This document describes the features and characteristics of the 12-bit, 20 MSPS/40 MSPS/65 MSPS 3V Low Power A/D Converter AD9237, including ultralow power consumption, high signal-to-noise ratio, and high dynamic range.
The AD9237 is a 12‑bit, 3 V single‑supply analog‑to‑digital converter available in a 32‑lead LFCSP package. It features a high‑performance sample‑and‑hold amplifier, low power consumption (85 mW at 20 MSPS, 135 mW at 40 MSPS, 190 mW at 65 MSPS) and flexible input ranges from 1 V p‑p to 4 V p‑p, making it suitable for ultrasound, handheld meters, low‑cost oscilloscopes and other low‑power applications.
The device provides up to 65 MSPS sampling, 66 dBc SNR and 80 dBc SFDR at the highest rate, with selectable data formats and an output‑enable pin for multiplexing. Detailed specifications, pin descriptions, timing diagrams and ordering information are included for designers.
| Resolution | 12 bits |
|---|---|
| Maximum Sampling Rate | 65 MSPS |
| Power Consumption (20 MSPS) | 85 mW |
| Power Consumption (40 MSPS) | 135 mW |
| Power Consumption (65 MSPS) | 190 mW |
| Input Voltage Range | 1 V p‑p to 4 V p‑p |
| Signal‑to‑Noise Ratio (65 MSPS) | 66 dBc |
| Spurious‑Free Dynamic Range (65 MSPS) | 80 dBc |
| Operating Temperature Range | -40 °C to +85 °C |
| Analog Supply Voltage (AVDD) | 3 V |
The AD9237 can sample at up to 65 MSPS.
It operates from a single 3 V analog supply (AVDD) and a separate digital output driver supply (DRVDD) of 2.5 V or 3.3 V.
The device supports a two‑step power‑down that includes a standby mode in addition to a full power‑down.
It accepts flexible analog inputs from 1 V p‑p up to 4 V p‑p.