292A

Features:

Low Cost
Isolated Power Supply: +13V dc @ +5mA (290A) or ±15mA (292A)
Low Nonlinearity: 0.1% @ 10V pk-pk Output
High Gain Stability: 0.001 %/1000 Hours; 0.01%/°C
Small Size: 1.5" x 1.5" x 0.62"
Range: 20V pk-pk
Low Input Offset Voltage Drift: 10µ/°C (Gain = 100V/V)
Wide Input/Output Dynamic Range: 20V pk-pk
High CMV Isolation: 1500V dc, Continuous
Wide Gain Range: 1 to 100V/V
Multichannel Capability Using External Oscillator (292A)



Application

Ground Loop Elimination in Industrial and Process
Control High Voltage Protection in Data Acquisition
Systems
Fetal Heart Biomedical and Monitoring Instrumentation
Off -Ground Signal Measurements


Description

Models 290A and 292A are low cost, compact, isolation amplifiers that are optimized for single and multichannel industrial applications,respectively. The model 290A has a self-contained oscillator and is intended for single channel applications. A single external synchronizing oscillator can drive up to 16 model 292A's or, a virtually limitless number of model 292A's can be configured using multiple oscillators. The user can supply the external oscillator circuit or specify model 281 oscillator module, which includes a voltage regulator for operation over a wide single supply voltage range of +8V to +28V.

Models 290A and 292A design features include: adjustable gain, from 1 to 100V/V, dual isolated power, ±l3V dc, ±1500V dc off ground isolation, l00dB minimum CMR at 60Hz, 1kΩ source imbalance, in a compact 1.5" X 1.5" X 0.6" module. Models 290A and 292A achieve low input noise of lµV pk-pk (10Hz bandwidth, G = 100V/V),nonlinearity of ±0.1% @ 10V pk-pk output, and an input/output dynamic range of 20V pk-pk.

Using modulation techniques with reliable transformer isolation,models 290A and 292A will interrupt ground loops, leakage paths, and voltage transients, while providing dc to 2kHz (-3dB) response.