Sensor IC. AK9754 Datasheet

AK9754 Datasheet PDF


Part Number

AK9754

Description

Ultra-small IR Sensor IC

Manufacture

AKM

Total Page 30 Pages
Datasheet
Download AK9754 Datasheet


AK9754
[AK9754]
AK9754
Ultra-small IR Sensor IC with I2C I/F
1. General Description
The AK9754 is an ultra-low power and ultra-small quantum infrared-ray (IR) sensor module with signal
processing circuits and Human Approach Detection algorithm. It can detect a human approach and
outputs a signal from interrupt pins. An integral analog-to-digital converter provides 16-bits data outputs.
Human detection can be easily realized by using built-in Human Approach Detection algorithm. The
AK9754 is suitable for human sensing application.
2. Features
Quantum-type IR Sensor
Integrated Temperature Sensor: -30 to 85ºC Output on I2C bus
16-bits Digital Outputs to I2C Bus
Integrated Digital Filters:
IR Sensor:
Cut-off Frequency 0.9Hz, 0.445Hz
Temperature Sensor:
Cut-off Frequency 0.9Hz, 0.445Hz
* Only with 10Hz of Data Output Rate(ODR)
I2C Interface:
Support Standard mode(100Hz) and Fast modes(400Hz).
*Pull-up resistors must be connected to the same level as the power supply of the AK9754.
Multiple Synchronization Connection:
Eight devices can be connected in synchronization at maximum, and setting I2C bus slave
addresses for each.
Interrupt Function:
INTN pin goes to active when detecting a human approach or measurement data is ready to be
read.
Power Supply:
1.71 to 3.63V
Low Consumption Current:
10 µA (Max.) 10Hz of Data Output Rate (Low-noise Mode OFF)
5 µA (Typ.) 10Hz of Data Output Rate (Low-noise Mode OFF)
*TOPT[1:0] = 11B
Ultra-small and Thin Package:
8-pin SON
2.2mm x 2.2mm x t0.6mm
018006915-E-00
-1-
2018/06

AK9754
[AK9754]
3. Table of Contents
1. General Description................................................................................................................................ 1
2. Features ................................................................................................................................................. 1
3. Table of Contents ................................................................................................................................... 2
4. Block Diagram and Functions ................................................................................................................ 3
4.1. Block Diagram ................................................................................................................................. 3
4.2. Functions ......................................................................................................................................... 3
5. Pin Configurations and Functions .......................................................................................................... 4
5.1. Pin Configurations ........................................................................................................................... 4
5.2. Functions ......................................................................................................................................... 4
6. Absolute Maximum Ratings.................................................................................................................... 5
7. Recommended Operating Conditions.................................................................................................... 5
8. Power Supply Conditions ....................................................................................................................... 5
9. Electrical Characteristics ........................................................................................................................ 6
9.1. Total Characteristics ........................................................................................................................ 6
9.2. Digital Characteristics...................................................................................................................... 6
9.2.1. DC Characteristics ................................................................................................................... 6
9.2.2. AC Characteristics (1): Standard Mode (100 kHz) .................................................................. 7
9.2.3. AC Characteristics (2): Fast Mode (400 kHz).......................................................................... 7
9.2.4. AC Characteristics (3): INTN ................................................................................................... 8
10. Functional Descriptions ........................................................................................................................ 9
10.1. Power Supply States ..................................................................................................................... 9
10.2. Reset functions .............................................................................................................................. 9
10.3. Operation Mode ........................................................................................................................... 10
10.4. Operation Modes ..........................................................................................................................11
10.4.1. Stand-by Mode (MODE = “0”) ...............................................................................................11
10.4.2. Continuous Mode (MODE = “1”) ...........................................................................................11
10.5. Synchronization Function ............................................................................................................ 12
10.6. Sampling Data Storage Function ................................................................................................ 12
10.7. Measurement Data Read ............................................................................................................ 13
10.8. Data Read Sequence Example ................................................................................................... 17
10.9. Internal Algorithm......................................................................................................................... 19
11. Serial Interface.................................................................................................................................... 20
11.1. Data Transfer ............................................................................................................................... 20
11.1.1.Changing state of the SDA line .............................................................................................. 20
11.1.2.Start / Stop Conditions ........................................................................................................... 20
11.1.3.Acknowledge.......................................................................................................................... 21
11.1.4.Slave Address ........................................................................................................................ 22
11.1.5.Write Command ..................................................................................................................... 22
11.1.6.Read Command ..................................................................................................................... 23
12. Memory Map ...................................................................................................................................... 25
13. Register Definitions ............................................................................................................................ 26
14. Spectrum Sensitivity (Reference) ...................................................................................................... 36
15. Field of View (Reference)................................................................................................................... 37
16. IR Sensor Output Characteristics (Reference) .................................................................................. 38
17. Recommended External Circuits ....................................................................................................... 39
18. Package.............................................................................................................................................. 40
18.1. Outline Dimensions ..................................................................................................................... 40
18.2. Pad dimensions ........................................................................................................................... 41
18.3. Marking ........................................................................................................................................ 42
19. Orgering Guide................................................................................................................................... 42
20. Revision History ................................................................................................................................. 42
IMPORTANT NOTICE .......................................................................................................................... 43
018006915-E-00
-2-
2018/06





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