AD2S90
PRODUCTIONLow Cost, Complete 12-Bit Resolver-to-Digital Converter
- Part Models
- 2
- 1ku List Price
- Starting From $54.58
Overview
- Complete Monolithic Resolver-to-Digital Converter
- Incremental Encoder Emulation (1024-Line)
- Absolute Serial Data (12-Bit)
- Differential Inputs
- 12-Bit Resolution
- Industrial Temperature Range
- 20-Lead PLCC
- Low Power (50 mW)
The AD2S90 is a complete 12-bit resolution tracking resolver-to- digital converter. No external components are required to operate the device.
The converter accepts 2 V rms ± 10% input signals in the range 3 kHz-20 kHz on the SIN, COS and REF inputs. A Type II servo loop is employed to track the inputs and convert the input SIN and COS information into a digital representation of the input angle. The bandwidth of the converter is set internally at 1 kHz. The maximum tracking rate is 375 rps at 12-bit resolution.
Angular position output information is available in two forms, absolute serial binary and incremental A quad B.
The absolute serial binary output is 12-bit (1 in 4096). The data output pin is high impedance when Chip Select CS is logic HI. This allows the connection of multiple converters onto a common bus. Absolute angular information in serial pure binary form is accessed by CS followed by the application of an external clock (SCLK) with a maximum rate of 2 MHz.
The encoder emulation outputs A, B and NM continuously produce signals equivalent to a 1024 line encoder.
When decoded this corresponds to 12-bits resolution. Three common north marker pulse widths are selected via a single pin (NMC).
An analog velocity output signal provides a representation of velocity from a rotating resolver shaft traveling in either a clockwise or counterclockwise direction.
The AD2S90 operates on a ±5 V dc ± 5% power supplies and is fabricated on Analog Devices' Linear Compatible CMOS process (LC2MOS). LC2MOS is a mixed technology process that combines precision bipolar circuits with low power CMOS logic circuits.
Documentation
Data Sheet 1
Application Note 4
Technical Articles 2
Device Drivers 1
Complementary Part Guides 1
Analog Dialogue 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| AD2S90APZ | 20-Lead Flatpack | ||
| AD2S90APZ-RL7 | 20-Lead Flatpack |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Feb 3, 2009 - 08_0001 Qualification of 8" 3um BiCMOS wafer fab process at Analog Devices, Limerick, Ireland. |
||
| AD2S90APZ | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Evaluation Software 0
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