The AD7940 is a 14-bit ADC with a sampling rate of 100kSPS and low power consumption. It supports 6-lead SOT-23 and 8-lead MSOP packages.
The AD7940 is a 14‑bit successive‑approximation ADC that operates from a single 2.5 V to 5.5 V supply. It delivers up to 100 kSPS throughput with a low‑noise, wide‑bandwidth track‑and‑hold amplifier capable of handling input frequencies above 7 MHz. The device features flexible power and serial‑clock management, a standby mode of 0.5 pA, and multiple serial interfaces (SPI, QSPI, Microwire, DSP compatible).
The datasheet provides detailed specifications, timing diagrams, pin configurations for both 6‑lead SOT‑23 and 8‑lead MSOP packages, absolute maximum ratings, and layout recommendations. Application hints cover grounding, decoupling, and evaluation board usage.
| Resolution | 14 bits min |
|---|---|
| Throughput Rate | 100 kSPS max |
| Input Capacitance | 30 pF typ |
| Standby Current | 0.5 pA max |
The AD7940 can sample at up to 100 kSPS.
In standby mode the device draws only 0.5 pA maximum.
The AD7940 is offered in 6‑lead SOT‑23 and 8‑lead MSOP packages.
The full‑power bandwidth is about 7 MHz (‑3 dB).