INA125.pdf 데이터시트 (총 13 페이지) - 파일 다운로드 INA125 데이타시트 다운로드

No Preview Available !

INA125
®
INA125
INA125
INSTRUMENTATION AMPLIFIER
With Precision Voltage Reference
FEATURES
q LOW QUIESCENT CURRENT: 460µA
q PRECISION VOLTAGE REFERENCE:
1.24V, 2.5V, 5V or 10V
q SLEEP MODE
q LOW OFFSET VOLTAGE: 250µV max
q LOW OFFSET DRIFT: 2µV/°C max
q LOW INPUT BIAS CURRENT: 20nA max
q HIGH CMR: 100dB min
q LOW NOISE: 38nV/Hz at f = 1kHz
q INPUT PROTECTION TO ±40V
q WIDE SUPPLY RANGE
Single Supply: 2.7V to 36V
Dual Supply: ±1.35V to ±18V
q 16-PIN DIP AND SO-16 SOIC PACKAGES
DESCRIPTION
The INA125 is a low power, high accuracy instrumen-
tation amplifier with a precision voltage reference. It
provides complete bridge excitation and precision dif-
ferential-input amplification on a single integrated
circuit.
A single external resistor sets any gain from 4 to
10,000. The INA125 is laser-trimmed for low offset
voltage (250µV), low offset drift (2µV/°C), and high
common-mode rejection (100dB at G = 100). It oper-
ates on single (+2.7V to +36V) or dual (±1.35V to
±18V) supplies.
The voltage reference is externally adjustable with pin-
selectable voltages of 2.5V, 5V, or 10V, allowing use
with a variety of transducers. The reference voltage is
accurate to ±0.5% (max) with ±35ppm/°C drift (max).
Sleep mode allows shutdown and duty cycle operation
to save power.
The INA125 is available in 16-pin plastic DIP and
SO-16 surface-mount packages and is specified for
the –40°C to +85°C industrial temperature range.
APPLICATIONS
q PRESSURE AND TEMPERATURE BRIDGE
AMPLIFIERS
q INDUSTRIAL PROCESS CONTROL
q FACTORY AUTOMATION
q MULTI-CHANNEL DATA ACQUISITION
q BATTERY OPERATED SYSTEMS
q GENERAL PURPOSE INSTRUMENTATION
V+ SLEEP
VREFCOM 12
1
INA125
2
VREFBG
VREF2.5
13
14
VREF5
15
10V
VREF10 16
4
VREFOut
VI+N
6
9
RG
8
7
VIN
R
R
2R
4R
Ref
Amp
Bandgap
VREF
A1
30k
10k
10k
A2
30k
3
10
11
Sense
VO
VO = (VI+N – VIN) G
G = 4 + 60k
RG
IAREF
5
V–
International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111 • Twx: 910-952-1111
Internet: http://www.burr-brown.com/ • FAXLine: (800) 548-6133 (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
©1997 Burr-Brown Corporation
PDS-1361B
Printed in U.S.A., February, 1998

No Preview Available !

