lx1972a Microsemi Corporation, lx1972a Datasheet - Page 4

• Manufacturer Part Number: lx1972a
• Description: Ambient Light Detector
• Manufacturer: Microsemi Corporation

Copyright © 2005
Rev. 1.0, 2006-09-18
The following specifications apply over the operating ambient temperature -40°C
the following test conditions: See Note 1, V
Notes:
RESPONSE
Peak Spectral Response
Infrared Response
Minimum Operational Voltage
Light Current
Gain Linearity
Dark Current
Power Supply Rejection Ratio
Radiant Sensitive Area
Figure 1 – Operational Voltage Measurement Circuit
1.
2.
3.
White
LED
TM
The input irradiance (E
See Figure 1.
See Figure 2.
Parameter
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: [phone]
V
LX1972A
) is supplied from a white light-emitting diode (LED) optical source.
5K
Part
V
DD
Symbol
I
V
I
DD
DD(DARK)
PSRR
I
DD
DD
E L E C T R I C A L C H A R A C T E R I S T I C S
λ
(
I
SS
λ
PR
(
-V
λ
DD
PR
)
SS
)
=5V, R
E
Note 3
E
E
E
E
E
E
E
10 Lux ≤ E
E
E
V
V(white)
V
V
V
V
V
V
V
V
V
RIPPLE
Integrated Products Group
= 100 Lux
= 1000 Lux
= 2000 Lux
= 10 Lux, Note 2
= 100 Lux, Note 2
= 1000 Lux, Note 2
= 2000 Lux, Note 2;
= 0 Lux, T
= 0 Lux
load
T E S T C I R C U I T S
V
®
= 5K
Microsemi
SS
= 10mV
= 1000 Lux, E
V
≤ 1000 Lux
A
Test Conditions
= 25°C
P-P
White
, f = 10kHz
LED
V(810nm)
Figure 2 – IR Sensitivity Measurement Circuit
≤
= 146µW/cm²
Ambient Light Detector
P
T
A
RODUCTION
≤
85°C except where otherwise noted and with
810nm
,
D
Min
176
353
ATA
1.8
-15
18
-5
5K
LX1972A
Part
S
LX1972A
V
HEET
DD
0.04
Typ
580
235
470
-25
1.4
2.2
2.8
2.4
24
1
2
Max
294
587
200
2.7
30
15
50
LX1972A
5
2
3
3
Units
mm
V
nm
μA
nA
dB
%
%
V
SS
2
Page 4