Texas Instruments ADS8864
The ADS8864 is a 16-bit, 400-kSPS, single-ended input, analog-to-digital converter (ADC). The device operates with a 2.5-V to 5-V external reference, offering a wide selection of signal ranges without additional input signal scaling. The reference voltage setting is independent of, and can exceed, the analog supply voltage (AVDD).FEATURES
●1 Sample rate: 400 kHz● No latency output
● Unipolar, single-ended input range: 0 to +VREF
● SPI™-compatible serial interface with daisy-chain option
● Excellent AC and DC performance: – SNR: 93 dB, THD: –108 dB – INL: ±1.0 LSB (typ), ±2.0 LSB (max) – DNL: ±1.0 LSB (max), 16-bit NMC
● Wide operating range: – AVDD: 2.7 V to 3.6 V – DVDD: 1.65 V to 3.6 V (independent of AVDD) – REF: 2.5 V to 5 V (independent of AVDD) – Operating temperature: –40°C to +85°C
● Low-power dissipation: – 2.6 mW at 400 kSPS – 0.65 mW at 100 kSPS – 65 µW at 10 kSPS
● Power-down current (AVDD): 50 nA
● Full-scale step settling to 16 Bits: 1200 ns
● Packages: VSSOP-10 and VSON-10 2
APPLICATIONS
● Automatic test equipment (ATE)● Instrumentation and process controls
● Precision medical equipment
● Low-power, battery-operated instruments 3
DESCRIPTION
The device offers an SPI-compatible serial interface that also supports daisy-chain operation for cascading multiple devices. An optional busyindicator bit makes synchronizing with the digital host easy.