INA2128 Datasheet, PDF (1/17 Pages) Burr-Brown (TI) – Dual, Low Power INSTRUMENTATION AMPLIFIER

INA2128
INA2128
INA2128
SBOS035A – DECEMBER 1995 – REVISED APRIL 2007
Dual, Low Power
INSTRUMENTATION AMPLIFIER
FEATURES
q LOW OFFSET VOLTAGE: 50µV max
q LOW DRIFT: 0.5µV/°C max
q LOW INPUT BIAS CURRENT: 5nA max
q HIGH CMR: 120dB min
q INPUTS PROTECTED TO ±40V
q WIDE SUPPLY RANGE: ±2.25V to ±18V
q LOW QUIESCENT CURRENT: 700µA / IA
q 16-PIN PLASTIC DIP, SOL-16
APPLICATIONS
q SENSOR AMPLIFIER
THERMOCOUPLE, RTD, BRIDGE
q MEDICAL INSTRUMENTATION
q MULTIPLE-CHANNEL SYSTEMS
q BATTERY OPERATED EQUIPMENT
V_IN^–_A
1 Over-Voltage
Protection
3
R_GA
4
V_IN+A
2 Over-Voltage
Protection
A_1A
25kΩ
25kΩ
A_2A
DESCRIPTION
The INA2128 is a dual, low power, general purpose instrumen-
tation amplifier offering excellent accuracy. Its versatile
3-op amp design and small size make it ideal for a wide range
of applications. Current-feedback input circuitry provides wide
bandwidth even at high gain (200kHz at G = 100).
A single external resistor sets any gain from 1 to 10,000.
Internal input protection can withstand up to ±40V without
damage.
The INA2128 is laser-trimmed for very low offset voltage
(50µV), drift (0.5µV/°C) and high common-mode rejection
(120dB at G ≥ 100). It operates with power supplies as low as
±2.25V, and quiescent current is only 700µA per IA—ideal for
battery-operated and multiple-channel systems.
The INA2128 is available in SOL-16 packages, specified
for the –40°C to +85°C temperature range.
V+
9
INA2128
40kΩ
40kΩ
A_3A
7
G_A = 1 +
50kΩ
R_GA
6
V_OA
40kΩ
5
Ref_A
40kΩ
V_IN^–_B
16
Over-Voltage
Protection
14
R_GB
13
+
V_INB
15
Over-Voltage
Protection
A_1B
25kΩ
25kΩ
A_2B
40kΩ
40kΩ
8
V–
40kΩ
A_3B
40kΩ
10
G_B
=
1
+
50kΩ
R_GB
11 _VOB
12 _RefB
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PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
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