®
INA
212
8
INA2128
INA
212
8
Dual, Low Power
INSTRUMENTATION AMPLIFIER
FEATURES
q
LOW OFFSET VOLTAGE: 50
µ
V max
q
LOW DRIFT: 0.5
µ
V/
°
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: 700
µ
A / IA
q
16-PIN PLASTIC DIP, SOL-16
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
V
INA
–
APPLICATIONS
q
SENSOR AMPLIFIER
THERMOCOUPLE, RTD, BRIDGE
q
MEDICAL INSTRUMENTATION
q
MULTIPLE-CHANNEL SYSTEMS
q
BATTERY OPERATED EQUIPMENT
1
3
Over-Voltage
Protection
INA2128
A
1A
40kΩ
25kΩ
A
3A
6
40kΩ
7
G
A
= 1 + 50kΩ
R
GA
V
OA
R
GA
4
+
V
INA
–
25kΩ
Over-Voltage
Protection
Over-Voltage
Protection
2
A
2A
40kΩ
40kΩ
5
Ref
A
V
INB
16
14
A
1B
40kΩ
25kΩ
A
3B
40kΩ
10
G
B
= 1 +
11
50kΩ
R
GB
R
GB
13
+
V
INB
V
OB
25kΩ
Over-Voltage
Protection
15
A
2B
40kΩ
8
V–
40kΩ
12
Ref
B
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
©
1994 Burr-Brown Corporation
PDS-1243C
Printed in U.S.A. January, 1996
BURR-BROWN [ BURR-BROWN CORPORATION ]
