Light-to-frequency converter photo IC
S9705 series
Converts light level to frequency of output pulse
The S9705 and S9705-01DT are photo ICs that combine a photodiode and a current-to-frequency converter on a CMOS chip.
Output is a square wave (50% duty ratio) with frequency directly proportional to light level incident on the photodiode. The
CMOS level digital output allows direct connection to a microcontroller or other logic circuitry. The S9705 series has wide dynamic range and light level can be easily measured when used with a digital counter.
Features
Applications
Converts light level to frequency
Liquid crystal monitor backlight dimmer for mobile devices
Wide dynamic range: 5 orders of magnitude
Brightness adjustment for large-screen liquid crystal TV
Excellent linearity
Lighting dimmer
Output timing reset function
Replacement for CdS photoconductive cells
Digital output for direct interface to microcontroller
4-pin plastic package
Absolute maximum ratings
Parameter
Supply voltage
Load current
Power dissipation
Operating temperature
Storage temperature
Reflow soldering conditions*1
Symbol
Vdd
Io
P
Topr
Tstg
S9705*2
S9705-01DT*3
Tsol
Condition
Ta=25 °C
Ta=25 °C
Ta=25 °C
No dew condensation*1
No dew condensation*1
Value
-0.3 to +6
±2
50
-40 to +85
-40 to +100
Peak temperature 250 °C max, 2times(see page 7)
Peak temperature 240 °C max, 2 times
Unit
V
mA
mW
°C
°C
-
*1: When there is a temperature difference betw een a product and the surrounding area in high humidity environment, dew condensation
may occur on the product surface. Dew condensation on the product may cause deterioration in characteristicsand reliability.
*2: JEDEC level 4
*3: JEDEC level 5a
Note: Exceeding the absolute maximum ratings even momentarily may cause a drop in product quality. Always be sure to use the
product within the absolute maximum ratings.
www.hamamatsu.com
1
Light-to-frequency converter photo IC
S9705 series
Electrical and optical characteristics (RESET=“L”, Vdd=5 V, Ta=25 °C, unless otherwise noted)
Parameter
Symbol
Peak sensitivity wavelength
Supply voltage
Current consumption
Output frequency
Maximum output frequency
Response time
Dark frequency
Linearity
Power supply voltage
dependence of output
frequency
Temperature coefficient of
output frequency
Delay time
High level output voltage
Low level output voltage
Output impedance
High level input voltage
Low level input voltage
Input pull-up resistance
Output pulse duty ratio
λp
Vdd
Idd
fo
fmax
tfl
fd
-
Condition
Dark state, no load
2856 K*4
10 klx, DC light source
5 lx to 5 mlx, 90%
fo=10 kHz*5
Min.
2.7
38
300
0
-3
S9705
Typ.
550
1.5
50
-
Max.
5.5
3.0
62
1000
0.1
2
+3
Min.
2.7
30
300
0
-3
S9705-01DT
Typ.
620
1.5
40
-
Max.
5.5
3.0
50
1200
0.1
2
+3
Unit
nm
V
mA
kHz
kHz
s
Hz
%
-
Vdd=5 V ± 10%
-
±0.5
-
-
±0.5
-
%
-
Ta=25 ± 10 °C, fo=10 kHz
λ=λp
-
±0.02
-
-
±0.02
-
%/°C
4.5
1
4.0
0.1
40
1
50
0.1
0.5
1.0
5
60
4.5
1
4.0
0.1
40
1
50
0.1
0.5
0.1
5
60
μs
V
V
MΩ
V
V
MΩ
%
td
Voh
Vol
Ro
Vih
Vil
Rin
D
Ioh=-0.5 mA
Iol=0.5 mA
RESET=“H”
RESET
RESET
RESET=“L”
fo=10 Hz
*4: S9705=100 lx, S9705-01DT=20 lx
*5: Deviation from the straight line connecting the origin point to the fmax point, normalized by the 10 kHz value.
Spectral response
(Typ. Ta=25 °C)
1.0
S9705
Relative sensitivity
0.8
Human eye sensitivity
S9705-01DT
0.6
0.4
0.2
0
200 300 400 500 600 700 800 900 1000 1100 1200
Wavelength (nm)
KPICB0093EC
2
Light-to-frequency converter photo IC
S9705 series
Output frequency vs. illuminance
(Typ. Ta=25 °C, 2856 K)
107
106
Output frequency (Hz)
5
10
4
10
103
2
10
1
10
0
10
10-1 -3
10
10-2
10-1
100
101
102
103
104
Illuminance (lx)
KPICB0091EC
Timming chart
S9705
tor*1
tres
RESET
td
OUTPUT
td
*2
*1: Output starts with "Low" after releasing RESET. Illuminance can be obtained by measuring the time (tor) required
before the first output transition after releasing RESET. (tres is recommended to be longer than 1 μs.)
*2: OUTPUT terminal is at High impedance during RESET period ("High" state).
KPICC0120EF
3
Light-to-frequency converter photo IC
S9705 series
S9705-01DT
tres
RESET
td
td
OUTPUT
ī
* OUTPUT terminal is at High impedance during RESET period ("High" state).
