AD7942 is a 14-bit, 250 kSPS, pseudo differential ADC from Analog Devices, packaged in MSOP/QFN.
The AD7942 is a 14‑bit charge‑redistribution SAR ADC that operates from a single supply of 2.3 V to 5.5 V. It offers a pseudo‑differential input range from 0 V to VDD, no missing codes, and a low‑noise, short‑aperture track‑and‑hold circuit. The device supports SPI, QSPI, Microwire and daisy‑chaining for multiple converters.
Typical applications include battery‑powered equipment, data acquisition, instrumentation, medical instruments and process control. The part is supplied in 10‑lead MSOP or QFN (LFCSP) packages and is rated for operation from –40 °C to +85 °C.
| Resolution | 14 bits |
|---|---|
| Supply Voltage (VDD) | 2.3 V to 5.5 V |
| Throughput | 250 kSPS |
| Power Dissipation (2.5 V, 100 kSPS) | 1.25 mW |
| Standby Current | 1 nA |
| Input Voltage Range (IN+ – IN‑) | 0 V to VDD |
| Operating Temperature Range | -40 °C to +85 °C |
The AD7942 provides a 14‑bit resolution with no missing codes.
It operates from a single supply voltage between 2.3 V and 5.5 V.
The device can convert at up to 250 kSPS.
The standby current is specified as 1 nA.