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Hello, Please ask a question about AS5245HQFT Datasheet
# Example questions:
➢ What is the maximum allowable integral non-linearity (inl) over the full temperature range (-40 to +150°c) without calibration, using a 6mm diameter magnet?
➢ What is the typical pwm frequency, and what is the acceptable tolerance range for this frequency across the operating temperature range?
➢ What is the minimum pulse width for the pwm output signal at position 0 degrees, and what is the associated tolerance range?
1. Electrical Characteristics
️· Power Supply: Assumed to be 3.0-3.6V (3V operation) or 4.5-5.5V (5V operation).
️· Data Output Activated (tDOactive): 100ns.
️· First Data Shifted (tCLKFE): 500ns.
️· Data Output Valid (tDOvalid): 413ns.
️· Data Output Tri-state (tDOtristate): 100ns.
️· CSn Pulse Width: 500ns minimum.
️· Clock Frequency (fCLK): > 0 to 1 MHz.
️· PWM Frequency (fPWM): 224 Hz (typical), 220 - 3686Hz (min-max range).
️· LOAD Frequency (fLOAD): 500kHz
️· READ Frequency: 2.5MHz
️· WRITE Frequency: 2.5MHz
2. Magnetic Input Specification
️· Displacement Radius: 0.25mm
️· Eccentricity: 100µm
️· Magnet Material: NdFeB or SmCo.
️· Magnet Temperature Drift:
- NdFeB: -0.12%/K
- SmCo: -0.035%/K
3. System Specifications
️· Resolution: 12 bits (0.088 degrees)
️· Integral Non-Linearity (INL - Optimum): ±0.5 degrees (typical). ±0.9 degrees (across temperature range).
️· Differential Non-Linearity (DNL): ±0.044 degrees.
️· Transition Noise (TN):
- Fast Mode: 0.06 Deg RMS
- Slow Mode: 0.03 Deg RMS
️· Power-Up Time (tPwrUp): 20ms (Fast Mode), 80ms (Slow Mode)
️· System Propagation Delay (tdelay):
- Fast Mode: 96µs
- Slow Mode: 384µs
️· Internal Sampling Rate (fS):
- Slow Mode: 2.61kHz (typical at 25°C). 2.35 - 2.87 kHz (across temperature range).
- Fast Mode: 10.42kHz (typical at 25°C). 9.38 - 11.46 kHz (across temperature range).
️· Read-out frequency (CLK/SEL): 1MHz
4. Programming Conditions (Fuse Programming)
️· Programming Time per Bit (tPROG): 10-20µs
️· Refresh Time per Bit (tCHARGE): 1µs
️· Data Load Frequency (fLOAD): 500 kHz
️· Data Read Frequency: 2.5 MHz
️· Data Write Frequency: 2.5 MHz
Key Notes and Observations:
️· Modes: The AS5245 operates in Fast and Slow modes which affect timing and performance.
️· Temperature Dependence: Many parameters, especially those related to linearity and sampling rate, are temperature-dependent.
️· Data Sheet Limitations: This is an excerpt, so it likely doesn't cover everything. Full datasheet is recommended.
1. Electrical Characteristics
️· Power Supply: Assumed to be 3.0-3.6V (3V operation) or 4.5-5.5V (5V operation).
️· Data Output Activated (tDOactive): 100ns.
️· First Data Shifted (tCLKFE): 500ns.
️· Data Output Valid (tDOvalid): 413ns.
️· Data Output Tri-state (tDOtristate): 100ns.
️· CSn Pulse Width: 500ns minimum.
️· Clock Frequency (fCLK): > 0 to 1 MHz.
️· PWM Frequency (fPWM): 224 Hz (typical), 220 - 3686Hz (min-max range).
️· LOAD Frequency (fLOAD): 500kHz
️· READ Frequency: 2.5MHz
️· WRITE Frequency: 2.5MHz
2. Magnetic Input Specification
️· Displacement Radius: 0.25mm
️· Eccentricity: 100µm
️· Magnet Material: NdFeB or SmCo.
️· Magnet Temperature Drift:
- NdFeB: -0.12%/K
- SmCo: -0.035%/K
3. System Specifications
️· Resolution: 12 bits (0.088 degrees)
️· Integral Non-Linearity (INL - Optimum): ±0.5 degrees (typical). ±0.9 degrees (across temperature range).
️· Differential Non-Linearity (DNL): ±0.044 degrees.
️· Transition Noise (TN):
- Fast Mode: 0.06 Deg RMS
- Slow Mode: 0.03 Deg RMS
️· Power-Up Time (tPwrUp): 20ms (Fast Mode), 80ms (Slow Mode)
️· System Propagation Delay (tdelay):
- Fast Mode: 96µs
- Slow Mode: 384µs
️· Internal Sampling Rate (fS):
- Slow Mode: 2.61kHz (typical at 25°C). 2.35 - 2.87 kHz (across temperature range).
- Fast Mode: 10.42kHz (typical at 25°C). 9.38 - 11.46 kHz (across temperature range).
️· Read-out frequency (CLK/SEL): 1MHz
4. Programming Conditions (Fuse Programming)
️· Programming Time per Bit (tPROG): 10-20µs
️· Refresh Time per Bit (tCHARGE): 1µs
️· Data Load Frequency (fLOAD): 500 kHz
️· Data Read Frequency: 2.5 MHz
️· Data Write Frequency: 2.5 MHz
Key Notes and Observations:
️· Modes: The AS5245 operates in Fast and Slow modes which affect timing and performance.
️· Temperature Dependence: Many parameters, especially those related to linearity and sampling rate, are temperature-dependent.
️· Data Sheet Limitations: This is an excerpt, so it likely doesn't cover everything. Full datasheet is recommended.
| Part No. | AS5245HQFT |
| Manufacturer | AMSCO |
| Size | 904 Kbytes |
| Pages | 33 pages |
| Description | Programmable 360쨘 Magnetic Angle Encoder with Absolute SSI and PWM Output |
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