AD7357

PRODUCTION

Differential Input, Dual, Simultaneous Sampling, 4.25 MSPS, 14-Bit, SAR ADC

Data Sheet (Rev. E) Product Selection Table
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Overview

  • Dual 14-bit SAR ADC
  • Simultaneous sampling
  • Throughput rate: 4.2 MSPS per channel
  • Specified for VDD of 2.5 V
  • Power dissipation: 36 mW at 4.25 MSPS
  • On-chip reference: 2.048 V ± 0.25%, 6 ppm/°C
  • Dual conversion with read
  • High speed serial interface: SPI®-/QSPI™-/MICROWIRE™-/DSP-compatible
  • −40°C to +125°C Y grade operation, −40°C to +85°C B grade operation
  • 16-lead TSSOP and 18-lead LFCSP packages
  • Qualified for automotive applications

The AD7357 is a dual, 14-bit, high speed, low power, successive approximation ADC that operates from a single 2.5 V power supply and features throughput rates of up to 4.2 MSPS. The part contains two ADCs, each preceded by a low noise, wide bandwidth track-and-hold circuit that can handle input frequencies in excess of 110 MHz.

The conversion process and data acquisition use standard control inputs allowing for easy interfacing to microprocessors or DSPs. The input signal is sampled on the falling edge of CS; conversion is also initiated at this point. The conversion time is determined by the SCLK frequency.

The AD7357 uses advanced design techniques to achieve very low power dissipation at high throughput rates. With a 2.5 V supply and a 4.2 MSPS throughput rate, the device consumes 14 mA typically. The part also offers flexible power/throughput rate management when operating in normal mode as the quiescent current consumption is so low.

The analog input range for the device is the differential common mode ±VREF/2. The AD7357 has an on-chip 2.048 V reference that can be overdriven when an external reference is preferred.

The AD7357 is available in a 16-lead thin shrink small outline package (TSSOP) and an 18-lead lead frame chip scale package (LFCSP).

PRODUCT HIGHLIGHTS

  1. Two Complete ADC Functions.
    These functions allow simultaneous sampling and conversion of two channels. The conversion result of both channels is simultaneously available on separate data lines or in succession on one data line if only one serial port is available.
  2. High Throughput with Low Power Consumption. 
    The AD7357 offers a 4.2 MSPS throughput rate with 36 mW power consumption.
  3. Simultaneous Sampling.
    The part features two standard successive approximation ADCs with accurate control of the sampling instant via a CS input and once off conversion control.

APPLICATIONS

  • Automotive radar
  • Data acquisition systems
  • Motion control
  • I and Q demodulation
  • RFID readers
AD7357
Differential Input, Dual, Simultaneous Sampling, 4.25 MSPS, 14-Bit, SAR ADC
AD7357 Functional Block Diagram AD7357 Pin Configuration
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Documentation

Data Sheet 1

Application Note 1

Technical Articles 2

Evaluation Design File 1

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Software Resources

Evaluation Software 1

AD7352/AD7356/AD7357 Evaluation Software

 

Hardware Ecosystem

Parts Product Life Cycle Description
AD7380
PRODUCTION 4MSPS Dual Simultaneous Sampling, 16-BIT SAR ADC, Differential Input
AD7381
PRODUCTION 4MSPS Dual Simultaneous Sampling, 14-BIT SAR ADC, Differential Input
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Tools & Simulations

AD7357 IBIS Models 2

Evaluation Kits

EVAL-AD7357

AD7357 Evaluation Board

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Product Details

The EVAL-AD7357EDZ is a fully featured evaluation kit for the AD7357. This board operates in standalone mode or in conjunction with the converter evaluation and development board, EVAL-CED1Z . When operated with the converter evaluation and development board, software is provided enabling the user to perform detailed analysis of the ADC's performance. This software includes the technical note describing the operation and set up of the evaluation board in standalone operation or when operated with the converter evaluation and development board.
EVAL-AD7357
AD7357 Evaluation Board

Latest Discussions

19 Weeks Ago
Clarification on Mid-Scale Error Notation in AD7357 Datasheet
19 Weeks Ago
Clarification on Full-Scale Error and Internal Reference Accuracy on AD7357
2 Years Ago
Reliability Handbook
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