AK9720 Datasheet, PDF (3/31 Pages) Asahi Kasei Microsystems – IR Sensor Module with I2C I/F

[AK9720]
1. Block Diagram
Block Diagram
VSS
VDD
DVDD
SOUT
TEMPERATURE
PD
TIA
PREAMP
COMPENSATION
MUX/ADC
I²C
INTERFACE
POR
TEMPERATURE
SENSOR
EEPROM
OSC
INT
SCL
SDA
CAD0
CAD1
TOUT
2. Block Functions
Block
PD
I/V
PREAMP
TEMPERATURE
COMPENSATION
TEMPERATURE
SENSOR
MUX／ADC
I²C Interface
EEPROM
OSC
POR
Functions
IR1011 IR sensor core
Photocurrent of IR sensor is converted to voltage
Programmable gain amplifier to adjust the output level. Gain can
also be adjusted by register settings.
Preamp output is compensated for the ambient temperature and
linearized.
Built-in Temperature Sensor
Preamp output, linearized output, and built-in temperature sensor
output are multiplexed prior to the ADC.
Interface to external host controller
A flag is set when the measurement data is ready to be read.
SCL and SDA pins are provided for I2C interface. The interface
operates up to 400kHz rate and down to 1.65V low voltage condition.
EEPROM. Compensation data is stored in this non-volatile memory.
Internal oscillator
Power on reset
Rev.02
AKM Confidential
-3-
2012/11