Overview

Features and Benefits

  • Fast throughput rate: 1 MSPS
  • Specified for AVDD of 2.7 V to 5.25 V
  • Low power:
    6 mW maximum at 1 MSPS with 3 V supplies
    13.5 mW maximum at 1 MSPS with 5 V supplies
  • 4 single-ended inputs with sequencer
  • Wide input bandwidth:
    AD7924, 70 dB SNR at 50 kHz input frequency
  • Flexible power/serial clock speed management
  • No pipeline delays
  • High speed serial interface: SPI/QSPI/ MICROWIRE/DSP compatible
  • Shutdown mode: 0.5 μA maximum
  • 16-lead TSSOP package
  • Qualified for automotive applications

Product Details

The AD7904 / AD7914 / AD7924 are, respectively, 8-bit, 10-bit, and 12-bit, high speed, low power, 4-channel successive approximation ADCs. The parts operate from a single 2.7 V to 5.25 V power supply and feature throughput rates up to 1 MSPS. The parts contain a low noise, wide bandwidth track-and-hold amplifier that can handle input frequencies in excess of 8 MHz.

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

The AD7904 / AD7914 / AD7924 use advanced design techniques to achieve very low power dissipation at maximum throughput rates. At maximum throughput rates, the AD7904 / AD7914 / AD7924 consume 2 mA maximum with 3 V supplies; with 5 V supplies, the current consumption is 2.7 mA maximum.

Through the configuration of the control register, the analog input range for the part can be selected as 0 V to REFIN or 0 V to 2 × REFIN, with either straight binary or twos complement output coding. The AD7904 / AD7914 / AD7924 each feature four single-ended analog inputs with a channel sequencer to allow a pre-programmed selection of channels to be converted sequentially.

The conversion time for the AD7904 / AD7914 / AD7924 is determined by the SCLK frequency, which is also used as the master clock to control the conversion.

PRODUCT HIGHLIGHTS

  1. High Throughput with Low Power Consumption.
    The AD7904/AD7914/AD7924 offer throughput rates up to 1 MSPS. At the maximum throughput rate with 3 V supplies, the AD7904/AD7914/AD7924 dissipate only 6 mW of power maximum.
  2. Four Single-Ended Inputs with Channel Sequencer.
    A consecutive sequence of channels can be selected, through which the ADC will cycle and convert on.
  3. Single-Supply Operation with VDRIVE Function.
    The AD7904/AD7914/AD7924 operate from a single 2.7 V to 5.25 V supply. The VDRIVE function allows the serial interface to connect directly to 3 V or 5 V processor systems, independent of VDD.
  4. Flexible Power/Serial Clock Speed Management.
    The conversion rate is determined by the serial clock, allowing the conversion time to be reduced by increasing the serial clock speed. The parts also feature two shutdown modes to maximize power efficiency at lower throughput rates. Current consumption is 0.5 µA maximum when in full shutdown.
  5. No Pipeline Delay.
    The parts feature a standard successive approximation ADC with accurate control of the sampling instant via the CS input and once-off conversion control.

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (1)

Product Recommendations

AD7904 Companion Parts

Recommended Precison References - 2.5V

  • For applications requiring the lowest noise performance and output trim adjust: ADR441.
  • For high output current applications: ADR431, REF192.
  • For wide supply applications: AD780.
  • For cost sensitive applications: AD1582, ADR391.

Recommended Input Buffer Amplifiers

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

PCN-PDN Information

Sample & Buy


See our Ordering FAQs for answers to questions about online orders, payment options and more.

 

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.

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.


Price Table Help