AS5045-ASST austriamicrosystems, AS5045-ASST Datasheet - Page 15

• Manufacturer Part Number: AS5045-ASST
• Description: IC ENCODER PROG 12-BIT 16-SSOP
• Manufacturer: austriamicrosystems
• Type: Linear, Rotary Encoder - Programmabler

Specifications of AS5045-ASST

• Sensing Range: 45mT ~ 75mT
• Voltage - Supply: 3 V ~ 3.6 V, 4.5 V ~ 5.5 V
• Current - Supply: 21mA
• Current - Output (max): 4mA
• Output Type: Digital, PWM, 12-Bit Serial
• Features: Programmable
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 16-SSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: AS5045-ASSTTR

AS5045
Data Sheet
Table 5. Magnetic Field Strength Red-yellow-green Indicator (OTP option)
Note: Pin 1 (MagINCn) and pin 2 (MagDECn) are active low via open drain output and require an external pull-up
resistor. If the magnetic field is in range, both outputs are turned off.
The two pins may also be combined with a single pull-up resistor. In this case, the signal is high when the magnetic
field is in range. It is low in all other cases (see Table 4 and Table 5).
8.2 Daisy Chain Mode
The Daisy Chain mode allows connection of several AS5045’s in series, while still keeping just one digital input for
data transfer (see “Data IN” in Figure 6 below). This mode is accomplished by connecting the data output (DO; pin 9)
to the data input (PROG; pin 8) of the subsequent device. An RC filter must be implemented between each PROG
pin of device n and DO pin of device n+1, to prevent then encoders to enter the alignment mode, in case of ESD
discharge, long cables, not conform signal levels or shape. Using the values R=100R and C=1nF allow a max. CLK
frequency of 1MHz on the whole chain. The serial data of all connected devices is read from the DO pin of the first
device in the chain. The length of the serial bit stream increases with every connected device, it is
The last data bit of the first device (Parity) is followed by a dummy bit and the first data bit of the second device
(D11), etc… (see Figure 7)
Figure 6. Daisy Chain Hardware Configuration
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Mag
All other combinations
INC
0
1
1
Status Bits
n * (18+1) bits:
e.g. 38 bit for two devices, 57 bit for three devices, etc…
DEC
Mag
0
1
1
LIN
0
0
1
Hardware Pins
INCn
Mag
n/a
Off
On
On
DECn
Mag
n/a
Off
Off
On
OTP: Mag CompEn = 1 (red-yellow-green programming
option)
Description
No distance change
Magnetic input field OK (GREEN range, ~45…75mT)
YELLOW range: magnetic field is ~ 25…45mT or ~75…135mT. The
AS5045 may still be operated in this range, but with slightly reduced
accuracy.
RED range: magnetic field is ~<25mT or >~135mT. It is still possible to
operate the AS5045 in the red range, but not recommended.
Not available
Revision 1.7
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