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AD7911:  2-CHANNEL, 2.35 V TO 5.25 V, 250 KSPS, 10-BIT A/D CONVERTER

The AD7911/AD7921 are 10-bit and 12-bit, high speed, low power, 2-channel, successive-approximation ADCs respectively. The parts operate from a single 2.35 V to 5.25 V power supply and feature throughput rates up to 250 kSPS. The parts contain a low-noise, wide bandwidth track/hold amplifier, which can handle input frequencies in excess of 6 MHz.

The conversion process and data ...More

AD7911:  2-CHANNEL, 2.35 V TO 5.25 V, 250 KSPS, 10-BIT A/D CONVERTER

Product Description

The AD7911/AD7921 are 10-bit and 12-bit, high speed, low power, 2-channel, successive-approximation ADCs respectively. The parts operate from a single 2.35 V to 5.25 V power supply and feature throughput rates up to 250 kSPS. The parts contain a low-noise, wide bandwidth track/hold amplifier, which can handle input frequencies in excess of 6 MHz.

The conversion process and data acquisition are controlled using CS and the serial clock, allowing the devices to interface with microprocessors or DSPs. The input signal is sampled on the falling edge of CS and the conversion is also initiated at this point. There are no pipeline delays associated with the part.

The channel to be converted is selected through the DIN pin and the mode of operation is controlled by CS. The serial data stream from the DOUT pin has a channel identifier bit, which provides information about the channel converted.

The AD7911/AD7921 use advanced design techniques to achieve very low power dissipation at high throughput rates.

The reference for the part is taken internally from VDD. This allows the widest dynamic input range to the ADC. Thus the analog input range for the part is 0 to VDD.

The conversion rate is determined by the SCLK.

RESOURCES & TOOLS

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  • Throughput Rate: 250 kSPS
  • Specified for VDD of 2.35 V to 5.25 V
  • Low Power: 4 mW typ at 250 kSPS with 3 V Supplies 13.5 mW typ at 250 kSPS with 5 V Supplies
  • Wide Input Bandwidth: 71.5 dB Minimum SNR at 100 kHz Input Frequency
  • No Pipeline Delays
  • Flexible Power/Serial Clock Speed Management
  • High Speed Serial Interface SPI®/QSPI™ /MICROWIRE™ /DSP Compatible
  • Standby Mode: 1 µA max
  • 8-Lead TSOT Package
  • 8-Lead MSOP Package
  • Resolution (Bits): 10bit
  • T-Put Rate: 250kSPS
  • # Chan: 2
  • Supply V: Single(+2.5),Single(+3),Single(+3.3),Single(+5)
  • Pwr Diss: 20mW
  • Interface: Ser,SPI
  • Ain Range: Uni Vdd
  • SNR (dB): n/a
  • Pkg Type: SOP,SOT

Functional Block Diagram for AD7911

AD7911 Diagram
Functional Block Diagram for AD7911

OF NOTE ...

For samples and technical information, please contact the ADC Development Group. Please include your name, company, address and a brief description of your application.

Pricing, Packaging & Availability

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*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.