AD7980:  16-Bit, 1 MSPS PulSAR® ADC in MSOP/QFN

The AD7980 is a 16-bit, successive approximation, analog-to-digital converter (ADC) that operates from a single power supply, VDD. It contains a low power, high speed, 16-bit sampling ADC and a ...More

ACE Awards, EE Times China

ACE Awards, EE Times China
2007 Product of the Year
Category: A/D D/A Converter ICs

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AD7980:  16-Bit, 1 MSPS PulSAR® ADC in MSOP/QFN

Product Description

The AD7980 is a 16-bit, successive approximation, analog-to-digital converter (ADC) that operates from a single power supply, VDD. It contains a low power, high speed, 16-bit sampling ADC and a versatile serial interface port. On the CNV rising edge, it samples an analog input IN+ between 0 V to REF with respect to a ground sense IN−. The reference voltage, REF, is applied externally and can be set independent of the supply voltage, VDD. Its power scales linearly with throughput.

The SPI-compatible serial interface also features the ability, using the SDI input, to daisy-chain several ADCs on a single, 3-wire bus and provides an optional busy indicator. It is compatible with 1.8 V, 2.5 V, 3 V, or 5 V logic, using the separate supply VIO.

The AD7980 is housed in a 10-lead MSOP or a 10-lead QFN (LFCSP) with operation specified from −40°C to +125°C.

Applications

  • Battery-powered equipment
  • Communications
  • ATE
  • Data acquisitions
  • Medical instruments

Data Sheet, Rev. A, 9/08

Features

  • 16-bit resolution with no missing codes
  • Throughput: 1 MSPS
  • Low power dissipation:
    7.0 mW @ 1 MSPS, 70 μW @ 10 kSPS
  • INL: ±0.6 LSB typical, ±1.25 LSB maximum
  • SINAD: 91.25 dB @ 10 kHz
  • THD: −110 dB @ 10 kHz
  • Pseudo differential analog input range
  • See data sheet for additional features

Diagrams

AD7980 Diagram
Functional Block Diagram for AD7980

Specifications

Resolution (Bits) 16bit
T-Put Rate 1MSPS
# Chan 1
Supply V Single(+2.5)
Pwr Diss (max) 10mW
Interface Ser,SPI
Ain Range Uni (Vref)
SNR (dB) 91dB
Pkg Type CSP,SOP

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Part# Res Throughput Rate # of Inputs Operating Pwr Diss
AD7980 16 1MSPS 1 10mW
AD7982 18 1MSPS 1 8.6mW
AD7450 12 1MSPS 1 1.3mW
AD7450A 12 1MSPS 1 9mW
AD7451 12 1MSPS 1 9.25mW
AD7440 10 1MSPS 1 9mW
AD7441 10 1MSPS 1 9.3mW