AS5045ASSU austriamicrosystems, AS5045ASSU Datasheet - Page 2

• Manufacturer Part Number: AS5045ASSU
• Description: IC, MAGNETIC ROTARY ENCODER 12BIT SSOP16
• Manufacturer: austriamicrosystems

Specifications of AS5045ASSU

• Ic Function: Encoder IC
• Supply Voltage Range: 3V To 3.6V, 4.5V To 5.5V
• Operating Temperature Range: -40°C To +125°C
• Digital Ic Case Style: SSOP
• No. Of Pins: 16
• Msl: MSL 3 - 168 Hours
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AS5045 12-BIT PROGRAMMABLE MAGNETIC ROTARY ENCODER
2
2.1
Table 1 shows the description of each pin of the standard
SSOP16 package (Shrink Small Outline Package, 16
leads, body size: 5.3mm x 6.2mmm; see Figure 2).
Pins 7, 15 and 16 supply pins, pins 3, 4, 5, 6, 13 and 14
are for internal use and must not be connected.
Pins 1 and 2 MagINCn and MagDECn are the magnetic
field change indicators (magnetic field strength increase
or decrease through variation of the distance between
the magnet and the device). These outputs can be used
to detect the valid magnetic field range. Furthermore
those indicators can also be used for contact-less push-
button functionality.
Pin 6 Mode allows switching between filtered (slow) and
unfiltered (fast mode). This pin must be tied to VSS or
VDD5V, and must not be switched after power up. See
section 5.
Revision 1.5
Pin
1
2
3
4
5
6
7
8
9
MagDECn
MagINCn
Prog_DI
Pin Configuration
Mode
Symbol
MagINCn
MagDECn
NC
NC
NC
Mode
VSS
Prog_DI
DO
VSS
NC
NC
Pin Description
NC
Figure 2: Pin configuration SSOP16
1
2
3
4
5
6
7
8
Type
DO_OD
DO_OD
-
-
-
-
S
DI_PD
DO_T
Description
Magnet Field Magnitude INCrease;
active low, indicates a distance
reduction between the magnet and
the device surface. See Table 5
Magnet Field Magnitude DECrease;
active low, indicates a distance
increase between the device and the
magnet. See Table 5
Must be left unconnected
Must be left unconnected
Must be left unconnected
Select between slow (low, VSS) and
fast (high, VDD5V) mode. Internal
pull-down resistor.
Negative Supply Voltage (GND)
OTP Programming Input and Data
Input for Daisy Chain mode. Internal
pull-down resistor (~74kΩ).
Connect to VSS if not used
Data Output of
Synchronous Serial Interface
16
15
14
13
12
10
11
9
VDD5V
VDD3V3
NC
NC
PWM
CSn
CLK
DO
www.austriamicrosystems.com
DO_OD
DO
DI_PD
DI_PU
Pin 8 Prog is used to program the zero-position into the
OTP (see chapter 8.1).
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 AS5045 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 (Figure 14) and
programming mode (Figure 10).
Pin 12 PWM allows a single wire output of the 10-bit
absolute position value. The value is encoded into a
pulse width modulated signal with 1µs pulse width per
step (1µs to 4096µs over a full turn). By using an
external low pass filter, the digital PWM signal is
converted into an analog voltage, making a direct
replacement of potentiometers possible.
Pin
10
11
12
13
14
15
16
Symbol
CLK
CSn
PWM
NC
NC
VDD3V3
VDD5V
digital output open drain
digital output
digital input pull-down
digital input pull-up
Table 1: Pin description SSOP16
Type
DI,
ST
DI_PU,
ST
DO
-
-
S
S
3V-Regulator Output, internally
regulated from VDD5V. Connect to
VDD5V for 3V supply voltage. Do not
load externally.
Description
Clock Input of
Synchronous Serial Interface;
Schmitt-Trigger input
Chip Select, active low; Schmitt-
Trigger input, internal pull-up resistor
(~50kΩ)
Pulse Width Modulation of approx.
244Hz; 1µs/step
(opt. 122Hz; 2µs/step)
Must be left unconnected
Must be left unconnected
Positive Supply Voltage, 3.0 to 5.5 V
S
DI
DO_T digital output /tri-state
ST
supply pin
digital input
Schmitt-Trigger input
Page 2 of 24