTAGE
Input Offset Voltage V
OS
V
S
= 5V ± 150 ± 500 µV
vs Temperature dV
OS
/dT ± 2.5 µV/ °C
vs Power Supply PSRR V
S
= 2.7V to 5.5V, V
CM
= 0V 30 120 µV/V
Over Temperature V
S
= 2.7V to 5.5V, V
CM
= 0V 120 µV/V
Channel Separation, dc 0.2 µV/V
INPUT BIAS CURRENT
Input Bias Current I
B
± 0.2 ± 10 pA
Over Temperature ± 60 pA
Input Offset Current I
OS
± 0.2 ± 10 pA
NOISE
Input Voltage Noise, f = 0.1kHz to 50kHz 8 µVrms
Input Voltage Noise Density, f = 1kHz e
n
25 nV/ √Hz
Current Noise Density, f = 1kHz i
n
3 fA/ √Hz
INPUT VOLTAGE RANGE
Common-Mode Voltage Range V
CM
– 0.3 (V+) + 0.3 V
Common-Mode Rejection Ratio CMRR – 0.3V < V
CM
< (V+) – 1.8V 80 92 dB
V
S
= 5V, – 0.3V < V
CM
< 5.3V 70 84 dB
V
S
= 2.7V, – 0.3V < V
CM
< 3V 66 80 dB
INPUT IMPEDANCE
Differential ΩpF10
13
3
Common-Mode ΩpF10
13
6
OPEN-LOOP GAIN
Open-Loop Voltage Gain A
OL
R
L
= 100k Ω, 5mV < V
O
< (V+) – 5mV 106 124 dB
Over Temperature R
L
= 100k Ω, 5mV < V
O
< (V+) – 5mV 106 dB
R
L
= 10k Ω, 5mV < V
O
< (V+) – 50mV 100 120 dB
Over Temperature R
L
= 10k Ω, 5mV < V
O
< (V+) – 50mV 100 dB
R
L
= 2k Ω, 200mV < V
O
< (V+) – 200mV 94 114 dB
Over Temperature R
L
= 2k Ω, 200mV < V
O
< (V+) – 200mV 94 dB
FREQUENCY RESPONSE
Gain-Bandwidth Product GBW G = 1 5.5 MHz
Slew Rate SR V
S
= 5V, G = 1, C
L
= 100pF 6 V/ µs
Settling Time, 0.1% V
S
= 5V, 2V Step, C
L
= 100pF 1 µs
Settling Time, 0.01% V
S
= 5V, 2V Step, C
L
= 100pF 1.6 µs
Overload Recovery Time V
IN
• G = V
S
0.2 µs
Total Harmonic Distortion + Noise THD+N V
S
= 5V, V
O
= 3V
PP
(2)
, G = 1, f = 1kHz 0.0007 %
(1) V
S
= +5V.(2) V
OUT
= 0.25V to 3.25V.
Copyright © 1997 – 2007, Texas Instruments Incorporated Submit Documentation Feedback 3
Product Folder Link(s): OPA340 OPA2340 OPA4340
www.ti.com
OPA340
OPA2340
OPA4340
SBOS073B – SEPTEMBER 1997 – REVISED NOVEMBER 2007
ELECTRICAL CHARACTERISTICS: V
S
= 2.7V to 5V (continued)BOLDFACE limits apply over the specified temperature range, T
A
= – 40 °C to +85 °C. V
S
= 5V.At T
A
= +25 °C, R
L
= 10k Ωconnected to V
S
/2, and V
OUT
= V
S
/2, unless otherwise noted.
