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
Out A
In A
+In A
+V
+In B
In B
Out B
NC
OPA4343
SSOP-16
A
D
B
C
1
2
3
4
8
7
6
5
V+
Out B
In B
+In B
Out A
In A
+In A
V
OPA2343
SO-8, MSOP-8
A
B
1
2
3
4
8
7
6
5
NC
V+
Output
NC
NC
In
+In
V
OPA343
SO-8
1
2
3
5
4
V+
In
Out
V
+In
OPA343
SOT-23-5
SINGLE-SUPPLY, RAIL-TO-RAIL
OPERATIONAL AMPLIFIERS
micro
Amplifier
TM
Series
Copyright 2000, Texas Instruments Incorporated
SBOS090A
Printed in U.S.A. October, 2000
OPA
4343
OPA2
343
OPA4343
OPA343
OPA2343
OPA4343
FEATURES
q
RAIL-TO-RAIL INPUT/OUTPUT
q
MICRO
SIZE PACKAGES
q
WIDE BANDWIDTH: 5.5MHz
q
HIGH SLEW RATE: 6V/
s
q
LOW THD+NOISE: 0.0007% (f = 1kHz)
q
LOW QUIESCENT CURRENT: 850
A/chan
q
SINGLE, DUAL, AND QUAD VERSIONS
APPLICATIONS
q
DRIVING A/D CONVERTERS
q
PCMCIA CARDS
q
DATA ACQUISITION
q
AUDIO PROCESSING
q
COMMUNICATIONS
q
ACTIVE FILTERS
q
TEST EQUIPMENT
DESCRIPTION
OPA343 series rail-to-rail CMOS operational amplifiers
are designed for low-cost, miniature applications. They
are optimized for low-voltage, single-supply operation.
Rail-to-rail input/output and high-speed operation make
them ideal for driving sampling Analog-to-Digital (A/D)
converters. They are also well suited for general-purpose
and audio applications as well as providing I/V conver-
sion at the output of Digital-to-Analog (D/A) converters.
Single, dual, and quad versions have identical specifica-
tions for design flexibility.
The OPA343 series operates on a single supply as low as
2.5V, and input common-mode voltage range extends
500mV beyond the supply rails. Output voltage swings to
within 1mV of the supply rails with a 100k
load. They
offer excellent dynamic response (BW = 5.5MHz,
SR = 6V/
s), yet quiescent current is only 850
A. Dual
and quad designs feature completely independent circuitry
for lowest crosstalk and freedom from interaction.
The single (OPA343) packages are the tiny SOT-23-5
surface mount and SO-8 surface mount. The dual
(OPA2343) comes in the miniature MSOP-8 surface
mount and SO-8 surface mount. The quad (OPA4343)
packages are the space-saving SSOP-16 surface mount,
SO-14 surface mount, and TSSOP-14 surface mount. All
are specified from 40
C to +85
C and operate from
55
C to +125
C. A SPICE macromodel is available for
design analysis.
