AD2S1205 is a 12-bit R/D converter with reference oscillator
The AD2S1205 is a complete 12‑bit resolver‑to‑digital converter with an on‑board programmable sinusoidal oscillator. It accepts differential resolver inputs, provides absolute position and velocity outputs, and supports incremental encoder emulation. The device operates from a single 5 V supply and is rated for automotive and industrial motor‑control applications.
Key specifications include a 3.15 V p‑p ±27 % input range, +11 arc‑minute angular accuracy, up to 1250 rps tracking rate, and programmable excitation frequencies of 10 kHz to 20 kHz. The datasheet also lists pin configurations, fault‑detection features, and mechanical dimensions for the 44‑lead LQFP package.
| Input signal range | 3.15 V p‑p ±27 % |
|---|---|
| Resolution | 12 bits |
| Angular accuracy | +11 arc minutes |
| Maximum tracking rate | 1250 rps |
| Supply voltage | 5.0 V ±5 % |
| Excitation frequency options | 10 kHz, 12 kHz, 15 kHz, 20 kHz |
| Dynamic power consumption | 20 mA |
| Operating temperature range | -40 °C to +125 °C |
The device accepts differential input signals of 3.15 V p‑p with a tolerance of ±27 %.
It provides a 12‑bit resolution for absolute angular position data.
The AD2S1205 can track up to 1250 rps, depending on the external clock frequency.
The frequency is programmed via the FS1 and FS2 pins, allowing 10 kHz, 12 kHz, 15 kHz, or 20 kHz settings.