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FEATURES User Programmed Gains of 1 to 10,000 Low Gain Error: 0.02% Max Low Gain TC: 5 ppm/ ؇C Max Low Nonlinearity: 0...
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FEATURES User Programmed Gains of 1 to 10,000 Low Gain Error: 0.02% Max Low Gain TC: 5 ppm/ ؇C Max Low Nonlinearity: 0.001% Max Low Offset
Voltage: 25 V Low Noise 4 nV/√Hz (at 1 kHz) RTI Gain Bandwidth Product: 25 MHz 16-Lead Ceramic or Plastic DIP Package, 20-Terminal LCC Package Standard Military Drawing Available MlL-Standard Parts Available Low Cost
–INPUT –GAIN SENSE –GAIN DRIVE
Programmable Gain Instrumentation Amplifier AD625
FUNCTIONAL BLOCK DIAGRAM
50⍀ – + – +
AD625
10k⍀ 10k⍀
SENSE
– OUTPUT + 10k⍀ REFERENCE
VB +GAIN DRIVE +GAIN SENSE +INPUT 50⍀ – + – +
10k⍀
PRODUCT DESCRIPTION
PRODUCT HIGHLIGHTS
The AD625 is a precision instrumentation amplifier specifically designed to fulfill two major areas of application: 1) Circuits requiring nonstandard gains (i.e., gains not easily achievable with devices such as the AD524 and AD624). 2) Circuits requiring a low cost, precision software programmable gain amplifier. For low noise, high CMRR, and low drift the AD625JN is the most cost effective instrumentation amplifier solution available. An additional three resistors allow the user to set any gain from 1 to 10,000. The error contribution of the AD625JN is less than 0.05% gain error and under 5 ppm/°C gain TC; performance limitations are primarily determined by the external resistors. Common-mode rejection is independent of the feedback resistor matching. A software programmable gain amplifier (SPGA) can be configured with the addition of a
CMOS multiplexer (or oth...
