MAX44000 Datasheet, PDF (1/24 Pages) Maxim Integrated Products – Ambient and Infrared Proximity Sensor

19-5859; Rev 0; 10/11
Ambient and Infrared Proximity Sensor
General Description
The MAX44000 combines a wide-dynamic range ambient
light sensor with an integrated infrared proximity sensor. The
IC is a perfect solution for touch-screen portable devices.
The IC can consume as low as 11µA (time averaged) in
ambient light sensing plus proximity sensing, including
external IR LED current.
The on-chip ambient sensor has the ability to make wide
dynamic range 0.03 lux to 65,535 lux measurements. An
on-chip IR proximity detector is matched with an inte-
grated IR LED driver. All readings are available on an
I²C communication bus. A programmable interrupt pin
minimizes the need to poll the device for data, freeing
up microcontroller resources, reducing system software
overhead, and ultimately, reducing power consumption.
The IC is designed to drive an external IR LED and can
operate from a VDD of 1.7V to 3.6V. It consumes just 5µA
operating current when only the ambient light sensor is
enabled and 7µA when the proximity receiver and driver
are enabled.
Applications
Smartphones
Accessories
Industrial Sensors
Presence Detection
VLED
VDD
Features
S Tiny, 2mm x 2mm x 0.6mm UTDFN-Opto Package
S VDD = 1.7V to 3.6V
S Low-Power Operation
5µA in Ambient Mode
7µA in Ambient Plus Proximity Mode
70µA in Ambient Plus Proximity Mode,
Including 100mA LED Current
S Excellent Light Source Matching
Programmable Green and IR Channel Gains
S Integrated Single-Pulse IR LED Driver
10mA to 110mA Programmable Range
Internal Ambient Cancellation
S -40NC to +105NC Temperature Range
Ordering Information
PART
MAX44000GDT+
TEMP RANGE
-40NC to +105NC
PIN-PACKAGE
6 OTDFN-EP*
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
Typical Application Circuit appears at end of data sheet.
Simplified Block Diagram
VDD
IR LED
VIS + IR
(ALS)
IR (ALS)
IR (PRX)
DRV
ALS
PGA
MAX44000
ALS
PGA
AMBIENT
PRX
CANCELLATION
PGA
14-BIT
I²C
14-/8-BIT
MICROCONTROLLER
SDA
SCL
INT
GND
GND
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or visit Maxim’s website at www.maxim-ic.com.