SPECIFICATIONS: VS = ±15V
At TA = +25°C, VS = ±15V, IA common = 0V, VREF common = 0V, and RL = 10k, unless otherwise noted.
PARAMETER
INPUT
Offset Voltage, RTI
Initial
vs Temperature
vs Power Supply
Long-Term Stability
Impedance, Differential
Common-Mode
Safe Input Voltage
Input Voltage Range
Common-Mode Rejection
BIAS CURRENT
vs Temperature
Offset Current
vs Temperature
NOISE, RTI
Voltage Noise, f = 10Hz
f = 100Hz
f = 1kHz
f = 0.1Hz to 10Hz
Current Noise, f = 10Hz
f = 1kHz
f = 0.1Hz to 10Hz
GAIN
Gain Equation
Range of Gain
Gain Error
Gain vs Temperature
Nonlinearity
OUTPUT
Voltage: Positive
Negative
Load Capacitance Stability
Short-Circuit Current
VOLTAGE REFERENCE
Accuracy
vs Temperature
vs Power Supply, V+
vs Load
Dropout Voltage, (V+) – VREF(2)
Bandgap Voltage Reference
Accuracy
vs Temperature
CONDITIONS
INA125P, U
MIN TYP
MAX
VS = ±1.35V to ±18V, G = 4
VCM = –10.7V to +10.2V
G=4
G = 10
G = 100
G = 500
VCM = 0V
RS = 0
±50
±0.25
±3
±0.2
1011 || 2
1011 || 9
See Text
±250
±2
±20
±40
78 84
86 94
100 114
100 114
10 25
±60
±0.5 ±2.5
±0.5
40
38
38
0.8
170
56
5
VO = –14V to +13.3V
G=4
G = 10
G = 100
G = 500
G=4
G > 4(1)
VO = –14V to +13.3V
G=4
G = 10
G = 100
G = 500
4 + 60k/RG
4 10,000
±0.01
±0.03
±0.05
±0.1
±0.075
±0.3
±0.5
±1 ±15
±25 ±100
±0.0004
±0.0004
±0.001
±0.002
±0.002
±0.002
±0.01
VREF = +2.5V, +5V, +10V
IL = 0
IL = 0
V+ = (VREF + 1.25V) to +36V
IL = 0 to 5mA
Ref Load = 2k
IL = 0
IL = 0
(V+)–1.7
(V–)+1
(V+)–0.9
(V–)+0.4
1000
–9/+12
±0.15
±18
±20
3
1.25 1
1.24
±0.5
±18
±0.5
±35
±50
75
INA125PA, UA
MIN
TYP
MAX
UNITS
T ±500
µV
T ±5 µV/°C
T ±50 µV/V
T µV/mo
T || pF
T || pF
TV
T
72 T
80 T
90 T
90 T
dB
dB
dB
dB
T 50
nA
T pA/°C
T ±5
nA
T pA/°C
T nV/Hz
T nV/Hz
T nV/Hz
T µVp-p
T fA/Hz
T fA/Hz
T pAp-p
T V/V
T T V/V
T ±0.1
T ±0.5
T ±1
T
%
%
%
%
T T ppm/°C
T T ppm/°C
T
±0.004
% of FS
T
±0.004
% of FS
T T % of FS
T % of FS
TT
TT
T
T
V
V
pF
mA
T ±1
%
T
±100
ppm/°C
T
±100
ppm/V
T T ppm/mA
TT
V
TV
T%
T ppm/°C
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.
®
INA125
2

No Preview Available !

SPECIFICATIONS: VS = ±15V (CONT)
At TA = +25°C, VS = ±15V, IA common = 0V, VREF common = 0V, and RL = 10k, unless otherwise noted.
INA125P, U
INA125PA, UA
PARAMETER CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
FREQUENCY RESPONSE
Bandwidth, –3dB
Slew Rate
Settling Time, 0.01%
Overload Recovery
G=4
G = 10
G = 100
G = 500
G = 4, 10V Step
G = 4, 10V Step
G = 10, 10V Step
G = 100, 10V Step
G = 500, 10V Step
50% Overdrive
150
45
4.5
0.9
0.2
60
83
375
1700
5
T kHz
T kHz
T kHz
T kHz
T V/µs
T µs
T µs
T µs
T µs
T µs
POWER SUPPLY
Specified Operating Voltage
±15 T
Specified Voltage Range
Quiescent Current, Positive
Negative
Reference Ground Current(3)
IO = IREF = 0mA
IO = IREF = 0mA
±1.35
±18 T
T
460 525
TT
–280
–325
TT
180 T
Sleep Current (VSLEEP 100mV)
RL = 10k, Ref Load = 2k
±1 ±25
TT
SLEEP MODE PIN(4)
VIH (Logic high input voltage)
VIL (Logic low input voltage)
IIH (Logic high input current)
IIL (Logic low input current)
Wake-up Time(5)
+2.7
V+ T
T
0
+0.1
T
T
15 T
0T
150 T
V
V
µA
µA
µA
µA
V
V
µA
µA
µs
TEMPERATURE RANGE
Specification Range
Operation Range
Storage Range
Thermal Resistance, θJA
16-Pin DIP
SO-16 Surface-Mount
–40 +85 T
–55
+125
T
–55
+125
T
T °C
T °C
T °C
80 T °C/W
100 T °C/W
T Specification same as INA125P, U.
NOTES: (1) Temperature coefficient of the "Internal Resistor" in the gain equation. Does not include TCR of gain-setting resistor, RG. (2) Dropout voltage is the
positive supply voltage minus the reference voltage that produces a 1% decrease in reference voltage. (3) VREFCOM pin. (4) Voltage measured with respect to
Reference Common. Logic low input selects Sleep mode. (5) IA and Reference, see Typical Performance Curves.
SPECIFICATIONS: VS = +5V
At TA = +25°C, VS = +5V, IA common at VS /2, VREF common = VS /2, VCM = VS/2, and RL = 10kto VS/2, unless otherwise noted.
PARAMETER
INPUT
Offset Voltage, RTI
Initial
vs Temperature
vs Power Supply
Input Voltage Range
Common-Mode Rejection
GAIN
Gain Error
OUTPUT
Voltage, Positive
Negative
POWER SUPPLY
Specified Operating Voltage
Operating Voltage Range
Quiescent Current
Sleep Current (VSLEEP 100mV)
T Specification same as INA125P, U.
CONDITIONS
INA125P, U
MIN TYP
MAX
VS = +2.7V to +36V
VCM = +1.1V to +3.6V
G=4
G = 10
G = 100
G = 500
±75
±0.25
3
See Text
±500
20
78 84
86 94
100 114
100 114
VO = +0.3V to +3.8V
G=4
±0.01
(V+)–1.2 (V+)–0.8
(V–)+0.3 (V–)+0.15
+5
+2.7
+36
IO = IREF = 0mA
RL = 10k, Ref Load = 2k
460 525
±1 ±25
INA125PA, UA
MIN
TYP
MAX
T ±750
T
T 50
T
72 T
80 T
90 T
90 T
T
TT
TT
T
TT
TT
TT
3 INA125
UNITS
µV
µV/°C
µV/V
dB
dB
dB
dB
%
V
V
V
V
µA
µA
®

