INA2128 Datasheet, PDF (1/10 Pages) Burr-Brown (TI) – Dual, Low Power INSTRUMENTATION AMPLIFIER

®
INA2128
INA2128
INA2128
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
instrumentation 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 16-pin plastic DIP, and
SOL-16 surface-mount packages, specified for the
–40°C to +85°C temperature range.
V+
9
INA2128
40kΩ
40kΩ
7
G_A = 1 +
50kΩ
R_GA
A_3A
6
V_OA
40kΩ
40kΩ
5
Ref_A
V_IN–B
16
Over-Voltage
Protection
14
R_GB
13
V_IN+B
15
Over-Voltage
Protection
A_1B
25kΩ
25kΩ
A_2B
40kΩ
40kΩ
40kΩ
A_3B
40kΩ
10
G_B
=
1
+
50kΩ
R_GB
11 _VOB
12 _RefB
8
V–
International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: [phone] • Twx: 910-952-1111
Internet: http://www.burr-brown.com/ • FAXLine: [phone] (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: [phone] • Immediate Product Info: [phone]
©_{1994 Burr-Brown Corporation}
PDS-1243C
Printed in U.S.A. January, 1996