AD7658 250 kSPS, 6-Channel,SimultaneousSampling, Bipolar 12-Bit A/D Converter

Six 16-/14-/12-bit, 250 kSPS ADCs on board. Six true bipolar, high impedance analog inputs. Parallel and high speed serial interfaces. Applications

The AD7656/AD7657/AD7658 contain six 16-/14-/12-bit, fast, low power, successive approximation ADCs all in the one package that is 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 conventional CMOS processes, iCMOS components can accept bipolar input signals while providing increased performance, which dramatically reduces power consumption and package size.

The AD7656/AD7657/AD7658 feature throughput rates up to 250 kSPS. The parts contain low noise, wide bandwidth, track-and-hold amplifiers that can handle input frequencies up to 12 MHz.

The conversion process and data acquisition are controlled using CONVST signals and an internal oscillator. Three CONVST pins allow independent, simultaneous sampling of the three ADC pairs. The AD7656/AD7657/AD7658 all have a high speed parallel and serial interface, allowing the devices to interface with microprocessors or DSPs. In serial interface mode, the parts have a daisy-chain feature that allows multiple ADCs to connect to a single serial interface. The AD7656/ AD7657/AD7658 can accommodate true bipolar input signals in the ±4 × VREF range and ±2 × VREF range. The AD7656/ AD7657/AD7658 also contain an on-chip 2.5 V reference.

For reduced decoupling requirements visit the AD7658-1 product page.

Product Highlights

Applications

Features and Benefits
  • 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
  • Wide input bandwidth 86.5 dB SNR at 50 kHz input frequency
  • On-chip reference and reference buffers
  • Parallel, serial, and daisy-chain interface modes
  • High speed serial interface SPI®-/QSPI™-/MICROWIRE™-/DSP-compatible
  • Standby mode: 100 µW maximum
  • 64-lead LQFP
Analog to Digital Converters
Data Sheets
Documentnote
AD7656/AD7657/AD7658: 250 kSPS, 6-Channel, Simultaneous Sampling, Bipolar 16/14/12-Bit ADC Data Sheet (Rev. D)PDF 765 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-535: Evaluating the AD7656/AD7657/AD7658, 250 kSPS, 6-Channel, Simultaneous Sampling, Bipolar 16-/14-/12-Bit ADCsPDF 1388 kB
Order Information
Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
AD7658BSTZ Production64 ld LQFP (10x10mm)OTH 160-40 to 85C9.888.37Y
AD7658BSTZ-REEL Production64 ld LQFP (10x10mm)REEL 1500-40 to 85C08.37Y
AD7658YSTZ Production64 ld LQFP (10x10mm)OTH 160-40 to 125C11.479.72Y
Evaluation Boards
Part NumberDescriptionPriceRoHS
EVAL-AD7658SDZEvaluation Board-1Y
EVAL-SDP-CB1ZEvaluation Board99Y
Reference Materials
AD7656/AD7657/AD7658:250 kSPS、六通道、同步采样、双极性16/14/12位ADC (Rev. D) ad7656
AD7656/AD7657/AD7658: 250 kSPS, 6-Channel, Simultaneous Sampling, Bipolar 16/14/12-Bit ADC Data Sheet (Rev. D) 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-535: Evaluating the AD7656/AD7657/AD7658, 250 kSPS, 6-Channel, Simultaneous Sampling, Bipolar 16-/14-/12-Bit ADCs ad7656
MS-2210:高速ADC的电源设计 ad9861