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The AD7767BRUZ-2 are high performance 24-bit oversampling SAR ADCs (analogue-to-digital converters). The device features wide dynamic range and input bandwidth with power consumption of only 15 mW, 10.5 mW and 8.5 mW, respectively, in a 16-pin TSSOP package.   

The AD7767BRUZ-2 is suitable for ultra-low-power data acquisition applications such as PCI and USB-based systems. With 24-bit resolution, excellent signal-to-noise ratio (SNR), wide dynamic range, and high DC accuracy, these devices are ideally suited for applications that measure small-signal variations over a wide dynamic range. In such applications, these devices are capable of accurately acquiring both AC and DC information.

The AD7767BRUZ-2's on-chip integrated digital filters (including linear phase response) eliminate out-of-band noise by oversampling the inputs. This oversampling architecture also reduces the need for front-end anti-alias filtering.The AD7767 also features a SYNC/PD (Sync/Power-Down) pin that can be used for synchronisation between multiple AD7767 devices. In addition, the SDI pin enables daisy-chaining of multiple AD7767 devices.

The AD7767BRUZ-2 operates from a 2.5 V supply based on a 5 V reference voltage over the -40°C to +105°C temperature range.

Product Characteristics

Oversampling successive approximation architecture

High-performance AC and DC accuracy, low power consumption

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

Total harmonic distortion: -118 dB

Very low power consumption

8.5 mW, 32 kSPS (AD7767-2)

High DC accuracy

24-bit, non-missing code (NMC)

Integral nonlinearity: ±3 ppm (typical), ±7.6 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

Passband ripple: ±0.005 dB

Stopband attenuation: 100 dB

2.5 V supply supporting 1.8 V/2.5 V/3 V/3.6 V logic interface

Flexible interface options

Multi-device synchronisation

Daisy chain interconnect capability

Power-saving features

Temperature range: -40°C to +105°C

Typical Applications

Low-power PCI/USB data acquisition systems

Low-power wireless acquisition systems

Vibration analysis

Instrumentation

High Precision Medical Acquisition

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