Resolver to Digital Converters

A resolver to digital converter is an electrical type device that acts as a converter of resolver sensors signal and outputs them as a digital value that corresponds to the rotating shaft angle and velocity.

How does a resolver to digital converter work?

This particular type of converter operates by using sine and cosine signals to decode the angular position and rotation speed of the motor shaft through the interface between a resolver and a microprocessor.

These converters perform calculations of velocity through the utilisation of a Type-II tracking loop that makes use of a second-order filter that is designed to ensure that steady-state errors are zero for constant velocity signals. The converter will then sample both inputs to output digital data to the tracking loop.

Some of these types of converters also feature A fault detection sensor which circuit can sense a loss of resolver signals, out-of-range input signals, input signal mismatch, or loss of position tracking.

Where are resolver to digital converters used?

These converters are widely used in noisy environments that induce high-frequency noise into sine and cosine lines such as the automotive industry and industrial sectors.

Resolver to digital converters are used in applications such as;

Encoder emulation

Integrated starter generators/alternators

Automotive motion sensing and control

DC and ac servo motor control


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Description Price Resolution Accuracy Input Signal Type Digital Interface Type Typical Tracking Rate Typical Reference Frequency Velocity Output Mounting Type Package Type Pin Count Power Supply Type Typical Single Supply Voltage Typical Dual Supply Voltage Dimensions
RS stock no. 538-5520
Mfr. Part No.AD2S1200YSTZ
R 634.69
Each
units
12 bit ±11arcmin Differential Parallel, Serial 1000 rps 20kHz Yes Surface Mount LQFP 44 Single 5 V - 10 x 10 x 1.4mm
RS stock no. 204-7631
Mfr. Part No.RAA3064002GFP#AA0
R 129.72
Each
units
8 bit - Differential Serial - - - - LQFP 48 - - - -
RS stock no. 708-9457
Mfr. Part No.AD2S1210ASTZ
R 320.82
Each
units
16 bit ±10arcmin Differential Parallel, Serial 156.25 rps 20kHz Yes Surface Mount LQFP 48 Single 5 V - 7 x 7 x 1.4mm
RS stock no. 759-0648
Mfr. Part No.AD2S1210DSTZ
R 414.10
Each
units
- - - - 3125 rps - - Surface Mount LQFP 48 - - - 7.2 x 7.2 x 1.45mm
RS stock no. 708-9451
Mfr. Part No.AD2S1210BSTZ
R 336.94
Each
units
16 bit ±5arcmin Differential Parallel, Serial 156.25 rps 20kHz Yes Surface Mount LQFP 48 Single 5 V - 7 x 7 x 1.4mm
RS stock no. 708-9454
Mfr. Part No.AD2S1205YSTZ
R 378.65
Each
units
12 bit ±11arcmin Differential Parallel, Serial 750 rps 20kHz Yes Surface Mount LQFP 44 Single 5 V - 10 x 10 x 1.4mm
RS stock no. 819-7360
Mfr. Part No.AD2S1210CSTZ
R 358.19
Each
units
16 bit ±2.5arcmin Differential Parallel, Serial 156.25 rps 20kHz Yes Surface Mount LQFP 48 Single 4.75 → 5.25 V - 7.2 x 7.2 x 1.45mm
RS stock no. 412-545
Mfr. Part No.AD2S90APZ
R 1,004.41
Each
units
12 bit ±10.6arcmin Differential Serial 500 rps 20kHz Yes Surface Mount PLCC 20 Dual - ±5V 9.04 x 9.04 x 3.68mm
RS stock no. 427-193
Mfr. Part No.AD2S82AHPZ
R 1,945.03
Each
units
16 bit ±22arcmin Single Ended Parallel 16.25 rps 20kHz Yes Surface Mount PLCC 44 Dual - ±12V 16.66 x 16.66 x 3.68mm
RS stock no. 538-5514
Mfr. Part No.AD2S1200WSTZ
R 481.28
Each
units
12 bit ±22arcmin Differential Parallel, Serial 1000 rps 20kHz Yes Surface Mount LQFP 44 Single 5 V - 10 x 10 x 1.4mm