AS5045 12-BIT PROGRAMMABLE MAGNETIC ROTARY ENCODER
Adapter PCB Operation Manual
Revision A.02, 14-Mar-07 www.austriamicrosystems.com
Page 2 of 12
2
General Description
The AS5045 is a system-on-chip, combining
integrated Hall elements, analog front end and
digital signal processing in a single device. It
provides incremental output signals and the
absolute angular position of a magnet that is placed
either above or below the device.
The AS5045 can be configured to specific customer
requirements by programming the integrated OTP
(one time programmable) register. An internal
voltage regulator allows the AS5045 to operate at
either 3.3 V or 5 V supplies.
Figure 2: Typical arrangement AS5045 and magnet
3
Pin Configuration
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1
MagINCn
MagDECn
NC
NC
NC
Mode
VSS
Prog_DI
DO
CLK
CSn
PWM
NC
NC
VDD3V3
VDD5V
AS5045
Figure 3: Pin configuration SSOP16
4
Pin Description
P
P
i
i
n
n
S
S
y
y
m
m
b
b
o
o
l
l
T
T
y
y
p
p
e
e
D
D
e
e
s
s
c
c
r
r
i
i
p
p
t
t
i
i
o
o
n
n
1
MagINCn
DO_OD
Magnet Field Magnitude INCrease;
active low, indicates a distance
reduction between the magnet and
the device surface. See Error!
Reference source not found.
2 MagDECn DO_OD
Magnet Field Magnitude DECrease;
active low, indicates a distance
increase between the device and the
magnet. See Error! Reference
source not found.
3
NC
-
must be left unconnected
4
NC
-
must be left unconnected
5
NC
-
must be left unconnected
6 Mode
-
select between slow (open, low :VSS)
and fast (high) mode. Internal pull-
down resistor.
7
VSS
S
Negative Supply Voltage (GND)
8 Prog_DI DI_PD
OTP Programming Input and Data
Input for Daisy Chain mode. Internal
pull-down resistor (~74k
Ω
).
Connect to VSS if 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
(~50k
Ω
)
12 PWM
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, internally
regulated from VDD5V.Connect to
VDD5V for 3V supply voltage. Do not
load externally.
16
VDD5V
S
Positive Supply Voltage, 3.0 to 5.5 V
Table 1: Pin description
ams
AG
Technical
content
still
valid
