Model 289

Features:

Low Nonlinearity: ±0.012% max (289L)
Frequency Response: (-3dB) dc to 20kHz
                                  (Full Power) dc to 5kHz
Gain Adjustable 1 to 100V/V, Single Resistor
3-Port Isolation: +2500V CMV Isolation Input/Output
Low Gain Drift: ±0.005%/°C max
Floating Power Output: ±15V @ ±5mA
120dB CMR at 60Hz: Fully Shielded Input Stage
Meets UL Std. 544 Leakage: 2µA rms max, @ 115V ac, 60Hz



Application

Multi-Channel Data Acquisition Systems
Current Shunt Measurements
Process Signal Isolator
High Voltage Instrumentation Amplifier
SCR Motor Control


Description

Model 289 is a wide-band, accurate, low cost isolation amplifier designed for instrumentation and industrial applications. Three accuracy selections are available offering guaranteed gain nonlinearity error at 10V p-p output: ±0.012% max (289L), ±0.025% max (289K), ±0.05% max (289J). All versions of the Model 289 provide a small signal frequency response from dc to 20kHz (3dB) and a large signal response from dc to 5kHz (full power) at a gain of 1V/V. This new design of Model 289 offers true 3-port isolation, ±2500V dc between inputs andoutputs (or power inputs), as well as 240V rms between power supply inputs and signal outputs. Using carrier modulation techniques with transformer isolation, model 289 interrupts ground loops and leakage paths and minimizes the effect of high voltage transients. It provides 120dB Common Mode Rejection between input and output common.The high CMV and CMR ratings of the model 289 facilitate accurate measurements in the presence of noisy electrical equipment such as motors and relays.