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AD7357:  Differential Input, Dual, Simultaneous Sampling, 4.25 MSPS, 14-Bit, SAR ADC

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 up to 4.25 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 ...More

AD7357:  Differential Input, Dual, Simultaneous Sampling, 4.25 MSPS, 14-Bit, SAR ADC

Product Description

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 up to 4.25 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 2.5 V supply and a 4.25 MSPS throughput rate, the part 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 part 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).

*Protected by U.S. Patent No. 6,681,332

Product Highlights

  1. Two Complete ADC 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 4.25 MSPS throughput rate with 36 mW power consumption.
  3. The part features two standard successive approximation ADCs with accurate control of the sampling instant via a CS input and once off conversion control.

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EVALUATION BOARDS & DEVELOPMENT KITS

  • 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 operation
  • 16-lead TSSOP package
  • Resolution (Bits): 14bit
  • T-Put Rate: 4.25MSPS
  • # Chan: 2
  • Supply V: Multi(+2.5, +3),Multi(+2.5, +3.3),Single(+2.5)
  • Pwr Diss: 36mW
  • Interface: Ser,SPI
  • Ain Range: Vcm ± Vref/2
  • SNR (dB): 76.5dB
  • Pkg Type: SOP

Functional Block Diagram for AD7357

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Part# Bits Throughput Rate # of Inputs Operating Pwr Diss
AD7357 14 4.25MSPS 2 36mW
AD9251-20 14 20MSPS 2 86.5mW
AD9251-40 14 40MSPS 2 124mW
AD9251-65 14 65MSPS 2 176.7mW
AD9251-80 14 80MSPS 2 209mW
AD9248-20 14 20MSPS 2 217mW
AD9640-80 14 80MSPS 2 550mW
AD9248-65 14 65MSPS 2 700mW
AD9640-105 14 105MSPS 2 730mW
AD9640-125 14 125MSPS 2 910mW
AD9640-150 14 150MSPS 2 1W
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Pricing, Packaging & Availability

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Model
The model number is a specific version of a generic that can be purchased or sampled.

Status
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  • Pre-Release: The model has not been released to general production, but samples may be available.
  • Production: The model is currently being produced, and generally available for purchase and sampling.
  • Last Time Buy: The model has been scheduled for obsolescence, but may still be purchased for a limited time.
  • Obsolete: The specific part is obsolete and no longer available. Other models listed in the table may still be available (if they have a status that is not obsolete).
Package Description
The package for this IC (i.e. DIP, SOIC, BGA). An Evaluation Board is a board engineered to show the performance of the model, the part is included on the board.

For detailed drawings and chemical composition please consult our  Package Site

Pin Count
Pin Count is the number of pins, balls, or pads on the device. Pin-out diagrams & pin function descriptions may be found in the datasheet.

Temperature Range
This is the acceptable operating range of the device. The various ranges specified are as follows:
  • Commercial: 0 to +70 degrees Celsius
  • Military : -55 to +125 degrees Celsius
  • Industrial: Temperature ranges may vary by model. Please consult the datasheet for more information.
  • Automotive: -40 to +125 degrees Celsius
Price
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

Production Availability
This is the date Analog Devices, Inc. anticipates that the product will ship from the warehouse. Most orders ship within 48 hours of this date.Once an order has been placed, Analog Devices, Inc. will send an Order Acknowledgement email to confirm your delivery date. It is important to note the scheduled dock date on the order entry screen. We do take orders for items that are not in stock, so delivery may be scheduled at a future date. Also, please note the warehouse location for the product ordered. We have warehouses in the United States, Europe and Southeast Asia. Transit times from these sites may vary.
Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.

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Due to environmental concerns, ADI offers many of our products in lead-free versions. For more information about lead-free parts, please consult our Pb (Lead) free information page.

View PCN
This is the list of Product Change Notifications (PCN) published on the web for this model. Click on the link to access PCN Information.Only select pre-2009 PCN�s are available on-line. To obtain a pre-2009 PCN, contact your ADI Sales Rep. For more information on ADI's PCN process, please visit our PCN Policy Statement page

*The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
**Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.