GENERAL DESCRIPTION
The AD7693 is a 16-bit, successive approximation, analog-to digital converter (ADC) that operates from a single power supply, VDD. It contains a low power, high speed, 16-bit sampling ADC with no missing codes, an internal conversion clock, and a versatile serial interface port. On the CNV rising edge, it samples the voltage difference between the IN+ and IN− pins. The voltages on these pins swing in opposite phase between 0 V and REF. The reference voltage, REF, is applied externally and can be set up to the supply voltage, VDD.

FEATURES
16-bit resolution with no missing codes
Throughput: 500 kSPS
INL: +/-0.25 LSB typical, ±0.65 LSB max (±10 ppm of FSR)
Dynamic range: 96.5 dB typical @ 500 kSPS
SINAD: 96 dB typical @ 1 kHz, REF = 5V
THD: −120 dB typical @ 1 kHz. REF = 5V
True differential analog input range: ±VREF
   0 V to VREF with VREF up to VDDon both inputs
No pipeline delay
Single-supply 5 V operation with
   1.8 V/2.5 V/3 V/5 V logic interface
Serial interface SPI®/QSPI™/MICROWIRE™/DSP-compatible
Daisy-chain multiple ADCs and busy indicator
Power dissipation
   4 mW @ 5 V/100 kSPS
   40 μW @ 5 V/1 kSPS
Standby current: 1 nA
10-lead package: MSOP (MSOP-8 size) and
   3 mm × 3 mm QFN (LFCSP) (SOT-23 size)
Pin-for-pin compatible with the AD7687, AD7688 and18-bit AD7690 and AD7691