120 kHz Bandwidth, Low Distortion, a Isolation Amplifier AD215 FEATURES FUNCTIONAL BLOCK DIAGRAM Isolation Voltage Rating: 1,500 V rms Wide Bandwidth: 120 kHz, Full Power (3 dB) FB 4 AD215 Rapid Slew Rate: 6 V/ms UNCOMMITTED INPUT OP AMP SIGNAL Fast Settling Time: 9 ms RR 3 IN 38 OUT HI LOW-PASS 1 Low Harmonic Distortion: 80 dB 1 kHz IN+ MODULATOR DEMODULATOR FILTER 150kHz Low Nonlinearity: 60.005% IN COM 2 T1 OUTPUT BUFFER Wide Output Range: 610 V, min (Buffered) 36 TRIM Built-in Isolated Power Supply: 615 V dc 610 mA 33k 0.01F Performance Rated over 408C to +858C 37 OUT LO POWER +V 6 42 +15V ISO IN APPLICATIONS INCLUDE 430kHz ISOLATED DC POWER 44 15V IN High Speed Data Acquisition Systems OSCILLATOR V SUPPLY 5 43 ISO PWR RTN T2 Power Line and Transient Monitors Multichannel Muxed Input Isolation Waveform Recording Instrumentation Power Supply Controls Vibration Analysis Flexible Input and Buffered Output Stages: An uncommit- GENERAL DESCRIPTION ted op amp is provided on the input stage of the AD215 to The AD215 is a high speed input isolation amplifier designed to allow for input buffering or amplification and signal condition- isolate and amplify wide bandwidth analog signals. The innova- ing. The AD215 also features a buffered output stage to drive tive circuit and transformer design of the AD215 ensures wide- low impedance loads and an output voltage trim for zeroing the band dynamic characteristics while preserving key dc performance output offset where needed. specifications. High Accuracy: The AD215 has a typical nonlinearity of The AD215 provides complete galvanic isolation between the 0.005% (B grade) of full-scale range and the total harmonic input and output of the device including the user-available distortion is typically 80 dB at 1 kHz. The AD215 provides front-end isolated power supplies. The functionally complete designers with complete isolation of the desired signal without design, powered by a 15 V dc supply, eliminates the need for a loss of signal integrity or quality. user supplied isolated dc/dc converter. This permits the designer to minimize circuit overhead and reduce overall system design Excellent Common-Mode Performance: The AD215BY complexity and component costs. (AD215AY) provides 1,500 V rms (750 V rms) common-mode voltage protection from its input to output. Both grades feature The design of the AD215 emphasizes maximum flexibility and a low common-mode capacitance of 4.5 pF inclusive of the ease of use in a broad range of applications where fast analog dc/dc power isolation. This results in a typical common-mode signals must be measured under high common-mode voltage rejection specification of 105 dB and a low leakage current of (CMV) conditions. The AD215 has a 10 V input/output 2.0 A rms max (240 V rms, 60 Hz). range, a specified gain range of 1 V/V to 10 V/V, a buffered out- put with offset trim and a user-available isolated front-end Isolated Power: An unregulated isolated power supply of power supply which produces 15 V dc at 10 mA. 15 V dc 10 mA is available at the isolated input port of the AD215. This permits the use of ancillary isolated front-end PRODUCT HIGHLIGHTS amplifiers or signal conditioning components without the need High Speed Dynamic Characteristics: The AD215 features for a separate dc/dc supply. Even the excitation of transducers a typical full-power bandwidth of 120 kHz (100 kHz min), rise can be accomplished in most applications. time of 3 s and settling time of 9 s. The high speed perfor- Rated Performance over the 408C to +858C Temperature mance of the AD215 allows for unsurpassed galvanic isolation Range: With an extended industrial temperature range rating, of virtually any wideband dynamic signal. the AD215 is an ideal isolation solution for use in many indus- trial environments. REV. 0 Information furnished by Analog Devices is believed to be accurate and Analog Devices, Inc., 1996 reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Tel: 617/329-4700 Fax: 617/326-8703(Typical +258C, V = 615 V dc, 2 kV output load, unless otherwise noted.) AD215SPECIFICATIONS S AD215AY/BY Parameter Conditions Min Typ Max Units GAIN 1 Range 1 10 V/V Error G = 1 V/V, No Load on V 0.5 2% ISO vs. Temperature 0C to +85C +15 ppm/C 40C to 0C +50 ppm/C vs. Supply Voltage (14.5 V dc to 16.5 V dc) +100 ppm/V 2 vs. Isolated Supply Load +20 ppm/mA 3 Nonlinearity AD215BY Grade 10 V Output Swing, G = 1 V/V 0.005 0.015 % 10 V Output Swing, G = 10 V/V 0.01 % AD215AY Grade 10 V Output Swing, G = 1 V/V 0.01 0.025 % 10 V Output Swing, G = 10 V/V 0.025 % INPUT VOLTAGE RATINGS Input Voltage Rating G = 1 V/V 10 V Maximum Safe Differential Range IN+ or IN, to IN COM 15 V CMRR of Input Op Amp 100 dB 4 Isolation Voltage Rating Input to Output, AC, 60 Hz 4 AD215BY Grade 100% Tested 1500 V rms 4 AD215AY Grade 100% Tested 750 V rms IMRR (Isolation Mode Rejection Ratio) R 100 (IN+ & IN), G = 1 V/V, 60 Hz 120 dB S R 100 (IN+ & IN), G = 1 V/V, 1 kHz 100 dB S R 100 (IN+ & IN), G = 1 V/V, 10 kHz 80 dB S R 1 k (IN+ & IN), G = 1 V/V, 60 Hz 105 dB S R 1 k (IN+ & IN), G = 1 V/V, 1 kHz 85 dB S R 1 k (IN+ & IN), G = 1 V/V, 10 kHz 65 dB S Leakage Current, Input to Output 240 V rms, 60 Hz 2 A rms INPUT IMPEDANCE Differential G = 1 V/V 16 M Common Mode 2i4.5 GipF INPUT OFFSET VOLTAGE Initial +25C 0.4 2.0 mV vs. Temperature 0C to +85C 2 V/C 40C to 0C 20 V/C OUTPUT OFFSET VOLTAGE Initial +25C, Trimmable to Zero 0 35 80 mV vs. Temperature 0C to +85C 30 V/C 40C to 0C 80 V/C vs. Supply Voltage 350 V/V 2 vs. Isolated Supply Load 35 V/mA INPUT BIAS CURRENT Initial +25C 300 nA vs. Temperature 40C to +85C 400 nA INPUT DIFFERENCE CURRENT Initial +25C 3nA vs. Temperature 40C to +85C 40 nA INPUT VOLTAGE NOISE Input Voltage Noise Frequency > 10 Hz 20 nV/Hz DYNAMIC RESPONSE (2 k Load) Full Signal Bandwidth (3 dB) G = 1 V/V, 20 V pk-pk Signal 100 120 kHz 6 Transport Delay 2.2 s Slew Rate 10 V Output Swing 6 V/s Rise Time 10% to 90%, 10 V Output Swing 3 s 2 REV. 0