AH3781

AH3781
HIGH-VOLTAGE HIGH-SENSITIVITY HALL EFFECT LATCH
WITH INTERNAL PULL-UP RESISTOR
PRELIMINARY - CONFIDENTIAL
Description
Pin Assignments
The AH3781 is a high-voltage, high-sensitivity Hall Effect latch IC
with internal pull-up resistor designed for commutation of brushless
DC motors, flow meters, linear encoders and position sensors in
industrial, consumer home appliance and personal care applications.
To support a wide range of demanding applications, the design is
optimized to operate over the supply range of 3.0V to 28V. With
chopper stabilized architecture and an internal bandgap regulator to
provide temperature compensated supply for internal circuits, the
AH3781 provides a reliable solution over the whole operating range.
For robustness and protection, the device has a Zener clamp on the
supply. The output has an overcurrent limit and a Zener clamp.
(Top View)
3 OUTPUT
GND 2
1 VDD
SOT23
(Top View)
The internally pulled-up output can be switched on with South pole of
sufficient strength and switched off with North pole of sufficient
strength. When the magnetic flux density (B) perpendicular to the part
marking surface is larger than the operate point (BOP) the output is
3. OUTPUT
2. GND
1. VDD
switched on (pulled low). The output is held latched until magnetic flux
density reverses and becomes lower than the release point (BRP).
SIP-3
Features
Applications
•
•
•
Bipolar Latch Operation (South Pole: On, North Pole: off)
3.0V to 28V Operating Voltage Range
High Sensitivity: BOP and BRP of +25G and -25G Typical
•
•
•
Internally Pull-up Resistor on the Output Pin
Output Overcurrent Limit
Chopper Stabilized Design Provides
Superior Temperature Stability
Minimal Switch Point Drift
Enhanced Immunity to Stress
Good RF Noise Immunity
Zener Clamp on Supply and Output Pins
-40°C to +125°C Operating Temperature
ESD (HBM): 6kV
Industry Standard SOT23 and SIP-3 Packages
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
•
•
•
•
•
•
•
•
•
•
•
•
Notes:
Brushless DC Motor Commutation
Revolution Per Minute (RPM) Measurement
Flow Meters
Angular and Linear Encoder and Position Sensors
Contactless Commutation, Speed Measurement and Angular
Position Sensing/Indexing in Consumer Home Appliances, Office
Equipments and Industrial Applications
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
AH3781
Document number: DS37903 Rev. 1 - 2
1 of 13
www.diodes.com
September 2015
© Diodes Incorporated
AH3781
PRELIMINARY - CONFIDENTIAL
Typical Applications Circuit
3.0V to 28V
VDD
OUTPUT
AH3781
CIN
GND
Note:
4. CIN is for power stabilization and to strengthen the noise immunity, the recommended capacitance is 10nF ~ 100nF. RL is the pull-up resistor.
Pin Descriptions
Package: SOT23
Pin Number
Pin Name
1
VDD
2
3
GND
OUTPUT
Function
Power Supply Input
Ground
Output Pin
Functional Block Diagram
VDD
Power
switch
To All Subcircuits
Amp
Low-Pass Filter
Sample and
Hold
Dynamic Offset
Cancellation
Amp
OUTPUT
Control
Current
Limit
GND
AH3781
Document number: DS37903 Rev. 1 - 2
2 of 13
www.diodes.com
September 2015
© Diodes Incorporated
AH3781
Absolute Maximum Ratings (Notes 5 & 6) (@TA = +25°C, unless otherwise specified.)
