AD7656-1 250 kSPS, 6-Channel, Simultaneous Sampling, Bipolar 16-Bit ADC

The AD7656-1/AD7657-1/AD7658-1 are reduced decoupling pin- and software-compatible versions of AD7656/AD7657/AD7658. The AD7656-1/AD7657-1/AD7658-1 devices contain six 16-/ 14-/12-bit, fast, low power successive approximation ADCs in a package designed on the iCMOS® process (industrial CMOS). 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 conven-tional CMOS processes, iCMOS components can accept bipolar input signals while providing increased performance, which dramatically reduces power consumption and package size.

The AD7656-1/AD7657-1/AD7658-1 feature throughput rates of up to 250 kSPS. The parts contain low noise, wide bandwidth track-and-hold amplifiers that can handle input frequencies up to 4.5 MHz. The conversion process and data acquisition are controlled using the CONVST signals and an internal oscillator. Three CONVST pins (CONVST A, CONVST B, and CONVST C) allow independent, simultaneous sampling of the three ADC pairs. The AD7656-1/AD7657-1/AD7658-1 have a high speed parallel and serial interface, allowing the devices to interface with microprocessors or DSPs. When the serial interface is selected, each part has a daisy-chain feature that allows multiple ADCs to connect to a single serial interface. The AD7656-1/AD7657-1/ AD7658-1 can accommodate true bipolar input signals in the ±4 × VREF and ±2 × VREF ranges. Each AD7656-1/AD7657-1/ AD7658-1 also contains an on-chip 2.5 V reference.

Please visit next generation product AD7606. Recommended for new designs is the AD7656A-1 pin for pin compatible device with improved PSS robustness.

Product Highlights
  • Six 16-/14-/12-bit, 250 kSPS ADCs on board.
  • Six true bipolar, high impedance analog inputs.
  • High speed parallel and serial interfaces.
  • Reduced decoupling requirements and reduced bill of materials cost compared with the AD7656/AD7657/ AD7658 devices.
Applications
  • Power line monitoring and measuring systems
  • Instrumentation and control systems
  • Multiaxis positioning systems
Features and Benefits
  • Pin and software compatible with AD7656/AD7657/AD7658 featuring reduced decoupling requirements
  • 6 independent ADCs
  • True bipolar analog inputs
  • Pin-/software-selectable ranges: ±10 V, ±5 V
  • Fast throughput rate: 250 kSPS
  • iCMOS process technology
  • Low power
    140 mW at 250 kSPS with 5 V supplies
  • See Data Sheet for Additional Information
Analog to Digital Converters
Aerospace and Defense
  • Solutions
Data Sheets
Documentnote
AD7656-1/AD7657-1/AD7658-1: 250 kSPS, 6-Channel, Simultaneous Sampling, Bipolar, 16-/14-/12-Bit ADC Data Sheet (Rev. D)PDF 861 kB
Application Notes
Documentnote
AN-931: Understanding PulSAR ADC Support Circuitry (Rev. 0)PDF 299 kB
AN-932: Power Supply Sequencing (Rev. 0)PDF 95 kB
AN-893: Configuring the AD7656/AD7657/AD7658 for Serial and Daisy-Chain Interface Modes of Operation (Rev. 0)PDF 133 kB
User Guides
Documentnote
UG-417: Evaluating the AD7656-1/AD7657-1/AD7658-1, 250 kSPS, 6-Channel, Simultaneous Sampling, Bipolar 16-/14-/12-Bit ADCsPDF 1618 kB
Order Information
Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
AD7656BSTZ-1 Production64 ld LQFP (10x10mm)OTH 160-40 to 85C14.6912.45Y
AD7656BSTZ-1-RL Production64 ld LQFP (10x10mm)REEL 1500-40 to 85C012.45Y
AD7656YSTZ-1 Production64 ld LQFP (10x10mm)OTH 160-40 to 125C15.2212.9Y
AD7656YSTZ-1-RL Last Time Buy64 ld LQFP (10x10mm)REEL 1500-40 to 125C012.9Y
Evaluation Boards
Part NumberDescriptionPriceRoHS
EVAL-AD7656-1SDZEvaluation Board99Y
EVAL-SDP-CB1ZEvaluation Controller Board99Y
Reference Materials
AD7656-1/AD7657-1/AD7658-1: 250 kSPS, 6-Channel, Simultaneous Sampling, Bipolar, 16-/14-/12-Bit ADC Data Sheet (Rev. D) ad7656-1
AD7656参考代码 ad7656
AN-931: Understanding PulSAR ADC Support Circuitry (Rev. 0) ad7476
AN-932: 电源时序控制 (Rev. 0) ad7628
AN-893: 将AD7656/AD7657/AD7658配置为串行和菊花链接口工作模式 ad7656
AN-931: 了解PulSAR ADC支持电路 (Rev. 0) ad7476
AN-932: Power Supply Sequencing (Rev. 0) ad7660
AN-893: Configuring the AD7656/AD7657/AD7658 for Serial and Daisy-Chain Interface Modes of Operation (Rev. 0) ad7656
UG-417: Evaluating the AD7656-1/AD7657-1/AD7658-1, 250 kSPS, 6-Channel, Simultaneous Sampling, Bipolar 16-/14-/12-Bit ADCs ad7656-1
MS-2210:高速ADC的电源设计 ad9861