OPA340NA, PA, UAOPA2340EA, PA, UAOPA4340EA, UA
PARAMETER CONDITIONS MIN TYP
(1)
MAX UNIT
OUTPUT
(3)
Voltage Output Swing from Rail
(4)
R
L
= 100k Ω, A
OL
≥106dB 1 5 mV
Over Temperature R
L
= 100k Ω, A
OL
≥106dB 5 mV
R
L
= 10k Ω, A
OL
≥100dB 10 50 mV
Over Temperature R
L
= 10k Ω, A
OL
≥100dB 50 mV
R
L
= 2k Ω, A
OL
≥94dB 40 200 mV
Over Temperature R
L
= 2k Ω, A
OL
≥94dB 200 mV
Short-Circuit Current I
SC
± 50 mA
Capacitive Load Drive C
LOAD
See Typical Characteristics
POWER SUPPLY
Specified Voltage Range V
S
2.7 5 V
Operating Voltage Range 2.5 to 5.5 V
Quiescent Current (per amplifier) I
Q
I
O
= 0, V
S
= +5V 750 950 µA
Over Temperature I
O
= 0, V
S
= +5V 1100 µA
TEMPERATURE RANGE
Specified Range – 40 +85 °C
Operating Range – 55 +125 °C
Storage Range – 55 +125 °C
Thermal Resistance Θ
JA
SOT23-5 Surface Mount 200 °C/W
MSOP-8 Surface Mount 150 °C/W
SO-8 Surface Mount 150 °C/W
DIP-8 Surface Mount 100 °C/W
SSOP-16 Surface Mount 100 °C/W
SO-14 Surface Mount 100 °C/W
(3) V
S
= +5V.(4) Output voltage swings are measured between the output and power supply rails.
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Product Folder Link(s): OPA340 OPA2340 OPA4340
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TYPICAL CHARACTERISTICS
0.1 1
160
140
120
100
80
60
40
20
0
-20
VoltageGain(dB)
0
-45
-90
-135
-180
Phase( )°
Frequency(Hz)
10 100 1k 10k 100k 1M 10M
100
80
60
40
20
0
PSRR,CMRR(dB)
Frequency(Hz)
1 10 100 1k 10k 100k 1M
PSRR
CMRR
Frequency(Hz)
ChannelSeparation(dB)
140
130
120
110
100
10010 1k 10k 100k
G=1,AllChannels
10k
1k
100
10
1
1k
100
10
1
0.1
VoltageNoise(nV/ )ÖHz
Frequency(Hz)
1 10 100 1k 10k 100k 1M
CurrentNoise(fA/ )ÖHz
CurrentNoise
VoltageNoise
5k
4k
3k
2k
1k
0
OutputResistance( )W
Frequency(Hz)
10 100 1k 10k 100k 1M 10M
G=100
G=10
G=1
OPA340
OPA2340
OPA4340
SBOS073B – SEPTEMBER 1997 – REVISED NOVEMBER 2007
At T
A
= +25 °C, V
S
= +5V, and R
L
= 10k Ωconnected to V
S
/2, unless otherwise noted.
OPEN-LOOP GAIN/PHASE POWER-SUPPLY AND COMMON-MODE REJECTIONvs FREQUENCY vs FREQUENCY
Figure 1. Figure 2.
INPUT VOLTAGE AND CURRENT NOISESPECTRAL DENSITY vs FREQUENCY CHANNEL SEPARATION vs FREQUENCY
Figure 3. Figure 4.
TOTAL HARMONIC DISTORTION + NOISE CLOSED-LOOP OUTPUT IMPEDANCEvs FREQUENCY vs FREQUENCY
Figure 5. Figure 6.
Copyright © 1997 – 2007, Texas Instruments Incorporated Submit Documentation Feedback 5
Product Folder Link(s): OPA340 OPA2340 OPA4340
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130
120
110
100
90
80
A,PSRR(dB)
OL
Temperature( C)°
-75 -50 -25 0 25 50 75 100 125
R =100kW
L
R =10kW
L
R =2kW
L
AOL
PSRR
100
90
80
70
60
50
40
CMRR(dB)
Temperature( C)°
-75 -50 -25 0 25 50 75 100 125
V =5V,V = -0.3Vto5.3V
S CM
V =2.7V,V = -0.3Vto3V
S CM
V =2.7Vto5V,V = -0.3Vto(V+) 1.8V-
S CM
SupplyVoltage(V)
QuiescentCurrent( A)m
800
750
700
650
600
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
PerAmplifier
1000
900
800
700
600
500
QuiescentCurrent( A)m
Temperature( C)°
-75 -50 -25 0 25 50 75 100 125
PerAmplifier
Temperature( C)°
Short-CircuitCurrent(mA)
100
90
80
70
60
50
40
30
20
10
0
-75 -50 -25 0 25 50 75 100 125
-ISC
+ISC
SupplyVoltage(V)
Short-CircuitCurrent(mA)
60
50
40
30
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
+ISC
-ISC
OPA340
OPA2340
OPA4340
SBOS073B – SEPTEMBER 1997 – REVISED NOVEMBER 2007
TYPICAL CHARACTERISTICS (continued)At T
A
= +25 °C, V
S
= +5V, and R
L
= 10k Ωconnected to V
S
/2, unless otherwise noted.
