AS7264N
XYZ Chromatic Color and 440/490nm
Blue Sensor with Electronic Shutter
General Description
The AS7264N provides direct XYZ sensor data which conforms
to the tri-stimulus standard observer color response of the
human eye. In addition, two channels added for measurement
of blue spectrum light, plus a near-IR channel enables
additional application flexibility. LED drivers with
programmable currents are provided for electronic shutter
applications.
The AS7264N integrates Gaussian filters into standard CMOS
silicon via nano-optic deposited interference filter technology
and is packaged in an LGA package that provides a built in
aperture to control the light entering the sensor array.
Control and spectral data access is implemented through an I²C
register set.
Ordering Information
and
Content Guide
appear at end of
datasheet.
Key Benefits & Features
The benefits and features of AS7264N, XYZ Chromatic Color and
440/490nm Blue Sensor with Electronic Shutter are listed
below:
Figure 1:
AS7264N Benefits and Features
Benefits
•
XYZ channel data conforming to human eye
response to color information
•
Additional specific blue light sensing in ranges
associated with eye health and other biological
light effects
•
High accuracy ambient light measurements
•
Direct register read and write with interrupt on
sensor ready
•
High stability over lifetime with minimal drift over
temperature
•
No additional signal conditioning required
•
Direct register read and write with interrupt on
sensor ready
Features
•
XYZ tri-stimulus standard observer filter set
•
Two added blue channels at 440nm and 490nm
•
Ambient light sensing (photopic response)
•
I²C slave digital Interface with optional interrupt
operation
•
Filter set realized by silicon interference filters
•
16-bit ADC with digital access
•
I²C slave digital Interface with optional interrupt
operation
ams Datasheet
[v1-00] 2017-Oct-05
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AS7264N −
General Description
Benefits
•
Electronic shutter control/synchronization
•
Low voltage operation
•
Small, robust package, with built-in aperture
Features
•
Programmable LED drivers
•
2.7V to 3.6V with I²C interface
•
20-pin LGA package 4.5mm x 4.7mm x 2.5mm
-40°C to 85°C temperature range
Application
The AS7264N applications include:
•
Ambient light spectral exposure
•
Biological lighting measurements
•
Color measurement and absorbance
•
Color matching and identification
•
Precision color tuning/calibration
System Block Diagram
Figure 2:
AS7264N Sensor System
3.3V
100nF
10uF
VDD1
VDD2
3.3V
3.3V
AS7264N
MCU
SCL_S
SDA_S
INT
LED_IND
LED_DRV
Light
Source
Light in
Reflective
Surface
X, Y, Z,
NIR, B440
& B490
Sensors
GND
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AS7264N −
Pin Assignments
Pin Assignments
Figure 3:
Pin Diagram of AS7264N (Top View)
The device pin assignments are described below.
20
16
1
15
5
11
6
10
Pin Description
Figure 4:
Pin Description of AS7264N
Pin Number
1
2
3
4
5
6
7
8
9
10
11
Pin Name
NF
RESN
NF
NF
NF
NF
NF
NF
SCL_S
SDA_S
NF
Description
Not functional. Do not connect.
Reset, active LOW
Not functional. Do not connect.
Not functional. Do not connect.
Not functional. Do not connect.
Not functional. Do not connect.
Not functional. Do not connect.
Not functional. Do not connect.
I²C slave clock pin
I²C slave data pin
Not functional. Do not connect.
ams Datasheet
[v1-00] 2017-Oct-05
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AS7264N −
Pin Assignments
Pin Number
12
13
14
15
16
17
18
19
20
Pin Name
NF
INT
VDD2
LED_DRV
GND
VDD1
LED_IND
NF
NF
Description
Not functional. Do not connect.
Interrupt, active HIGH
Voltage supply
LED driver output for driving LED current sink
Ground
Voltage supply
LED driver output for indicator LED current sink
Not functional. Do not connect.
Not functional. Do not connect.
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[v1-00] 2017-Oct-05
AS7264N −
Absolute Maximum Ratings
Absolute Maximum Ratings
Stresses beyond those listed under
Absolute Maximum Ratings
may cause permanent damage to the device. These are stress
ratings only. Functional operation of the device at these or any
other conditions beyond those indicated under
Electrical
Characteristics
is not implied. Exposure to absolute maximum
rating conditions for extended periods may affect device
reliability. The device is not designed for high energy UV
(ultraviolet) environments, including upward looking outdoor
applications, which could affect long term optical performance.
Figure 5:
Absolute Maximum Ratings
Symbol
Parameter
Min
Max
Units
Comments
Electrical Parameters
V
DD_MAX
Supply Voltages VDD1,
VDD2
Input/Output Pin
Voltage
Input Current
(latch-up immunity)
-0.3
5
V
Pins VDD1 & VDD2 must be
sourced from the same supply
voltage
Input/Output pin to GND
JESD78D
V
DD_IO
I
SCR
-0.3
VDD+0.3
±100
V
mA
Electrostatic Discharge
ESD
HBM
ESD
CDM
Electrostatic Discharge
HBM
Electrostatic Discharge
CDM
±1000
±500
V
V
JS-001-2014
JSD22-C101F
Temperature Ranges and Storage Conditions
T
STRG
Storage Temperature
-40
85
°C
IPC/JEDEC J-STD-020. The
reflow peak soldering
temperature (body
temperature) is specified
according IPC/JEDEC
J-STD-020 “Moisture/Reflow
Sensitivity Classification for
Non-hermetic Solid State
Surface Mount Devices”
T
BODY
Package Body
Temperature
260
°C
RH
NC
MSL
Relative Humidity
(non-condensing)
Moisture Sensitivity
Level
5
3
85
%
Maximum floor life time of
168 hours
ams Datasheet
[v1-00] 2017-Oct-05
Page 5
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