500 kSPS, 8-Channel, Software-Selectable, True Bipolar Input, 12-Bit Plus Sign ADC Enhanced Product AD7327-EP FEATURES FUNCTIONAL BLOCK DIAGRAM V REFIN/OUT V 12-bit plus sign SAR ADC DD CC True bipolar input ranges AD7327-EP Software-selectable input ranges V 0 10 V, 5 V, 2.5 V, 0 V to +10 V IN 2.5V V 1 VREF IN 13-BIT 500 kSPS throughput rate V 2 I/P IN SUCCESSIVE T/H MUX APPROXIMATION 8 analog input channels with channel sequencer V 3 IN ADC V 4 IN Single-ended, true differential, and pseudo differential V 5 IN analog input capability V 6 TEMPERATURE IN INDICATOR V 7 IN High analog input impedance Low power: 18 mW DOUT SCLK CONTROL LOGIC Temperature indicator AND REGISTERS CS CHANNEL Full power signal bandwidth: 22 MHz SEQUENCER DIN Internal 2.5 V reference V High speed serial interface DRIVE Power-down modes AGND V DGND SS 20-lead TSSOP package Figure 1. iCMOS process technology ENHANCED PRODUCT FEATURES Supports defense and aerospace applications (AQEC standard) Military temperature range: 55C to +125C Controlled manufacturing baseline One assembly/test site The ADC contains a 2.5 V internal reference. The AD7327-EP One fabrication site also allows external reference operation. If a 3 V reference is Product change notification applied to the REFIN/OUT pin, the AD7327-EP can accept a Qualification data available on request true bipolar 12 V analog input. Minimum 12 V V and V DD SS GENERAL DESCRIPTION supplies are required for the 12 V input range. The ADC has a 1 high speed serial interface that can operate at throughput rates up The AD7327-EP is an 8-channel, 12-bit plus sign successive to 500 kSPS. approximation ADC designed on the iCMOS (industrial CMOS) process. It enables the development of a wide range of high The AD7327-EP is housed in a 20-lead TSSOP with operation performance analog ICs capable of 33 V operation in a footprint specified from 55C to +125C. Additional application and that no previous generation of high voltage devices achieved. technical information can be found in the AD7327 data sheet. Unlike analog ICs using conventional CMOS processes, iCMOS PRODUCT HIGHLIGHTS components can accept bipolar input signals while providing 1. The AD7327-EP can accept true bipolar analog input increased performance, dramatically reduced power consumption, signals, 10 V, 5 V, 2.5 V, and 0 V to +10 V (unipolar). and reduced package size. 2. The eight analog inputs can be configured as eight single- The AD7327-EP can accept true bipolar analog input signals, ended inputs, four true differential inputs, four pseudo software-selectable from 10 V, 5 V, 2.5 V, and 0 V to +10 V. differential inputs, or seven pseudo differential inputs. Each analog input channel can be independently programmed 3. 500 kSPS serial interface. SPI-/QSPI-/DSP-/MICROWIRE- to one of the four input ranges. The analog input channels on compatible interface. the AD7327-EP can be programmed to be single-ended, true 4. Low power, 18 mW, at a maximum throughput rate of differential, or pseudo differential. 500 kSPS. 5. Channel sequencer. 1 Protected by U.S. Patent No. 6,731,232. Rev. C 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 20142018 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. 12481-001AD7327-EP Enhanced Product TABLE OF CONTENTS Features .............................................................................................. 1 Absolute Maximum Ratings ............................................................8 Enhanced Product Features ............................................................ 1 ESD Caution...................................................................................8 General Description ......................................................................... 1 Pin Configuration and Function Descriptions ..............................9 Functional Block Diagram .............................................................. 1 Typical Performance Characteristics ........................................... 10 Product Highlights ........................................................................... 1 Outline Dimensions ....................................................................... 14 Revision History ............................................................................... 2 Ordering Guide .......................................................................... 14 Specif icat ions ..................................................................................... 3 Timing Specifications .................................................................. 7 REVISION HISTORY 4/2018Rev. B to Rev. C 10/2014Rev. 0 to Rev. A Changes to Features Section............................................................ 1 Changes to Operating Temperature Range, Table 3 ..................... 8 Changes to Ordering Guide .......................................................... 14 9/2014Revision 0: Initial Version 9/2015Rev. A to Rev. B Added Enhanced Product Features Section .................................. 1 Rev. C Page 2 of 14