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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.
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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
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ULTRA-LOW CURRENT CONSUMPTION PHOTOCURRENT DETECTION IC
Rev.1.2_00
S-5470 Series
„ Product Name Structure
Users can select the output form and output logic for the S-5470 Series. Refer to "1. Product name" regarding the
contents of the product name, "2. Package" regarding the package drawings, "3. Product name list" regarding
details of the product name.
1. Product name
S-5470 x 21 I - M5T1 U
Environmental code
U: Lead-free (Sn 100%), halogen-free
Package abbreviation and IC packing specifications*1
M5T1: SOT-23-5, Tape
Operation temperature
I: Ta = 40°C to +85°C
Detection mode
21: Current amplifier current amplification ratio × 2
*1. Refer to the tape drawing.
Output form and output logic
A: CMOS output (Active "H")
B: CMOS output (Active "L")
C: Nch open-drain output (Active "H")
D: Nch open-drain output (Active "L")
2. Package
Package Name
SOT-23-5
Table 1 Package Drawing Codes
Dimension
MP005-A-P-SD
Tape
MP005-A-C-SD
Reel
MP005-A-R-SD
3. Product name list
Table 2
Product Name
Output Form
Output Logic
Detection Mode
S-5470A21I-M5T1U
CMOS output
Active "H"
Current amplifier current amplification ratio × 2
S-5470B21I-M5T1U
CMOS output
Active "L"
Current amplifier current amplification ratio × 2
S-5470C21I-M5T1U Nch open-drain output Active "H"
Current amplifier current amplification ratio × 2
S-5470D21I-M5T1U Nch open-drain output Active "L"
Current amplifier current amplification ratio × 2
Remark Please contact our sales office for products other than the above.
Seiko Instruments Inc.
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ULTRA-LOW CURRENT CONSUMPTION PHOTOCURRENT DETECTION IC
S-5470 Series
Rev.1.2_00
„ Pin Configuration
1. SOT-23-5
Top view
54
123
Figure 3
Pin No.
1
2
3
4
5
Table 3
Symbol
VDD
VSS
INM
INP
OUT
Description
Power supply pin
GND pin
Reference current input pin
Detection current input pin
Output pin
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ULTRA-LOW CURRENT CONSUMPTION PHOTOCURRENT DETECTION IC
Rev.1.2_00
S-5470 Series
„ Absolute Maximum Ratings
Table 4
Item Symbol
Power supply voltage
Input voltage
Output voltage
CMOS output product
Nch open-drain output product
VDD
VINP, VINM
VOUT
Output pin current
Power dissipation
Operation ambient temperature
Storage temperature
ISOURCE
ISINK
PD
Topr
Tstg
*1. When mounted on board
[Mounted board]
(1) Board size: 114.3 mm × 76.2 mm × t1.6 mm
(2) Name: JEDEC STANDARD51-7
(Ta = +25°C unless otherwise specified)
Absolute Maximum Rating
Unit
VSS 0.3 to VSS + 7.0
VSS 0.3 to VSS + 7.0
VSS 0.3 to VDD + 0.3
VSS 0.3 to VSS + 7.0
20
V
V
V
V
mA
20
600*1
mA
mW
40 to +85
°C
55 to +125
°C
Caution The absolute maximum ratings are rated values exceeding which the product could suffer
physical damage. These values must therefore not be exceeded under any conditions.
700
600
500
400
300
200
100
0
0
50 100 150
Ambient Temperature (Ta) [°C]
Figure 4 Power Dissipation of Package (When Mounted on Board)
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