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Burr-Brown Corporation - Precision INSTRUMENTATION AMPLIFIER

Numéro de référence INA115BU
Description Precision INSTRUMENTATION AMPLIFIER
Fabricant Burr-Brown Corporation 
Logo Burr-Brown Corporation 





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INA115BU fiche technique
®
INA115
INA115
Precision
INSTRUMENTATION AMPLIFIER
FEATURES
q LOW OFFSET VOLTAGE: 50µV max
q LOW DRIFT: 0.25µV/°C max
q LOW INPUT BIAS CURRENT: 2nA max
q HIGH COMMON-MODE REJECTION:
115dB min
q INPUT OVER-VOLTAGE PROTECTION:
±40V
q WIDE SUPPLY RANGE: ±2.25 TO ±18V
q LOW QUIESCENT CURRENT: 3mA max
q SOL-16 SURFACE-MOUNT PACKAGE
APPLICATIONS
q SWITCHED-GAIN AMPLIFIER
q BRIDGE AMPLIFIER
q THERMOCOUPLE AMPLIFIER
q RTD SENSOR AMPLIFIER
q MEDICAL INSTRUMENTATION
q DATA ACQUISITION
DESCRIPTION
The INA115 is a low cost, general purpose instrumen-
tation amplifier offering excellent accuracy. Its versa-
tile three-op amp design and small size make it ideal
for a wide range of applications. Similar to the model
INA114, the INA115 provides additional connections
to the input op amps, A1 and A2, which improve gain
accuracy in high gains and are useful in forming
switched-gain amplifiers.
A single external resistor sets any gain from 1 to
10,000. Internal input protection can withstand up to
±40V without damage.
The INA115 is laser trimmed for very low offset
voltage (50µV), drift (0.25µV/˚C) and high common-
mode rejection (115dB at G=1000). It operates with
power supplies as low as ±2.25V, allowing use in
battery operated and single 5V supply systems. Quies-
cent current is 3mA maximum.
The INA115 is available in the SOL-16 surface-mount
package, specified for the –40°C to +85°C tempera-
ture range.
VO1 V+
1 13
4 Over-Voltage
VIN Protection
2
3
A1
25k
INA115
25k
25k
Feedback
12
RG
14
15
+5
VIN
Over-Voltage
Protection
25k
A2
25k
A3
25k
11 VO
Ref
10
G = 1 + 50k
RG
87
VO2 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
©1992 Burr-Brown Corporation
PDS-1169B
Printed in U.S.A. October, 1993

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