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Analog Devices AD204 - AD204 (Analog Devices) - Low Cost/ Miniature Isolation Amplifiers
| Наименование: | AD204 |
|---|---|
| Производитель: | Analog Devices |
| Файл: | AD204_Analog Devices.pdf |
| Скачать datasheet: |
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| Описание: | a FEATURES Small Size: 4 Channels/lnch Low Power: 35 mW (AD204) High Accuracy: В±0.025% max Nonlinearity (K Grade) High CMR: 130 dB (Gain = 100 V/V) Wide Bandwidth: 5 kHz Full-Power (AD204) High CMV Isolation: В±2000 V pk Continuous (K Grade) (Signal and Power) Isolated Power Outputs Uncommitted Input Amplifier APPLICATIONS Multichannel Data Acquisition Current Shunt Measurements Motor Controls Process Signal Isolation High Voltage Instrumentation Amplifier GENERAL DESCRIPTION FB IN– IN+ VSIG 2 4 3 1 Low Cost, Miniature Isolation Amplifiers AD202/AD204 FUNCTIONAL BLOCK DIAGRAM AD202 SIGNAL MOD В±5V FS +7.5V –7.5V RECT & FILTER 25kHz 25kHz POWER OSCILLATOR 31 +15V DC 32 POWER DEMOD В±5V F.S. 38 HI LO VOUT 37 IN COM +VISO OUT 6 –VISO OUT 5 RETURN ing. For applications requiring a low profile, the DIP package provides a height of just 0.350". High Accuracy: With a maximum nonlinearity of В± 0.025% for the AD202K/AD204K (В± 0.05% for the AD202J/AD204J) and low drift over temperature, the AD202 and AD204 provide high isolation without loss of signal integrity. Low Power: Power consumption of 35 mW (AD204) and 75 mW (AD202) over the full signal range makes these isolators ideal for use in applications with large channel counts or tight power budgets. Wide Bandwidth: The AD204’s full-power bandwidth of 5 kHz makes it useful for wideband signals. It is also effective in applications like control loops, where limited bandwidth could result in instability. Excellent Common-Mode Performance: The AD202K/ AD204K provide В± 2000 V pk continuous common-mode isolation, while the AD202J/AD204J provide В± 1000 V pk continuous common-mode isolation. All models have a total common-mode input capacitance of less than 5 pF inclusive of power isolation. This results in CMR ranging from 130 dB at a gain of 100 dB to 104 dB (minimum at unity gain) and very low leakage current (2 ВµA maximum). Flexible Input: An uncommitted op amp is provided at the input of all models. This provides buffering and gain as required, and facilitates many alternative input functions including filtering, summing, high-voltage ranges, and current (transimpedance) input. Isolated Power: The AD204 can supply isolated power of В± 7.5 V at 2 mA. This is sufficient to operate a low-drift input preamp, provide excitation to a semiconductor strain gage, or to power any of a wide range of user-supplied ancillary circuits. The AD202 can supply В± 7.5 V at 0.4 mA which is sufficient to operate adjustment networks or low-power references and op amps, or to provide an open-input alarm. The AD202 and AD204 are general purpose, two-port, transformer-coupled isolation amplifiers that may be used in a broad range of applications where input signals must be measured, processed and/or transmitted without a galvanic connection. These industry standard isolation amplifiers offer a complete isolation