The AD7904/AD7914/AD7924 are respectively, 8-bit, 10-bit, and 12-bit, high speed, low power, 4-channel, successive-approximation ADCs. The parts operate from a single 2.7 V to 5.25 V power supply and feature throughput rates up to 1 MSPS. The AD7904/AD7914/AD7924 feature flexible power/serial clock speed management, no pipeline delays, up to 70 dB SNR, SPI/QSPI/MICROWIRE/DSP compatible high speed serial interface, and 0.5 µA maximum shutdown mode.
The AD7904/AD7914/AD7924 family provides high‑speed, low‑power analog‑to‑digital conversion in a 16‑lead TSSOP package. Each device operates from a single 2.7 V to 5.25 V supply and offers up to 1 MSPS throughput. The ADCs feature a low‑noise track‑and‑hold amplifier, four single‑ended inputs with a channel sequencer, and a variety of serial interfaces (SPI, QSPI, Microwire, DSP compatible).\n\nKey specifications include 8‑, 10‑, and 12‑bit resolution, up to 70 dB SNR, 800 ns conversion time, and power dissipation as low as 6 mW at 3 V in normal mode. The document also provides detailed timing diagrams, layout recommendations, and mechanical dimensions.
| Resolution | 8 bits (AD7904), 10 bits (AD7914), 12 bits (AD7924) |
|---|---|
| Throughput Rate | 1 MSPS max |
| Power Dissipation (3 V, normal mode) | 6 mW max |
| Input Voltage Range | 0 V to REF (2.5 V) |
| Conversion Time | 800 ns max (16 SCLK cycles at 20 MHz) |
The devices can sample up to 1 MSPS.
It dissipates up to 6 mW.
Each ADC provides four single‑ended inputs with a channel sequencer.
The ADCs support SPI, QSPI, Microwire, and DSP‑compatible interfaces.