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
OPA4343
A
D
B
C
TSSOP-14
www.ti.com
OPA343, 2343, 4343
2
SBOS090A
PARAMETER
CONDITION
MIN
TYP
(1)
MAX
UNITS
OFFSET VOLTAGE
Input Offset Voltage
V
OS
V
S
= 5V
2
8
mV
vs Temperature
dV
OS
/dT
3
V/
C
vs Power Supply
PSRR
V
S
= 2.7V to 5.5V, V
CM
= 0V
40
200
V/V
Over Temperature
V
S
= 2.7V to 5.5V, V
CM
= 0V
200
V/V
Channel Separation, dc
0.2
V/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 = 0.1 to 50kHz
8
Vrms
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
74
92
dB
V
S
= 5V, 0.3V
< V
CM
< 5.3V
60
75
dB
V
S
= 2.7V, 0.3V
< V
CM
< 3V
54
70
dB
INPUT IMPEDANCE
Differential
10
13
|| 3
|| pF
Common-Mode
10
13
|| 6
|| pF
OPEN-LOOP GAIN
Open-Loop Voltage Gain
A
OL
R
L
= 100k
, 5mV < V
O
< (V+) 5mV
100
120
dB
Over Temperature
R
L
= 100k
, 5mV < V
O
< (V+) 5mV
100
dB
R
L
= 10k
, 50mV < V
O
< (V+) 50mV
100
117
dB
Over Temperature
R
L
= 10k
, 50mV < V
O
< (V+) 50mV
100
dB
R
L
= 2k
, 200mV < V
O
< (V+) 200mV
92
110
dB
Over Temperature
R
L
= 2k
, 200mV < V
O
< (V+) 200mV
92
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/
s
Settling Time, 0.1%
V
S
= 5V, 2V Step, C
L
= 100pF
1
s
0.01%
V
S
= 5V, 2V Step, C
L
= 100pF
1.6
s
Overload Recovery Time
V
IN
G = V
S
0.2
s
Total Harmonic Distortion + Noise
THD+N
V
S
= 5V, V
O
= 3Vp-p
(2)
, G = 1, f = 1kHz
0.0007
%
OUTPUT
Voltage Output Swing from Rail
(3)
R
L
= 100k
, A
OL
100dB
1
5
mV
Over Temperature
R
L
= 100k
,
A
OL
100dB
5
mV
R
L
= 10k
,
A
OL
100dB
10
50
mV
Over Temperature
R
L
= 10k
, A
OL
100dB
50
mV
R
L
= 2k
,
A
OL
92dB
40
200
mV
Over Temperature
R
L
= 2k
, A
OL
92dB
200
mV
Short-Circuit Current
I
SC
50
mA
Capacitive Load Drive
C
LOAD
See Typical Curve
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
0.85
1.25
mA
Over Temperature
I
O
= 0, V
S
= +5V
1.4
mA
TEMPERATURE RANGE
Specified Range
40
+85
C
Operating Range
55
+125
C
Storage Range
65
+150
C
Thermal Resistance
JA
SOT-23-5 Surface Mount
200
C/W
MSOP-8 Surface Mount
150
C/W
SO-8 Surface Mount
150
C/W
SSOP-16 Surface Mount
100
C/W
SO-14 Surface Mount
100
C/W
TSSOP-14 Surface Mount
125
C/W
NOTES: (1) V
S
= +5V. (2) V
OUT
= 0.25V to 3.25V. (3) Output voltage swings are measured between the output and power supply rails.
OPA343NA, UA
OPA2343EA, UA
OPA4343EA, UA, NA
SPECIFICATIONS: V
S
= 2.7V to 5.5V
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
connected to V
S
/2 and V
OUT
= V
S
/2, unless otherwise noted.
OPA343, 2343, 4343
3
SBOS090A
PACKAGE/ORDERING INFORMATION
Supply Voltage ................................................................................... 7.5V
Signal Input Terminals, Voltage
(2)
..................... (V) 0.5V to (V+) +0.5V
Current
(2)
.................................................... 10mA
Output Short-Circuit
(3)
.............................................................. Continuous
Operating Temperature .................................................. 55
C to +125
C
Storage Temperature ..................................................... 65
C to +150
C
Junction Temperature ...................................................................... 150
C
Lead Temperature (soldering, 10s) ................................................. 300
C
NOTES: (1) Stresses above these ratings may cause permanent damage.
Exposure to absolute maximum conditions for extended periods may de-
grade device reliability. (2) Input terminals are diode-clamped to the power
supply rails. Input signals that can swing more than 0.5V beyond the supply
rails should be current-limited to 10mA or less. (3) Short-circuit to ground,
one amplifier per package.
ABSOLUTE MAXIMUM RATINGS
(1)
The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes no responsibility
for the use of this information, and all use of such information shall be entirely at the user's own risk. Prices and specifications are subject to change without notice. No patent rights or
licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant any BURR-BROWN product for use in life support
devices and/or systems.
ELECTROSTATIC
DISCHARGE SENSITIVITY
This integrated circuit can be damaged by ESD. Burr-Brown
recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling
and installation procedures can cause damage.
ESD damage can range from subtle performance degrada-
tion to complete device failure. Precision integrated circuits
may be more susceptible to damage because very small
parametric changes could cause the device not to meet its
published specifications.
