描述 Description

The ADS8327 is a low power, 16-bit, 500-kSPS analog-to-digital converter with a unipolar input. The device includes a 16-bit capacitor-based SAR A/D converter with inherent sample and hold. The ADS8328 is based on the same core and includes a 2-to-1 input MUX with programmable option of TAG bit output. Both the ADS8327 and ADS8328 offer a high-speed, wide voltage serial interface and are capable of chain mode operation when multiple converters are used. These converters are available in a 16-lead TSSOP or 4×4 QFN packages and are fully specified for operation over the industrial –40°C to +85°C temperature range.

特性 Features

? 2.7-V to 5.5-V Analog Supply, Low Power:
? 10.6 mW (500 kHz, +VA = 2.7 V, +VBD = 1.8 V)

? 500-kHz Sampling Rate
? Excellent DC Performance
? ±1.5 LSB Typ, ±2 LSB Max INL
? ±0.6 LSB Typ, ±1 LSB Max DNL
? 16-Bit NMC Over Temperature
? ±0.5 mV Max Offset Error at 2.7 V
? ±1 mV Max Offset Error at 5 V

? Excellent AC Performance at fI = 10 kHz with 91 dB SNR, 100 dB SFDR, –96 dB THD
? Built-In Conversion Clock (CCLK)
? 1.65 V to 1.5×(+VA) I/O Supply
? SPI/DSP Compatible Serial
? SCLK up to 50 MHz

? Comprehensive Power-Down Modes:
? Deep Power-Down
? Nap Power-Down
? Auto Nap Power-Down

? Unipolar Input Range: 0 V to VREF
? Software Reset
? Global CONVST (Independent of CS)
? Programmable Status/Polarity EOC/INT
? 16-Pin 4×4 QFN or 16-Pin TSSOP Packages
? Multi-Chip Daisy Chain Mode
? Programmable TAG Bit Output
? Auto/Manual Channel Select Mode
? APPLICATIONS

? Communications
? Transducer Interface
? Medical Instruments
? Magnetometers
? Industrial Process Control
? Data Acquisition Systems
? Automatic Test Equipment