AK9752 Datasheet, PDF (4/36 Pages) Asahi Kasei Microsystems – Ultra-small IR sensor IC with IC

4.1. Block Diagram
4. Block Diagram and Functions
IR
IR
Sensor
AFE
OSC
POR
TSENS
ADC
Digital
Filter
Digital
I2C I/F
[AK9752]
SDA
SCL
INTN
VDD1
VDD2 VSS
Figure 4.1 AK9752 Block Diagram
4.2. Functions
Block
IR Sensor
OSC
TSENS
IR AFE
ADC
Digital Filter
I²C I/F
POR
Table 4.1 Functions
Function
IR sensor element.
Built-in Oscillator.
Built-in Temperature sensor.
Converting current from the IR sensor element into voltage signal. Also
cancelling offset of the sensor signal.
Convert analog outputs of IR AFE and TSENS into digital signals.
Digital filter (LPF) for ADC output. Cut-off frequency (Fc) is selectable.
Interface to external host MCU. SCL and SDA pins are provided for I²C
Interface.
Standard mode (100kHz) is supported in case of external pull-up voltage
VDD ~ 3.63V.
Fast mode (400kHz) is supported in case of external pull-up voltage VDD ~
1.95V.
Power on reset circuit.
016016473-E-00
-4-
2017/1