GENERAL DESCRIPTION

The AD7766/AD7766-1/AD7766-2 are high performance, 24-bit, oversampled SAR analog-to-digital converters (ADCs). The AD7766/AD7766-1/AD7766-2 combine the benefits of a large dynamic range and input bandwidth, consuming 15 mW, 10.5 mW, and 8.5 mW power, respectively, and are 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 (AD7766-2)

112.5 dB dynamic range, 64 kSPS (AD7766-1)

109.5 dB dynamic range, 128 kSPS (AD7766)

−112 dB THD

Exceptionally low power

8.5 mW, 32 kSPS (AD7766-2)

10.5 mW, 64 kSPS (AD7766-1)

15 mW, 128 kSPS (AD7766)

High dc accuracy

24 bits, no missing codes (NMC)

INL: ±6 ppm (typical), ±15 ppm (maximum)

Low temperature drift

Zero error drift: 15 nV/°C

Gain error drift: 0.4 ppm/°C

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