OPEN-LOOP GAIN AND POWER-SUPPLYREJECTION vs TEMPERATURE COMMON-MODE REJECTION vs TEMPERATURE
Figure 7. Figure 8.
QUIESCENT CURRENT vs TEMPERATURE QUIESCENT CURRENT vs SUPPLY VOLTAGE
Figure 9. Figure 10.
SHORT-CIRCUIT CURRENT vs TEMPERATURE SHORT-CIRCUIT CURRENT vs SUPPLY VOLTAGE
Figure 11. Figure 12.
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Product Folder Link(s): OPA340 OPA2340 OPA4340
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-75 -50 -25 0 25 50 75 100 125
1k
100
10
1
0.1
InputBiasCurrent(pA)
Temperature( C)°
Common-ModeVoltage(V)
InputBiasCurrent(pA)
1.0
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0
-1 0 1 2 3 4 5 6
OutputCurrent(mA)
OutputVoltage(V)
5
4
3
2
1
0
0±10
+125 C°+25 C° -55 C°
+125 C°+25 C°-55 C°
±20 ±30 ±40 ±50 ±60 ±70 ±80 ±90 ±100
10M1M
Frequency(Hz)
100k
6
5
4
3
2
1
0
OutputVoltage(V )
PP
V =5.5V
S
V =2.7V
S
Maximumoutput
voltagewithout
slewrate-induced
distortion.
PercentofAmplifiers(%)
OffsetVoltageDrift( V/ C)m °
25
20
15
10
5
0
Typicalproduction
distributionof
packagedunits.
0 1 2 3 4 5 6 7 8 9 10 11 12 13 15
PercentofAmplifiers(%)
OffsetVoltage( V)m
18
16
14
12
10
8
6
4
2
0
Typicalproduction
distributionof
packagedunits.
-500
-400
-300
-200
-100
0
100
200
300
400
500
OPA340
OPA2340
OPA4340
SBOS073B – SEPTEMBER 1997 – REVISED NOVEMBER 2007
TYPICAL CHARACTERISTICS (continued)At T
A
= +25 °C, V
S
= +5V, and R
L
= 10k Ωconnected to V
S
/2, unless otherwise noted.
INPUT BIAS CURRENTINPUT BIAS CURRENT vs TEMPERATURE vs INPUT COMMON-MODE VOLTAGE
Figure 13. Figure 14.
OUTPUT VOLTAGE SWING vs OUTPUT CURRENT MAXIMUM OUTPUT VOLTAGE vs FREQUENCY
Figure 15. Figure 16.
OFFSET VOLTAGE OFFSET VOLTAGE DRIFT MAGNITUDEPRODUCTION DISTRIBUTION PRODUCTION DISTRIBUTION
Figure 17. Figure 18.
Copyright © 1997 – 2007, Texas Instruments Incorporated Submit Documentation Feedback 7
Product Folder Link(s): OPA340 OPA2340 OPA4340
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50mV/div
1ms/div
1V/div
1ms/div
10k1000
LoadCapacitance(pF)
100
60
50
40
30
20
10
0
Overshoot(%)
G=+1
G= 1-
G= 5-
Seetextfor
reducingovershoot.
G=+5
100
10
1
0.1
SettlingTime( s)m
Closed-LoopGain(V/V)
1 10 100 1000
0.1%
0.01%
OPA340
OPA2340
OPA4340
SBOS073B – SEPTEMBER 1997 – REVISED NOVEMBER 2007
TYPICAL CHARACTERISTICS (continued)At T
A
= +25 °C, V
S
= +5V, and R
L
= 10k Ωconnected to V
S
/2, unless otherwise noted.
