參數(shù)資料
型號: INA125U
元件分類: 測量放大器
英文描述: Very High Accuracy Instrumentation Amplifier
中文描述: 極高精度儀表放大器
文件頁數(shù): 1/13頁
文件大?。?/td> 273K
代理商: INA125U
1997 Burr-Brown Corporation
PDS-1361B
Printed in U.S.A., February, 1998
INA125
INSTRUMENTATION AMPLIFIER
With Precision Voltage Reference
FEATURES
G
LOW QUIESCENT CURRENT: 460
μ
A
G
PRECISION VOLTAGE REFERENCE:
1.24V, 2.5V, 5V or 10V
G
SLEEP MODE
G
LOW OFFSET VOLTAGE: 250
μ
V max
G
LOW OFFSET DRIFT: 2
μ
V/
°
C max
G
LOW INPUT BIAS CURRENT: 20nA max
G
HIGH CMR: 100dB min
G
LOW NOISE: 38nV/
Hz at f = 1kHz
G
INPUT PROTECTION TO
±
40V
G
WIDE SUPPLY RANGE
Single Supply: 2.7V to 36V
Dual Supply:
±
1.35V to
±
18V
G
16-PIN DIP AND SO-16 SOIC PACKAGES
APPLICATIONS
G
PRESSURE AND TEMPERATURE BRIDGE
AMPLIFIERS
G
INDUSTRIAL PROCESS CONTROL
G
FACTORY AUTOMATION
G
MULTI-CHANNEL DATA ACQUISITION
G
BATTERY OPERATED SYSTEMS
G
GENERAL PURPOSE INSTRUMENTATION
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 (250
μ
V), low offset drift (2
μ
V/
°
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.
A
1
Ref
Amp
10V
A
2
30k
10k
10k
30k
Bandgap
V
REF
13
12
1
14
15
16
4
6
9
10
11
IA
REF
5
8
7
R
G
Sense
R
R
2R
4R
INA125
V
REF
COM
V
REF
BG
V
REF
2.5
V
REF
5
V
REF
10
V
REF
Out
V
IN
V+
+
V
IN
2
SLEEP
3
V–
V
O
= (V
IN
– V
IN
) G
G = 4 + 60k
+
R
G
V
O
INA125
INA125
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
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