Overview
The AD2S1210SST-EP-RL7, produced by Analog Devices Inc., is a complete 10-bit to 16-bit resolution tracking resolver-to-digital converter. This device integrates an on-board programmable sinusoidal oscillator that provides sine wave excitation for resolvers. It is designed to convert the input sine and cosine signals from a resolver into a digital representation of the input angle and velocity. The converter employs a Type II servo loop to ensure continuous output position data without conversion delay, offering noise immunity and tolerance to harmonic distortion on the reference and input signals.
Key Specifications
| Parameter | Specification |
|---|---|
| Resolution | 10-bit to 16-bit, user-programmable |
| Maximum Tracking Rate | 3125 rps |
| Accuracy | ±2.5 arc minutes |
| Input Signal Range | 3.15 V p-p ± 27% (differential input) |
| Input Frequency Range | 2 kHz to 20 kHz |
| Supply Voltage | 5 V with 2.3 V to 5 V logic interface |
| Temperature Range | −55°C to +125°C (for EP grade) |
| Package | 48-Lead Low Profile Quad Flat Package (LQFP) |
| Interface | Parallel and serial (SPI compatible) |
Key Features
- Ratiometric Tracking Conversion: Provides continuous output position data without conversion delay and offers noise immunity and tolerance to harmonic distortion.
- System Fault Detection: Detects loss of resolver signals, out-of-range input signals, input signal mismatch, or loss of position tracking. Fault detection threshold levels can be individually programmed.
- Programmable Excitation Frequency: Excitation frequency can be programmed to standard frequencies between 2 kHz and 20 kHz.
- Triple Format Position Data: Absolute 10-bit to 16-bit angular position data accessible via 16-bit parallel port or 4-wire serial interface. Incremental encoder emulation in standard A-quad-B format with direction output available.
- Digital Velocity Output: 10-bit to 16-bit signed digital velocity accessible via 16-bit parallel port or 4-wire serial interface.
- Programmable Sinusoidal Oscillator: On-board oscillator provides sine wave excitation for resolvers.
- Incremental Encoder Emulation: Supports standard A-quad-B format with direction output.
Applications
- DC and AC Servo Motor Control: Precise position and velocity feedback for servo motor control systems.
- Encoder Emulation: Can emulate incremental encoders, providing compatibility with existing systems.
- Electric Power Steering: Used in automotive electric power steering systems for precise position and velocity feedback.
- Electric Vehicles: Applied in various control systems within electric vehicles.
- Integrated Starter Generators/Alternators: Provides critical feedback for integrated starter generator and alternator systems.
- Automotive Motion Sensing and Control: Used in various automotive motion sensing and control applications.
Q & A
- What is the resolution range of the AD2S1210SST-EP-RL7?
The resolution range is 10-bit to 16-bit, which is user-programmable.
- What is the maximum tracking rate of the AD2S1210SST-EP-RL7?
The maximum tracking rate is 3125 rps.
- What is the input signal range for the AD2S1210SST-EP-RL7?
The input signal range is 3.15 V p-p ± 27% (differential input).
- What are the supported interface types for the AD2S1210SST-EP-RL7?
The device supports both parallel and serial (SPI compatible) interfaces.
- What are the key applications of the AD2S1210SST-EP-RL7?
Key applications include DC and AC servo motor control, encoder emulation, electric power steering, electric vehicles, integrated starter generators/alternators, and automotive motion sensing and control.
- Does the AD2S1210SST-EP-RL7 have built-in fault detection?
Yes, it includes a fault detection circuit that can sense loss of resolver signals, out-of-range input signals, input signal mismatch, or loss of position tracking. The fault detection threshold levels can be individually programmed.
- What is the temperature range for the AD2S1210SST-EP-RL7?
The temperature range is −55°C to +125°C for the EP grade.
- Is the AD2S1210SST-EP-RL7 compatible with automotive safety standards?
Yes, it is AEC-Q100 qualified and has an ASIL B safety assessment certificate available for automotive safety integrity level B rated applications.
- What package type does the AD2S1210SST-EP-RL7 come in?
The device comes in a 48-Lead Low Profile Quad Flat Package (LQFP).
- Can the excitation frequency of the AD2S1210SST-EP-RL7 be programmed?
Yes, the excitation frequency can be programmed to standard frequencies between 2 kHz and 20 kHz.
