Model No: AD2S90AP
Analog Devices Inc. AD2S90AP
Manufacturer:Analog Devices Inc.
SEMICON NO.:AD2S90AP
Package:20-LCC (J-Lead)
Stock:In stock
Description:Tube
SEMICON NO.:AD2S90AP
Package:20-LCC (J-Lead)
Stock:In stock
Description:Tube
Quantity :
| Mfr | Analog Devices Inc. |
| Series | - |
| Package | Tube |
| Product Status | Obsolete |
| Type | R/D Converter |
| Number of Channels | 2 |
| Resolution (Bits) | 12 b |
| Sampling Rate (Per Second) | - |
| Data Interface | Serial |
| Voltage Supply Source | Dual u00b1 |
| Voltage - Supply | u00b14.75V ~ 5.25V |
| Operating Temperature | -40°C ~ 85°C |
| Mounting Type | Surface Mount |
| Package / Case | 20-LCC (J-Lead) |
| Supplier Device Package | 20-PLCC (9x9) |
| Base Product Number | AD2S90 |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| ECCN | EAR99 |
| HTSUS | 8542.39.0001 |
| Standard Package | 1 |
ADI RDC chip AD2S90AP 12-Bit Resolver-to-Digital Converter – Complete Overview
The AD2S90AP is a low-cost, 12-bit resolution tracking resolver-to-digital converter (RDC) manufactured by Analog Devices (ADI). Designed as a monolithic solution, it requires no external components for operation, simplifying system integration. The device accepts 2 V RMS ±10% input signals (SIN, COS, and REF) within a 3 kHz to 20 kHz frequency range and employs a Type II servo loop to convert analog resolver signals into a 12-bit digital angle representation. It operates on dual ±5V ±5% power supplies, consuming only 50 mW of power, and supports an industrial temperature range (-40°C to +85°C). The output is available in absolute serial binary (12-bit) and incremental A-quad-B encoder emulation (equivalent to a 1024-line encoder). Packaged in a 20-pin PLCC, it features a maximum tracking rate of 375 rps (500 rps in some variants) and includes a velocity output signal for rotational speed detection.AD2S90AP Key Features
TheAD2S90AP stands out with its high integration and precision, offering 12-bit angular resolution (1/4096) with a maximum error of ±10.6 arc-minutes. Its differential inputs enhance noise immunity, making it suitable for electrically noisy environments. The Type II tracking loop ensures stable performance with a 1 kHz bandwidth, while the incremental encoder emulation (A, B, and NM outputs) simplifies interfacing with motion control systems. The serial binary output allows multi-device bus sharing via a 3-wire interface (CS, SCLK, DATA), supporting clock speeds up to 2 MHz. Additionally, the low-power design (50 mW typical) and industrial-grade temperature range make it ideal for harsh operating conditions.
Typical Applications
The AD2S90AP is widely used in industrial automation, robotics, and motion control systems where precise angular position sensing is critical. Common applications include:
1. Servo motor control (replacing optical encoders with resolver-based systems for higher reliability).
2. Automotive systems (steering angle detection, throttle position sensing).
3. Aerospace & defense (actuator positioning, gimbal control).
4. Industrial machinery (CNC machines, robotic arms).
The AD2S90AP is widely used in industrial automation, robotics, and motion control systems where precise angular position sensing is critical. Common applications include:
1. Servo motor control (replacing optical encoders with resolver-based systems for higher reliability).
2. Automotive systems (steering angle detection, throttle position sensing).
3. Aerospace & defense (actuator positioning, gimbal control).
4. Industrial machinery (CNC machines, robotic arms).
Selection Advantages
● Single-chip integration eliminates the need for external components, reducing PCB complexity.
● High noise immunity due to differential inputs, making it suitable for industrial and automotive EMI-heavy environments.
● Flexible output formats (serial binary + incremental encoder signals) ensure compatibility with various digital controllers.
● Low power consumption (50 mW) compared to discrete resolver interface circuits.
● Wide operating temperature range (-40°C to +85°C) ensures reliability in extreme conditions.
● Cost-effective compared to higher-resolution RDCs when 12-bit precision is sufficient.
● Single-chip integration eliminates the need for external components, reducing PCB complexity.
● High noise immunity due to differential inputs, making it suitable for industrial and automotive EMI-heavy environments.
● Flexible output formats (serial binary + incremental encoder signals) ensure compatibility with various digital controllers.
● Low power consumption (50 mW) compared to discrete resolver interface circuits.
● Wide operating temperature range (-40°C to +85°C) ensures reliability in extreme conditions.
● Cost-effective compared to higher-resolution RDCs when 12-bit precision is sufficient.
Alternative Models
1. AD2S90APZ – RoHS-compliant version with lead-free termination; otherwise identical to AD2S90AP.
2. AD2S1205 (WSTZ/YSTZ) – Higher-resolution (12-bit) with built-in reference oscillator, QFP-44 package.
3. AD2S1210 (CSTZ/BSTZ) – Variable resolution (10-16 bit), LQFP-48, includes on-chip excitation oscillator.
4. LTC1290CCSW#PBF – 12-bit ADC alternative (not resolver-specific) for simpler angle sensing applications.
1. AD2S90APZ – RoHS-compliant version with lead-free termination; otherwise identical to AD2S90AP.
2. AD2S1205 (WSTZ/YSTZ) – Higher-resolution (12-bit) with built-in reference oscillator, QFP-44 package.
3. AD2S1210 (CSTZ/BSTZ) – Variable resolution (10-16 bit), LQFP-48, includes on-chip excitation oscillator.
4. LTC1290CCSW#PBF – 12-bit ADC alternative (not resolver-specific) for simpler angle sensing applications.
