XR620A Datasheet, PDF (1/15 Pages) Exar Corporation – Instrumentation Amplifier

XR620A
Instrumentation Amplifier
General Description
The XR620A is a low power, general purpose instrumentation amplifier
with a gain range of 1 to 10,000. The XR620A is offered in 8-lead SOIC or
DIP packages and requires only one external gain setting resistor making
it smaller and easier to implement than discrete, 3-amp designs.
While consuming only 2.2mA of supply current, the XR620A offers a low
6.6nV/Hz input voltage noise and 0.2μVpp noise from 0.1Hz to 10Hz.
The XR620A offers a low input offset voltage of ±125μV that only varies
0.1μV/°C over it’s operating temperature range of -40°C to +85°C. The
XR620A also features 50ppm maximum nonlinearity. These features
make it well suited for use in data acquisition systems.
F E AT U R E S
■■ ±2.3V to ±18V supply voltage range
■■ Gain range of 1 to 10,000
■■ Gain set with one external resistor
■■ ±125μV maximum input offset voltage
■■ 0.1μV/°C input offset drift
■■ 700kHz bandwidth at G = 1
■■ 1.2V/μs slew rate
■■ 90dB minimum CMRR at G = 10
■■ 2.2mA maximum supply current
■■ 6.6nV/√Hz input voltage noise
■■ 70nV/√Hz output voltage noise
■■ 0.2μV_pp input noise (0.1Hz to 10Hz)
■■ DIP-8 or Pb-free SOIC-8
A P P L I C AT I O N S
■■ Bridge amplifier
■■ Weigh scales
■■ Thermocouple amplifier
■■ ECG and medical instrumentation
■■ MRI (Magnetic Resonance Imaging)
■■ Patient monitors
■■ Transducer interface
■■ Data acquisition systems
■■ Strain gauge amplifier
■■ Industrial process controls
Ordering Information - back page
Typical Application
+V_S
–Input
2
1
7
R_G
XR620A
6
8
+Input ³
5
4
Reference
–V_S
V_OUT
Load
To Power
Supply Ground
Thermocouple Amplifier
Competitive Plot
3
2
Competitor A
1
0
-1
XR620A
-2
-3
-4
G=1
V_S = ±15V
-5 _{VOUT = 0.2Vpp}
-6 R_L = 2kΩ
-7
0.0001
0.001
0.01
0.1
Frequency (MHz)
© 2013-2015 Exar Corporation
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exar.com/XR620A
Rev 1B