function, with both signal and power isolation provided for in a single compact plastic SIP or DIP style package. The primary distinction between the AD202 and the AD204 is that the AD202 is powered directly from a +15 V dc supply while the AD204 is powered by an externally supplied clock, such as the recommended AD246 Clock Driver. The AD202 and AD204 provide total galvanic isolation between the input and output stages of the isolation amplifier through the use of internal transformer-coupling. The functionally complete AD202 and AD204 eliminate the need for an external, user-supplied dc/dc converter. This permits the designer to minimize the necessary circuit overhead and consequently reduce the overall design and component costs. The design of the AD202 and AD204 emphasizes maximum flexibility and ease of use, including the availability of an uncommitted op amp on the input stage. They feature a bipolar В±5 V output range, an adjustable gain range of from 1 to 100 V/V, В± 0.025% max nonlinearity (K grade), 130 dB of CMR and the AD204 consumes a low 35 mW of power. PRODUCT HIGHLIGHTS The AD202 and AD204 are full-featured isolators offering numerous benefits to the user: Small Size: The AD202 and AD204 are available in SIP and DIP form packages. The SIP package is just 0.25" wide, giving the user a channel density of four channels per inch. The isolation barrier is positioned to maximize input to output spacREV. B Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices 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 Analog Devices. В© Analog Devices, Inc., 1994 One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A. Tel: 617/329-4700 Fax: 617/326-8703 AD202/AD204–SPECIFICATIONS(typical @ + 25В°C & V = +15 V unless otherwise noted) S Model GAIN Range Error vs. Temperature vs. Time vs. Supply Voltage Nonlinearity (G = 1 V/V)1 Nonlinearity vs. Isolated Supply Load INPUT VOLTAGE RATINGS Input Voltage Range Max lsolation Voltage (Input to Output) AC, 60 Hz, Continuous Continuous (AC and DC) Isolation-Mode Rejection Ratio (IMRR) @ 60 Hz RS ≤ 100 Ω (HI & LO lnputs) G = 1 V/V G = 100 V/V RS ≤ l kΩ (Input HI, LO, or Both) G = 1 V/V G = 100 V/V Leakage Current Input to Output @ (240 V rms, 60 Hz INPUT IMPEDANCE Differential (G = 1 V/V) Common Mode INPUT BIAS CURRENT Initial, @ +25В°C vs. Temperature (0В°C to +70В°C) INPUT DIFFERENCE CURRENT Initial, @ +25В°C vs. Temperature (0В°C to +70В°C) INPUT NOISE Voltage, 0.1 Hz to 100 Hz f > 200 Hz FREQUENCY RESPONSE Bandwidth (VO ≤ 10 V p-p, G = 1 V–50 V/V) Settling Time, to В± 10 mV (10 V Step) OFFSET VOLTAGE (RTI) Initial, @ +25В°C Adjustable to Zero vs . Temperature (0В°C to +70В°C) RATED OUTPUT Voltage (Out HI to Out LO) Voltage at Out HI or Out LO (Ref. Pin 32) Output Resistance Output Ripple, 100 kHz Bandwidth 5 kHz Bandwidth ISOLATED POWER OUTPUT2 Voltage, No Load Accuracy Current Regulation, No Load to Full Load Ripple OSCILLATOR DRIVE INPUT Input Voltage Input Frequency POWER SUPPLY (AD202 Only) Voltage, Rated Performance Voltage, Operating Current, No Load (VS = +15 V) TEMPERATURE RANGE Rated Performance Operating Storage PACKAGE DIMENSIONS4 SIP Package (Y) DlP Package (N) NOTES Specifications same as AD204J. 1 Nonlinearity is specified as a % deviation from a best straight line. 2 1.0 ВµF min decoupling required (see text). 