DIFFERENCE AMPLIFIERS
Description
®
INA 214 3
INA
INA143 INA2143
143
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High-Speed, Precision, G = 10 or G = 0.
1 DIFFERENCE AMPLIFIERS
FEATURES
q DESIGNED FOR LOW COST q G = 10V/V or G = 0.
1V/V q SINGLE, DUAL VERSIONS q LOW OFFSET VOLTAGE: ±250µV max, ±3µV/°C max q LOW GAIN ERROR: 0.
01% q HIGH SLEW RATE: 5V/µs q FAST SETTLING TIME: 9µs to 0.
01% q LOW QUIESCENT CURRENT: 950µA q WIDE SUPPLY RANGE: ±2.
25V to ±18V q SO-8 and SO-14 PACKAGES
APPLICATIONS
q DIFFERENTIAL INPUT AMPLIFIER BUILDING BLOCK q DIFF IN/DIFF OUT AMPLIFIER q GAIN = –10 INVERTING AMPLIFIER q GAIN = +10 NON-INVERTING AMPLIFIER q GAIN = +11 NON-INVERTING AMPLIFIER q SYNCHRONOUS DEMODULATOR q CURRENT/DIFFERENTIAL LINE RECEIVER q VOLTAGE-CONTROLLED CURRENT SOURCE q BATTERY POWERED SYSTEMS q LOW COST AUTOMOTIVE The differential amplifier is the foundation of many commonly used circuits.
The low cost INA143 and INA2143 provide this precision circuit function without using an expensive precision network.
The single version, INA143, package is the SO-8 surface mount.
The dual version, INA2143, package is the SO-14 surface mount.
Both are specified for operation over the extended industrial temperature range, –40°C to +85°C.
Operation is from –55°C to +125°C.
V+ 11 10kΩ 100kΩ
DESCRIPTION
The INA143 and INA2143 are high slew rate, gain of 10V/V or 0.
1V/V difference amplifiers consisting of a precision op amp with a precision resistor network.
The on-chip resistors are laser trimmed for accurate gain and high common-mode rejection.
Excellent TCR tracking of the resistor maintains gain accuracy and commonmode rejection over temperature.
They operate over a wide supply range, ±2.
25V to ±18V (+4.
5V to +36V single supply), and input common-mode voltage range extends beyond the positive and negative supply rails.
–In A
V+ 7 10kΩ 100kΩ
2
12
Sense A
A
13
Out A
–In
2
5
Sense
+In A
3
10kΩ
100kΩ
14
Ref A
6
Output
–In B
6
10kΩ
100kΩ
10
Sense B
...
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