描述The ADS7279 is a low-power, 14-bit, 1MSPS analog-to-digital converter (ADC) with a unipolar input. The device includes a 14-bit, capacitor-based successive approximation register (SAR) ADC with inherent sample-and-hold.The ADS7280 is based on the same core and includes a 2-to-1 input MUX with a programmable TAG bit output option. Both the ADS7279 and ADS7280 offer a high-speed, wide voltage serial interface, and are capable of daisy-chain mode operation when multiple converters are used.These converters are available in 4 × 4 QFN and TSSOP-16 packages, and are fully specified for operation over the industrial -40°C to +85°C temperature range.特性2.7V to 5.5V Analog Supply, Low Power:13.7mW (1MHz, +VA = 3V, +VBD = 1.8V)1MHz Sampling Rate 3V ≤ +VA ≤ 5.5V,900kHz Sampling Rate 2.7V ≤ +VA ≤ 3VExcellent DC Performance:±0.4LSB Typ, ±1.0LSB Max INL±0.4LSB Typ, ±1.0LSB Max DNL±0.8mV Max Offset Error at 3V±1.25mV Max Offset Error at 5VExcellent AC Performance at fi = 10kHz with 85.9dB SNR, 105.3dB SFDR, -100.1dB THDBuilt-In Conversion Clock (CCLK)1.65V to 5.5VI/O Supply:SPI/DSP-Compatible Serial InterfaceSCLK up to 50MHzComprehensive Power-Down Modes:Deep Power-DownNap Power-DownAuto Nap Power-DownUnipolar Input Range: 0V toVREFSoftware ResetGlobal CONVST (Independent of CS)Programmable Status/Polarity EOC/INT4 × 4 QFN-16 and TSSOP-16 Packages Multi-Chip Daisy-Chain ModeProgrammable TAG Bit OutputAuto/Manual Channel Select Mode (ADS7280)APPLICATIONSCommunicationsTransducer InterfaceMedical InstrumentsMagnetometersIndustrial Process ControlData Acquisition SystemsAutomatic Test Equipment