iC-LQ
PULSE AND AC LIGHT SENSOR
Rev B1, Page 1/7
chip size 1.2mm 1.88mm
FEATURES
APPLICATIONS
Fast response amplifier with on-chip photodiode
High interference immunity due to monolithic design
Active photodiode area of 1mm
Suitable for visible and near infrared light
Integrated band-pass filter with 150kHz center frequency
Maximum gain obtained for pulse light of 1.2s and upwards
Excellent low frequency and ambient light suppression
Transfer characteristics irrespective of ambient light level
Soft signal and noise limiter on excessive light conditions
Fast recovery on flash light
Analog current source output; transimpedance can be set by
external resistor
Low power consumption from single 5 to 12V supply also at
high ambient light levels
Options: TO metal can packages, optoBGA packages,
customized COB versions
Amplification of pulse and AC
light signals
Receiver for through beam,
reflex and proximity sensors
CHIP
BLOCK DIAGRAM
2002
iC-Haus GmbH
Tel +49-6135-9292-0
Integrated Circuits
Fax +49-6135-9292-192
Am Kuemmerling 18, D-55294 Bodenheim
http://www.ichaus.com
+4.5..13.2V
Vout
AC-AMP
A
f
iph
iC-LQ
R1
1..30k
VCC
OUT
GND
iC-LQ
PULSE AND AC LIGHT SENSOR
Rev B1, Page 2/7
DESCRIPTION
iC-LQ is a sensor for pulse and alternating light with a monolithically integrated photodiode. The device
supersedes conventional photoreceivers, such as those in light barriers, for example.
At the first stage
sensitive changes in the photocurrent are amplified whereas the photocurrents caused by
background light are electronically suppressed with over 60dB (at 100Hz). The integrated amplifier forms a
band-pass characteristic without using any external components. The high pass suppresses ambient light and
low frequency alternating light and the low pass reduces high frequency noise.
For visible light or near infrared the highest sensitivity for alternating light signals is reached at approximately
150 kHz; for pulse light this is reached at 1.2s and upwards. The transimpedance amplification can be
selected within a range of approximately 1M
S
to 10M
S
via the external operating load.
iC-LQ is available as a 4-pole TO18 metal can package with a glass lens or flat window and as an optoBGA
TM
package for surface mounting. Customized COB versions are also possible.
CHIP LAYOUT
PAD DESCRIPTION
Name
Function
VCC
+4.5..13.2V Supply Voltage
OUT
Current Output
GND
Ground
iC-LQ
PULSE AND AC LIGHT SENSOR
Rev B1, Page 3/7
All voltages are referenced to ground unless otherwise noted.
All currents into the device pins are positive; all currents out of the device pins are negative.
ABSOLUTE MAXIMUM RATINGS
Values beyond which damage may occur; device operation is not guaranteed.
Item
Symbol
Parameter
Conditions
Fig.
Unit
Min.
Max.
G001 VCC
Supply Voltage
0
15
V
G002 I(OUT)
Output Current
-4
4
mA
TG1 Tj
Junction Temperature
-40
150
C
TG2 Ts
Storage Temperature
see package specifications
C
THERMAL DATA
Operating Conditions: VCC= 4.5..13.2V
Item
Symbol
Parameter
Conditions
Fig.
Unit
Min.
Typ.
Max.
T1
Ta
Operating Ambient Temperature
Range
see package specifications
C
iC-LQ
PULSE AND AC LIGHT SENSOR
Rev B1, Page 4/7
ELECTRICAL and OPTICAL CHARACTERISTICS
Operating Conditions: VCC= 4.5..13.2V, R1= 10k
S
, CL= 20pF,
8
= 875nm, Tj= -25..125C, unless otherwise noted
Item
Symbol
Parameter
Conditions
Tj
Fig.
Unit
C
Min.
Typ.
Max.
