as5140 austriamicrosystems, as5140 Datasheet
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as5140 Summary of contents
Page 1
... An internal voltage regulator allows the AS5140H to operate at either 3 supplies. The AS5140H is pin-compatible to the AS5040; however it uses low-voltage OTP programming cells with additional programming options. Figure 1: Typical arrangement of AS5140H and magnet 1.1 Applications Automotive applications: - Engine compartment sensors ...
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... DC motors with either one pole pair or two pole pair rotors. The commutation signals are usually provided by 3 discrete Hall switches, which are no longer required, as the AS5140H can fulfill two tasks in parallel: absolute encoder + BLDC motor commutation. In this mode, pin 12 provides the LSB output instead of the PWM (Pulse-Width-Modulation) signal ...
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... A/B mode including the Index signal with a pulse width of 1 LSB. The Index signal is logic high at the user programmable zero position. The AS5140H is tolerant to magnet misalignment and magnetic stray fields due to differential measurement technique and Hall sensor conditioning circuitry. VDDV3V ...
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... Offset Compensation Algorithm. For fast startup, this bit may be polled by the external microcontroller. As soon as this bit is set, the AS5140H has completed the startup and the data is valid (see Table 4) COF (Cordic Overflow), logic high indicates an out of range error in the CORDIC part. When this bit is set, the data at D9:D0 is invalid ...
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... Revision 1.1, 02-03-2007 4.2 Daisy Chain Mode The Daisy Chain mode allows connection of several AS5140H’s in series, while still keeping just one digital input for data transfer (see “Data IN” in Figure 5 below). This mode is accomplished by connecting the data output Parity (DO; pin 9) to the data input (Prog; pin 8) of the subsequent device ...
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... AS5140H 10-BIT PROGRAMMABLE MAGNETIC ROTARY ENCODER CSn t T CLK FE CLK/2 1 CLK Angular Position Data DO active DO valid 5 Incremental Outputs Three different incremental output modes are possible with quadrature A/B being the default mode. Figure 7 shows the two-channel quadrature as well as ...
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... Instead of waiting for the specified maximum power up-time (0), the controller can start requesting data from the AS5140H as soon as the state (A=B=Index = high) is cleared. CSn = high or open at power-up: In this mode, the incremental outputs (A, B, Index) will remain at logic high state, until CSn goes low or a low pulse is applied at CSn ...
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... Analog Output An analog output may be generated by averaging the PWM signal, using an external active or passive lowpass filter. The analog output voltage is proportional to the angle: 0°= 0V; 360° = VDD5V. Using this method, the AS5140H can be used as direct replacement of potentiometers analog out Pin12 ...
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... Application Note AN5000-30, which can be downloaded from the austriamicrosystems website. programming description in this datasheet is for general information only. After power-on, programming the AS5140H is enabled with the rising edge of CSn with Prog = high and CLK = low. The AS5140H programming is a one-time-programming (OTP) method, ...
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... PROG CLK Operation Mode Selection Figure 13:OTP access timing diagram Revision 1.1, 02-03-2007 9.2 User selectable settings The AS5140H allows programming of the following user selectable options: Md1, Md0 Incremental Output Mode Selection Div1,Div0 Divider Setting of Incremental Output Index Index Pulse Width Selection: 1LSB / 3LSB ...
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... In both modes, the incremental resolution may be reduced from 10 bit down bit using the divider OTP bits Div1 and Div0. (see Table 7 below ). Mode: Md1=1 / Md0=1 sets the AS5140H in brushless DC motor commutation mode with an additional LSB incremental signal at pin 12 (PWM_LSB). ...
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... AS5140H 10-BIT PROGRAMMABLE MAGNETIC ROTARY ENCODER 9.7 Zero Position Programming Zero position programming is an OTP option that simplifies assembly of a system, as the magnet does not need to be manually adjusted to the mechanical zero position. Once the assembly is completed, mechanical and electrical zero positions can be matched by software ...
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... AS5140H 10-BIT PROGRAMMABLE MAGNETIC ROTARY ENCODER 11 3. Operation The AS5140H operates either at 3.3V ±10 ±10%. This is made possible by an internal 3.3V Low- Dropout (LDO) voltage regulator. The internal supply voltage is always taken from the output of the LDO, meaning that the internal blocks are always operating at 3 ...
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... AS5140H 10-BIT PROGRAMMABLE MAGNETIC ROTARY ENCODER 12 Choosing the Proper Magnet Typically the magnet should be 6mm in diameter and ≥2.5mm in height. Magnetic materials such as rare earth AlNiCo, SmCo5 or NdFeB are recommended. The magnet’s field strength perpendicular to the die surface should be verified using a gauss-meter. The ...
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... Figure 20: Arrangement of Hall sensor array on chip (principle) With reference to Figure 20, a diametrically magnetized permanent magnet is placed above or below the surface of the AS5140H. The chip uses an array of Hall sensors to sample the vertical vector of a magnetic field distributed across the device package surface. The area of magnetic sensitivity is a circular locus of 1 ...
