lx1974 Microsemi Corporation, lx1974 Datasheet - Page 4

• Manufacturer Part Number: lx1974
• Description: Ambient Light Detector
• Manufacturer: Microsemi Corporation

Copyright © 2005
Rev. 1.0, 2006-05-09
Unless otherwise specified, the following specifications apply over the operating ambient temperature -40°C
otherwise noted and the following test conditions: See Note 1, V
White
LED
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.
TM
The input irradiance (E
peak λ = 550nm.
See Figure 1.
See Figure 2.
Parameter
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: [phone]
10kΩ
V
) is supplied from a white light-emitting diode (LED) optical source adjusted to impose the specified E
LX1974
V
Symbol
I
V
I
DD
DD(DARK)
DD
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
PR
)
SS
)
E
change with additional direct light input of
292μW/cm
E
E
E
E
E
E
14.6μW/cm
E
E
V
V(550nm)
V
V
V
V
V
V
V
V
RIPPLE
Integrated Products Division
= 14.6μW/cm
= 146μW/cm
= 292μW/cm
= 14.6μW/cm
= 146μW/cm
= 292μW/cm
= 0μW/cm
= 0μW/cm
T E S T C I R C U I T S
®
Microsemi
= 10mV
= 292μW/cm
V
SS
2
2
at 910nm,
DD
≤ E
2
2
Test Conditions
, T
=5V, R
P-P
2
2
2
2
V
2
2
, I
, I
A
(2K lux), Note 2
, I
(1K lux), Note 2
(100 lux), Note 2
, f = 10kHz
≤ 146μW/cm
White
= 25°C
SS
SS
LED
SS
= 100μA
= 200μA
2
Note 3
= 10μA
SS
,
Current responsivity
= 10K
Figure 2 – IR Sensitivity Measurement Circuit
Ambient Light Detector
2
P
@ 25°C
RODUCTION
910nm
D
10kΩ
Min
150
ATA
7.5
-15
75
-5
LX1974
≤
S
V
LX1974
HEET
T
0.010
DD
0.04
Typ
A
520
100
200
-25
1.2
1.8
2.2
10
1
≤
85°C except where
Max
12.5
125
250
200
1.4
2.1
2.6
15
50
5
LX1974
Units
mm
V
nm
μA
nA
dB
V
%
%
V
at a
SS
2
Page 4