®
INA
145
INA145
For most current data sheet and other product
information, visit www.burr-brown.com
Programmable Gain
DIFFERENCE AMPLIFIER
FEATURES
q
DIFFERENTIAL GAIN = 1V/V TO 1000V/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
HIGH COMMON-MODE VOLTAGE:
+8V at V
S
= +5V
±
28V at V
S
=
±
15V
q
LOW GAIN ERROR: 0.01%
q
HIGH CMR: 86dB
q
SO-8 PACKAGE
DESCRIPTION
The INA145 is a precision, unity-gain difference
amplifier consisting of a precision op amp and on-
chip precision resistor network. Two external resistors
set the gain from 1V/V to 1000V/V. The input com-
mon-mode voltage range extends beyond the positive
and negative rails.
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.
The INA145 is available in the SO-8 surface-mount
package specified for the extended industrial tempera-
ture range, –40°C to +85°C.
APPLICATIONS
q
CURRENT SHUNT MEASUREMENTS
q
SENSOR AMPLIFIER
q
DIFFERENTIAL LINE RECEIVER
q
BATTERY POWERED SYSTEMS
R
G1
V+
7
R
1
40kΩ
R
2
40kΩ
R
5
10kΩ
(1%)
G=1
R
3
40kΩ
A1
R
4
40kΩ
R
G
5
R
G2
–
V
IN
2
A2
6
V
O
V
O
= (V
IN
– V
IN
)(1 + R
G2
/R
G1
)
+
–
V
IN
+
3
INA145
4
V–
1
Ref
8
V
01
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-1567B
1
Printed in U.S.A. March, 2000
INA145
BURR-BROWN [ BURR-BROWN CORPORATION ]