KPICC0275EA
4.0*
3.9
3.8
4.2 ± 0.2
(Including burr)
4.0*
0.7
0.75
1.0 ± 0.4
3.4
Photosensitive
surface
Photosensitive area
2.54
3.2 ± 0.2
(Including burr)
0.75
(4 ×) 0.35
(4 ×) 0.45
Dimensional outline (unit: mm)
0.05
3.0*
1.0 ± 0.4
0.35
0.75
5.0 ± 0.3
0.45 ± 0.3
3.0*
2.8
RESET
GND
Vdd
OUTPUT
0.1 ± 0.1
0.15
2.4
1.8 depth 0.15 max.
1.3
0.45 ± 0.3
2.9
3.0*
Tolerance unless otherwise
noted: ±0.1, ±2°
Shaded area indicates burr.
Chip position accuracy with
respect to the package
dimensions marked*
X, Y≤±0.2, θ≤±2°
KPICA0063EE
4
Light-to-frequency converter photo IC
S9705 series
Pin connections
Pin no.
Symbol
Function
1
RESET
2
3
GND
Vdd
Ground
Supply terminal
4
OUTPUT
Output terminal
Out disable
Input/Output
Input
(digital)
Output
(digital)
Equivalent input circuit
Vdd
RESET
KPICC0276EA
Recommended land pattern (unit: mm)
2.54
0.7
1.2
4.6
KPICC0191EA
5
Light-to-frequency converter photo IC
S9705 series
Standard packing specifications
Reel (conforms to JEITA ET-7200)
Dimensions
254 mm
Hub diameter
80 mm
Tape width
12 mm
Material
PS
Electrostatic characteristics
Conductive
8.0 ± 0.1
4.0 ± 0.1
1.55 ± 0.1
2.0 ± 0.1
1.75 ± 0.1
Embossed tape (unit: mm, material: PS, conductive)
0.3 ± 0.05
5.5 ± 0.1
4.5 ± 0.2
12.0 ± 0.3
2.3 ± 0.2
5.4 ± 0.2
Reel feed direction
KPINC0195EA
Packing quantity
2000 pes/reel
Packing type
Reel and desiccant in moisture-proof packaging (vacuum-sealed)
6
Light-to-frequency converter photo IC
S9705 series
Measured example of temperature profile with our hot-air reflow oven for product testing (S9705)
300 °C
Temperature
250 °C max.
200 °C
190 °C
170 °C
Preheat
80 to 110 s
Soldering
70 s max.
Time
KPICB0173EA
∙ This product supports lead-free soldering. After unpacking, store it in an environment at a temperature of 30 °C or less and a
humidity of 60% or less, and perform soldering within 72 hours.
∙ The effect that the product receives during reflow soldering varies depending on the circuit board and reflow oven that are used.
Before actual reflow soldering, check for any problems by testing out the reflow soldering methods in advance.
Related information
www.hamamatsu.com/sp/ssd/doc_en.html
Precautions
∙ Disclaimer
∙ Surface mount type products
Information described in this material is current as of April, 2016.
Product specifications are subject to change without prior notice due to improvements or other reasons. This document has been carefully prepared and the
information contained is believed to be accurate. In rare cases, however, there may be inaccuracies such as text errors. Before using these products, always
contact us for the delivery specification sheet to check the latest specifications.
The product warranty is valid for one year after delivery and is limited to product repair or replacement for defects discovered and reported to us within that
one year period. However, even if within the warranty period we accept absolutely no liability for any loss caused by natural disasters or improper product use.
Copying or reprinting the contents described in this material in whole or in part is prohibited without our prior permission.
www.hamamatsu.com
HAMAMATSU PHOTONICS K.K., Solid State Division
1126-1 Ichino-cho, Higashi-ku, Hamamatsu City, 435-8558 Japan, Telephone: (81) 53-434-3311, Fax: (81) 53-434-5184
U.S.A.: Hamamatsu Corporation: 360 Foothill Road, Bridgewater, N.J. 08807, U.S.A., Telephone: (1) 908-231-0960, Fax: (1) 908-231-1218
Germany: Hamamatsu Photonics Deutschland GmbH: Arzbergerstr. 10, D-82211 Herrsching am Ammersee, Germany, Telephone: (49) 8152-375-0, Fax: (49) 8152-265-8
France: Hamamatsu Photonics France S.A.R.L.: 19, Rue du Saule Trapu, Parc du Moulin de Massy, 91882 Massy Cedex, France, Telephone: 33-(1) 69 53 71 00, Fax: 33-(1) 69 53 71 10
United Kingdom: Hamamatsu Photonics UK Limited: 2 Howard Court, 10 Tewin Road, Welwyn Garden City, Hertfordshire AL7 1BW, United Kingdom, Telephone: (44) 1707-294888, Fax: (44) 1707-325777
North Europe: Hamamatsu Photonics Norden AB: Torshamnsgatan 35 16440 Kista, Sweden, Telephone: (46) 8-509-031-00, Fax: (46) 8-509-031-01
Italy: Hamamatsu Photonics Italia S.r.l.: Strada della Moia, 1 int. 6, 20020 Arese (Milano), Italy, Telephone: (39) 02-93581733, Fax: (39) 02-93581741
China: Hamamatsu Photonics (China) Co., Ltd.: B1201, Jiaming Center, No.27 Dongsanhuan Beilu, Chaoyang District, Beijing 100020, China, Telephone: (86) 10-6586-6006, Fax: (86) 10-6586-2866
Cat. No. KPIC1059E09 Apr. 2016 DN
7