LX1977IDU MICROSEMI [Microsemi Corporation], LX1977IDU Datasheet - Page 3

• Manufacturer Part Number: LX1977IDU
• Description: SMBus Ambient Light Sensor
• Manufacturer: MICROSEMI [Microsemi Corporation]

Copyright © 2010
Rev. 1.0, 2010-03-25
Unless otherwise specified, the following specifications apply over the operating ambient temperature 0°C
following test conditions: 3.0V ≤V
P
I
ALS R
RANGE_SEL = 00b (0 ~ 500 lux)
RANGE_SEL = 01b (0 ~ 1000 lux)
RANGE_SEL = 10b (0 ~ 5000 lux)
RANGE_SEL = 11b (0 ~ 2500 lux)
ADC
ALS
@ F
RANGE_SEL = 01b (0 ~ 1000 lux)
@ F
RANGE_SEL = 01b (0 ~ 1000 lux)
RANGE_SEL = 10b (0 ~ 5000 lux)
RANGE_SEL = 11b (0 ~ 2500 lux)
@ F
@ F
@ F
RANGE_SEL = 00b (0 ~ 500 lux)
NTERNAL
OWER
Full Scale ADC Output Value
Internal Oscillator Frequency
Dynamic Response Time
Peak Spectral Response
OSC
OSC
OSC
OSC
OSC
Dark ADC Count Value
Operational Voltage
@ F
ESPONSE
Infrared Response
ADC Output Count
ADC Output Count
ADC Output Count
ADC Output Count
ADC Output Count
S
= 40.96kHz, T
= 40.96kHz, T
= 40.96kHz, T
= 40.96kHz, T
= 40.96kHz, T
Supply Current
Supply Current
UPPLY
Non-Linearity
Disable Time
Enable Time
Parameter
OSC
TM
= 40.96kHz,
INT
INT
INT
INT
INT
= 50ms
= 100ms
= 100ms
= 100ms
= 100ms
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: [phone]
DD
T
T
Symbol
R(10%~90%)
≤ 4.5V
F(90%~10%)
λ
D
D
D
D
D
D
D
D
D
D
PR(ALS)
F
DNL
COUNT
COUNT
COUNT
COUNT
COUNT
COUNT
COUNT
COUNT
COUNT
COUNT
V
t
I
I
Δ
t
OFF
OSC
DD
DD
ON
DD
IR
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
Note 5
Shut Down ALS
3.0V ≤V
3.0V ≤V
E
Note 3
T
T
T
T
Software Enable
Software Disable
Light Input Change From 200 lux to 20 lux
Light Input Change From 20 lux to 200 lux
T
Note 6
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
T
INT
INT
INT
INT
INT
INT
V(white)
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
= 200 lux, Note 1,2
= 500 lux, Note 1,2
= 1000 lux, Note 1,2
= 100 lux, Note 1,2
= 200 lux, Note 1,2
= 500 lux, Note 1,2
= 200 lux
= 500 lux
= 1000 lux
= 500 lux
= 1000 lux
= 2000 lux
= 500 lux
= 1000 lux
= 2000 lux
= 0 lux, T
=100mS
= 100 ms, Note 4
= 50 ms, Note 4
= 25 ms, Note 4
= 6.25 ms, Note 4
= 100ms, RANGE_SEL=00b
Analog Mixed Signal Group
= 100 lux, E
DD
DD
Test Conditions / Comment
.≤ 3.6V
.≤ 4.5V
®
Microsemi
A
= 25°C, RANGE_SEL=00b,
V(810nm)
= 14.6µW/cm
SMBus Ambient Light Sensor
P
RODUCTION
2
,
38.91
36.86
1768
1403
3537
Min
346
880
692
3.0
D
-8
-5
ATASHEET
≤
40.96
40.96
1861
1489
3723
1808
3535
1437
1433
2851
Typ
555
100
100
372
931
745
733
364
713
734
T
1
0
1
A
≤
70°C and the
43.00
45.06
4095
2047
1023
1955
1575
3909
Max
255
398
982
797
4.5
0.2
15
8
5
4
LX1977
Counts
Counts
Counts
Counts
Counts
Counts
Counts
Units
kHz
mA
nm
ms
µA
µs
µs
%
%
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