Part # AD7942 datasheet

Part Manufacturer: Analog Devices

Analog Devices

Part Description: AD7942 14-Bit 250 kSPS PulSAR Pseudo Differential ADC in MSOP/QFN Data Sheet (Rev. B)


Part Details:

14-Bit, 250 kSPS PulSAR, Pseudo Differential ADC in MSOP/QFN AD7942 FEATURES APPLICATION DIAGRAM 0.5V TO 5V 2.5V TO 5V 14-bit resolution with no missing codes Throughput: 250 kSPS INL: ±0.4 LSB typical, ±1 LSB maximum (±0.0061% of FSR) SINAD: 85 dB @ 20 kHz REF VDD VIO 1.8V TO VDD 0V TO V THD: -100 dB @ 20 kHz REF SDI IN+ AD7942 SCK Pseudo differential analog input range 3- OR 4-WIRE INTERFACE IN­ SDO (SPI, DAISY CHAIN, CS) 0 V to VREF with VREF up to VDD GND CNV No pipeline delay 01 Single-supply 2.3 V to 5.5 V operation with 07-65 1.8 V/2.5 V/3 V/5 V logic interface 04 Figure 1. Serial interface SPI-/QSPI-/MICROWIRE-/ DSP-compatible GENERAL DESCRIPTION Daisy-chaining for multiple ADCs and busy indicator The AD7942 is a 14-bit, charge redistribution, successive approxi- Power dissipation mation PulSAR® ADC that operates from a single power supply, 1.25 mW @ 2.5 V/100 kSPS, 3.6 mW @ 5 V/100 kSPS VDD, between 2.3 V to 5.5 V. It contains a low power, high 1.25 W @ 2.5 V/100 SPS speed, 14-bit sampling ADC with no missing codes, an internal Standby current: 1 nA conversion clock, and a versatile serial interface port. The part 10-lead package: MSOP and 3 mm × 3 mm QFN (LFCSP) also contains a low noise, wide bandwidth, short aperture delay Pin-for-pin compatible with the 16-bit AD7685 track-and-hold circuit. On the CNV rising edge, it samples an APPLICATIONS analog input, IN+, between 0 V to VREF with respect to a ground Battery-powered equipment sense, IN-. The reference voltage, VREF, is applied externally and Data acquisition is set up to be the supply voltage. Its power scales linearly with


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AD7942.pdf Datasheet