Low Cost, 4-Channel, 16-Bit 1 MSPS PulSAR ADC Enhanced Product AD7655-EP FEATURES FUNCTIONAL BLOCK DIAGRAM AVDD AGND REFGND REFx DVDD DGND 4-channel, 16-bit resolution ADC TRACK/HOLD OVDD 2 track-and-hold amplifiers 2 INA1 SERIAL OGND Throughput PORT INAN MUX 16 D 15:0 1 MSPS (normal mode) INA2 SWITCHED MUX A0 SER/PAR 888 kSPS (impulse mode) CAP DAC INB1 EOC Analog input voltage range: 0 V to 5 V INBN MUX BUSY INB2 No pipeline delay CLOCK PARALLEL CS PD INTERFACE Parallel and serial 5 V/3 V interface CONTROL LOGIC AND RD RESET CALIBRATION CIRCUITRY SPI/QSPI/MICROWIRE/DSP compatible A/B Single 5 V supply operation AD7655-EP BYTESWAP Power dissipation IMPULSE CNVST 120 mW typical Figure 1. 2.6 mW at 10 kSPS 48-lead frame chip scale package (LFCSP) Table 1. PulSAR Selection Pin-to-pin compatible with the AD7654 800 to Low cost Type/kSPS 100 to 250 500 to 570 1000 >1000 Pseudo AD7660/ AD7650/ Supports defense and aerospace applications (AQEC AD7653 Differential AD7661 AD7652 AD7667 standard) AD7664/ Military temperature range (55C to +125C) AD7666 Controlled manufacturing baseline True Bipolar AD7663 AD7665 AD7671 Product change notification True AD7675 AD7676 AD7677 AD7621 Differential AD7623 Qualification data available on request 18 Bit AD7678 AD7679 AD7674 AD7641 APPLICATIONS Multichannel/ AD7654 AD7655 Simultaneous AC motor control 3-phase power control power applications, a reduced power mode (impulse) where the 4-channel data acquisition power is scaled with the throughput. Operation is specified Uninterrupted power supplies from 55C to +125C. Communications Full details about this enhanced product are available in the GENERAL DESCRIPTION AD7655 data sheet, which should be consulted in conjunction with this data sheet. The AD7655-EP is a low cost, simultaneous sampling, dual- channel, 16-bit, charge redistribution SAR, analog-to-digital PRODUCT HIGHLIGHTS converter that operates from a single 5 V power supply. It 1. Multichannel ADC. contains two low noise, wide bandwidth, track-and-hold The AD7655-EP features 4-channel inputs with two sample- amplifiers that allow simultaneous sampling, a high speed and-hold circuits that allow simultaneous sampling. 16-bit sampling ADC, an internal conversion clock, error 2. Fast Throughput. correction circuits, and both serial and parallel system interface The AD7655-EP is a 1 MSPS, charge redistribution, 16-bit ports. Each track-and-hold has a multiplexer in front to provide SAR ADC with internal error correction circuitry. a 4-channel input ADC. The A0 multiplexer control input 3. Single-Supply Operation. allows the choice of simultaneously sampling input pairs The AD7655-EP operates from a single 5 V supply. In impulse INA1/INB1 (A0 = low) or INA2/ INB2 (A0 = high). The part mode, its power dissipation decreases with throughput. features a very high sampling rate mode (normal) and, for low 4. Serial or Parallel Interface. Versatile parallel or 2-wire serial interface arrangements are compatible with both 3 V and 5 V logic. Rev. B 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 20102018 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Technical Support www.analog.com Trademarks and registered trademarks are the property of their respective owners. 09230-001AD7655-EP Enhanced Product TABLE OF CONTENTS Features .............................................................................................. 1 Timing Specifications ...................................................................5 Applications ....................................................................................... 1 Absolute Maximum Ratings ............................................................7 General Description ......................................................................... 1 ESD Caution...................................................................................7 Functional Block Diagram .............................................................. 1 Pin Configurations and Function Descriptions ............................8 Product Highlights ........................................................................... 1 Outline Dimensions ....................................................................... 11 Revision History ............................................................................... 2 Ordering Guide .......................................................................... 12 Specifications ..................................................................................... 3 REVISION HISTORY 1/2018Rev. A to Rev. B Added CP-48-4 Package .................................................... Universal Change to General Description Section ........................................ 1 Added Figure 5 Renumbered Sequentially .................................. 8 Changes to Figure 4 and Table 6 ..................................................... 8 Updated Outline Dimensions ....................................................... 11 Changes to Ordering Guide .......................................................... 11 2/2011Rev. 0 to Rev. A Removed LQFP from Features Section ......................................... 1 Removed Internal Power Dissipation (700 mW) from Table 5 ..... 7 7/2010Revision 0: Initial Version Rev. B Page 2 of 12