AS5046ASSU austriamicrosystems, AS5046ASSU Datasheet - Page 14

• 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
9.4
The analog signals on the SIN- and COS- buses are converted into a signed 12-bit digital value by two ADC’s, one for each
bus.
To read the signal from one or more Hall Sensors, first assign a signal bus (SIN, COS) for each Hall Sensor in the Hall
Sensor front-end and then read the corresponding amplitude value from the ADC output register.
9.5
The Automatic Gain Control is active in the “green” range of the magnetic field, when the magnetic field is within
~35…63mT. If the magnetic field is too low, e.g. when the magnet is too far away from the chip, the AGC register will be
FF
Automatic Gain control can be disabled by writing a value into this register. It will be enabled by reading from this register.
The AGC tries to maintain a constant magnitude value of 3F
value can no longer be maintained ad 3F
Revision 1.1
Addr. 000
Type ID: 0111
H
Type ID:
, if the magnetic field is too strong, e.g. when the magnet is too close to the chip, the AGC register will be 00
0100
Addr. 000
Analog-Digital Converter Outputs, SIN/COS Signal Bus (Type ID: 0100)
Note that the ADC’s are 14-bit (see Block diagram, Figure 2), but only 12-bit are available to the user. The available
12-bit ADC output is again split into an upper 8-bit block (available in bytes 1 & 2) and a lower 4-bit block in byte 3.
The resulting 12-bit value is formatted as a signed 12-bit value and has a range from -2048…+2047 (decimal). Bit 11
(MSB) is the sign bit; if this bit is set, the Sin/Cos value is negative.
Automatic Gain Control Register (Type ID: 0111)
11
12-bit ADC output: COS signal bus
AGC7
10
9
Upper 8 bits
AGC6
Byte 1
8
7
AGC5
6
H
and will also change accordingly (see 9.1.3 and 9.6).
5
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AGC5
4
11
Byte 1
12-bit ADC output: SIN signal bus
AGC3
10
H
. If the AGC has reached its upper or lower limit, the magnitude
9
Upper 8 bits
AGC2
Byte 2
8
7
AGC1
6
5
AGC0
4
3
COS signal bus
Lower 4 bits
2
1
Byte 3
0
3
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SIN signal bus
Lower 4 bits
2
H
. The
1
0