AS5046ASSU austriamicrosystems, AS5046ASSU Datasheet - Page 8

• 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
5.7
(operating conditions: T
otherwise noted)
6
The AS5046 is manufactured in a CMOS standard process and uses a spinning current Hall technology for sensing the
magnetic field distribution across the surface of the chip.
The integrated Hall elements are placed in a circle around the center of the device and deliver a voltage representation of
the magnetic field perpendicular to the surface of the IC.
Through Sigma-Delta Analog / Digital Conversion and Digital Signal-Processing (DSP) algorithms, the AS5046 provides
accurate high-resolution absolute angular position information. For this purpose a Coordinate Rotation Digital Computer
(CORDIC) calculates the angle and the magnitude of the Hall array signals.
The DSP is also used indicate movements of the magnet towards or away from the chip and to indicate, when the magnetic
field is outside of the recommended range (status bits = MagInc, MagDec; hardware pin = MagRngn). In addition, two 8-bit
registers are available that allow determination of the magnetic field strength over a wide range.
A small low cost diametrically magnetized (two-pole) standard magnet, centered over the chip, is used as the input device.
The AS5046 senses the orientation of the magnetic field and calculates a 12-bit binary code. This code can be accessed via
a bi-directional serial two-wire interface. In addition to the digital output, the absolute angle is converted into a 1024-step
(10-bit) analog signal, ratiometric to the supply voltage.
The analog output can be configured in many ways, such as 360°/180°/90° or 45° angular range, external or internal DAC
reference voltage, 0-100%*VDD or 10-90% *VDD analog output range, external or internal amplifier gain setting.
The various output modes as well as a user programmable zero position can be programmed in an OTP register. As long as
no programming voltage is applied to pin PROG, the new setting may be overwritten at any time and will be reset to default
when power is cycled. To make the setting permanent, the OTP register must be programmed by applying a programming
voltage.
Revision 1.1
Parameter
Programming enable time
Write data start
Write data valid
Load programming data
Rise time of V
Hold time of V
Write data – programming CLK
CLK pulse width
Hold
programming
Programming voltage
Programming voltage off level
Programming current
Analog read CLK
Programmed zener voltage (log.1)
Unprogrammed zener voltage (log. 0) V
Functional Description
Programming Conditions
time
PROG
PROG
of
before CLK
after CLK
Vprog
amb
= -40 to +125°C, VDD5V = 3.0-3.6V (3V operation) VDD5V = 4.5-5.5V (5V operation) unless
PROG
PROG
PROG
after
t
t
t
t
CLK
Symbol
PROG finished
V
unprogrammed
V
Data in valid
Load PROG
CLK
Prog enable
V
t
programmed
t
I
t
t
Data in
PROG
PROG
ProgOff
PrgR
PrgH
PROG
PROG
Aread
www.austriamicrosystems.com
Min
250
1.8
7.3
2
2
3
0
0
2
0
1
Typ
7.4
2
Max
250
130
2.2
7.5
100
100
5
1
Unit
kHz
mA
kHz
mV
µs
µs
µs
µs
µs
µs
µs
ns
V
V
V
Note
Time between rising edge at Prog
pin and rising edge of CSn
Write data at the rising edge of
CLK
During programming; 16 clock cycles
Programmed data is available after
next power-on
Must be switched off after zapping
Line must be discharged to this level
During programming
Analog readback mode
V
mode (see 13)
Ref
-V
PROG
PROG
during analog readback
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