AS5311-ASST austriamicrosystems, AS5311-ASST Datasheet - Page 13

• Manufacturer Part Number: AS5311-ASST
• Description: IC ENCODER LINEAR 20-TSSOP
• Manufacturer: austriamicrosystems
• Type: Linear, Rotary Encoder - Programmabler

Specifications of AS5311-ASST

• 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
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 20-TSSOP (0.173", 4.40mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Sensing Range: -
• Features: -

AS5311
Data Sheet
A value of zero or close to zero indicates a missing magnet.
Figure 9. Synchronous Serial Interface with Magnetic Field Strength Data
If CSn changes to logic low, Data Out (DO) will change from high impedance (tri-state) to logic high and the
read-out will be initiated.
7.3.1
Data D11:D0 is valid, when the status bits have the following configurations:
Table 4. Status Bit Outputs
*) MagInc=MagDec=1 is only recommended in YELLOW mode (see Table 5)
www.austriamicrosystems.com
OCF
1
D11:D0
M11:M0
OCF ( O ffset C ompensation F inished), logic high indicates the finished Offset Compensation Algorithm
COF ( C ordic O ver f low), logic high indicates an out of range error in the CORDIC part. When this bit is set,
the data at D11:D0 (likewise M11:M0) is invalid.
This alarm may be resolved by bringing the magnet within the X-Y-Z tolerance limits.
LIN ( Lin earity Alarm), logic high indicates that the input field generates a critical output linearity.
When this bit is set, the data at D11:D0 may still be used, but can contain invalid data. This warning can be
resolved by increasing the magnetic field strength.
Even Parity bit for transmission error detection of bits 1…17 (D11…D0, OCF, COF, LIN, MagINC, MagDEC)
After a minimum time t
Each subsequent rising CLK edge shifts out one bit of data.
The serial word contains 18 bits, if CLK is high at the falling edge of CSn (Figure 8), the first 12 bits are the
absolute distance information D[11:0], the subsequent 6 bits contain system information, about the validity
of data such as OCF, COF, LIN, Parity and Magnetic Field status (increase/decrease).
If CLK is low at the falling edge of CSn (Figure 9), the first 12 bits contain the magnitude information
(range = 00…7F hex) and the subsequent bits contain the status bits (see above)
A subsequent measurement is initiated by a “high” pulse at CSn with a minimum duration of t
Data Contents
COF
0
LIN
0
CLK FE,
Mag
INC
1*)
data is latched into the output shift register with the first falling edge of CLK.
0
0
1
DEC
Mag
1*)
0
1
0
Revision 1.04
even checksum of bits 1:17
Parity
CSn
.
13 - 24