Burr-Brown INA152EA Single-supply difference amplifier Datasheet

INA152
www.ti.com
Single-Supply
DIFFERENCE AMPLIFIER
FEATURES
APPLICATIONS
● SWING: to Within 200mV of Either Output Rail
● DIFFERENCE INPUT AMPLIFIER
BUILDING BLOCK
● UNITY-GAIN INVERTING AMPLIFIER
● GAIN = 1/2
● AMPLIFIER GAIN = 2 AMPLIFIER
● SUMMING AMPLIFIER
● SYNCHRONOUS DEMODULATOR
● CURRENT AND DIFFERENTIAL LINE
RECEIVER
● VOLTAGE-CONTROLLED CURRENT
SOURCE
● BATTERY-POWERED SYSTEMS
● LOW-COST AUTOMOTIVE INSTRUMENTATION
● LOW OFFSET DRIFT: ±3µV/°C
● LOW OFFSET VOLTAGE: ±250µV
● HIGH CMR: 94dB
● LOW GAIN ERROR: 0.01%
● LOW GAIN ERROR DRIFT: 1ppm/°C
● WIDE SUPPLY RANGE:
Single: 2.7V to 20V
Dual: ±1.35V to ±10V
● MSOP-8 PACKAGE
DESCRIPTION
negative rails and the output swings to within 50mV of
either rail.
The INA152 is a small (MSOP-8), low-power, unitygain difference amplifier consisting of a CMOS op
amp and a precision resistor network. The on-chip
resistors are laser trimmed for accurate gain and high
common-mode rejection. Excellent TCR tracking of
the resistor maintains gain accuracy and commonmode rejection over temperature. The input commonmode voltage range extends to above the positive and
VIN–
2
40kΩ
The difference amplifier is the foundation of many
commonly used circuits. The INA152 provides precision circuit function without using an expensive precision network.
The INA152 is specified for operation over the extended industrial temperature range, –40°C to +85°C.
INA152
40kΩ
5
6
VIN+
3
VO
40kΩ
40kΩ
7
V+
Copyright © 2001, Texas Instruments Incorporated
Sense
4
V–
SBOS184
1
Ref
Printed in U.S.A. January, 2001
SPECIFICATIONS: VS = ±10V
TA = +25°C, VS = ±10V, RL = 10kΩ connected to ground, and reference pin connected to ground, unless otherwise noted.
INA152EA
PARAMETER
OFFSET VOLTAGE
Input Offset Voltage
vs Temperature
vs Power Supply
vs Time
CONDITIONS
MIN
RTO(1) (2)
VCM = 0V
TA = –40°C to +85°C
VS = ±1.35V to ±10V
TYP
MAX
UNITS
±250
±3
5
0.5
±1500
±15
30
µV
µV/°C
µV/V
µV/mo
2(V+) – 2
94
V
dB
80
80
kΩ
kΩ
97
87
2.4
nV/√Hz
nV/√Hz
µVp-p
INPUT VOLTAGE RANGE(3)
Common-Mode Voltage Range
VIN+ – VIN– = 0V
Common-Mode Rejection
2(V–)
80
INPUT IMPEDANCE(4)
Differential
Common-Mode
OUTPUT NOISE VOLTAGE(1) (5)
fO = 10Hz
fO = 1kHz
fB = 0.1Hz to 10Hz
GAIN
Initial(6)
Gain Error
Gain Temperature Drift Coefficient
Nonlinearity
FREQUENCY RESPONSE
Small Signal
Slew Rate
Settling Time, 0.1%
, 0.01%
Overload Recovery
OUTPUT
Voltage
Load Capacitance Stability
Short-Circuit Curent
RTO
(V–) + 0.3V < VO < (V+) – 0.350V
1
±0.01
±1
±0.002
9V Step
9V Step
50% Overdrive
800
0.4
23
25
5
kHz
V/µs
µs
µs
µs
(V+) – 0.02
(V–) + 0.15
500
+7, –12
V
V
pF
mA
RL = 10kΩ to GND
Continuous to Common
POWER SUPPLY
Rated Voltage
Voltage Range
Current, Quiescent
TEMPERATURE RANGE
Specification
Operating
θJA, Junction to Ambient
(V+) – 0.35
(V–) + 0.3
±0.1
±10
±0.005
±10
±1.35
2.7
IO = 0mA
500
–40
–55
±10
20
650
+85
+125
150
V/V
%
ppm/°C
% of FS
V
V
V
µA
°C
°C
°C/W
NOTES: (1) Referred to output in unity-gain difference configuration. Note that this circuit has a gain of 2 for the op amp’s offset voltage and noise voltage.
