Analog Devices Inc. AD7944BCPZ

Description
The AD7944 is a 14-bit, 2.5 MSPS successive approximation analog-to-digital converter (SAR ADC). It features a low power, high speed, 14-bit sampling ADC, an internal conversion clock, an internal reference (and buffer), error correction circuits, and a versatile serial interface port. On the rising edge of CNV, the AD7944 samples an analog input, IN , between 0 V and Ver with respect to a ground sense, IN-.

Features
14-bit resolution with no missing codes
Throughput: 2.5 MSPS (TURBO high), 2.0 MSPS (TURBO low)
Low power dissipation
15.5 mW at 2.5 MSPS, with external reference
28 mW at 2.5 MSPS, with internal reference
INL: 10.25 LSB typical, ±1.0 LSB maximum
SNR
84 dB, with on-chip reference
84.5 dB, with external reference
4.096 V internal reference: typical drift of ±10 ppm/°C
Pseudo differential analog input voltage range
0 V to VREE with VRCF up to 5.0 V
Allows use of any input range
No pipeline delay
Logic interface: 1.8 V/2.5 V/2.7 V
Serial interface: SPI-/QSPI-/MICROWIRE-/DSP-compatible
Ability to daisy-chain multiple ADCs with busy indicator
20-lead, 4 mm x 4 mm LFCSP (QFN)

Applications
Battery-powered equipment
Communications
ATE
Data acquisition systems
Medical instruments