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PDF AK9720 Data sheet ( Hoja de datos )
| Número de pieza | AK9720 | |
| Descripción | IR Sensor Module | |
| Fabricantes | AKM | |
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[AK9720]
AK9720 (Preliminary)
IR Sensor Module with I2C I/F
This specification is a design target, not guaranteed specifications for the final
product. Specifications are the subject to change without notice.
Description
The AK9720 is a slim and compact infrared-sensor module composed of a quantum IR
sensor and an integrated circuit for characteristic compensation. The IC generates an
analog signal that adjusts the infrared sensor’s offset and/or gain fluctuations and
temperature characteristics. An integrated analog-to-digital converter provides a 16-bit data
output. Additional integrated features include a field of view limiter structure and an optical
filter. The AK9720 enables new applications, including as remote temperature sensing,
stationary human detection, and proximity detection.
Features
Quantum-type IR sensor: IR1011 Core
Low voltage operation
VDD +1.71 to +3.63V
Digital I/F +1.65V to VDD
Low current consumption： 100uA typ. （@ 330ms sampling period ）
16bit-ADC output to I2C bus
⇒Digital output simplifies system integration
Fast response： TBD ms （@ sampling period）
Selectable output: temperature compensated signal or bypass signal
Integrated temperature sensor output
When the compensated signal is selected, the output has been adjusted for offset/gain
variation and temperature sensitivity of IR sensors:
=> Simplifies heat design
=> No host processing needed for temperature compensated output
Stationary human body detection algorithm available as reference software
Slim, compact package with field of view limiter structure and optical filter
⇒Simplifies optical design
Linear output correlated to target temperature
Settings (including ON/OFF control and sampling rate) programmed through I2C bus
Input level variations can be adjusted through a programmable gain stage
INT pin goes high when the ADC output is ready to read
⇒Can be used as read-trigger for single shot mode, or interrupt of signal level
monitoring.
Integrated power-on reset, and oscillator
10pin SON Package
Rev.02
AKM Confidential
-1-
2012/11
1 page  
[AK9720]
I2C Clock Input Pin
7
SCL
I
Signal processing is executed at rising edge and falling edge
of SCL clock. Therefore, observe rising time tR and falling
time tF.
8
DVDD
- Digital I/F Power Supply Pin
Analog Signal Output
SOUT is PREAMP output or temperature compensated IR
9
SOUT
O sensor output. SOUT should be connected to “Hi-Z” input.
LPF can be formed by the output resistance and an external
capacitor.
10 VSS - Ground pin
Rev.02
AKM Confidential
-5-
2012/11
5 Page 
[AK9720]
Digital Characteristics
1) EEPROM
Unless otherwise specified, VDD = 1.71 to 3.63V, DVDD = 1.65V to VDD;
Ta = -30 to +85C
Item
Code
Min.
Typ.
Max.
EEPROM retention time Ehold
@Ta=85C
10
2) DC Characteristics
Unless otherwise specified VDD = 1.71 to 3.63V, DVDD = 1.65 to VDD;
Ta = -30 to +85C
Unit
years
Parameter
Symbol
Conditions
Min.
Typ.
Max. Unit
Note
High Level Input
Voltage1
VIH1
80%DVDD
V CAD1,CAD0
Low Level Input
Voltage1
VIL1
20%DVD
D
V
CAD1,CAD0
High Level Input
Voltage2
VIH2
70%DVDD
DVDD+0.
5
V
SCL,SDA
Low Level Input
Voltage2
VIL2
-0.5
30%DVD
D
V
SCL,SDA
Hysteresis voltage
(Note)
VHS
DVDD>=2V
DVDD<2V
5%DVDD
10%DVDD
V SCL,SDA
V SCL,SDA
Low level output
voltage 1
VOL1
IOL = 3mA,
DVDD >=2V
- 0.4 V
SDA
High level output
voltage
VOH2
IOH = -200µA 80%DVDD
-
V INT
Low level output
voltage 2
VOL2
IOL = 200µA
- 0.4 V
INT
IDD1
Power down
mode
55 µA
Current
Consumption
IDD2
Normal mode
Operation
1.3 mA
IDD3
Bypass mode
Operation
1.0 mA
IDD4
Interval 1
（Normal mode）
800
µA
Min. Interval
(20ms)
Averaged Current
Consumption
( Interval Operation )
IDD5
IDD6
Interval 2
（Normal mode）
Interval 1
（Bypass mode）
110
µA
Max. Interval
(330ms)
560
µA
Min. Interval
(20ms)
IDD7
Interval 2
（Bypass mode）
80
µA
Max. Interval
(330ms)
(Note) Reference data only, not tested
Rev.02
AKM Confidential
- 11 -
2012/11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet AK9720.PDF ] | |
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