PRELIMINARY - CONFIDENTIAL
Symbol
Value
Unit
VDD
Supply Voltage (Note 6)
32
V
VDDR
Reverse Supply Voltage
-0.3
V
VOUT_MAX
Output Off Voltage (Note 6)
32V
V
IOUT
Continuous Output Current
60
mA
B
Characteristic
Magnetic Flux Density
PD
Package Power Dissipation
Ts
Storage Temperature Range
TJ
Maximum Junction Temperature
ESD
Notes:
Unlimited
550
230
-65 to +165
SIP-3
SOT23
Electrostatic Discharge Withstand Capability - Human Body Model
mW
mW
°C
+150
°C
6
kV
5. Stresses greater than the 'Absolute Maximum Ratings' specified above may cause permanent damage to the device. These are stress ratings only;
functional operation of the device at these or any other conditions exceeding those indicated in this specification is not implied. Device reliability may be
affected by exposure to absolute maximum rating conditions for extended periods of time.
6. The absolute maximum VDD of 32V is a transient stress rating and is not meant as a functional operating condition. It is not recommended to
operate the device at the absolute maximum rated conditions for any period of time.
Recommended Operating Conditions (@TA = -40°C to +125°C, unless otherwise specified.)
Symbol
VDD
TA
Rating
Unit
Supply Voltage
Parameter
Operating
3.0 to 28
V
Operating Temperature Range
Operating
-40 to +125
°C
Electrical Characteristics
Symbol
VOUT_ON
IOUT_OFF
Parameter
Output On Voltage
Output Leakage Current
Supply Current
RPU
tST
fc
Internal Pull-Up Resistance
Device Start-Up Time
Chopping Frequency
The time delay from magnetic
threshold reached to the start of the
output rise or fall
Output Rising Time
(external pull-up resistor RL and load
capacitance dependent)
Output Falling Time
(Internal switch resistance and load
capacitance dependent)
Output Current Limit
Zener Clamp Voltage
tr
tf
IOCL
VZ
Notes:
(Note 7 & 8) (@TA = -40°C to +125°C, VDD = 3V to 28V, unless otherwise specified.)
IDD
td
Conditions
Conditions
Min
-
Typ
0.2
-
<0.1
15
µA
10
-
3.8
3.8
14
10
800
4.9
5.8
18
-
mA
mA
kΩ
µs
kHz
(Note 9)
-
3.75
-
µs
RL =1kΩ, CL = 20pF
-
0.2
1
µs
RL =1kΩ, CL = 20pF
-
0.1
1
µs
B > BOP, (Note 10 )
IDD = 5mA
30
28
-
55
-
mA
V
IOUT = 20mA, B > BOP
VOUT = 28V, B < BRP, Output off
Output open, VDD = 12V , TA = +25°C
Output open, TA = -40°C to +125°C
TA = -40°C to +125°C
VDD >= 3V, B > BOP (Note 7)
VDD = 3V to 28V
Max
0.4
Unit
V
7. When power is initially turned on, VDD must be within its correct operating range (3.0V to 28V) to guarantee the output sampling. The output state is valid
after the start-up time of 10µs typical from the operating voltage reaching 3V.
8. Typical values are defined at TA = +25°C, VDD = 12V. Maximum and minimum values over the operating temperature range is not tested in production
but guaranteed by design, process control and characterization
9. Guaranteed by design, process control and characterization. Not tested in production.
10. The device will limit the output current IOUT to current limit of IOCL.
AH3781
Document number: DS37903 Rev. 1 - 2
3 of 13
www.diodes.com
September 2015
© Diodes Incorporated
AH3781
Magnetic Characteristics (Notes 11 &12) (TA = -40°C to +125°C, VDD = 3.0V to 28V, unless otherwise specified)
Parameter
Conditions
BOP (South pole to part marking side)
Operation Point
BRP (North pole to part marking side)
Release Point
BHY (|BOPX|-|BRPX|)
Notes:
VDD = 12V, TA = +25°C
TA = -40°C to +125°C
VDD = 12V, TA = +25°C
TA = -40°C to +125°C
VDD = 12V, TA = +25°C
TA = -40°C to +125°C
Hysteresis (Note 13)
Min
10
-40
-20
Typ
25
25
-25
-25
50
50
(1mT=10 Gauss)
Max
Unit
40
Gauss
-10
80
11. When power is initially turned on, VDD must be within its correct operating range (3.0V to 28V) to guarantee the output sampling. The output state is
valid after the start-up time of 10µs typical from the operating voltage reaching 3V.
