The document describes the Analog Devices' variable resolution monolithic resolver-to-digital converters AD2S81A/AD2S82A. The product features a one-chip solution, user-settable resolution, ratiometric tracking conversion, and user-determined dynamic performance.
The AD2S81A and AD2S82A are monolithic tracking resolver-to-digital converters that convert resolver format input signals into a parallel natural binary digital word. The AD2S81A is a 12-bit fixed resolution device, while the AD2S82A allows users to select resolutions of 10, 12, 14, or 16 bits. Both devices utilize a ratiometric tracking conversion method to ensure high noise immunity and tolerance to harmonic distortion.
| Resolution | 10, 12, 14, or 16 bits (AD2S82A); 12 bits (AD2S81A) |
|---|---|
| Max Tracking Rate (10-bit) | 1040 rps |
| Power Consumption | Typically 300 mW |
| ESD Protection | Class II (2,000 V Min) |
| Angular Accuracy (Typical) | 622 + 1 LSB arc min |
| Package Type | 28-lead DIP (AD2S81A); 44-lead PLCC (AD2S82A) |
The AD2S82A resolution can be selected by the user to be 10, 12, 14, or 16 bits.
The maximum tracking rate is 1040 revolutions per second (rps).
Yes, an analog signal proportional to velocity is available and can be used to replace a tachogenerator.