SMALL-SIGNAL STEP RESPONSE LARGE-SIGNAL STEP RESPONSEC
L
= 100pF C
L
= 100pF
Figure 19. Figure 20.
SMALL-SIGNAL OVERSHOOTvs LOAD CAPACITANCE SETTLING TIME vs CLOSED-LOOP GAIN
Figure 21. Figure 22.
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APPLICATIONS INFORMATION
RAIL-TO-RAIL INPUT
V =+5,G=+1,R =10kW
S L
5
5
0
VIN
VOUT
2V/div
OPERATING VOLTAGE
OPA340
OPA2340
OPA4340
SBOS073B – SEPTEMBER 1997 – REVISED NOVEMBER 2007
from – 40 °C to +85 °C. Most behavior remains virtuallyOPA340 series op amps are fabricated on a
unchanged throughout the full operating voltagestate-of-the-art, 0.6 micron CMOS process. They are
range. Parameters which vary significantly withunity-gain stable and suitable for a wide range of
operating voltages or temperature are shown in thegeneral-purpose applications. Rail-to-rail input/output
Typical Characteristics .make them ideal for driving sampling A/D converters.In addition, excellent ac performance makes themwell-suited for audio applications. The class ABoutput stage is capable of driving 600 Ωloads The input common-mode voltage range of theconnected to any point between V+ and ground. OPA340 series extends 500mV beyond the supplyrails. This is achieved with a complementary inputRail-to-rail input and output swing significantly
stage — an N-channel input differential pair in parallelincreases dynamic range, especially in low-supply
with a P-channel differential pair (as shown inapplications. Figure 23 shows the input and output
Figure 24 ). The N-channel pair is active for inputwaveforms for the OPA340 in unity-gain
voltages close to the positive rail, typicallyconfiguration. Operation is from a single +5V supply
(V+) – 1.3V to 500mV above the positive supply,with a 10k Ωload connected to V
S
/2. The input is a
while the P-channel pair is on for inputs from 500mV5V
PP
sinusoid. Output voltage is approximately
below the negative supply to approximately4.98V
PP
.
(V+) – 1.3V. There is a small transition region,typically (V+) – 1.5V to (V+) – 1.1V, in which bothPower-supply pins should be bypassed with 0.01 µF
pairs are on. This 400mV transition region can varyceramic capacitors.
± 300mV with process variation. Thus, the transitionregion (both stages on) can range from (V+) – 1.8V to(V+) – 1.4V on the low end, up to (V+) – 1.2V to (V+)– 0.8V on the high end.
OPA340 series op amps are laser-trimmed to thereduce offset voltage difference between theN-channel and P-channel input stages, resulting inimproved common-mode rejection and a smoothtransition between the N-channel pair and theP-channel pair. However, within the 400mV transitionregion PSRR, CMRR, offset voltage, offset drift, andTHD may be degraded compared to operationoutside this region.
A double-folded cascode adds the signal from the twoinput pairs and presents a differential signal to theFigure 23. Rail-to-Rail Input and Output
class AB output stage. Normally, input bias current isapproximately 200fA; however, input voltagesexceeding the power supplies by more than 500mVcan cause excessive current to flow in or out of theOPA340 series op amps are fully specified from
input pins. Momentary voltages greater than 500mV+2.7V to +5V. However, supply voltage may range
beyond the power supply can be tolerated if thefrom +2.5V to +5.5V. Parameters are ensured over
current on the input pins is limited to 10mA. This isthe specified supply range — a unique feature of the
easily accomplished with an input resistor, as shownOPA340 series. In addition, many specifications apply
in Figure 25 . Many input signals are inherentlycurrent-limited to less than 10mA; therefore, a limitingresistor is not required.
