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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