第20章 通信-硬件 I2C
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2023-07-05
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AP3426
3-in-1 Digital ALS+PS+IR LED Module
Dyna Image (DI) Confidential 1/54 Rev 3.0
Descriptions
AP3426 is a module integrated with a digital
ambient light sensor [ALS], a proximity sensor [PS],
and an IR LED in a single package.
This device provides a multiple gain ALS
function with linear response over various dynamic
ranges 512 / 2048 / 8192 / 32768 Lux and is well
suited for applications under clear or darkened
glass.
The proximity function is specifically targeted
towards near field application and detects external
object with simple configurable zone, controlled by
registers. With multiple proximity gain control,
multiple IR LED current control and 10-bit ADC
output, this device is designed specially to fix low
reflection objects, such as black hair.
The device supports an interrupt feature to
improve system efficiency and several features that
help to minimize the occurrence of false triggering.
Through internal calibration and CMOS design, the
AP3426 is designed to minimize device-to-device
variations for ease of manufacturability.
Function Block Diagram
Ordering Information
Features
I
2
C interface (Fast Speed mode at 400k Hz)
Mode Select: Ambient Light Sensor (ALS),
Proximity Sensor (PS), Power Down (PD), ALS
once, PS once, SW Reset.
Built-in temperature compensation circuit
Wide operating temperature range (-40°C to
+85°C)
Ambient Light Photo Sensor
16-bit effective linear output (0~65535)
4 user selectable dynamic range
Flicker rejection (reject 50/60Hz)
High sensitivity at darkened glass
Window loss compensation
Proximity Detector
10 bit effective linear output (0~1023)
4 programmable IR LED current output
High ambient light suppression
Crosstalk compensation
Paired with 940nm IR LED to avoid red
light blinding
RoHS compliant
Applications
Smart phone, Tablet PC, Wearable
Personal Navigation Device
Notebook/ Ultrabook
LCD/PDP TV backlight systems
Digital Photo Frame
Applications with Capacitive Touch Panel
Pin Description
Part No.
Packing
Type
Package
Q’ty
Reel
Size
AP3426
Tape and
Reel
(MSL3)
8Ld ODFN
3.94x2.36x1.35mm
3
2500
7”
AP3426M
8Ld ODFN-Interposer
4.35x2.50x2.95mm
3
1500
13”
AP3426H
8Ld ODFN-Interposer
4.35x2.50x3.65mm
3
AP3426-2.7
8Ld ODFN-Interposer
4.94x3.36x2.70mm
3
AP3426-3.5
8Ld ODFN-Interposer
4.94x3.36x3.50mm
3
AP3426-3.9
8Ld ODFN-Interposer
4.94x3.36x3.90mm
3
AP3426-2.8T
8Ld ODFN-Interposer
4.54x2.96x2.80mm
3
AP3426-3.4T
8Ld ODFN-Interposer
4.54x2.96x3.4mm
3
LEDCSDA INT LDR
LEDAVDD SCL GND
ALS/PS
ADC
I2C
Interface
Control logic
Upper / lower
Threshold
Timming_ctl
FOSCIREF
IRDR
ALS
PS
IR_LED
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