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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 Battery-powered equipment Data acquisition Instrumentation Medical instruments Process controls
supply_voltage_dc | 2.30 V (min) |
power_dissipation | 12.5 mW |
mil_spec | No |
rohs_status | Compliant |
reach_svhc_compliance | No SVHC |
lead_free_status | Contains Lead |
mounting_style | Surface Mount |
packaging | Tube, Bulk |
case_package | MSOP |
sample_rate | 250 kHz |
resolution_bits | 14.0 |
lifecycle_status | Active |
number_of_bits | 14 |
pin_count | 10 |
number_of_channels | 1 |
Resolution (Bits) | 14bit |
Sampling Rate | 250kSPS |
Supply Voltage Type | Single |
Supply Voltage Min | 2.3V |
Supply Voltage Max | 5.5V |
ADC / DAC Case Style | MSOP |
No. of Pins | 10Pins |
Input Channel Type | Pseudo Differential |
Data Interface | Serial, SPI |
Operating Temperature Min | -40°C |
Operating Temperature Max | 85°C |
Packaging | Each |
Product Range | Single 14-Bit SAR ADCs |
Automotive Qualification Standard | - |
RoHS Phthalates Compliant | Yes |
MSL | MSL 1 - Unlimited |
SVHC | No SVHC (07-Jul-2017) |
A/D / D/A Features | No Pipeline Delay, Multiple ADCs Daisy Chain, Busy Indicator, Serial Interface SPI® |
Base Number | 7942 |
Conversion Time | 2.2µs |
IC Case Style | SOP |
IC Generic Number | 7942 |
Linearity Error | 0.0061% |
Linearity Error ADC / DAC + | 0.4LSB |
Linearity Error ADC / DAC - | 0.4LSB |
Logic Function Number | 7942 |
No. of Bits | 14bit |
No. of Channels | 1Channels |
Operating Temperature Range | -40°C to +85°C |
Supply Current | 1nA |
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