AS5040 Просмотр технического описания (PDF) - austriamicrosystems AG
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AS5040 Datasheet PDF : 33 Pages
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AS5040
Data Sheet
Table 2 Pin Description SSOP16
Pin
Symbol
Type
Description
1
MagINCn
DO_OD
Magnet Field Magnitude INCrease; active low, indicates a distance
reduction between the magnet and the device surface.
2
MagDECn
DO_OD
Magnet Field Magnitude DECrease; active low, indicates a distance
increase between the device and the magnet.
3
A_LSB_U
Mode1.x: Quadrature A channel
DO
Mode2.x: Least Significant Bit
Mode3.x: U signal (phase1)
4
B_Dir_V
Mode1.x: Quadrature B channel quarter period shift to channel A.
DO
Mode2.x: Direction of Rotation
Mode3.x: V signal (phase2)
5
NC
-
Must be left unconnected
6
Index_W
DO
Mode1.x and Mode2.x : Index signal indicates the absolute zero position
Mode3.x: W signal (phase3)
7
VSS
S
Negative Supply Voltage (GND)
8
OTP Programming Input and Data Input for Daisy Chain mode. Internal
Prog
DI_PD pull-down resistor (~74kΩ).
May be connected to VSS if programming is not used
9
DO
DO_T Data Output of Synchronous Serial Interface
10
CLK
DI, ST Clock Input of Synchronous Serial Interface; Schmitt-Trigger input
11
CSn
DI_PU, ST
Chip Select, active low; Schmitt-Trigger input, internal pull-up resistor
(~50kΩ) connect to VSS in incremental mode (see 0)
12
PWM_LSB
DO
Pulse Width Modulation of approx. 1kHz; LSB in Mode3.x
13
NC
-
Must be left unconnected
14
NC
-
Must be left unconnected
15
VDD3V3
S
3V-Regulator Output (see Figure 19)
16
VDD5V
S
Positive Supply Voltage 5 V
DO_OD
DO
DI_PD
DI_PU
digital output open drain
digital output
digital input pull-down
digital input pull-up
S
DI
DO_T
ST
supply pin
digital input
digital output /tri-state
Schmitt-Trigger input
Mode 3.x: Brushless DC Motor Commutation Mode
In addition to the absolute encoder output over the SSI interface, this mode provides commutation signals for
brushless 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 AS5040 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.
Pin 8 (Prog) is also used to program the different incremental interface modes, the incremental resolution and the
zero position into the OTP (see page 18).
This pin is also used as digital input to shift serial data through the device in Daisy Chain configuration,
(see page 11).
Pin 11 Chip Select (CSn; active low) selects a device within a network of AS5040 encoders and initiates serial data
transfer. A logic high at CSn puts the data output pin (DO) to tri-state and terminates serial data transfer. This pin is
also used for alignment mode (page 21) and programming mode (page 16).
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Revision 2.10
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