Document
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
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.
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.
3
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
4 Seiko Instruments Inc.
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.
Power Dissipation (PD) [mW]
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)
Seiko Instruments Inc.
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