(2) Includes effects of amplifier’s input bias and offset currents. (3) Limit IIN through 40kΩ resistors to 1mA. (4) 40kΩ resistors are ratio matched but have ±20%
absolute value. (5) Includes effects of amplifier’s input current noise and thermal noise contribution of resistor network. (6) Connected as difference amplifier.
2
INA152
SBOS184
SPECIFICATIONS: VS = +5V
TA = +25°C, VS = +5V, Ref connected to VS/2, RL = 10kΩ connected to VS/2, unless otherwise noted.
INA152EA
PARAMETER
CONDITIONS
MIN
RTO(1) (2)
VCM = VOUT = 0V
TA = –40°C ≤ TA ≤ 85°C
OFFSET VOLTAGE
Input Offset Voltage
vs Temperature
INPUT VOLTAGE RANGE(3)
Voltage Range, Common-Mode
Common-Mode Rejection
VIN+ – VIN– = 0V
0V < VCM < +5V, RSRC = 0Ω
OUTPUT
Voltage
–2.5
80
TYP
MAX
UNITS
±250
±3
±1500
±15
µV
µV/°C
+5.5
94
V
dB
(V–) + 0.05
V
V
V
(V+) – 0.2
(V–) + 0.2
RL = 10kΩ to GND
NOTES: (1) Referred to output in unity-gain difference configuration. Note that this circuit has a gain of 2 for the op amp’s offset voltage and noise voltage.
(2) Includes effects of amplifier’s input bias and offset currents. (3) Limit IIN through 40kΩ resistors to 1mA.
ELECTROSTATIC
DISCHARGE SENSITIVITY
PIN CONFIGURATION
Top View
MSOP-8
Ref
1
VIN–
2
VIN+
V–
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.
8
NC
7
V+
3
6
VO
4
5
Sense
INA152
ESD damage can range from subtle performance degradation
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.
NC = No Internal Connection
ABSOLUTE MAXIMUM RATINGS(1)
Supply Voltage, V+ to V– .................................................................. +22V
Signal Input Terminals .................................................. +20V Continuous
Output Short-Circuit to GND Duration .................................... Continuous
Operating Temperature .................................................. –55°C to +125°C
Storage Temperature ..................................................... –55°C to +125°C
Junction Temperature .................................................................... +150°C
Lead Temperature (soldering, 10s) ............................................... +300°C
PACKAGE/ORDERING INFORMATION
PRODUCT
PACKAGE
PACKAGE
DRAWING
NUMBER
INA152EA
"
MSOP-8
"
337
"
SPECIFIED
TEMPERATURE
RANGE
PACKAGE
MARKING
ORDERING
NUMBER(1)
TRANSPORT
MEDIA
–40°C to +85°C
"
B52
"
INA152EA/250
INA152EA/2K5
Tape and Reel
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 “INA152EA/2K5” will get a single 2500-piece Tape and Reel.
INA152
SBOS184
3
TYPICAL PERFORMANCE CURVES
At TA = +25°C, VS = ±10V, RL = 10kΩ connected to GND, and Ref = GND, unless otherwise noted.
GAIN vs FREQUENCY
COMMON-MODE REJECTION vs FREQUENCY
100
Commom-Mode Rejection (dB)
20
Closed-Loop Gain (dB)
CL = 500pF
0
–20
–40
–60
100k
1M
60
40
VS = ±10V or ±2.5V
20
100
–80
10k
80
10M
1k
10k
Frequency (Hz)
Peak-to-Peak Output Voltage (V)
Power-Supply Rejection (dB)
25
100
–PSRR
80
60
+PSRR
40
20
0
10
100
1k
10k
100k
20
15
10
5
0
100
1M
1k
10k
100k
1M
Frequency (Hz)
Frequency (Hz)
SHORT-CIRCUIT CURRENT vs TEMPERATURE
QUIESCENT CURRENT vs TEMPERATURE
10
700
600
5
VS = ±10V
Short-Circuit Current (mA)
Quiescent Current (µA)
1M
MAXIMUM OUTPUT VOLTAGE vs FREQUENCY
POWER-SUPPLY REJECTION vs FREQUENCY
120
500
VS = ±2.5V
400
300
200
100
0
VS = ±2.5V
VS = ±10V
–5
–10
–15
–20
–25
0
–75
–50
–25
0
25
50
Temperature (°C)
4
100k
Frequency (Hz)
75
100
125
–60
–40
–20
0
20
40
60
80
100
120
Temperature (°C)
INA152
SBOS184
TYPICAL PERFORMANCE CURVES
(Cont.)