Copyright © 1997 – 2007, Texas Instruments Incorporated Submit Documentation Feedback 9
Product Folder Link(s): OPA340 OPA2340 OPA4340
www.ti.com
VBIAS1
VBIAS2
V +
IN V-
IN
ClassAB
Control
Circuitry
VO
V-
(Ground)
V+
Reference
Current
5kW
OPAx340
10mAmax
V+
VIN
VOUT
IOVERLOAD
RAIL-TO-RAIL OUTPUT CAPACITIVE LOAD AND STABILITY
OPA340
OPA2340
OPA4340
SBOS073B – SEPTEMBER 1997 – REVISED NOVEMBER 2007
Figure 24. Simplified Schematic
Figure 25. Input Current Protection for Voltages Exceeding the Supply Voltage
A class AB output stage with common-source OPA340 series op amps can drive a wide range oftransistors is used to achieve rail-to-rail output. For capacitive loads. However, all op amps under certainlight resistive loads (> 50k Ω), the output voltage is conditions may become unstable. Op amptypically a few millivolts from the supply rails. With configuration, gain, and load value are just a few ofmoderate resistive loads (2k Ωto 50k Ω), the output the factors to consider when determining stability. Ancan swing to within a few tens of millivolts from the op amp in unity gain configuration is most susceptiblesupply rails and maintain high open-loop gain. See to the effects of capacitive load. The capacitive loadthe typical characteristic curve Output Voltage Swing reacts with the op amp ’ s output resistance, along withvs Output Current. any additional load resistance, to create a pole in thesmall-signal response which degrades the phasemargin. In unity gain, OPA340 series op ampsperform well, with a pure capacitive load up toapproximately 1000pF. Increasing gain enhances theamplifier ’ s ability to drive more capacitance. See thetypical performance curve Small-Signal Overshoot vsCapacitive Load.
10 Submit Documentation Feedback Copyright © 1997 – 2007, Texas Instruments Incorporated
Product Folder Link(s): OPA340 OPA2340 OPA4340
www.ti.com
DRIVING A/D CONVERTERS
10 toW
20W
OPAx340
V+
VIN
VOUT
RS
RLCL
ADS7816
12-BitA/D
DCLOCK
DOUT
CS/SHDN
OPA340
+5V
VIN
V+
2
+In
3
-In
VREF
8
4GND
Serial
Interface
1
0.1mF 0.1mF
7
6
5
NOTE:A/DInput=0toVREF
V =0Vto5Vfor
IN
0Vto5Voutput.
RCnetworkfiltershighfrequencynoise.
500W
3300pF
OPA340
OPA2340
OPA4340
SBOS073B – SEPTEMBER 1997 – REVISED NOVEMBER 2007
One method of improving capacitive load drive in theunity gain configuration is to insert a 10 Ωto 20 Ω
OPA340 series op amps are optimized for drivingresistor in series with the output, as shown in
medium speed (up to 100kHz) sampling A/DFigure 26 . This significantly reduces ringing with large
converters. However, they also offer excellentcapacitive loads. However, if there is a resistive load
performance for higher speed converters. Thein parallel with the capacitive load, it creates a
OPA340 series provides an effective means ofvoltage divider introducing a dc error at the output
buffering the A/D ’ s input capacitance and resultingand slightly reduces output swing. This error may be
charge injection while providing signal gain. Figure 27insignificant. For instance, with R
L
= 10k Ωand R
S
=
and Figure 28 show the OPA340 driving an20 Ω, there is only about a 0.2% error at the output.
ADS7816 . The ADS7816 is a 12-bit, micro-powersampling converter in the tiny MSOP-8 package.When used with the miniature package options of theOPA340 series, the combination is ideal forspace-limited and low-power applications. For furtherinformation consult the ADS7816 data sheet . With theOPA340 in a noninverting configuration, an RCnetwork at the amplifier ’ s output can be used to filterhigh-frequency noise in the signal (see Figure 27 ). Inthe inverting configuration, filtering may beaccomplished with a capacitor across the feedbackFigure 26. Series Resistor in Unity-Gain
resistor (see Figure 28 ).Configuration Improves Capacitive Load Drive
Figure 27. OPA340 in Noninverting Configuration Driving ADS7816
Copyright © 1997 – 2007, Texas Instruments Incorporated Submit Documentation Feedback 11
Product Folder Link(s): OPA340 OPA2340 OPA4340
www.ti.com
ADS7816
12-BitA/D
DCLOCK
DOUT
CS/SHDN
OPA340
+5V
VIN V+
2
+In
3
-In
VREF
8
4GND
Serial
Interface
1
0.1mF 0.1mF
7
6
5
NOTE:A/DInput=0toVREF
5kW5kW
330pF
V =0Vto -5Vfor0Vto5Voutput.
