AD7457 is a 12-bit low power SAR ADC with pseudo differential analog input, wide input bandwidth, flexible power/serial clock speed management, no pipeline delays, high speed serial interface. It is suitable for transducer interface, battery-powered systems, data acquisition systems and portable instrumentation.
The AD7457 is a 12‑bit successive‑approximation ADC designed for low‑power operation (0.9 mW at 3 V, 100 kSPS). It operates from a single 2.7 V to 5.25 V supply and provides a pseudo‑differential analog input with a wide input bandwidth and no pipeline delays. The device features a high‑speed serial interface compatible with SPI, QSPI, Microwire and DSP protocols, and includes automatic power‑down mode.
Typical applications include transducer interfaces, battery‑powered systems, data‑acquisition equipment and portable instrumentation. The AD7457’s small 8‑lead SOT‑23 package makes it suitable for space‑constrained designs.
| Resolution | 12 Bits |
|---|---|
| Signal to Noise Ratio (SNR) | 71 dB min |
| Power Consumption (3 V) | 0.9 mW max at 100 kSPS |
| Supply Voltage (Vop) | 2.7 V to 5.25 V |
It consumes 0.9 mW maximum at 100 kSPS when powered at 3 V.
The device supports SPI, QSPI, Microwire, and DSP‑compatible serial interfaces.
The input spans –0.1 V to +0.4 V for that supply range.