AD7942BRMZ-RL7

模数转换器 - ADC 14-Bit 250KSPS PSEUDO DIFF IC

Product Details

The AD7942 is a 14-bit, charge redistribution, successive approximation PulSAR® ADC that operates from a single power supply, VDD, between 2.3 V to 5.5 V. It contains a low power, high speed, 14-bit sampling ADC with no missing codes, an internal conversion clock, and a versatile serial interface port. The part also contains a low noise, wide bandwidth, short aperture delay track-and-hold circuit. On the CNV rising edge, it samples an analog input, IN+, between 0 V to VREF with respect to a ground sense, IN−. The reference voltage, VREF, is applied externally and is set up to be the supply voltage. Its power scales linearly with the throughput.

The SPI-compatible serial interface also features the ability, using the SDI input, to daisy-chain several ADCs on a single 3-wire bus and provides an optional busy indicator. It is compatible with 1.8 V, 2.5 V, 3 V, or 5 V logic using a separate supply VIO.

The AD7942 is housed in a 10-lead MSOP or a 10-lead LFCSP package yet fits in the same size footprint as the 8-lead MSOP or SOT-23. Operation for the AD7942 is specified from −40°C to +85°C.

**Applications**

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Battery-powered equipment

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Data acquisition

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Instrumentation

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Medical instruments

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Process controls

### Features and Benefits

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14-bit resolution with no missing codes

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Throughput: 250 kSPS

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INL: ±0.4 LSB typical, ±1 LSB maximum ±0.0061% of FSR

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SINAD: 85 dB @ 20 kHz

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THD: −100 dB @ 20 kHz

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Pseudo differential analog input range

0 V to VREF with VREF up to VDD

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No pipeline delay

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See Data Sheet for Additional Information