AD9235 is a 12-bit, 20/40/65 MSPS, 3 V A/D converter. The converter features single 3 V supply operation (2.7 V to 3.6 V), SNR = 70 dBc to Nyquist at 65 MSPS, SFDR = 85 dBc to Nyquist at 65 MSPS, low power (300 mW at 65 MSPS), differential input with 500 MHz bandwidth, on-chip reference and SHA, DNL = ±0.4 LSB, flexible analog input (1 V p-p to 2 V p-p range), offset binary or twos complement data format, clock duty cycle stabilizer, etc. The converter can be used in ultrasound equipment, IF sampling in communications receivers, IS-95, CDMA-One, IMT-2000, battery-powered instruments, hand-held scopemeters and low cost digital oscilloscopes.
The AD9235 is a 12‑bit, 20/40/65 MSPS analog‑to‑digital converter that operates from a single 3 V supply and includes a high‑performance sample‑and‑hold amplifier and on‑chip reference. It offers differential inputs with selectable ranges, a duty‑cycle stabilizer for clock variations, and low power consumption (300 mW at 65 MSPS). The device is targeted at ultrasound equipment, communications receivers, battery‑powered instruments, hand‑held scopemeters, and low‑cost digital oscilloscopes.
The datasheet details electrical specifications, pin configurations for both 28‑lead TSSOP and 32‑lead LFCSP packages, absolute maximum ratings, and performance metrics such as SNR (70 dBc), SFDR (85 dBc), DNL (+0.4 LSB), and INL (+0.45 LSB). It also includes application notes, evaluation board information, and ordering guidance.
| Resolution | 12 bits |
|---|---|
| Signal‑to‑Noise Ratio (65 MSPS) | 70 dBc |
| Spurious‑Free Dynamic Range (65 MSPS) | 85 dBc |
| Differential Non‑Linearity (DNL) | +0.4 LSB |
| Power Consumption (65 MSPS) | 300 mW |
At 65 MSPS the device consumes about 300 mW of power.