IN
243kW
10MW
10MW
1.74MW
220pF
47pF
200pF
1/2
OPA2340
+5V
VIN
RL
1/2
OPA2340
Filters160Hzto2.4kHz
OPA340
OPA2340
OPA4340
SBOS073B – SEPTEMBER 1997 – REVISED NOVEMBER 2007
Figure 28. OPA340 in Inverting Configuration Driving ADS7816
Figure 29. Speech Bandpass Filter
12 Submit Documentation Feedback Copyright © 1997 – 2007, Texas Instruments Incorporated
Product Folder Link(s): OPA340 OPA2340 OPA4340
PACKAGE OPTION ADDENDUM
www.ti.com 16-Aug-2012
Addendum-Page 1
PACKAGING INFORMATION
Orderable Device Status (1) Package Type Package
Drawing Pins Package Qty Eco Plan (2) Lead/
Ball Finish MSL Peak Temp (3) Samples
(Requires Login)
OPA2340EA/250 ACTIVE VSSOP DGK 8 250 Green (RoHS
& no Sb/Br) CU NIPDAUAGLevel-2-260C-1 YEAR
OPA2340EA/250G4 ACTIVE VSSOP DGK 8 250 Green (RoHS
& no Sb/Br) CU NIPDAUAGLevel-2-260C-1 YEAR
OPA2340EA/2K5 ACTIVE VSSOP DGK 8 2500 Green (RoHS
& no Sb/Br) CU NIPDAUAGLevel-2-260C-1 YEAR
OPA2340EA/2K5G4 ACTIVE VSSOP DGK 8 2500 Green (RoHS
& no Sb/Br) CU NIPDAUAGLevel-2-260C-1 YEAR
OPA2340PA ACTIVE PDIP P 8 50 Green (RoHS
& no Sb/Br) CU NIPDAU N / A for Pkg Type
OPA2340PAG4 ACTIVE PDIP P 8 50 Green (RoHS
& no Sb/Br) CU NIPDAU N / A for Pkg Type
OPA2340UA ACTIVE SOIC D 8 75 Green (RoHS
& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR
OPA2340UA/2K5 ACTIVE SOIC D 8 2500 Green (RoHS
& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR
OPA2340UA/2K5G4 ACTIVE SOIC D 8 2500 Green (RoHS
& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR
OPA2340UAG4 ACTIVE SOIC D 8 75 Green (RoHS
& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR
OPA340NA/250 ACTIVE SOT-23 DBV 5 250 Green (RoHS
& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR
OPA340NA/250G4 ACTIVE SOT-23 DBV 5 250 Green (RoHS
& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR
OPA340NA/3K ACTIVE SOT-23 DBV 5 3000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR
OPA340NA/3KG4 ACTIVE SOT-23 DBV 5 3000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR
OPA340PA ACTIVE PDIP P 8 50 Green (RoHS
& no Sb/Br) CU NIPDAU N / A for Pkg Type
OPA340PAG4 ACTIVE PDIP P 8 50 Green (RoHS
& no Sb/Br) CU NIPDAU N / A for Pkg Type
OPA340UA ACTIVE SOIC D 8 75 Green (RoHS
& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR
PACKAGE OPTION ADDENDUM
www.ti.com 16-Aug-2012
Addendum-Page 2
Orderable Device Status (1) Package Type Package
Drawing Pins Package Qty Eco Plan (2) Lead/
Ball Finish MSL Peak Temp (3) Samples
(Requires Login)
OPA340UA/2K5 ACTIVE SOIC D 8 2500 Green (RoHS
& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR
OPA340UA/2K5G4 ACTIVE SOIC D 8 2500 Green (RoHS
& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR
OPA340UAG4 ACTIVE SOIC D 8 75 Green (RoHS
& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR
OPA4340EA/250 ACTIVE SSOP DBQ 16 250 Green (RoHS
& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR
OPA4340EA/250G4 ACTIVE SSOP DBQ 16 250 Green (RoHS
& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR
OPA4340EA/2K5 ACTIVE SSOP DBQ 16 2500 Green (RoHS
& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR
OPA4340EA/2K5G4 ACTIVE SSOP DBQ 16 2500 Green (RoHS
& no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR
OPA4340PA OBSOLETE PDIP N 14 TBD Call TI Call TI
OPA4340UA ACTIVE SOIC D 14 50 Green (RoHS
& no Sb/Br) CU NIPDAU Level-3-260C-168 HR
OPA4340UA/2K5 ACTIVE SOIC D 14 2500 Green (RoHS
& no Sb/Br) CU NIPDAU Level-3-260C-168 HR
OPA4340UA/2K5G4 ACTIVE SOIC D 14 2500 Green (RoHS
& no Sb/Br) CU NIPDAU Level-3-260C-168 HR
OPA4340UAG4 ACTIVE SOIC D 14 50 Green (RoHS
& no Sb/Br) CU NIPDAU Level-3-260C-168 HR
(1) The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability
information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that
lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between
the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.
