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Rev.2.1_00
BIPOLAR DETECTION TYPE HALL IC WITH
POWER-DOWN FUNCTION
S-5721A/5722A Series
The S-5721A/5722A Series, developed using CMOS technology, is a
bipolar detection type Hall IC with a high-sensitivity that operates on a low
current.
The output voltage changes when the S-5721A/5722A Series detects the
intensity level of flux density and a polarity change. Using the S-
5721A/5722A Series with a magnet makes it possible to detect rotation in
various devices.
High-density mounting is possible by using the super-small SNT-4A
package. Also, the S-5721A/5722A Series is the most suitable for portable
devices due to the included power-down circuit.
„ Features
Built-in chopping stabilized amplifier
Detection of bipolar magnetic fields
Applicable in various devices with wide range of option
Detection logic for magnetism : Level “H” at S pole detection, level “L” at S pole detection
Output types :
CMOS output, Nch open drain output
Wide power supply voltage range : 2.4 V to 5.5 V
Low current consumption :
80 µA typ., 120 µA max. (S-5721A Series)
High speed detection :
Operating cycle 132 µs typ., 240 µs max. (S-5722A Series)
Built-in power-down circuit :
Extends battery life
In the power-down mode 1.0 µA max.
Operating temperature range :
40°C to +85°C
Small dependency magnetic characteristics against temperature
Small package :
SNT-4A
Lead-free product
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Jog dials, wheel keys
Trackballs, mouse devices
Operation keys
Playthings, portable games
Home appliances
„ Package
Package Name
SNT-4A
Package
PF004-A
Drawing Code
Tape
Reel
PF004-A
PF004-A
Land
PF004-A
Seiko Instruments Inc.
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BIPOLAR DETECTION TYPE HALL IC WITH POWER-DOWN FUNCTION
S-5721A/5722A Series
Rev.2.1_00
„ Block Diagrams
1. CMOS output product
VDD
CE
VSS
*1
Power-down circuit
*1 *1
Sleep/Awake logic
Chopping
stabilized amplifier
*1
OUT
*1
*1. Parasitic diode
2. Nch open drain output product
Figure 1
VDD
CE
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VSS
*1
Power-down circuit
*1 *1
Sleep/Awake logic
Chopping
stabilized amplifier
*1. Parasitic diode
Figure 2
OUT
*1
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BIPOLAR DETECTION TYPE HALL IC WITH POWER-DOWN FUNCTION
Rev.2.1_00
S-5721A/5722A Series
„ Product Name Structure
1. Product name
S-572 x A x B x – I4T1 G
Package name (abbreviation) and packing specifications*1
I4T1 : SNT-4A, Tape
Detection logic for magnetism
H : Level “H” at S pole detection
L : Level “L” at S pole detection
Pole detection
B : Bipolar detection
Output form
C : CMOS output
N : Nch open drain output
Product type
1 : Low current consumption
2 : Fast operation
*1. Refer to the tape specifications at the end of this book.
2. Product name list
Table 1
Product Type
Output Form
Pole Detection Detection Logic for Magnetism Product Name
Low current consumption CMOS output
Bipolar detection Level “H” at S pole detection S-5721ACBH-I4T1G
Low current consumption Nch open drain output Bipolar detection Level “H” at S pole detection S-5721ANBH-I4T1G
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CMOS output
Bipolar detection Level “H” at S pole detection S-5722ACBH-I4T1G
Remark Please contact our sales office for products other than the above.
Seiko Instruments Inc.
3