High CMV, High Performance Isolation Amplifiers
Models 284J, 286J, 281
FEATURES High CMV Isolation: 5000V pk, 10ms Pulse; 2500V dc Continuous High CMR: 110dB min with 5k imbalance Low Nonlinearity: 0.05% @ 10V pk-pk Output High Gain Stability: 0.0075%/C, 0.001%/1000 hours Low Input Offset Voltage Drift: 10V/ C, G = 100V/V (Model 286J) Resistor Programmed Gain: 1 to 10V/V (284J) 1 to 100V/V (286J) Isolated Power Supply: 8.5V dc @ 5mA (284J) 15V dc @ 15mA (286J) Meets IEEE Std 472: Transient Protection (SWC) Meets UL Std 544 Leakage @ 115V ac, 60Hz: 2.0A max (284J) 2.5A max (286J) APPLICATIONS Fetal Heartbeat Monitoring Multi-Channel ECG Recording Ground Loop Elimination in Industrial and Process Control High Voltage Protection in Data Acquisition Systems 4-20mA Isolated Current Loop Receiver GENERAL DESCRIPTION The models 284J, 286J are low cost, high performance isolation amplifiers designed for high CMV isolation and low leakage in biomedical, industrial and data acquisition systems. Using modulation techniques with reliable transformer isolation, the models 284J, 286J protect both patients and ultrasensitive equipment from high CMV transients up to 5000V pk (10ms pulse) or 2500V dc continuous, high CMR of ll0dB (5k imbalance) and feature maximum leakage current of less than 3A rms, @ 115V ac, 60Hz (inputs to power common). The model 284J is a self-contained isolation amplifier for single channel applications. For multi-channel applications, the model 286J combined with an external synchronizing oscillator such as the model 281 may be used; up to 16 model 286J amplifiers can be driven from 1 model 281 oscillator. Additional channels may be obtained by configuring an unlimited number of 284Js with several ganged 281 oscillators. Both models also provide resistor-programmable gain of 1 to 10V/V (284J) or 1 to 100V/V (286J), high gain stability of 0.0075%/ C, low nonlinearity of 0.05% @ 10V pk-pk output and isolated power supply outputs of 15V dc @ 15mA (286J) or 8.5V dc @ 5mA (284J). WHERE TO USE MODELS 284J, 286J Industrial Applications: In data acquisition systems, computer interface systems, process signal isolators and high CMV instrumentation, models 284J, 286J offer complete galvanic isolation and protection against damage from transients and fault voltages. High level transducer interface capability is afforded
4 CHANNEL. ISOLATED DATA ACQUISITION SYSTEM
with model 286J's 20V pk-pk or model 284J's 10V pk-pk input signal range at a gain of 1V/V operation. In portable field designs, single supply, wide range operation (+8V to +16V) offers simple battery operation. Medical Applications: In biomedical and patient monitoring equipment such as multi-channel VCG, ECG, and polygraph recorders, models 284J, 286J offer protection from lethal ground fault currents as well as 5kV defibrillator pulse inputs. Low level bioelectric signal recording is achieved with low input noise (8V pk-pk @ G = max gain) and high CMR (110dB, min @ 60Hz). DESIGN FEATURES AND USER BENEFITS High Reliability: Models 284J, 286J are conservatively designed, compact modules, capable of reliable operation in harsh environments. Models 284J, 286J have calculated MTBF of over 390,000 hours and are designed to meet MIL-STD-202E environmental testing as well as the IEEE Standard for Transient Voltage Protection (472-1974: Surge Withstand Capability). Isolated Power Supply: Dual regulated supplies, completely isolated from the input power terminals (2500V dc isolation), provides the capability to excite floating signal conditioners, front end buffer amplifiers as well as remote transducers such as thermistors or bridges. Adjustable Gain: A single external resistor enables gain adjustment from 1V/V to 100V/V (286J) or 1V/V to 10V/V (284J) providing the flexibility of applying models 284J, 286J in both high level transducer interfacing as well as low level sensor measurements.
Information furnished by Intronics is believed to be accurate and reliable. However, no responsibility is assumed by Intronics for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intronics.
1400 Providence Highway, Building #2 Norwood, MA 02062 Phone (781) 551-5500 FAX (781) 551-5555 www.intronicspower.com
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