PACKAGE OPTION ADDENDUM
www.ti.com 16-Aug-2012
Addendum-Page 3
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight
in homogeneous material)
(3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
OTHER QUALIFIED VERSIONS OF OPA340 :
•Enhanced Product: OPA340-EP
NOTE: Qualified Version Definitions:
•Enhanced Product - Supports Defense, Aerospace and Medical Applications
TAPE AND REEL INFORMATION
*All dimensions are nominal
Device Package
Type Package
Drawing Pins SPQ Reel
Diameter
(mm)
Reel
Width
W1 (mm)
A0
(mm) B0
(mm) K0
(mm) P1
(mm) W
(mm) Pin1
Quadrant
OPA2340EA/250 VSSOP DGK 8 250 330.0 12.4 5.3 3.4 1.4 8.0 12.0 Q1
OPA2340EA/2K5 VSSOP DGK 8 2500 330.0 12.4 5.3 3.4 1.4 8.0 12.0 Q1
OPA2340UA/2K5 SOIC D 8 2500 330.0 12.4 6.4 5.2 2.1 8.0 12.0 Q1
OPA340NA/250 SOT-23 DBV 5 250 178.0 9.0 3.23 3.17 1.37 4.0 8.0 Q3
OPA340NA/3K SOT-23 DBV 5 3000 179.0 8.4 3.2 3.2 1.4 4.0 8.0 Q3
OPA340NA/3K SOT-23 DBV 5 3000 178.0 9.0 3.23 3.17 1.37 4.0 8.0 Q3
OPA340UA/2K5 SOIC D 8 2500 330.0 12.4 6.4 5.2 2.1 8.0 12.0 Q1
OPA4340EA/250 SSOP DBQ 16 250 180.0 12.4 6.4 5.2 2.1 8.0 12.0 Q1
OPA4340EA/2K5 SSOP DBQ 16 2500 330.0 12.4 6.4 5.2 2.1 8.0 12.0 Q1
OPA4340UA/2K5 SOIC D 14 2500 330.0 16.4 6.5 9.0 2.1 8.0 16.0 Q1
PACKAGE MATERIALS INFORMATION
www.ti.com 16-Aug-2012
Pack Materials-Page 1
*All dimensions are nominal
Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm)
OPA2340EA/250 VSSOP DGK 8 250 366.0 364.0 50.0
OPA2340EA/2K5 VSSOP DGK 8 2500 366.0 364.0 50.0
OPA2340UA/2K5 SOIC D 8 2500 367.0 367.0 35.0
OPA340NA/250 SOT-23 DBV 5 250 180.0 180.0 18.0
OPA340NA/3K SOT-23 DBV 5 3000 195.0 200.0 45.0
OPA340NA/3K SOT-23 DBV 5 3000 180.0 180.0 18.0
OPA340UA/2K5 SOIC D 8 2500 367.0 367.0 35.0
OPA4340EA/250 SSOP DBQ 16 250 210.0 185.0 35.0
OPA4340EA/2K5 SSOP DBQ 16 2500 367.0 367.0 35.0
OPA4340UA/2K5 SOIC D 14 2500 367.0 367.0 38.0
PACKAGE MATERIALS INFORMATION
www.ti.com 16-Aug-2012
Pack Materials-Page 2
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