3 3 mA with one supply loaded. 4 Width is 0.25" typ, o.26" max. Specifications subject to change without notice . AD204J 1 V/V–100 V/V В± 0.5% typ (В± 4% max) В± 20 ppm/В°C typ (В± 45 ppm/В°C max) В± 50 ppm/1000 Hours В± 0.01%/V В± 0.05% max В± 0.0015%/mA В±5 V 750 V rms В± 1000 V Peak 110 dB 130 dB 104 dB min 110 dB min 2 ВµA rms max 1012 Ω 2 GΩ 4.5 pF В± 30 pA В± 10 nA В± 5 pA В± 2 nA 4 ВµV p-p 50 nV/в€љHz 5 kHz 1 ms ( В± 15 В± 15/G)mV max пЈ« 10 пЈ¶ пЈ¬ В±10 В± G пЈ· ВµV/В°C пЈ пЈё AD204K * * * * В± 0.01%/V В± 0.025% max * * 1500 V rms В± 2000 V Peak 110 dB * 104 dB min * * * * * * * * * * 5 kHz * (В± 5 В± 5/G)mVmax AD202J * * * * В± 0.01%/V В± 0.05% max * * 750 V rms В± 1000 V Peak 105 dB * 100 dB min * * * * * * * * * * 2 kHz * AD202K * * * * В± 0.01%/V В± 0.025% max * * 1500 V rms В± 2000 V Peak 105 dB * 100 dB min * * * * * * * * * * 2 kHz * (В± 15 В± 15/G)mVmax (В± 5 В± 5/G)mVmax В±5 V В± 6.5 V 3 kΩ 10 mV pk-pk 0.5 mV rms В± 7.5 V В± 10% 2 mA (Either Output)3 5% 100 mV pk-pk 15 V pk-pk Nominal 25 kHz Nominal N/A N/A N/A 0В°C to +70В°C –40В°C to +85В°C –40В°C to +85В°C 2.08" Г— 0.250" Г— 0.625" 2.10" Г— 0.700" Г— 0.350" * * 3 kΩ * * * * 2 mA (Either Output)3 * * 15 V pk-pk Nominal 25 kHz Nominal N/A N/A N/A * * * * * * * 7 kΩ * * * * 400 ВµA Total * * N/A N/A +15 V В± 5% +15 V В± 10% 5 mA * * * * * * * 7 kΩ * * * * 400 ВµA Total * * N/A N/A +15 V В± 5% +15 V В± 10% 5 mA * * * * * –2– REV. B AD202/AD204 PIN DESIGNATIONS AD202/AD204 SIP Package AD246–SPECIFICATIONS (typical @ +25В°C & VS = +15 V unless otherwise noted) Model OUTPUTl Frequency Voltage Fan-Out POWER SUPPLY REQUIREMENTS Input Voltage Supply Current Unloaded Each AD204 Adds Each 1 mA Load on AD204 +VISO or –VISO Adds AD246JY AD246JN 25 kHz Nominal * 15 V p-p Nominal * 32 max * Pin 1 2 3 4 5 6 31 32 33 37 38 Function +INPUT INPUT/VISO COMMON –INPUT INPUT FEEDBACK –VISO OUTPUT +VISO OUTPUT +15 V POWER IN (AD202 ONLY) CLOCK/POWER COMMON CLOCK INPUT (AD204 ONLY) OUTPUT LO OUTPUT HI AD202/AD204 DIP Package +15 V В± 5% 35 mA 2.2 mA 0.7 mA * * * * Pin 1 2 3 18 19 20 21 22 36 37 38 Function +INPUT INPUT/VISO COMMON –INPUT OUTPUT LO OUTPUT HI +15 V POWER IN (AD202 ONLY) CLOCK INPUT (AD204 ONLY) CLOCK/POWER COMMON +VISO OUTPUT –VISO OUTPUT INPUT FEEDBACK NOTES *Specifications the same as the AD246JY. 1 The high current drive output will not support a short to ground. Specifications subject to change without notice. AD246 Pin Designations Pin (Y) 1 2 12 13 Pin (N) 12 1 14 24 Function +15 V POWER IN CLOCK OUTPUT COMMON COMMON ORDERING GUIDE Model AD202JY AD202KY AD202JN AD202KN AD204JY AD204KY AD204JN AD204KN Package Option SIP SIP DIP DIP SIP SIP DIP DIP Max CommonMode Voltage (Peak) 1000 V 2000 V 1000 V 2000 V 1000 V 2000 V 1000 V 2000 V Max Linearity В± 0.05% В± 0.025% В± 0.05% В± 0.025% В± 0.05% В± 0.025% В± 0.05% В± 0.025% CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the AD202/AD204 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality. WARNING! ESD SENSITIVE DEVICE REV. B –3– AD202/AD204 DIFFERENCES BETWEEN THE AD202 AND AD204 The primary distinction between the AD202 and AD |
