16-Bit, 750 kSPS, Unipolar/Bipolar Programmable Input PulSAR ADC Data Sheet AD7612 FEATURES FUNCTIONAL BLOCK DIAGRAM Multiple pins/software programmable input ranges: TEMP REFBUFIN REF REFGND VCC VEE DVDD DGND 5 V, 10 V, 5 V, 10 V OVDD AGND AD7612 Pins or serial SPI-compatible input ranges/mode selection REF OGND AVDD AMP Throughput SERIAL DATA REF PDREF PORT 750 kSPS (warp mode) SERIAL PDBUF CONFIGURATION 600 kSPS (normal mode) 16 IN+ PORT SWITCHED D 15:0 CAP DAC 500 kSPS (impulse mode) IN SER/PAR INL: 0.75 LSB typical, 1.5 LSB maximum (23 ppm of FSR) BYTESWAP 16-bit resolution with no missing codes PARALLEL OB/2C CLOCK INTERFACE CNVST SNR: 92 minimum (5 V) 2 kHz, 94 dB typical (10 V) 2 kHz BUSY PD CONTROL LOGIC AND THD: 107 dB typical RD CALIBRATION CIRCUITRY RESET CS iCMOS process technology 5 V internal reference: typical drift 3 ppm/C TEMP output WARP IMPULSE BIPOLAR TEN No pipeline delay (SAR architecture) Figure 1. Parallel (16- or 8-bit bus) and serial 5 V/3.3 V interface SPI-/QSPI-/MICROWIRE-/DSP-compatible Table 1. 48-Lead 14-/16-/18-Bit PulSAR Selection Power dissipation: 190 mW 750 kSPS 100 kSPS to 500 kSPS to 800 kSPS to >1000 250 kSPS 570 kSPS 1000 kSPS kSPS Type Pb-free, 48-lead LQFP and LFCSP (7 mm 7 mm) packages Pseudo AD7651 AD7650 AD7653 APPLICATIONS Differential AD7660 AD7652 AD7667 AD7661 AD7664 Process control AD7666 Medical instruments True Bipolar AD7663 AD7665 AD7612 High speed data acquisition AD7671 Digital signal processing True AD7675 AD7676 AD7677 AD7621 Differential AD7622 Instrumentation AD7623 Spectrum analysis 18-Bit, True AD7678 AD7679 AD7674 AD7641 ATE Differential AD7643 GENERAL DESCRIPTION Multichannel/ AD7654 Simultaneous AD7655 The AD7612 is a 16-bit charge redistribution successive PRODUCT HIGHLIGHTS approximation register (SAR), architecture analog-to-digital 1. Programmable input range and mode selection. converter (ADC) fabricated on Analog Devices, Inc.s iCMOS Pins or serial port for selecting input range/mode select. high voltage process. The device is configured through hardware or via a dedicated write only serial configuration port for input 2. Fast throughput. range and operating mode. The AD7612 contains a high speed In warp mode, the AD7612 is 750 kSPS. 16-bit sampling ADC, an internal conversion clock, an internal 3. Superior Linearity. reference (and buffer), error correction circuits, and both serial No missing 16-bit code. 1.5 LSB max INL. and parallel system interface ports. A falling edge on CNVST 4. Internal Reference. samples the analog input on IN+ with respect to a ground 5 V internal reference with a typical drift of 3 ppm/C sense, IN. The AD7612 features four different analog input and an on-chip temperature sensor. ranges and three different sampling modes: warp mode for the fastest throughput, normal mode for the fastest asynchronous 5. Serial or Parallel Interface. throughput, and impulse mode where power consumption is Versatile parallel (16- or 8-bit bus) or 2-wire serial interface scaled linearly with throughput. Operation is specified from arrangement compatible with 3.3 V or 5 V logic. 40C to +85C. Rev. A 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 20062012 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. 06265-001AD7612 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Analog Inputs ............................................................................. 20 Applications ....................................................................................... 1 Driver Amplifier Choice ........................................................... 21 General Description ......................................................................... 1 Voltage Reference Input/Output .............................................. 21 Functional Block Diagram .............................................................. 1 Power Supplies ............................................................................ 22 Product Highlights ........................................................................... 1 Conversion Control ................................................................... 23 Revision History ............................................................................... 2 Interfaces.......................................................................................... 24 Specif icat ions ..................................................................................... 3 Digital Interface .......................................................................... 24 Timing Specifications .................................................................. 5 Parallel Interface ......................................................................... 24 Absolute Maximum Ratings ............................................................ 7 Serial Interface ............................................................................ 25 ESD Caution .................................................................................. 7 Master Serial Interface ............................................................... 25 Pin Configuration and Function Descriptions ............................. 8 Slave Serial Interface .................................................................. 27 Typical Performance Characteristics ........................................... 12 Hardware Configuration ........................................................... 29 Terminology .................................................................................... 16 Software Configuration ............................................................. 29 Theory of Operation ...................................................................... 17 Microprocessor Interfacing ....................................................... 30 O ver vie w ...................................................................................... 17 Application Information ................................................................ 31 Converter Operation .................................................................. 17 Layout Guidelines....................................................................... 31 Modes of Operation ................................................................... 18 Evaluating Performance ............................................................ 31 Transfer Functions...................................................................... 18 Outline Dimensions ....................................................................... 32 Typical Connection Diagram ................................................... 19 Ordering Guide .......................................................................... 32 REVISION HISTORY 12/12Rev. 0 to Rev. A Added Exposed Pad Note ................................................................ 8 Changes to Power Sequencing Section ........................................ 23 Updated Outline Dimensions ....................................................... 32 Changes to Ordering Guide .......................................................... 32 10/06Revision 0: Initial Version Rev. A Page 2 of 32