®
INA
146
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: 570
µ
A
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
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.
APPLICATIONS
q
q
q
q
CURRENT SHUNT MEASUREMENTS
SENSOR AMPLIFIER
SYNCHRONOUS DEMODULATOR
CURRENT AND DIFFERENTIAL LINE
RECEIVER
q
VOLTAGE-CONTROLLED CURRENT
SOURCE
q
BATTERY POWERED SYSTEMS
q
LOW COST AUTOMOTIVE
V+
INSTRUMENTATION
R
1
100kΩ
R
G1
R
G2
7
R
2
10kΩ
R
5
10kΩ
(1%)
5
–
V
IN
2
A2
6
V
O
V
O
= (V
IN
– V
IN
) 0.1 (1 + R
G2
/R
G1
)
+
–
G = 0.1
R
3
100kΩ
A1
R
4
10kΩ
INA146
4
V–
1
Ref
8
V
01
V
IN
+
3
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/ • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
®
©
1999 Burr-Brown Corporation
PDS-1491A
1
Printed in U.S.A. September, 1999
INA146
BURR-BROWN [ BURR-BROWN CORPORATION ]