At TA = +25°C, VS = ±10V, RL = 10kΩ connected to GND, and Ref = GND, unless otherwise noted.
OUTPUT VOLTAGE SWING vs OUTPUT CURRENT
SLEW RATE vs TEMPERATURE
10
0.5
6
Output Voltage Swing (V)
Slew Rate (V/µs)
0.45
0.4
0.35
0.3
VS = ±10V
+25°C
8
–40°C
+85°C
4
2
0
–2
–40°C
+85°C
–4
+25°C
–6
–8
0.25
–10
–60
–40
–20
0
20
40
60
80
100
0
120
2.5
5
2
–40°C
Output Voltage Swing (V)
Output Voltage Swing (V)
+85°C
+25°C
0.5
+25°C
–0.5
+85°C
–1
15
VS = ±1.35V
–40°C
1
0
12.5
1.5
VS = ±2.5V
1
10
OUTPUT VOLTAGE vs OUTPUT CURRENT
OUTPUT VOLTAGE vs OUTPUT CURRENT
2.5
1.5
7.5
Output Current (mA)
Temperature (°C)
–1.5
–2
+25°C
0.5
+85°C
0
–0.5
+85°C
+25°C
–1
–40°C
–40°C
–1.5
–2.5
0
2
4
6
8
10
12
0
14
0.5
1
1.5
2
2.5
Output Current (mA)
Output Current (mA)
0.1Hz TO 10Hz PEAK-TO-PEAK
VOLTAGE NOISE
NOISE SPECTRAL DENSITY
1µV/div
Noise (nV/√Hz)
1k
100
10
0.1
1
10
100
1k
1s/div
Frequency (Hz)
INA152
SBOS184
5
TYPICAL PERFORMANCE CURVES
(Cont.)
At TA = +25°C, VS = ±10V, RL = 10kΩ connected to GND, and Ref = GND, unless otherwise noted.
CL = 470pF
LARGE-SIGNAL STEP RESPONSE
2V/div
50mV/div
CL = 25
50mV/div
SMALL-SIGNAL STEP RESPONSE
50ms/div
25µs/div
SETTLING TIME vs LOAD CAPACITANCE
INPUT COMMON-MODE VOLTAGE
vs OUTPUT VOLTAGE
25
45
VS = ±10V
20
Common-Mode Voltage (V)
Settling Time (µs)
40
0.01%
35
30
0.1%
25
15
10
VS = +5V
5
0
–5
VS = ±2.5V
–10
–15
–20
20
–25
100
–10
1000
–7.5
–5
–2.5
OFFSET VOLTAGE PRODUCTION DISTRIBUTION
16
5
7.5
10
OFFSET VOLTAGE PRODUCTION DISTRIBUTION
VS = ±10V
VS = ±2.5V
Offset Voltage (µV)
1000
800
600
400
1000
800
600
400
200
0
–200
–400
0
–600
2
0
–800
2
200
4
0
4
6
–200
6
8
–400
8
10
–600
10
12
–800
12
–1000
Percentage of Units (%)
14
–1000
Percentage of Units (%)
2.5
16
14
6
0
Output Voltage (V)
Loading Capacitance (pF)
Offset Voltage (µV)
INA152
SBOS184
TYPICAL PERFORMANCE CURVES
(Cont.)
At TA = +25°C, VS = ±10V, RL = 10kΩ connected to GND, and Ref = GND, unless otherwise noted.
OFFSET VOLTAGE DRIFT
OFFSET VOLTAGE DRIFT
40
40
VS = ±10V
Percentage of Units (%)
Percentage of Units (%)
30
25
20
15
10
25
20
15
10
0
0
1
2
3
4
5
6
7
Offset Voltage Drift (µV/°C)
SBOS184
30
5
5
INA152
VS = ±2.5V
35
35
8
9
10
1
2
3
4
5
6
7
8
9
10
Offset Voltage Drift (µV/°C)
7
APPLICATIONS INFORMATION
The INA152 is a low-power difference amplifier suitable for
a wide range of general-purpose applications. Figure 1
shows the basic connections required for operation of the
INA152. Decoupling capacitors are strongly recommended
in applications with noisy or high-impedance power supplies. The capacitors should be placed close to the device
pins, as shown in Figure 1.
