Analog Devices Inc. AD7986BCPZ

Description
The AD7986 is an 18-bit, 2 MSPS successive approximation analog-to-digital converter (ADC) with a low power, high-speed, 18-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 AD7986 samples the voltage difference between the IN and IN- pins. The voltages on these pins usually swing in opposite phases between 0 V and Ver. It features a very high sampling rate turbo mode (TURBO = high) and a reduced power normal mode (TURBO low) for low power applications where the power is scaled with the throughput.
In normal mode (TURBO = low), the SPI-compatible serial interface also features the ability, using the SDI input, to daisy-chain several ADCs on a single 3-wire bus and provide an optional busy indicator. It is compatible with 1.8 V, 2.5 V, and 2.7 V using the separate VIO supply.
The AD7986 is available in a 20-lead LFCSP (QFN) with operation specified from -40°C to 85°C.

Features
18-bit resolution with no missing codes
Throughput: 2 MSPS (TURBO=high), 1.5 MSPS (TURBO = low)
Low power dissipation
15 mW at 2 MSPS, with external reference
26 mW at 2 MSPS with internal reference
INL: ±1 LSB typical, ±2.5 LSB maximum
SNR
95.5 dB, with on-chip reference
97.0 dB, with external reference
4.096 V internal reference: typical drift of 10 ppm/°C
True differential analog input voltage range: ±Var0V to Ver with Ver 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
Data acquisition systems
Medical instruments
Seismic data acquisition systems