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Seiko Instruments Electronic Components Datasheet


S-5470

ULTRA-LOW CURRENT CONSUMPTION PHOTOCURRENT DETECTION IC


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S-5470 pdf
S-5470 Series
www.sii-ic.com
© Seiko Instruments Inc., 2012
ULTRA-LOW CURRENT CONSUMPTION
PHOTOCURRENT DETECTION IC
Rev.1.2_00
The S-5470 Series, developed by CMOS technology, is a photocurrent detection IC with an ultra-low current consumption.
It detects 0.7 nA typ. photocurrent generated by an external photodiode (PD) or LED. It also has a function to detect the
difference of photocurrent level between two external photodiodes (PDs) or LEDs.
Due to its ultra-low current consumption and low-voltage operation, the S-5470 Series is suitable for battery-operated
small mobile device applications.
„ Features
Ultra-low current consumption:
Micro-photocurrent detection:
Wide operation voltage range:
Detection of certain photocurrent level:
IDD 0.1 nA typ.
IDET = 0.7 nA typ.
VDD = 0.9 V to 5.5 V
Detects certain level of photocurrent generated by external photodiode
(PD) or LED
Detection of photocurrent level difference: Detects the difference of photocurrent level between external
External parts:
Lead-free (Sn 100%), halogen-free*2
photodiodes (PDs) or LEDs
One or two external photodiodes (PDs) or LEDs*1
*1. The required number of PDs or LEDs changes with operation.
Regarding selection of PD and LED, refer to "3. Selection of PD or LED" in "„ Application Circuits".
*2. Refer to "„ Product Name Structure" for details.
„ Applications
Shading detection
Light and darkness detection
Non-contact switch for portable and wireless device
„ Package
SOT-23-5
Seiko Instruments Inc.
1



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S-5470 pdf
ULTRA-LOW CURRENT CONSUMPTION PHOTOCURRENT DETECTION IC
S-5470 Series
Rev.1.2_00
„ Block Diagrams
1. CMOS output product
VDD
INP
INM
*1
*1
*1
+ Current
adder
Current
amplifier
IDET
+
Current
comparator
Logic
selection
*1
OUT
*1
VSS
*1. Parasitic diode
2. Nch open-drain output product
VDD
Figure 1
INP
INM
*1
*1
*1
+ Current
adder
Current
amplifier
IDET
+
Current
comparator
Logic
selection
OUT
*1
VSS
*1. Parasitic diode
Figure 2
2 Seiko Instruments Inc.



Part Number S-5470
Description ULTRA-LOW CURRENT CONSUMPTION PHOTOCURRENT DETECTION IC
Maker Seiko Instruments - Seiko Instruments
Total Page 24 Pages
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