PACKAGE
SPECIFIED
DRAWING
TEMPERATURE
PACKAGE
ORDERING
TRANSPORT
PRODUCT
PACKAGE
NUMBER
RANGE
MARKING
NUMBER
(1)
MEDIA
Single
OPA343NA
5-Lead SOT-23-5
331
40
C to +85
C
B43
OPA343NA/250
Tape and Reel
"
"
"
"
"
OPA343NA /3K
Tape and Reel
OPA343UA
SO-8 Surface-Mount
182
40
C to +85
C
OPA343UA
OPA343UA
Rails
"
"
"
"
"
OPA343UA /2K5
Tape and Reel
Dual
OPA2343EA
MSOP-8 Surface-Mount
337
40
C to +85
C
C43
OPA2343EA /250
Tape and Reel
"
"
"
"
"
OPA2343EA/2K5
Tape and Reel
OPA2343UA
SO-8 Surface-Mount
182
40
C to +85
C
OPA2343UA
OPA2343UA
Rails
"
"
"
"
"
OPA2343UA/2K5
Tape and Reel
Quad
OPA4343EA
SSOP-16 Surface-Mount
322
40
C to +85
C
OPA4343EA
OPA4343EA /250
Tape and Reel
"
"
"
"
"
OPA4343EA /2K5
Tape and Reel
OPA4343UA
SO-14 Surfac-Mount
235
40
C to +85
C
OPA4343UA
OPA4343UA
Rails
"
"
"
"
"
OPA4343UA /2K5
Tape and Reel
OPA4343NA
TSSOP-14 Surface-Mount
357
40
C to +85
C
OPA4343NA
OPA4343NA/250
Tape and Reel
"
"
"
"
"
OPA4343NA/2K5
Tape and Reel
NOTE: (1) Models with a slash (/) are available only in Tape and Reel in the quantities indicated (e.g., /2K5 indicates 2500 devices per reel). Ordering 2500 pieces
of "OPA2343EA/2K5" will get a single 2500 piece Tape and Reel.
OPA343, 2343, 4343
4
SBOS090A
TYPICAL PERFORMANCE CURVES
At T
A
= +25
C, V
S
= +5V, and R
L
= 10k
connected to V
S
/2, unless otherwise noted.
CLOSED-LOOP OUTPUT IMPEDANCE
vs FREQUENCY
5k
4k
3k
2k
1k
0
Output Resistance (
)
Frequency (Hz)
10
100
1k
10k
100k
1M
10M
G = 100
G = 10
G = 1
INPUT VOLTAGE AND CURRENT NOISE
SPECTRAL DENSITY vs FREQUENCY
10k
1k
100
10
1
1k
100
10
1
0.1
Voltage Noise (nV
Hz)
Frequency (Hz)
1
10
100
1k
10k
100k
1M
Current Noise (fA
Hz)
Current Noise
Voltage Noise
TOTAL HARMONIC DISTORTION + NOISE
vs FREQUENCY
0.1
0.01
0.001
0.0001
THD+N (%)
Frequency (Hz)
20
100
1k
10k
20k
R
L
= 600
G = 10
G = 1
R
L
= 2k
R
L
= 2k
R
L
= 10k
R
L
= 600
R
L
= 10k
OPEN-LOOP GAIN/PHASE vs FREQUENCY
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
POWER-SUPPLY and COMMON-MODE
REJECTION vs FREQUENCY
100
80
60
40
20
0
PSRR, CMRR (dB)
Frequency (Hz)
1
10
100
1k
10k
100k
1M
PSRR
CMRR
V
CM
= 0.3V to (V+) 1.8V
CHANNEL SEPARATION vs FREQUENCY
Frequency (Hz)
Channel Separation (dB)
140
130
120
110
100
100
10
1k
10k
100k
Dual and quad devices.
G = 1, all channels.
Quad measured channel A to D
or B to C--other combinations
yield improved rejection.
OPA343, 2343, 4343
5
SBOS090A
QUIESCENT CURRENT vs TEMPERATURE
1100
1000
900
800
700
600
Quiescent Current (A)
Temperature (C)
75
50
25
0
25
50
75
100
125
Per Amplifier
TYPICAL PERFORMANCE CURVES
(Cont.)
At T
A
= +25
C, V
S
= +5V, and R
L
= 10k
connected to V
S
/2, unless otherwise noted.
