AD7476A:  12-Bit, 1 MSPS, Low-Power A/D Converter in SC70 and MSOP Packages

The AD7476A /AD7477A/ AD7478A are 12-bit, 10-bit and 8-bit high speed, low power, successive-approximation ADCs respectively. The parts operate from a single 2.35 V to 5.25 V power supply and feature ...More

The SC70 package is the latest breakthrough for small-size ADCs with resolutions up to 12 bits.

AD7476A:  12-Bit, 1 MSPS, Low-Power A/D Converter in SC70 and MSOP Packages

Product Description

The AD7476A /AD7477A/ AD7478A are 12-bit, 10-bit and 8-bit high speed, low power, 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 1 MSPS. The parts contain a low-noise, wide bandwidth track/hold amplifier, which can handle input frequencies in excess of 13 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 conversion is also initiated at this point. There are no pipeline delays associated with the part.

The AD7476A/AD7477A/AD7478A 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.

The AD7476A/AD7477A/AD7478A are a follow on from our standard AD7476/AD7477/AD7478, 1 MSPS ADCS. They are available in SC70 and MSOP packages.

Features

  • Fast Throughput Rate: 1 MSPS
  • Specified for VDD of 2.35 V to 5.25 V
  • Low Power:
    3.6 mW Typ at 1 MSPS with 3 V Supplies
    12.5 mW Typ at 1 MSPS with 5 V Supplies
  • Wide Input Bandwidth:
    71 dB SNR at 100 kHz Input Frequency
  • Flexible Power/Serial Clock Speed Management
  • No Pipeline Delays
  • High Speed Serial Interface
    SPI®/QSPI™/MicroWire™/DSP Compatible
  • Standby Mode: 1 µA Max
  • 6-Lead SC70 Package
  • 8-Lead MSOP Package

Diagrams

AD7476A Diagram
Functional Block Diagram for AD7476A

Specifications

Resolution (Bits) 12bit
T-Put Rate 1MSPS
# Chan 1
Supply V Single(+2.5),Single(+3),Single(+3.3),Single(+5)
Pwr Diss (max) 17.5mW
Interface Ser,SPI
Ain Range Uni Vdd
SNR (dB) 71dB
Pkg Type SC70,SOP

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Part# Res Throughput Rate # of Inputs Operating Pwr Diss
AD7450 12 1MSPS 1 1.3mW
AD7450A 12 1MSPS 1 9mW
AD7451 12 1MSPS 1 9.25mW
AD7472 12 1.5MSPS 1 12mW
AD7475 12 1MSPS 1 10.5mW
AD7476 12 1MSPS 1 17.5mW
AD7476A 12 1MSPS 1 17.5mW