AD7988-1BRMZ-RL7

The AD7988-1/AD7988-5 are 16-bit, successive approximation ADCs operating from a single VDD supply. The AD7988-1 offers 100 kSPS throughput, and the AD7988-5 offers 500 kSPS throughput. Both are low-power, 16-bit sampling ADCs with a versatile serial interface port. On the rising edge of CNV, the devices sample the analog input voltage difference between IN+ and IN−, ranging from 0 V to V_REF. The reference voltage (REF) is supplied externally and can be set independently of the supply voltage (VDD). The SPI-compatible serial interface also supports daisy-chaining multiple ADCs on a single 3-wire bus using the SDI input. It operates from a separate VIO supply, compatible with 1.8 V, 2.5 V, 3 V, and 5 V logic. The AD7988-1/AD7988-5 are available in 10-lead MSOP or 10-lead LFCSP (QFN) packages, with an operating temperature range of −40°C to +125°C.

Applications

• Battery-powered devices
• Low-power data acquisition systems
• Portable medical instruments
• Automatic test equipment
• Data acquisition
• Communications

Key features

• Low power: 3.5 mW for AD7988-5 (500 kSPS); 700 μW for AD7988-1 (100 kSPS)
• 16-bit resolution, no missing codes
• Throughput rate: 100 kSPS/500 kSPS selectable
• INL: ±0.6 LSB (typical), ±1.25 LSB (maximum)
• SINAD: 91.5 dB (10 kHz)
• THD: -114 dB (10 kHz)
• Pseudo-differential analog input range: 0 V to V_REF (V_REF from 2.5 V to 5.5 V)
• Any input range, easily driven with ADA4841-1
• No pipeline delay
• 2.5 V single supply with 1.8 V/2.5 V/3 V/5 V logic interface
• SPI/QSPI/MICROWIRE/DSP compatible serial interface
• Daisy-chainable multiple ADCs
• 10-lead MSOP and 10-lead 3 mm×3 mm LFCSP (QFN) (SOT-23 footprint) packages
• Wide operating temperature range: -40°C to +125°C