Angle Sensor - AKM
Description
[EM3242]
Applications
□ Small absolute rotary encoder □ Small input device (mode selector, volume control, and soon) □ Potentiometer □ Rotary switch
EM3242
Angle Sensor IC
Features
□ Si monolithic rotary position sensor IC with embedded Hall devices □ Contactless rotary position sensor is easily implemented with magnetic disc (radial magnetic) and sensor IC.
□ Analog ratiometric output (10%VDD～90%VDD) □ 10 bit Angular Resolution □ 3V single power supply □ Extremely small temperature drift (typ.
+/-1.
0 degree) □ Ambient operating temperature range: Ta=-40 to 150ºC □ Package: SOP6 body size 3.
6×3.
0×0.
95mm
HE X
HE
HE Y
HE
Preamp
Block Diagram
VDD
VSS
Angle detection (Mixed signal processing circuit)
10bit DAC
Buffer
Sine wave ROM
AOUT
TSTA TSTB
PDN
2>
－1－
April, 2013
[EM3242]
Block name
HE
PreAmp Angle Detection
& Sine Wave ROM
DAC
Functional Blocks
Function Hall Elements.
These detect X/Y-compositions of flux which is parallel to the IC package surface by using magnetic concentrator.
This is able to amplify signals from Hall elements.
Angle Detection makes digital angle data from signals from Hall Elements using Sine Wave ROM.
Digital to analog converter for angle output.
No.
Symbol 1 TSTB 2 VSS 3 PDN 4 AOUT
5 VDD
6 TSTA
PIN Description
I/O Type
Function
I/O
Analog/Digital
TEST dedicated PIN, which should be connected to the GND in use.
-
Power
Ground PIN.
I
Analog
Power down PIN.
IC is active in the case that PDN is High.
IC is power down in the case that PDN is Low.
O
Analog
Analog output PIN for angle data.
CL: max.
200pF（pull-down）
Power Supply PIN.
0.
1uF Ceramic Capacitor is required between
-
Power
Vss for stabilization.
If Capacitor has magnetism, separate it
around 10mm from IC.
I/O
Analog
TEST dedicated PIN, which should be connected to the GND in use.
Application Circuit
Analog Voltage Output
Power SuppAlynalog Voltage Output VDD(2.
7V-3.
3V)
0.
1F
Locate close to IC
4:AOUT PDN:3 5:VDD VSS:2 6...
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