No Preview Available !

PIN CONFIGURATION
Top View
V+ 1
SLEEP 2
V– 3
VREFOUT 4
IAREF
VI+N
VIN
5
6
7
RG 8
16-Pin DIP, SO-16
16 VREF10
15 VREF5
14 VREF2.5
13 VREFBG
12 VREFCOM
11 Sense
10 VO
9 RG
ELECTROSTATIC
DISCHARGE SENSITIVITY
This integrated circuit can be damaged by ESD. Burr-Brown
recommends that all integrated circuits be handled with ap-
propriate 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 more susceptible to damage because very small parametric
changes could cause the device not to meet its published
specifications.
ABSOLUTE MAXIMUM RATINGS(1)
Power Supply Voltage, V+ to V– ........................................................ 36V
Input Signal Voltage .......................................................................... ±40V
Output Short Circuit ................................................................. Continuous
Operating Temperature ................................................. –55°C to +125°C
Storage Temperature ..................................................... –55°C to +125°C
Lead Temperature (soldering, 10s) ............................................... +300°C
NOTE: Stresses above these ratings may cause permanent damage.
PACKAGE INFORMATION
PRODUCT
PACKAGE
PACKAGE DRAWING
NUMBER(1)
INA125PA
INA125P
16-Pin Plastic DIP
16-Pin Plastic DIP
180
180
INA125UA
INA125U
SO-16 Surface-Mount
SO-16 Surface-Mount
265
265
NOTES: (1) For detailed drawing and dimension table, please see end of data
sheet, or Appendix C of Burr-Brown IC Data Book.
®
INA125
4

No Preview Available !

TYPICAL PERFORMANCE CURVES
At TA = +25°C and VS = ±15V, unless otherwise noted.
60
G = 500
50
G = 100
40
30
G = 10
20
G=4
10
0
1 10
GAIN vs FREQUENCY
100 1k 10k
Frequency (Hz)
100k
1M
COMMON-MODE REJECTION vs FREQUENCY
120
G = 100, 500
100
80
G = 10
60
G=4
40
20
G = 500
G = 100
0
1 10 100 1k 10k 100k 1M
Frequency (Hz)
140
120
100
80
60
40
20
1
POSITIVE POWER SUPPLY REJECTION
vs FREQUENCY
G=4
G = 500
G = 100
G = 10
10 100 1k 10k 100k 1M
Frequency (Hz)
INPUT COMMON-MODE VOLTAGE
vs OUTPUT VOLTAGE, VS = ±15V
15
Limited by A2 output swing—see text
10
5
0
–5
–10
–15
–15
VD/2
VD/2
+
+
–+
VCM
+15V
–15V
VO
IAREF
Limited by A2 output swing—see text
–10 –5
0
5 10 15
Output Voltage (V)
120
100
80
60
40
20
0
1
NEGATIVE POWER SUPPLY REJECTION
vs FREQUENCY
G = 100
G = 500
G = 10
G=4
10
100
1k
10k 100k
1M
Frequency (Hz)
INPUT COMMON-MODE VOLTAGE
vs OUTPUT VOLTAGE, VS = ±5V
5
4
IAREF
=
0V
Limited
by
A2
output
swing—see
text
3
2 VS = +5V
1
0
–1
–2 VS = ±5V
–3
–4 Limited by A2 output swing—see text
–5
–5 –4 –3 –2 –1 0 1 2 3
Output Voltage (V)
4
5
®
5 INA125