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... AS5140H 10-BIT PROGRAMMABLE MAGNETIC ROTARY ENCODER supply to the AS5140H, the pull-up resistors (>10kΩ) from each pin must be connected to the positive supply at pin 16 (VDD5V). By hardware: PWM output: The PWM output is a constant stream of pulses with 1kHz repetition frequency. In case of power loss, these pulses are missing. ...
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... High Speed Operation 15.3.1 Sampling Rate The AS5140H samples the angular value at a rate of 10.42k samples per second. Consequently, the incremental, as well as the absolute outputs are updated each 96µ stationary position of the magnet, this sampling rate creates no additional error. ...
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... Temperature 15.6.1 Magnetic Temperature Coefficient One of the major benefits of the AS5140H compared to linear Hall sensors is that it is much less sensitive to temperature. While linear Hall sensors require a compensation of the magnet’s temperature coefficient, the AS5140H automatically compensates for the varying magnetic field strength over temperature. The magnet’s ...
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... AS5140H 10-BIT PROGRAMMABLE MAGNETIC ROTARY ENCODER 16 Electrical Characteristics 16.1 AS5140H Differences to AS5040 The AS5140H and the AS5040 differ in the following features: Parameter AS5140H Pin - assignment Ambient -40°C ……+150°C temperature range Alignment mode Exit alignment mode by power-on-reset , Exit alignment mode by POR or with PROG= ...
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... AS5140H 10-BIT PROGRAMMABLE MAGNETIC ROTARY ENCODER 16.3 Automotive Qualification The AS5140H is fully automotive qualified according to AEC-Q100, grade 0 16.4 Operating Conditions Parameter Ambient temperature Supply current External supply voltage at pin VDD5V Internal regulator output voltage at pin VDD3V3 External supply voltage at pin VDD5V ,VDD3V3 External VDD3V3 supply voltage rise time at power-up 16 ...
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... AS5140H 10-BIT PROGRAMMABLE MAGNETIC ROTARY ENCODER 16.5.4 CMOS Output Index, PWM (operating conditions -40 to +150°C, VDD5V = 3.0-3.6V (3V operation) VDD5V = 4.5-5.5V (5V operation) unless otherwise noted Parameter High level output voltage Low level output voltage Output current 16.5.5 Tristate CMOS Output: DO (operating conditions -40 to +150°C, VDD5V = 3.0-3.6V (3V operation) VDD5V = 4.5-5.5V (5V operation) unless otherwise noted) ...
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... AS5140H 10-BIT PROGRAMMABLE MAGNETIC ROTARY ENCODER 16.7 Electrical System Specifications (operating conditions -40 to +150°C, VDD5V = 3.0-3.6V (3V operation) VDD5V = 4.5-5.5V (5V operation) unless otherwise noted Parameter Symbol Resolution RES 7 bit 8 bit LSB 9 bit 10 bit Integral non-linearity (optimum) INL opt Integral non-linearity (optimum) INL temp ...
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... AS5140H 10-BIT PROGRAMMABLE MAGNETIC ROTARY ENCODER Integral Non-Linearity (INL) is the maximum deviation between actual position and indicated position. Differential Non-Linearity (DNL) is the maximum deviation of the step length from one position to the next. Transition Noise (TN) is the repeatability of an indicated position. 16.8 Timing Characteristics ...
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... AS5140H 10-BIT PROGRAMMABLE MAGNETIC ROTARY ENCODER 16.9 Programming Conditions (operating conditions -40 to +150°C, VDD5V = 3.0-3.6V (3V operation) VDD5V = 4.5-5.5V (5V operation) unless otherwise noted Programming voltage Programming voltage off level V Programming current Programmed fuse resistance (log 1) ...
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... AS5140H 10-BIT PROGRAMMABLE MAGNETIC ROTARY ENCODER 17 Package Drawings and Markings 16-Lead Shrink Small Outline Package SSOP-16 AYWWIZZ AS5140H Dimensions mm Symbol Min Typ Max Min A 1.73 1.86 1.99 .068 A1 0.05 0.13 0.21 .002 A2 1.68 1.73 1.78 .066 b 0.25 0.315 0.38 .010 c 0.09 - 0.20 .004 D 6.07 6.20 6.33 .239 E 7.65 7.8 7.9 .301 E1 5.2 5.3 5.38 .205 e 0.65 K 0° - 8° 0° L 0.63 0.75 0.95 .025 18 Packing Options Delivery: Tape and Reel (1 reel = 2000 devices) Tubes (1 box = 100 tubes à ...
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... AS5140H 10-BIT PROGRAMMABLE MAGNETIC ROTARY ENCODER 19 Recommended PCB Footprint 20 Revision History Revision Date Initial revision 1.0 Oct. 3, 2006 21 Contact 21.1 Headquarters austriamicrosystems AG Fax: +43 3136 525 01 info@austriamicrosystems.com?subject=AS5140H www.austriamicrosystems.com A 8141 Schloss Premstätten, Austria Phone: +43 3136 500 0 Copyright Devices sold by austriamicrosystems are covered by the warranty and patent indemnification provisions appearing in its Term of Sale. ...