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Hello, Please ask a question about AS5245 Datasheet
# Example questions:
➢ What is the maximum allowable integral non-linearity (inl) over a temperature range of -40 to +150°c without calibration?
➢ What are the typical output current values for the 'a, b, index' outputs when vdd5v is 0v?
➢ What is the maximum clock frequency allowed for reading out serial data from the as5245?
1. Power Supply and General Operating Conditions
️· Supply Voltage (VDD5V):
- 3.0 to 3.6V (for 3V operation)
- 4.5 to 5.5V (for 5V operation)
️· Ambient Temperature (TAMB): -40 to +150°C
️· Fast Mode: MODE = 1
️· Slow Mode: MODE = 0 or open
2. Electrical Characteristics (Key Voltages & Currents)
️· VOH (High-Level Output Voltage): VDD5V - 0.5V (for various outputs - A, B, Index, DO, Tri-state DO)
️· VOL (Low-Level Output Voltage): VSS + 0.4V (for various outputs - A, B, Index, DO, Tri-state DO)
️· IO (Output Current): 4mA (at VDD5V = 4.5V, for various outputs – A, B, Index, DO, Tri-state DO) – 2mA (at VDD5V = 3V for the same outputs).
️· IOZ (Tri-state leakage current): 1µA (for Tri-state DO)
3. Timing Specifications
️· tPwrUp (Power-up Time):
- Fast Mode: 20 ms (until status bit OCF = 1)
- Slow Mode: 80 ms (until status bit OCF = 1)
️· tdelay (System Propagation Delay):
- Fast Mode: 96 µs (absolute output)
- Slow Mode: 384 µs (absolute output)
️· CLK/SEL (Read-out Frequency): Maximum 1 MHz
4. Input Specifications (Performance)
️· Resolution: 0.088 degrees (12-bit)
️· INLopt (Integral Non-linearity, Optimum): ±0.5 degrees (centered magnet, TAMB = 25°C, no calibration)
️· INLtemp (Integral non-linearity, Temperature): ±0.9 degrees (centered magnet, no calibration, TAMB = -40 to +150°C)
️· INL (Integral non-linearity): ±1.4 degrees (over displacement tolerance with 6mm magnet, no calibration, TAMB = -40 to +150°C)
️· DNL (Differential Non-linearity): ±0.044 degrees
️· TN (Transition Noise):
- Fast Mode: 0.06 degrees RMS
- Slow Mode: 0.03 degrees RMS
️· fS (Internal Sampling Rate):
- Fast Mode: 9.90 - 11.46 kHz (depending on temperature)
- Slow Mode: 2.35 - 2.87 kHz (depending on temperature)
Important Notes:
️· This is a summary of *excerpts*. The full datasheet contains many more specifications, including details on digital interfaces (SPI, etc.), status registers, magnetic sensor characteristics, and more.
️· Context Matters: The specific values and conditions (e.g., TAMB, magnet position, mode) significantly impact the performance. Always refer to the complete datasheet for accurate interpretation.
️· "Unless Otherwise Noted": Many specifications are qualified with "unless otherwise noted." This means the listed values may vary under different conditions.
️· OCF: The OCF status bit indicates power-up completion. It's crucial for proper initialization.
1. Power Supply and General Operating Conditions
️· Supply Voltage (VDD5V):
- 3.0 to 3.6V (for 3V operation)
- 4.5 to 5.5V (for 5V operation)
️· Ambient Temperature (TAMB): -40 to +150°C
️· Fast Mode: MODE = 1
️· Slow Mode: MODE = 0 or open
2. Electrical Characteristics (Key Voltages & Currents)
️· VOH (High-Level Output Voltage): VDD5V - 0.5V (for various outputs - A, B, Index, DO, Tri-state DO)
️· VOL (Low-Level Output Voltage): VSS + 0.4V (for various outputs - A, B, Index, DO, Tri-state DO)
️· IO (Output Current): 4mA (at VDD5V = 4.5V, for various outputs – A, B, Index, DO, Tri-state DO) – 2mA (at VDD5V = 3V for the same outputs).
️· IOZ (Tri-state leakage current): 1µA (for Tri-state DO)
3. Timing Specifications
️· tPwrUp (Power-up Time):
- Fast Mode: 20 ms (until status bit OCF = 1)
- Slow Mode: 80 ms (until status bit OCF = 1)
️· tdelay (System Propagation Delay):
- Fast Mode: 96 µs (absolute output)
- Slow Mode: 384 µs (absolute output)
️· CLK/SEL (Read-out Frequency): Maximum 1 MHz
4. Input Specifications (Performance)
️· Resolution: 0.088 degrees (12-bit)
️· INLopt (Integral Non-linearity, Optimum): ±0.5 degrees (centered magnet, TAMB = 25°C, no calibration)
️· INLtemp (Integral non-linearity, Temperature): ±0.9 degrees (centered magnet, no calibration, TAMB = -40 to +150°C)
️· INL (Integral non-linearity): ±1.4 degrees (over displacement tolerance with 6mm magnet, no calibration, TAMB = -40 to +150°C)
️· DNL (Differential Non-linearity): ±0.044 degrees
️· TN (Transition Noise):
- Fast Mode: 0.06 degrees RMS
- Slow Mode: 0.03 degrees RMS
️· fS (Internal Sampling Rate):
- Fast Mode: 9.90 - 11.46 kHz (depending on temperature)
- Slow Mode: 2.35 - 2.87 kHz (depending on temperature)
Important Notes:
️· This is a summary of *excerpts*. The full datasheet contains many more specifications, including details on digital interfaces (SPI, etc.), status registers, magnetic sensor characteristics, and more.
️· Context Matters: The specific values and conditions (e.g., TAMB, magnet position, mode) significantly impact the performance. Always refer to the complete datasheet for accurate interpretation.
️· "Unless Otherwise Noted": Many specifications are qualified with "unless otherwise noted." This means the listed values may vary under different conditions.
️· OCF: The OCF status bit indicates power-up completion. It's crucial for proper initialization.
| Part No. | AS5245 |
| Manufacturer | AMSCO |
| Size | 1Mb |
| Pages | 32 pages |
| Description | Programmable 360 Magnetic Angle Encoder with Absolute SSI and PWM Output |
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