The AD7988-1/AD7988-5 are 16-bit, successive approximation,analog-to-digital converters (ADC) that operate from a singlepower supply, VDD. The AD7988-1BRMZ-RL7 offers a 100 kSPS throughput,and the AD7988-5 offers a 500 kSPS throughput. They are lowpower, 16-bit sampling ADCs with a versatile serial interfaceport. On the CNV rising edge, they sample an analog input,IN+, between 0 V to VREF with respect to a ground sense, IN−.The reference voltage, REF, is applied externally and can be setindependent of the supply voltage, VDD.
The SPI-compatible serial interface also features the ability todaisy-chain several ADCs on a single 3-wire bus using the SDIinput. It is compatible with 1.8 V, 2.5 V, 3 V, or 5 V logic usingthe separate supply, VIO.
The AD7988-1/AD7988-5 generics are housed in a 10-leadMSOP or a 10-lead LFCSP with operation specified from −40°Cto +125°C.
Feature
- Low power dissipation
- 400 µW at 100 kSPS (VDD only)
- 700 µW at 100 kSPS (total)
- 16-bit resolution with no missing codes
- Throughput: 100 kSPS/500 kSPS options
- INL: ±0.6 LSB typical, ±1.25 LSB maximum
- SINAD: 91.5 dB at 10 kHz
- THD: −114 dB at 10 kHz
- Pseudo differential analog input range
- 0 V to VREF with VREF from 2.5 V to 5.5 V
- No pipeline delay
- Single-supply 2.5 V operation with 1.8 V/2.5 V/3 V/5 V logic interface
- Proprietary SPI-/QSPI™-/MICROWIRE™-/DSP-compatible serial interface
- Daisy-chain multiple ADCs
- 10-lead MSOP and 10-lead, 3 mm × 3 mm LFCSP, same space as SOT-23
- Wide operating temperature range: −40°C to +125°C
Applications
- Battery-powered equipment
- Low power data acquisition systems
- Portable medical instruments
- ATE equipment
- Data acquisitions
- Communications
(Picture: Pinout)
