Key facts
- Brand
- Analog Devices
- Model
- AD2S90
- Category
- Other Electronics
- Documents
- 3
- Languages
- EN
- Last added
- 2012-08-02
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Analog Devices AD2S90 Resolver-to-Digital Converter Application Note AN-230
The document is an application note (AN-230) from Analog Devices regarding the AD2S90 Resolver-to-Digital Converter. It details specific circuit implementations for digitizing resolver signals without external components.
The text covers three main applications: absolute position data serial-to-parallel conversion using shift registers, EIA-485 communication for long-distance data transmission, and 4096 line incremental encoder emulation.
Analog Devices AD2S90 specifications
| Resolution | 12 Bit |
|---|---|
| Max Read Rate | 137 Kbyte/s |
| Max Rotating Speed | 22,500 rpm |
| Settling Time (1° Step) | 5 ms |
| Settling Time (179° Step) | 20 ms |
| Logic /O Standard | TTL |
| Power Supply | +5V |
| Operating Temperature Range | -40°C to +85°C |
Source: Analog Devices AN-234 Digital Resolver Integration Application Note
All Analog Devices AD2S90 documents by type
How to use the product for one specific task, with worked examples.
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the maximum serial clock rate for the AD2S90?
The maximum serial clock rate could be as high as 2 MHz with a 50% duty cycle.
From: Analog Devices AD2S90 Resolver-to-Digital Converter Application Note AN-230
What is the resolution of the AD2S90?
The device provides a 12-bit resolution.
From: Analog Devices AD2S90 Resolver-to-Digital Converter Application Note AN-230
What components are used in the digital resolver design?
The design uses a Size 11 Brushless Resolver, an AD2S90 Resolver-to-Digital Converter, and various resistors and capacitors.
From: Analog Devices AN-234 Digital Resolver Integration Application Note
Can the digital resolver replace an incremental encoder?
Yes, it can be used as a direct replacement for an encoder without needing to change or upgrade the interface.
From: Analog Devices AN-234 Digital Resolver Integration Application Note
What supply voltages does the AD2S90 require?
The device operates from a +5 V and –5 V supply, each with a ±5 % tolerance.
From: Analog Devices AD2S90 Resolver-to-Digital Converter Datasheet
How many bits of angular position data are provided?
The AD2S90 outputs a 12‑bit absolute serial angular position (1 in 4096).
From: Analog Devices AD2S90 Resolver-to-Digital Converter Datasheet