OPEN-LOOP GAIN AND POWER-SUPPLY REJECTION
vs TEMPERATURE
130
120
110
100
90
80
A
OL
, PSRR (dB)
Temperature (
C)
75
50
25
0
25
50
75
100
125
R
L
= 100k
R
L
= 10k
R
L
= 2k
A
OL
PSRR
COMMON-MODE REJECTION vs TEMPERATURE
100
90
80
70
60
50
40
CMRR (dB)
Temperature (C)
75
50
25
0
25
50
75
100
125
V
S
= 5V, V
CM
= 0.3V to 5.3V
V
S
= 2.7V, V
CM
= 0.3V to 3V
V
S
= 2.7V to 5V, V
CM
= 0.3V to (V+) 1.8V
SHORT-CIRCUIT CURRENT vs TEMPERATURE
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
I
SC
+I
SC
SHORT-CIRCUIT CURRENT vs SUPPLY VOLTAGE
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
+I
SC
I
SC
QUIESCENT CURRENT vs SUPPLY VOLTAGE
Supply Voltage (V)
Quiescent Current (
A)
900
850
800
750
700
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
Per Amplifier
OPA343, 2343, 4343
6
SBOS090A
TYPICAL PERFORMANCE CURVES
(Cont.)
At T
A
= +25
C, V
S
= +5V, and R
L
= 10k
connected to V
S
/2, unless otherwise noted.
INPUT BIAS CURRENT
vs INPUT COMMON-MODE VOLTAGE
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 VOLTAGE SWING vs OUTPUT CURRENT
Output Current (mA)
Output Voltage (V)
5
4
3
2
1
0
0
10
20
30 40
50 60
70 80
90 100
+125C
+25C
55C
+125C
+25C
55C
MAXIMUM OUTPUT VOLTAGE vs FREQUENCY
10M
1M
Frequency (Hz)
100k
6
5
4
3
2
1
0
Output Voltage (Vp-p)
V
S
= 5.5V
V
S
= 2.7V
Maximum output
voltage without
slew rate-induced
distortion.
OFFSET VOLTAGE DRIFT
PRODUCTION DISTRIBUTION
Percent of Amplifiers (%)
Offset Voltage Drift (V/C)
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 14
OFFSET VOLTAGE
PRODUCTION DISTRIBUTION
Percent of Amplifiers (%)
Offset Voltage (mV)
8
8
30
25
20
15
10
5
0
7 6 5 4 3 2 1 0
1
2
3
4
5
6
7
Typical production
distribution of
packaged units.
60
40
20
0
20
40
60
80
100
1000
100
10
1
0.1
INPUT BIAS CURRENT vs TEMPERATURE
Input Bias Current (pA)
Temperature (
C)
OPA343, 2343, 4343
7
SBOS090A
SMALL-SIGNAL STEP RESPONSE
C
L
= 100pF
50mV/div
1
s/div
TYPICAL PERFORMANCE CURVES
(Cont.)
At T
A
= +25
C, V
S
= +5V, and R
L
= 10k
connected to V
S
/2, unless otherwise noted.
LARGE-SIGNAL STEP RESPONSE
C
L
= 100pF
1V/div
1
s/div
SETTLING TIME vs CLOSED-LOOP GAIN
100
10
1
0.1
Settling Time (s)
Closed-Loop Gain (V/V)
1
10
100
1000
0.1%
0.01%
SMALL-SIGNAL OVERSHOOT vs LOAD CAPACITANCE
10k
1000
Load Capacitance (pF)
100
60
50
40
30
20
10
0
Overshoot (%)
G = +1
G = 1
G = 5
See text for
reducing overshoot.
OPA343, 2343, 4343
8
SBOS090A
APPLICATIONS INFORMATION
OPA343 series op amps are fabricated on a state-of-the-art
0.6 micron CMOS process. They are unity-gain stable and
suitable for a wide range of general-purpose applications.
Rail-to-rail input/output make them ideal for driving sam-
pling A/D converters. In addition, excellent ac performance
makes them well-suited for audio applications. The class AB
output stage is capable of driving 600
loads connected to
any point between V+ and ground.
