Analog Devices Inc. AD7767BRUZ-2-RL7

Description
The AD7767/AD7767-1/AD7767-2 are high-performance, 24-bit, oversampled SAR analog-to-digital converters (ADCs). They combine a large dynamic range and input bandwidth while consuming low power (15 mW, 10.5 mW, and 8.5 mW, respectively). Packaged in a 16-lead TSSOP, these ADCs are ideal for ultralow power data acquisition systems, such as PCI- and USB-based systems.
The AD7767/AD7767-1/AD7767-2 provide 24-bit resolution with exceptional SNR, wide dynamic range, and outstanding dc accuracy. This makes them suitable for measuring small signal changes over a wide dynamic range, particularly in applications where small changes on the input are measured on larger ac or dc signals.
The ADCs include an on-board digital filter with a linear phase response that eliminates out-of-band noise by filtering the oversampled input voltage. The oversampled architecture also reduces front-end antialias requirements.
Other features include a SYNC/PD (synchronization/power-down) pin for synchronizing multiple AD7767 devices and an SDI pin for daisy chaining multiple devices.
The AD7767/AD7767-1/AD7767-2 operate from a 2.5 V supply using a 5 V reference and operate over a temperature range of -40°C to 105°C.

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: 0.4 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