Overview
The AD2S1210ASTZ, produced by Analog Devices Inc., is a comprehensive 10-bit to 16-bit resolution tracking resolver-to-digital converter. This device integrates an on-board programmable sinusoidal oscillator, which 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 AD2S1210ASTZ is particularly suited for applications requiring high precision and reliability, such as in automotive and industrial control systems.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Resolution | 10-bit to 16-bit | ||||
| Supply Voltage | 4.75 | 5 | 5.25 | V | |
| Logic Interface Voltage | 2.3 | 5.25 | V | ||
| Operating Temperature | -40°C | +125°C | C, D, and W grades | ||
| Tracking Rate | 3125 rps (10-bit, CLKIN = 10.24 MHz) | rps | Varying rates for different resolutions and clock frequencies | ||
| Acceleration Error | 30 arc min | arc min | At specified rps^2, CLKIN = 8.192 MHz | ||
| Settling Time | 0.6 ms (10-bit, 10° step input) | 0.9 ms | ms | To settle to within ±2 LSB, CLKIN = 8.192 MHz | |
| Input Signal Range | 3.15 V p-p ± 27% | V p-p | For sine and cosine inputs | ||
| Excitation Frequency Range | 2 kHz | 20 kHz | kHz | Programmable |
Key Features
- Ratiometric Tracking Conversion: The Type II tracking loop provides continuous output position data without conversion delay, ensuring noise immunity and tolerance of harmonic distortion on the reference and input signals.
- System Fault Detection: A fault detection circuit 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 by the user.
- Programmable Excitation Frequency: Excitation frequency is easily programmable to a number of standard frequencies between 2 kHz and 20 kHz.
- Triple Format Position Data: Absolute 10-bit to 16-bit angular position data is accessed via either a 16-bit parallel port or a 4-wire serial interface. Incremental encoder emulation is in standard A-quad-B format with direction output available.
- Digital Velocity Output: 10-bit to 16-bit signed digital velocity accessed via either a 16-bit parallel port or a 4-wire serial peripheral interface (SPI).
Applications
- DC and AC Servo Motor Control: The AD2S1210ASTZ is used in precise motor control applications where accurate position and velocity feedback are critical.
- Encoder Emulation: It can emulate incremental encoders, making it versatile for various industrial and automotive applications.
- Electric Power Steering and Electric Vehicles: The device is suitable for use in electric power steering systems and electric vehicles due to its high reliability and precision.
- Integrated Starter Generators and Alternators: It is used in integrated starter generators and alternators for precise control and monitoring.
- Automotive Motion Sensing and Control: The AD2S1210ASTZ is AEC-Q100 qualified and has an ASIL B safety assessment certificate, making it ideal for automotive motion sensing and control applications.
Q & A
- What is the resolution range of the AD2S1210ASTZ?
The AD2S1210ASTZ offers a resolution range from 10-bit to 16-bit. - What is the operating temperature range of the AD2S1210ASTZ?
The operating temperature range is from -40°C to +125°C. - What are the input signal range and frequency for the AD2S1210ASTZ?
The input signal range is 3.15 V p-p ± 27%, and the frequency range is from 2 kHz to 20 kHz. - Does the AD2S1210ASTZ support fault detection?
Yes, it includes a fault detection circuit that can sense various faults such as loss of resolver signals or out-of-range input signals. - What are the primary applications of the AD2S1210ASTZ?
The primary applications include DC and AC servo motor control, encoder emulation, electric power steering, electric vehicles, integrated starter generators and alternators, and automotive motion sensing and control. - Is the AD2S1210ASTZ qualified for automotive safety standards?
Yes, it is AEC-Q100 qualified and has an ASIL B safety assessment certificate. - What interfaces does the AD2S1210ASTZ support for data output?
The device supports both 16-bit parallel port and 4-wire serial peripheral interface (SPI) for data output. - Can the excitation frequency be programmed?
Yes, the excitation frequency is programmable to various standard frequencies between 2 kHz and 20 kHz. - What is the maximum tracking rate of the AD2S1210ASTZ?
The maximum tracking rate is 3125 rps for 10-bit resolution with CLKIN = 10.24 MHz. - How does the AD2S1210ASTZ handle harmonic distortion?
The Type II tracking loop provides noise immunity and tolerance of harmonic distortion on the reference and input signals.