Rail-to-rail input and output swing significantly increases
dynamic range, especially in low-supply applications. Fig-
ure 1 shows the input and output waveforms for the
OPA343 in unity-gain configuration. Operation is from a
single +5V supply with a 10k
load connected to V
S
/2.
The input is a 5Vp-p sinusoid. Output voltage is approxi-
mately 4.98Vp-p.
Power-supply pins should be bypassed with 0.01
F ceramic
capacitors.
OPERATING VOLTAGE
OPA343 series op amps are fully specified from +2.7V to
+5V. However, supply voltage may range from +2.5V to
+5.5V. Parameters are guaranteed over the specified supply
range--a unique feature of the OPA343 series. In addition,
many specifications apply from 40
C to +85
C. Most
behavior remains virtually unchanged throughout the full
operating voltage range. Parameters which vary signifi-
cantly with operating voltages or temperature are shown in
the Typical Performance Curves.
RAIL-TO-RAIL INPUT
The input common-mode voltage range of the OPA343
series extends 500mV beyond the supply rails. This is
achieved with a complementary input stage--an N-channel
input differential pair in parallel with a P-channel differen-
tial pair, as shown in Figure 2. The N-channel pair is active
for input voltages close to the positive rail, typically (V+)
1.3V to 500mV above the positive supply. The P-channel
pair is on for inputs from 500mV below the negative supply
to approximately (V+) 1.3V.
There is a small transition region, typically (V+) 1.5V to
(V+) 1.1V, in which both input pairs are on. This 400mV
transition region can vary
300mV with process variation.
Thus, the transition region (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. Within the 400mV
transition region PSRR, CMRR, offset voltage, offset drift,
and THD may be degraded compared to operation outside
this region.
A double-folded cascode adds the signal from the two input
pairs and presents a differential signal to the class AB output
stage. Normally, input bias current is approximately 200fA,
however, input voltages exceeding the power supplies by
FIGURE 2. Simplified Schematic.
V
S
= +5, G = +1, R
L
= 10k
5
5
0
V
IN
V
OUT
2V/div
FIGURE 1. Rail-to-Rail Input and Output.
V
BIAS1
V
BIAS2
V
IN
+
V
IN
Class AB
Control
Circuitry
V
O
V
(Ground)
V+
Reference
Current
OPA343, 2343, 4343
9
SBOS090A
5k
OPAx343
10mA max
V+
V
IN
V
OUT
I
OVERLOAD
more than 500mV can cause excessive current to flow in or
out of the input pins. Momentary voltages greater than
500mV beyond the power supply can be tolerated if the
current on the input pins is limited to 10mA. This is easily
accomplished with an input resistor, as shown in Figure 3.
Many input signals are inherently current-limited to less
than 10mA, therefore, a limiting resistor is not required.
capacitive load reacts with the op amp's output resistance,
along with any additional load resistance, to create a pole in
the small-signal response which degrades the phase margin.
In unity gain, OPA343 series op amps perform well, with a
pure capacitive load up to approximately 1000pF. Increasing
gain enhances the amplifier's ability to drive more capaci-
tance. See the typical performance curve "Small-Signal
Overshoot vs Capacitive Load."
One method of improving capacitive load drive in the unity
gain configuration is to insert a 10
to 20
resistor in series
with the output, as shown in Figure 4. This significantly
reduces ringing with large capacitive loads. However, if
there is a resistive load in parallel with the capacitive load,
R
S
creates a voltage divider. This introduces a dc error at the
output and slightly reduces output swing. This error may be
insignificant. For instance, with R
L
= 10k
and R
S
= 20
,
there is only about a 0.2% error at the output.
DRIVING A/D CONVERTERS
OPA343 series op amps are optimized for driving medium
speed (up to 100kHz) sampling A/D converters. However,
they also offer excellent performance for higher-speed
converters. The OPA343 series provides an effective means
of buffering the A/D's input capacitance and resulting
charge injection while providing signal gain. For applica-
tions requiring high accuracy, the OPA340 series is recom-
mended.
Figures 5 and 6 show the OPA343 driving an ADS7816.
The ADS7816 is a 12-bit, micro-power sampling converter
in the tiny MSOP-8 package. When used with the minia-
ture package options of the OPA343 series, the combina-
tion is ideal for space-limited and low-power applications.
