ADS8885

ADS8885 www.ti.com SBAS568A – MAY 2013 – REVISED DECEMBER 2013 18-Bit, 400-kSPS, Serial Interface, microPower, Miniature, True-Differential Input, SAR Analog-to-Digital Converter Check for Samples: ADS8885 FEATURES 1 234 Sample Rate: 400 kHz No Latency Output Unipolar, True-Differential Input Range: –VREF to +VREF Wide Common-Mode Voltage Range: 0 V to VREF with 90-dB CMRR (min) SPI™-Compatible Serial Interface with Daisy-Chain Option Excellent AC and DC Performance: – SNR: 100 dB, THD: –115 dB – INL: ±1.5 LSB (typ), ±3.0 LSB (max) – DNL: +1.5 and –1 LSB (max), 18-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 18 Bits: 1200 ns Packages: MSOP-10 and SON-10 APPLICATIONS Automatic Test Equipment (ATE) Instrumentation and Process Controls Precision Medical Equipment Low-Power, Battery-Operated Instruments DESCRIPTION The ADS8885 is an 18-bit, 400-kSPS, true-differential 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). The device offers an SP...