ADS7279

低功耗、14 位、1MHz 单/双路单极输入 ADC，具有串行接口

The 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.

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2.7V to 5.5V Analog Supply, Low Power:

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13.7mW 1MHz, +VA = 3V, +VBD = 1.8V

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1MHz Sampling Rate 3V ≤ +VA ≤ 5.5V,

900kHz Sampling Rate 2.7V ≤ +VA ≤ 3V

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Excellent DC Performance:

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±0.4LSB Typ, ±1.0LSB Max INL

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±0.4LSB Typ, ±1.0LSB Max DNL

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±0.8mV Max Offset Error at 3V

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±1.25mV Max Offset Error at 5V

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Excellent AC Performance at fi = 10kHz with 85.9dB SNR, 105.3dB SFDR, -100.1dB THD

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Built-In Conversion Clock CCLK

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1.65V to 5.5V I/O Supply:

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SPI/DSP-Compatible Serial Interface

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SCLK up to 50MHz

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Comprehensive Power-Down Modes:

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Deep Power-Down

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Nap Power-Down

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Auto Nap Power-Down

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Unipolar Input Range: 0V to VREF

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Software Reset

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Global CONVST Independent of CS

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Programmable Status/Polarity EOC/INT

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4 × 4 QFN-16 and TSSOP-16 Packages

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Multi-Chip Daisy-Chain Mode

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Programmable TAG Bit Output

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Auto/Manual Channel Select Mode ADS7280

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APPLICA ONS

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Communications

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Transducer Interface

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Medical Instruments

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Magnetometers

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Industrial Process Control

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Data Acquisition Systems

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Automatic Test Equipment