Total Device
001
VCC
Permissible Supply Voltage
4.5
13.2
V
002
I(VCC)
Supply Current
E(PD)= 0
E(PD)ac= 0, E(PD)pk= 0,
E(PD)dc= 30mW/cm
0.4
0.8
1.4
2
mA
mA
003
Vs(OUT) Output Saturation Voltage
Vs(OUT)= VCC -V(OUT);
I()= -1mA
0.5
V
004
I(OUT)
Permissible Output Current
-2
0
mA
005
I0(OUT)
Output Bias Current
E(PD)= 0
E(PD)= 0, VCC= 5V
27
-235
-145
-105
A
A
006
Vc()hi
Output Clamp Voltage hi
Vc()hi= V(OUT) -VCC;
VCC= 0V, I()= 4mA
0.25
0.5
1.4
V
007
Vc()lo
Output Clamp Voltage lo
I()= -4mA
-1.4
-0.5
-0.25
V
Photodiode
008
Aph()
Radiant Sensitive Area
1
mm
009
S(
8
)max
Spectral Sensitivity
0.5
A/W
010
8
ar
Spectral Application Range
Se(
8
ar)= 0.1S(
8
)max
500
1050
nm
Photocurrent Amplifier
011
E()dc
Permissible DC Irradiance
8
LED
for S(
8
)max, iC-LQ chip
30
mW/
cm
012
Ev()dc
Ambient Light Susceptibility
standard illuminant A, T= 2856K
TO18-4F
TO18-4L
TO18-4F
TO18-4L
50
7
70
10
mW/
cm
2
klx
klx
013
E()pk
Permissible Peak Irradiance
I(OUT) increases or remains
constant as E()pk increases;
chip, TO18-4F
TO18-4L
100
15
mW/
cm
014
0
pk
Pulse Light Amplification 875nm
VCC= 5V, E(PD)pk= 35W/cm
tr= tf= 0.1s, twpk= 1.2s;
chip, TO18-4F
TO18-4L
100
700
220
1540
350
2500
A/W
A/W
015
0
pk
Pulse Light Amplification 850nm
see 014; chip, TO18-4F
TO18-4L
250
1800
A/W
A/W
016
)
t()
Output Current Delay
see 014,
I(OUT): 0
50% peak value
1.5
s
017
trec
Recovery Time
see 014, settled better 10% to
initial quiescent point
15
s
018
trec
Power Flash Recovery Time
E(PD)pk= 35mW/cm,
twpk= 100s
60
s
019
0
ac
AC Light Amplification
f= fc, E(PD)ac= 35Wp/cm;
chip, TO18-4F
TO18-4L
400
2800
A/W
A/W
021
fc
Bandpass Center Frequency
R1= 1k
S
, CL= 20pF
R1= 10k
S
, CL= 20pF
130
125
kHz
kHz
022
fhc
Upper Cut-off Frequency (-3db)
R1= 1k
S
, CL= 20pF
R1= 10k
S
, CL= 20pF
390
350
kHz
kHz
iC-LQ
PULSE AND AC LIGHT SENSOR
Rev B1, Page 5/7
ELECTRICAL and OPTICAL CHARACTERISTICS
Operating Conditions: VCC= 4.5..13.2V, R1= 10k
S
, CL= 20pF,
8
= 875nm, Tj= -25..125C, unless otherwise noted
Item
Symbol
Parameter
Conditions
Tj
Fig.
Unit
C
Min.
Typ.
Max.
Fig. 1: typical relative spectral sensitivity
RES BW 1 0/ kHz
VBW 1 0/ kHz
#SWP 1 0/ .1 sec
AT 1 0/ dB
REF 5.
0/ 0/ 6 mV
START 15 kHz
STOP 1.5
0/ 0/ MHz
LIN
PEAK
WA SB
SC FS
CORR
Fig. 3: output voltage noise [mV/
o
10kHz] to
10k
S
/20pF load when Ev()dc< 500lx
Fig. 2: typical directional characteristics for
TO18 and optoBGA packages
RES BW 1 0/ kHz
VBW 1 0/ kHz
#SWP 1 0/ .1 sec
AT 1 0/ dB
REF 5.
0/ 0/ 6 mV
START 15 kHz
STOP 1.5
0/ 0/ MHz
LIN
PEAK
WA SB
SC FS
CORR
Fig. 4: output voltage noise [mV/
o
10kHz] to
10k
S
/20pF load with Ev()dc of approx. 15000lx
(standard illuminant A, T= 2856K)
023
flc
Lower Cut-off Frequency (-3db)
R1= 1k
S
, CL= 20pF
R1= 10k
S
, CL= 20pF
45
45
kHz
kHz
024
Q
Filter Q-Factor
Q= fc / (fhc-flc);
R1= 1k
S
, CL= 20pF
R1= 10k
S
, CL= 20pF
0.38
0.41
025
G100
LF Suppression
f= 100Hz
60
dB
026
Vn(OUT) Output Noise Voltage (RMS)
VCC= 5V, E(PD)= 0
VCC= 5V, Ev(PD)dc ca. 15000lx,
standard illuminant A, T= 2856K,
chip
7
20
mV
mV
027
ton(VCC) Power-On Setup Time
Tj= -25..70C
450
s
ELECTRICAL and OPTICAL CHARACTERISTICS: Diagrams
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