®
EL8170, EL8173
Data Sheet
March 9, 2006
FN7490.1
Micropower, Single Supply, Rail-to-Rail
Input-Output Instrumentation Amplifiers
The EL8170 and EL8173 are micropower instrumentation
amplifiers optimized for operation at 2.9V to 5V single
supplies. Inputs and outputs can operate rail-to-rail. As with
all instrumentation amplifiers, a pair of inputs provide very
high common-mode rejection and are completely
independent from a pair of feedback terminals. The
feedback terminals allow zero input to be translated to any
output offset, including ground. A feedback divider controls
the overall gain of the amplifier.
The EL8170 is compensated for a gain of 100 or more, and
the EL8173 is compensated for a gain of 10 or more. The
EL8170 and EL8173 have bipolar input devices for best
offset and 1/f noise performance.
The amplifiers can be operated from one lithium cell or two
Ni-Cd batteries. The EL8170 and EL8173 input range
includes ground to slightly above positive rail. The output
stage swings to ground and positive supply - no pull-up or
pull-down resistors are needed.
Features
• 78µA maximum supply current
• Maximum offset voltage
- 250µV (EL8170)
- 1000µV (EL8173)
• 500pA input bias current
• 2µV/°C offset voltage drift
• 396kHz -3dB bandwidth (G = 10)
• 192kHz -3dB bandwidth (G = 100)
• 0.5V/µs slew rate
• Single supply operation
- Input voltage range is rail-to-rail
- Output swings rail-to-rail
• Output sources and sinks ±29mA load current
• 0.2% gain error
• Pb-free plus anneal available (RoHS compliant)
Pinout
EL8170, EL8173
(8 LD SO)
TOP VIEW
ENABLE 1
IN- 2
IN+ 3
VS- 4
-
+
+
-
Applications
• Battery- or solar-powered systems
• Strain gauges
• Current monitors
8 FB+
7 VS+
6 OUT
5 FB-
• Thermocouple amplifiers
Σ
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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Copyright © Intersil Americas Inc. 2006. All Rights Reserved.
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