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AD7655-EP Datasheet(PDF) 1 Page - Analog Devices |
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AD7655-EP Datasheet(HTML) 1 Page - Analog Devices |
1 / 12 page Low Cost, 4-Channel, 16-Bit 1 MSPS PulSAR ADC AD7655-EP Rev. A Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2010–2011 Analog Devices, Inc. All rights reserved. FEATURES 4-channel, 16-bit resolution ADC 2 track-and-hold amplifiers Throughput 1 MSPS (normal mode) 888 kSPS (impulse mode) Analog input voltage range: 0 V to 5 V No pipeline delay Parallel and serial 5 V/3 V interface SPI®/QSPI™/MICROWIRE™/DSP compatible Single 5 V supply operation Power dissipation 120 mW typical 2.6 mW @ 10 kSPS 48-lead frame chip scale package (LFCSP) Pin-to-pin compatible with the AD7654 Low cost Supports defense and aerospace applications (AQEC standard) Military temperature range (−55°C to +125°C) Controlled manufacturing baseline Enhanced product change notification Qualification data available on request APPLICATIONS AC motor control 3-phase power control 4-channel data acquisition Uninterrupted power supplies Communications GENERAL DESCRIPTION The AD7655-EP is a low cost, simultaneous sampling, dual- channel, 16-bit, charge redistribution SAR, analog-to-digital converter that operates from a single 5 V power supply. It contains two low noise, wide bandwidth, track-and-hold amplifiers that allow simultaneous sampling, a high speed 16-bit sampling ADC, an internal conversion clock, error correction circuits, and both serial and parallel system interface ports. Each track-and-hold has a multiplexer in front to provide a 4-channel input ADC. The A0 multiplexer control input allows the choice of simultaneously sampling input pairs INA1/INB1 (A0 = low) or INA2/ INB2 (A0 = high). The part features a very high sampling rate mode (normal) and, for low FUNCTIONAL BLOCK DIAGRAM CONTROL LOGIC AND CALIBRATION CIRCUITRY A/B 16 D[15:0] BUSY CS SER/PAR OGND OVDD DGND DVDD SERIAL PORT BYTESWAP RD AVDD AGND REFx REFGND PD RESET CNVST INAN SWITCHED CAP DAC AD7655-EP INA1 IMPULSE MUX EOC INA2 A0 INB1 INBN INB2 TRACK/HOLD ×2 PARALLEL INTERFACE CLOCK MUX MUX Figure 1. Table 1. PulSAR® Selection Type/kSPS 100 to 250 500 to 570 800 to 1000 >1000 Pseudo Differential AD7660/ AD7661 AD7650/ AD7652 AD7664/ AD7666 AD7653 AD7667 True Bipolar AD7663 AD7665 AD7671 True Differential AD7675 AD7676 AD7677 AD7621 AD7623 18 Bit AD7678 AD7679 AD7674 AD7641 Multichannel/ Simultaneous AD7654 AD7655 power applications, a reduced power mode (impulse) where the power is scaled with the throughput. Operation is specified from −55°C to +125°C. Full details about this enhanced product are available in the AD7655 data sheet, which should be consulted in conjunction with this data sheet. PRODUCT HIGHLIGHTS 1. Multichannel ADC. The AD7655-EP features 4-channel inputs with two sample- and-hold circuits that allow simultaneous sampling. 2. Fast Throughput. The AD7655-EP is a 1 MSPS, charge redistribution, 16-bit SAR ADC with internal error correction circuitry. 3. Single-Supply Operation. The AD7655-EP operates from a single 5 V supply. In impulse mode, its power dissipation decreases with throughput. 4. Serial or Parallel Interface. Versatile parallel or 2-wire serial interface arrangements are compatible with both 3 V and 5 V logic. |
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