GENERAL DESCRIPTION

The AD7767/AD7767-1/AD7767-2 are high performance 24-bit oversampled SAR analog-to-digital converters (ADC). The AD7767/AD7767-1/AD7767-2 combine the benefits of a large dynamic range and input bandwidth, consuming 15 mW, 10.5 mW, and 8.5 mW power, respectively, all contained in a 16-lead TSSOP package.

FEATURES

Oversampled successive approximation (SAR) architecture

High performance ac and dc accuracy, low power

  115.5 dB dynamic range, 32 kSPS (AD7767-2)

  112.5 dB dynamic range, 64 kSPS (AD7767-1)

  109.5 dB dynamic range, 128 kSPS (AD7767)

  −118 dB THD

Exceptionally low power

  8.5 mW, 32 kSPS (AD7767-2)

  10.5 mW, 64 kSPS (AD7767-1)

  15 mW, 128 kSPS (AD7767)

High dc accuracy

  24 bits, no missing codes (NMC)

  INL: ±3 ppm (typical), ±7.6 ppm (maximum)

Low temperature drift

  Zero error drift: 15 nV/°C

  Gain error drift: 0.0075% FS

On-chip low-pass FIR filter

  Linear phase response

  Pass-band ripple: ±0.005 dB

  Stop-band attenuation: 100 dB

2.5 V supply with 1.8 V/2.5 V/3 V/3.6 V logic interface options

Flexible interfacing options

  Synchronization of multiple devices

  Daisy chain capability

  Power-down function

Temperature range: −40°C to +105°C

APPLICATIONS

Low power PCI/USB data acquisition systems

Low power wireless acquisition systems

Vibration analysis

Instrumentation

High precision medical acquisition