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AD7656BST

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250 kSPS, 6-Channel,Simultaneous Sampling, Bipolar 12/14/16-Bit ADC

Manufacturer : Analog Devices, Inc
Package/Case : LQFP-64
Product Categories : Precision A/D Converters ; Simultaneous Sampling A/D Converters
Datasheet: AD7656BST Datasheet (PDF)
RoHs Status: Lead free / RoHS Compliant
In-stock: 72

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AD7656BST Product Details

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.

Please visit next generation productAD7606. Recommended for new designs is the AD7656A pin for pin compatible device with improved PSS robustness. For reduced decoupling requirements visit theAD7656-1 orAD7656A-1 product page.

Product Highlights

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

    • 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

    Applications

    • Power line monitoring systems
    • Instrumentation and control systems
    • Multi-axis positioning systems

    AD7656BST Pinout
    (Picture: Pinout)

    AD7656BST Block Diagram
    (Picture: Diagram)

    Technical Parameters

    • Channels
    • 6
    • Resolutionbits
    • 16
    • Sample Ratemax | SPS
    • 250k
    • ADC SNR in dBFStyp | dBFS
    • 86.5
    • INL in LSBtyp | LSBs
    • 1
    • Device Architecture
    • SAR
    • Input Type
    • Single-Ended
    • Data Output Interface
    • Parallel, Serial SPI
    • Powertyp | W
    • 143m

    AD7656BST Datasheet

    • AD7656 Technical Documentation/Data sheet

    AD7656BST Equivalent Parts

    For the AD7656BST component, you may consider these replacement and alternative parts.

    Models Manufacturer Package/Case Description
    AD7676AST ADI TQFP 16-Bit +-1 LSB INL, 500 kSPS, Differential ADC

    AD7656BST Related Products

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    Analog Devices, Inc

    ADI
    Analog Devices, Inc. was founded by two MIT graduates, Ray Stata and Matthew Lorber in 1965. The same year, the company released its first product, the model 101 op amp, which was a hockey-puck sized module used in test and measurement equipment. In 1967, the company published the first issue of its...
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