描述 Description

The ADS8331 is a low-power, 16-bit, 500-k samples-per-second (SPS) analog-to-digital converter (ADC) with a unipolar, 4-to-1 multiplexer (mux) input. The device includes a 16-bit capacitor-based successive approximation register (SAR) ADC with inherent sample and hold.The ADS8332 is based on the same core and includes a unipolar 8-to-1 input mux. Both devices offer a high-speed, wide-voltage serial interface and are capable of daisy-chain operation when multiple converters are used.These converters are available in 24-pin, 4 × 4 QFN and 24-pin TSSOP packages and are fully specified for operation over the industrial –40°C to 85°C temperature range.

特性 Features

? Low-Power, Flexible Supply Range:
? 2.7-V to 5.5-V Analog Supply
? 8.7 mW (250 kSPS in Auto-NAP Mode, VA = 2.7 V, VBD = 1.65 V)
? 14.2 mW (500 kSPS, VA = 2.7 V, VBD = 1.65 V)

? Up to 500-kSPS Sampling Rate
? Excellent DC Performance:
? ±1.2 LSB Typical, ±2 LSB Maximum INL at 2.7 V
? ±0.6 LSB Typical, –1/1.5 LSB Maximum DNL at 2.7 V
? 16-Bit NMC Over Temperature

? Excellent AC Performance at 5 V, fIN = 1 kHz:
? 91.5-dB SNR, 101-dB SFDR, –100-dB THD

? Flexible Analog Input Arrangement:
? On-Chip 4-/8-Channel Mux With Breakout
? Auto/Manual Channel Select and Trigger

? Other Hardware Features:
? On-Chip Conversion Clock (CCLK)
? Software/Hardware Reset
? Programmable Status/Polarity EOC/INT
? Daisy-Chain Mode
? Global CONVST (Independent of CS)
? Deep, Nap, and Auto-NAP Powerdown Modes
? SPI?/DSP Compatible Serial Interface
? Separate I/O Supply: 1.65 V to VA
? SCLK up to 40 MHz (VA = VBD = 5 V)

? 24-Pin 4-mm × 4-mm VQFN and 24-Pin TSSOP Packages