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AD7655ASTZRL Arkusz danych(PDF) 1 Page - Analog Devices |
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AD7655ASTZRL Arkusz danych(HTML) 1 Page - Analog Devices |
1 / 27 page Low Cost, 4-Channel, 16-Bit, 500 kSPS PulSAR ADC Data Sheet AD7655 Rev. E Document Feedback 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 that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property oftheir respective owners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 ©2002–2016 Analog Devices, Inc. All rights reserved. Technica l Support www.analog.com FEATURES 4-channel, 16-bit resolution ADC 2 track-and-hold amplifiers Throughput 500 kSPS (normal mode) 444 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 at 10 kSPS Package 48-lead quad flat package (LQFP) 48-lead frame chip scale package (LFCSP) Pin-to-pin compatible with the AD7654 Low cost APPLICATIONS AC motor control 3-phase power control 4-channel data acquisition Uninterrupted power supplies Communications GENERAL DESCRIPTION The AD7655 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 power applications, a reduced power mode (impulse) where the power is scaled with the throughput. Operation is specified from −40°C to +85°C. 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 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 AD7653 AD7664/ AD7666 AD7667 True Bipolar AD7663 AD7665 AD7671 True Differential AD7675 AD7676 AD7677 AD7621 AD7623 18 Bit AD7678 AD7679 AD7674 AD7641 Multichannel/ Simultaneous AD7654/ AD7655 PRODUCT HIGHLIGHTS 1. Multichannel ADC. The AD7655 features 4-channel inputs with two sample-and-hold circuits that allow simultaneous sampling. 2. Fast Throughput. The AD7655 is a 500 kSPS, charge redistribution, 16-bit SAR ADC with internal error correction circuitry. 3. Single-Supply Operation. The AD7655 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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