As shown in Figure 1, the differential input signal is connected to pins 2 and 3. The source impedances connected to
the inputs must be nearly equal to assure good commonmode rejection. An 8Ω mismatch in source impedance will
degrade the common-mode rejection of a typical device to
approximately 80dB (a 16Ω mismatch degrades CMR to
74dB). If the source has a known impedance mismatch, an
additional resistor in series with the opposite input can be
used to preserve good common-mode rejection.
The INA152’s internal resistors are accurately ratio trimmed
to match. That is, R1 is trimmed to match R2, and R3 is
trimmed to match R4. However, the absolute values may not
be equal (R1 + R2 may be slightly different than R3 + R4).
Thus, large series resistors on the input (greater than 250Ω),
even if well matched, will degrade common-mode rejection.
Circuit-board layout constraints might suggest possible variations in connections of the internal resistors. It might appear
that pins 1 and 3 could be interchanged, however, because of
the ratio trimming technique used (see paragraph above)
CMRR will be degraded. If pins 1 and 3 are interchanged,
pins 2 and 5 must also be interchanged to maintain proper
ratio matching.
OPERATING VOLTAGE
The INA152 operates from single (+2.7V to +20V) or dual
(±1.35V to ±10V) supplies with excellent performance. Specifications are production tested with +5V and ±10V supplies.
Most behavior remains unchanged throughout the full operating voltage range. Parameters that vary significantly with
operating voltage are shown in the typical performance
curves.
INPUT VOLTAGE
The INA152 can accurately measure differential signals that
are above and below the supply rails. Linear common-mode
range extends from 2 • [(V+) – 1V] to 2 • (V–) (nearly twice
the supplies). See the typical performance curve, “Input
Common-Mode Voltage vs Output Voltage”.
OFFSET VOLTAGE TRIM
The INA152 is laser trimmed for low offset voltage and drift.
Most applications require no external offset adjustment.
Figure 2 shows an optional circuit for trimming the output
offset voltage. The output is referred to the output reference
terminal (pin 1), which is normally grounded. A voltage
applied to the Ref terminal will be summed with the output
signal. This can be used to null offset voltage, as shown in
Figure 2. The source impedance of a signal applied to the Ref
terminal should be less than 10Ω to maintain good commonmode rejection.
INA152
V+
V–
2
V2
R1
R2
5
1µF
1µF
7
4
6
VO
INA152
V2
–In
2
R1
40kΩ
R2
40kΩ
10Ω
5
V3
3
R3
R4
6
V3
+In
3
R3
40kΩ
R4
40kΩ
1
V O = V3 – V2
Gain Error = ±0.01%
CMR = 94dB
Nonlinearity = ±0.002%
+V
VO = V3 – V2
Offset Adjustment
Range = ±1mV
1
100kΩ
100kΩ
10Ω
–V
FIGURE 1. Precision Difference Amplifier (Basic Power
Supply and Signal Connections).
8
FIGURE 2. Offset Adjustment.
INA152
SBOS184
TYPICAL APPLICATIONS
V1
–In
INA152
A1
2
5
R2
V+
V+
3
6
R1
INA152
VO
2
R2
5
1
3
7
A2
V2
+In
6
VO = (1 + 2R2/R1) (V2 – V1)
The INA152 can be combined with op amps to form a complete Instrumentation Amplifier (IA) with specialized performance characteristics. Texas
Instruments offers many complete high performance IAs. Products with
related performances are shown at the right in the table below.
FEATURE
SIMILAR COMPLETE
TEXAS INSTRUMENTS IA
OPA2227
Low Noise
INA163
OPA129
Ultra Low Bias Current (fA)
INA116
OPA2277
Low Offset Drift, Low Noise
INA114, INA128
OPA2130
Low Power, FET-Input (pA)
INA121
OPA2234
Single Supply, Precision, Low Power
INA122, INA118
A1, A2
1
Common
VO = (V+)/2
4
Common
FIGURE 5. Pseudoground Generator.
FIGURE 3. Precision Instrumentation Amplifier.
INA152
V2
INA152
2
2
5
5
6
100Ω(1)
1%
6
V–
VO = –V2
V0
0 to 2V
100Ω(1)
1%
3
1
IIN
0 to 20mA
1
3
NOTE: (1) Input series resistors should be less than
250Ω (1% max mismatch) to maintain excellent CMR.
With 100Ω resistors, gain error is increased to 0.5%.
FIGURE 4. Current Receiver with Compliance to Rails.
INA152
SBOS184
FIGURE 6. Precision Unity-Gain Inverting Amplifier.
9
INA152
INA152
5
2
2
6
6
VO = 2 • V1
1
5
VO = V1 + V3
1
V1
V1
V3
3
FIGURE 7. Precision Gain = 2 Amplifier.