For further information consult the ADS7816 data sheet.
With the OPA343 in a noninverting configuration, an RC
network at the amplifier's output can be used to filter high
frequency noise in the signal (see Figure 5). In the invert-
ing configuration, filtering may be accomplished with a
capacitor across the feedback resistor (see Figure 6).
FIGURE 3. Input Current Protection for Voltages Exceeding
the Supply Voltage.
RAIL-TO-RAIL OUTPUT
A class AB output stage with common-source transistors is
used to achieve rail-to-rail output. For light resistive loads
(>50k
), the output voltage is typically a few millivolts
from the supply rails. With moderate resistive loads (2k
to
50k
), the output can swing to within a few tens of milli-
volts from the supply rails and maintain high open-loop
gain. See the typical performanc curve "Output Voltage
Swing vs Output Current."
CAPACITIVE LOAD AND STABILITY
OPA343 series op amps can drive a wide range of capacitive
loads. However, all op amps under certain conditions may
become unstable. Op amp configuration, gain, and load
value are just a few of the factors to consider when determin-
ing stability. An op amp in unity gain configuration is the
most susceptible to the effects of capacitive load. The
FIGURE 4. Series Resistor in Unity-Gain Configuration Improves Capacitive Load Drive.
10
to
20
OPAx343
V+
V
IN
V
OUT
R
S
R
L
C
L
OPA343, 2343, 4343
10
SBOS090A
FIGURE 8. Transimpedance Amplifier.
FIGURE 5. OPA343 in Noninverting Configuration Driving ADS7816.
FIGURE 7. Speech Bandpass Filter.
FIGURE 6. OPA343 in Inverting Configuration Driving ADS7816.
ADS7816
12-Bit A/D
DCLOCK
D
OUT
CS/SHDN
OPA343
+5V
For improved accuracy use OPA340.
V
IN
V+
2
+In
3
In
V
REF
8
4
GND
Serial
Interface
1
0.1F
0.1F
7
6
5
NOTE: A/D Input = 0 to V
REF
V
IN
= 0V to 5V for
0V to 5V output.
RC network filters high frequency noise.
500
3300pF
ADS7816
12-Bit A/D
DCLOCK
D
OUT
CS/SHDN
OPA343
+5V
For improved accuracy use OPA340.
V
IN
V+
2
+In
3
In
V
REF
8
4
GND
Serial
Interface
1
0.1F
0.1F
7
6
5
NOTE: A/D Input = 0 to V
REF
5k
5k
330pF
V
IN
= 0V to 5V for 0V to 5V output.
243k
10M
10M
1.74M
220pF
47pF
200pF
1/2
OPA2343
+5V
V
IN
R
L
1/2
OPA2343
Filters 160Hz to 2.4kHz
OPA343
V
O
10M
<1pF (prevents gain peaking)
+V
PACKAGING INFORMATION
ORDERABLE DEVICE
STATUS(1)
PACKAGE TYPE
PACKAGE DRAWING
PINS
PACKAGE QTY
OPA2343EA/250
ACTIVE
VSSOP
DGK
8
250
OPA2343EA/2K5
ACTIVE
VSSOP
DGK
8
2500
OPA2343UA
ACTIVE
SOIC
D
8
100
OPA2343UA/2K5
ACTIVE
SOIC
D
8
2500
OPA343NA/250
ACTIVE
SOP
DBV
5
250
OPA343NA/3K
ACTIVE
SOP
DBV
5
3000
OPA343UA
ACTIVE
SOIC
D
8
100
OPA343UA/2K5
ACTIVE
SOIC
D
8
2500
OPA4343EA/250
ACTIVE
SSOP
DBQ
16
250
OPA4343EA/2K5
ACTIVE
SSOP
DBQ
16
2500
OPA4343NA/250
ACTIVE
TSSOP
PW
14
250
OPA4343NA/2K5
ACTIVE
TSSOP
PW
14
2500
OPA4343UA
ACTIVE
SOIC
D
14
58
OPA4343UA/2K5
NRND
SOIC
D
14
2500
(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.
PACKAGE OPTION ADDENDUM
www.ti.com
3-Oct-2003
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