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, 鈥?0擄C to +85擄C.
APPLICATIONS
q
CURRENT SHUNT MEASUREMENTS
q
SENSOR AMPLIFIER
q
DIFFERENTIAL LINE RECEIVER
q
BATTERY POWERED SYSTEMS
R
G1
V+
7
R
1
40k鈩?/div>
R
2
40k鈩?/div>
R
5
10k鈩?/div>
(1%)
G=1
R
3
40k鈩?/div>
A1
R
4
40k鈩?/div>
R
G
5
R
G2
鈥?/div>
V
IN
2
A2
6
V
O
V
O
= (V
IN
鈥?V
IN
)(1 + R
G2
/R
G1
)
+
鈥?/div>
V
IN
+
3
INA145
4
V鈥?/div>
1
Ref
8
V
01
International Airport Industrial Park 鈥?Mailing Address: PO Box 11400, Tucson, AZ 85734 鈥?Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 鈥?Tel: (520) 746-1111
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