AS5046ASSU austriamicrosystems, AS5046ASSU Datasheet - Page 17

• Manufacturer Part Number: AS5046ASSU
• Description: IC, MAGNETIC ROTARY ENCODER 12BIT SSOP16
• Manufacturer: austriamicrosystems
• Type: Magnetic Rotary Encoderr

Specifications of AS5046ASSU

• 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
• Filter Terminals: SMD
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AS5046 Programmable 360° Magnetic Angle Encoder – Preliminary Data Sheet
Switching the MODE pin affects the following parameters:
Pin MODE should be fixed at power-up. A mode change during operation is not recommended.
Parallel Mode
The Parallel Mode allows connection of up to 8
AS5046’s in parallel on the SCL and SDA line,
maintaining just two wires for data transmission.
This mode is accomplished by connecting all the
SDA and SCL inputs/outputs in parallel. Each
AS5046 device can be programmed one address
ranging from 0…7 (see Table 2)
Note that the parallel connection has some restrictions:
11 Ratiometric Analog Angle Output
The analog output V
the supply voltage VDD5V (max.5.5V). It can source or sink currents up to ±1mA in normal operation (up to 66mA short
circuit current).
The analog output block consists of a digital angular range selector, a 10-bit Digital-to-Analog converter and an OPAMP
buffer stage (see Figure 17).
The digital range selector allows a preselection of the angular range for 360°, 180°, 90° or 45° (see Table 9). Fine-tuning of
the angular range can be accomplished by adjusting the gain of the OPAMP buffer stage.
The reference voltage for the Digital-to-Analog converter (DAC) can be taken internally from VDD5V / 2. In this mode, the
output voltage is ratiometric to the supply voltage.
Alternatively, an external DAC reference can be applied at pin DACref (#9). In this mode, the analog output is ratiometric to
the external reference voltage.
Revision 1.1
•
•
•
sampling rate
transition noise
(1 sigma)
propagation
delay
Startup time
Parameter
Each unit must be programmed to have a different address (ranging from 000 to 111; see Table 2)
Changing the address also changes the analog mode, as these OTP bits share the same position.(see Figure 13)
Only the SIU containing angle data and status bits can be read from parallel devices (type ID 0101). The other
registers all share the same type identifier (0001, 1011, 0111; see Table 2), which would lead to data collision
when trying to read any of these registers from parallel devices.
out
2.61 kHz
(383µs)
≤ 0.03° rms
384µs
20ms
Slow Mode
(Pin MODE = 0 or
open)
provides an analog voltage that is proportional to the angle of the rotating magnet and ratiometric to
10.42 kHz
≤ 0.06° rms
96µs
80ms
(95.9µs)
Fast Mode
(Pin MODE = 1)
www.austriamicrosystems.com
Table 8: Mode pin settings
µC
SDA
SCL
Figure 10: Parallel connection of up to 8 devices
SDA
AS5046
1
Addr. 000
st
Device
SCL
CSn
SDA
AS5046
2
Addr. 001
nd
Device
SCL
CSn
SDA
Page 17 of 33
AS5046
8
Addr. 111
th
Device
SCL
CSn