The AD9238 is a dual, 3V, 12-bit, 20 MSPS/40 MSPS/65 MSPS analog-to-digital converter (ADC). It features dual high performance sample-and-hold amplifiers, operates on a 3V supply, and has a signal-to-noise ratio (SNR) of 70 dB and a spurious-free dynamic range (SFDR) of 80.5 dBc. It is suitable for applications such as ultrasound equipment, direct conversion or IF sampling receivers, WB-CDMA, CDMA2000, WiMAX, battery-powered instruments, handheld scopemeters, and low-cost digital oscilloscopes.
The AD9238 is a dual‑channel, 12‑bit analog‑to‑digital converter that operates from a single 3 V supply (2.7 V‑3.6 V). It offers selectable sampling rates of 20 MSPS, 40 MSPS, or 65 MSPS, low power consumption, and a clock‑duty‑cycle stabilizer for robust performance across a wide range of clock conditions.
The document provides full DC, AC, digital, and switching specifications, absolute maximum ratings, pin descriptions, typical performance characteristics, and mechanical details such as package dimensions and ordering options. Evaluation board schematics and bill‑of‑materials are also included for design reference.
| Resolution | 12 bits |
|---|---|
| Accuracy (Missing Codes) | No missing codes guaranteed |
| Power Consumption (65 MSPS) | 300 mW per channel |
| Operating Temperature Range | −40 °C to +85 °C |
The AD9238 supports up to 65 MSPS sampling rate.
It operates from a single 3 V supply, ranging from 2.7 V to 3.6 V.
Yes, a duty‑cycle stabilizer is available to maintain performance over a wide range of clock duty cycles.
Each channel consumes about 300 mW at 65 MSPS.