INA146 Datasheet, PDF (1/11 Pages) Burr-Brown (TI) – High-Voltage, Programmable Gain DIFFERENCE AMPLIFIER

®
INA146
INA146
For most current data sheet and other product
information, visit www.burr-brown.com
High-Voltage, Programmable Gain
DIFFERENCE AMPLIFIER
FEATURES
q HIGH COMMON-MODE VOLTAGE:
+40V at V_S = +5V
±100V at V_S = ±15V
q DIFFERENTIAL GAIN = 0.1V/V TO 100V/V:
Set with External Resistors
q LOW QUIESCENT CURRENT: 570µA
q WIDE SUPPLY RANGE:
Single Supply: 4.5V to 36V
Dual Supplies: ±2.25V to ±18V
q LOW GAIN ERROR: 0.025%
q HIGH CMR: 80dB
q SO-8 PACKAGE
APPLICATIONS
q CURRENT SHUNT MEASUREMENTS
q SENSOR AMPLIFIER
q SYNCHRONOUS DEMODULATOR
q CURRENT AND DIFFERENTIAL LINE
RECEIVER
q VOLTAGE-CONTROLLED CURRENT
SOURCE
q BATTERY POWERED SYSTEMS
q LOW COST AUTOMOTIVE
V+
INSTRUMENTATION
7
R₁
100kΩ
V_IN–
2
R₂
10kΩ
G = 0.1
A1
R₃
100kΩ
V_IN+
3
R₄
10kΩ
4
V–
DESCRIPTION
The INA146 is a precision difference amplifier that
can be used to accurately attenuate high differential
voltages and reject high common-mode voltages for
compatibility with common signal processing voltage
levels. High-voltage capability also affords inherent
input protection. The input common-mode range ex-
tends beyond both supply rails, making the INA146
well-suited for both single and dual supply applica-
tions.
On-chip precision resistors are laser-trimmed to achieve
accurate gain and high common-mode rejection. Ex-
cellent TCR tracking of these resistors assures contin-
ued high precision over temperature.
A 10:1 difference amplifier provides 0.1V/V gain
when the output amplifier is used as a unity-gain
buffer. In this configuration, input voltages up to
±100V can be measured. Gains greater than 0.1V/V
can be set with an external resistor pair without affect-
ing the common-mode input range.
The INA146 is available in the SO-8 surface-mount
package specified for the extended industrial tempera-
ture range, –40°C to +85°C.
R_G1
R_G2
5
R₅
10kΩ
(1%)
A2
6
V_O
V_O = (V_I+N – V_I–N) 0.1 (1 + R_G2/R_G1)
INA146
1
8
Ref
V₀₁
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Twx: 910-952-1111 • Internet: http://www.burr-brown.com/ • Cable: BBRCORP • Telex: 066-6491 • FAX: [phone] • Immediate Product Info: [phone]
©1999 Burr-Brown Corporation
PDS-11491A
®
INA146 ^{Printed in U.S.A. September, 1999}