3
FIGURE 10. Precision Summing Amplifier.
INA152
+10V
2
2
5
6
+5V Out
REF02
6
VO =
3
V3
INA152
2
V3
5
2
4
–5V Out
6
1
3
1
FIGURE 11. ±5V Precision Voltage Reference.
FIGURE 8. Precision Gain = 1/2 Amplifier.
R2
R1
INA152
2
2
5
INA152
5
6
V1
V3
1
VO =
3
(V1 + V3)
2
6
V1
V3
1
3
(
VO = 1 +
FIGURE 9. Precision Average Value Amplifier.
10
VO
R2
R1
)( V +2 V )
1
3
FIGURE 12. Precision Summing Amplifier with Gain.
INA152
SBOS184
1
Noise (60Hz hum)
INA115
4
A1
2
Transducer or
Analog Signal
25kΩ
3
Feedback
12
25kΩ
25kΩ
A3
RG
Output
11
14
25kΩ
25kΩ
G=1+
50kΩ
RG
15
Noise (60Hz hum)
25kΩ
A2
5
100kΩ
Shield
13
7
V+
8
10
Ref
V–
3
INA152
2
5
6
1
FIGURE 13. Instrumentation Amplifier Guard Drive Generator.
INA152
2
INA152
V1
3
A
V2
B
VO = V3 + V4 – V1 – V2
V3
V4
FIGURE 14. Precision Summing Instrumentation Amplifier.
INA152
SBOS184
11
INA152
2
V2
INA152
5
R
5
2
6
R
V1
A
V1
1
3
6
V01
1
3
IO = (V1 – V2) (1/40k + 1/R)
Load
IO
V2
INA152
FIGURE 15. Precision Voltage-to-Current Converter with
Differential Inputs.
2
5
INA152
V2
6
V02
B
5
2
1
3
6
R
V3
3
V01 – V02 = 2 (V2 – V1)
OPA130
1
FIGURE 18. Differential Output Difference Amplifier.
IO = (V3 – V2)/R
IO
Load
FIGURE 16. Differential Input Voltage-to-Current
Converter for Low IOUT.
V2
2
INA152
5
6
INA152
V2
R (R ≥ 200Ω)
5
2
V3
1
3
Gate can be
+VCC –5V
R
6
R < 200Ω
R
IO
Gate can be
+VS –5V
1
3
(V3 – V2)
Load
R
V3
IO =
IO = (V3 – V2) (1/40k + 1/R)
Load
IO
FIGURE 19. Isolating Current Source with Buffering
Amplifier for Greater Accuracy.
FIGURE 17. Isolating Current Source.
12
INA152
SBOS184
+5V
7
VS
INA152
2
5
Transducer
or
Analog
Signal
6
0V-4V
Input
1
3
12 Bits
Out
ADS7806
4
–5V
Eliminates errors due to different grounds.
FIGURE 20. Differential Input Data Acquisition.
INA152
2
5
V1
DG188
6
3
VO
1
Logic In
VO
0
–V1
1
+V1
1
Logic
In
FIGURE 21. Digitally Controlled Gain of ±1 Amplifier.
INA152
2
D1
D2
V1
Input
R2
–In
1
R3
SBOS184
2
5
6
6
V0 = |V1|
BUF634
VO
R4
R5
2kΩ
FIGURE 22. Precision Absolute Value Buffer.
INA152
BUF634 inside feedback
loop contributes no error.
INA152
5
10pF
3
OPA130
R1
+In
3
1
RL
FIGURE 23. High Output Current Precision Difference
Amplifier.
13
PACKAGE OPTION ADDENDUM
www.ti.com
9-Dec-2004
PACKAGING INFORMATION
Orderable Device
Status (1)
Package
Type
Package
Drawing
Pins Package Eco Plan (2)
Qty
INA152EA/250
ACTIVE
MSOP
DGK
8
250
None
CU SNPB
Level-3-220C-168 HR
INA152EA/2K5
ACTIVE
MSOP
DGK
8
2500
None
CU SNPB
Level-3-220C-168 HR
Lead/Ball Finish
MSL Peak Temp (3)
(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 - May not be currently available - please check http://www.ti.com/productcontent for the latest availability information and additional
product content details.
None: Not yet available Lead (Pb-Free).
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.
Green (RoHS & no Sb/Br): TI defines "Green" to mean "Pb-Free" and in addition, uses package materials that do not contain halogens,
including bromine (Br) or antimony (Sb) above 0.1% of total product weight.
(3)
MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDECindustry 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
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Addendum-Page 1
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