AD7328 Software Selectable, True Bipolar Input, 8-Channel, 12-Bit Plus Sign A/D Converter

The AD7328 can accept true bipolar analog input signals, ±10 V, ±5 V, ±2.5 V, and 0 V to +10 V unipolar signals The eight analog inputs can be configured as eight single-ended inputs, four true differential input pairs, four pseudo differential inputs, or seven pseudo differential inputs 1 MSPS serial interface. SPI®-/QSPI™-/DSP-/MICROWIRE™-compatible interface Low power, 30 mW, at a maximum throughput rate of 1 MSPS Channel sequencer

The AD7328 is an 8-channel, 12-bit plus sign, successive approximation ADC designed on the iCMOS (industrial CMOS) process. iCMOS is a process combining high voltage silicon with submicron CMOS and complementary bipolar technologies. It enables the development of a wide range of high performance analog ICs capable of 33 V operation in a footprint that no previous generation of high voltage parts could achieve. Unlike analog ICs using conventional CMOS processes, iCMOS components can accept bipolar input signals while providing increased performance, dramatically reduced power consumption, and reduced package size.

The AD7328 can accept true bipolar analog input signals. The AD7328 has four software-selectable input ranges, ±10 V, ±5 V, ±2.5 V, and 0 V to +10 V. Each analog input channel can be independently programmed to one of the four input ranges. The analog input channels on the AD7328 can be programmed to be single-ended, true differential, or pseudo differential.

The ADC contains a 2.5 V internal reference. The AD7328 also allows for external reference operation. If a 3 V reference is applied to the REFIN/OUT pin, the AD7328 can accept a true bipolar ±12 V analog input. Minimum ±12 V VDD and VSS supplies are required for the ±12 V input range. The ADC has a high speed serial interface that can operate at throughput rates up to 1 MSPS.

Product Highlights

Features and Benefits
  • 12-Bit plus Sign SAR ADC
  • True Bipolar Input Ranges
  • Software Selectable Input Ranges: ± 10V, ± 5V, ± 2.5V, 0 to 10V
  • Eight Analog Input Channels with Channel Sequencer
  • Single Ended, True Differential and Pseudo Differential Analog Input Capability
  • High Analog Input Impedance
  • Low Power: 26 mW
  • Full Power Signal Bandwidth: >13 MHz
  • Internal 2.5 V Reference
  • High Speed Serial Interface - 1 MSPS Throughput
  • For four and two channel equivalent devices, see AD7324, AD7322
Analog to Digital Converters
Software & Systems Requirements
Data Sheets
Documentnote
AD7328: 8-Channel, Software-Selectable,True Bipolar Input, 12-Bit Plus Sign ADC Data Sheet (Rev. C)PDF 873 kB
User Guides
Documentnote
UG-419: Evaluating the AD7327/AD7328PDF 1634 kB
Order Information
Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
AD7328BRUZ Production20 ld TSSOPOTH 75-40 to 85C7.446.33Y
AD7328BRUZ-REEL Production20 ld TSSOPREEL 2500-40 to 85C06.33Y
AD7328BRUZ-REEL7 Production20 ld TSSOPREEL 1000-40 to 85C06.33Y
Evaluation Boards
Part NumberDescriptionPriceRoHS
EVAL-AD7328SDZEvaluation Board59Y
EVAL-SDP-CB1ZEvaluation Controller Board99Y
Reference Materials
AD7328: 8-Channel, Software-Selectable,True Bipolar Input, 12-Bit Plus Sign ADC Data Sheet (Rev. C) ad7328
UG-419: Evaluating the AD7327/AD7328 ad7328
CN-0047: Using the AD7328 8-Channel ADC in Applications with Single-Ended... ad7328
MS-2210:高速ADC的电源设计 ad9861