12. Typical values are defined at TA = +25°C, VDD = 12V. Maximum and minimum values over the operating temperature range is not tested in production
but guaranteed by design, process control and characterization
13. Maximum and minimum hysteresis is guaranteed by design, process control and characterization.
Output
VDD
(off-state)
( Output Voltage )
PRELIMINARY - CONFIDENTIAL
Symbol
Bhy
Turn off
Turn on
(on-state)
VOUT_ON = VSAT
Brp
0
Bop
( Magnetic Flux Density B )
S
S
Part mark
Part mark
AH3781
Document number: DS37903 Rev. 1 - 2
N
N
(SOT23)
(SIP-3)
4 of 13
www.diodes.com
September 2015
© Diodes Incorporated
AH3781
TA = +25oC
Bop
Brp
2
Gauss (G)
Hyst
Gauss (G)
70
60
50
40
30
20
10
0
-10
-20
-30
-40
-50
-60
-70
4
70
60
50
40
30
20
10
0
-10
-20
-30
-40
-50
-60
-70
6
8
10
12
14
16
18
20
22
24
26
28
VDD = 3V
Hyst
Bop
Brp
-50
-25
0
25
50
75
100
125
Supply Voltage (V)
Temperature (oC)
Switch Points Bop and Brp vs Supply Voltage
Switch Points Bop and Brp vs Temperature
VDD = 12V
Hyst
Bop
Brp
-50
70
60
50
40
30
20
10
0
-10
-20
-30
-40
-50
-60
-70
-80
30
Gauss (G)
Gauss (G)
Magnetic Operating Switch Points – BOP and BRP
-25
0
25
50
75
100
125
70
60
50
40
30
20
10
0
-10
-20
-30
-40
-50
-60
-70
150
VDD = 28V
150
Hyst
Bop
Brp
-50
-25
0
25
o
50
75
100
125
150
o
Temperature ( C)
Temperature ( C)
Switch Points Bop and Brp vs Temperature
Switch Points Bop and Brp vs Temperature
Supply Current
7.0
7.0
TA = +25 C
Supply Current IDD (mA)
Supply Current IDD (mA)
PRELIMINARY - CONFIDENTIAL
Typical Operating Characteristics
6.0
5.0
4.0
3.0
2.0
1.0
28V
6.0
5.0
4.0
3.0
12V
2.0
3V
1.0
0.0
0.0
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
-50 -40 -30 -20 -10
0
10 20 30 40 50 60 70 80 90 100 110 120 130
Supply Voltage (V)
Temperature (oC)
Supply Current vs Supply Voltage
Supply Current vs Temperature
AH3781
Document number: DS37903 Rev. 1 - 2
5 of 13
www.diodes.com
September 2015
© Diodes Incorporated
AH3781
Typical Operating Characteristics
TA = +25 C
Output On Voltage VOUT_ON (V)
Output On Voltage VOUT_ON (V)
0.4
0.3
0.2
0.1
0.0
2
4
6
8
10
12
14
16
18
20
22
24
26
28
0.4
28V
0.3
0.2
3V
12V
0.1
0.0
-50 -40 -30 -20 -10
30
0
10 20 30 40 50 60 70 80 90 100 110 120 130
Temperature (oC)
Supply Voltage (V)
Output On Voltage vs Temperature
Output On Voltage vs Supply Voltage
20.0
TA = +25 C
16.0
12.0
8.0
4.0
0.0
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
Internal Pull-up Resistor RPU (kW )
Internal Pull-up Resistor RPU (kW )
Output Pull-Up Resistor (Internal)
20.0
28V
16.0
12.0
3V
12V
8.0
4.0
0.0
-50 -40 -30 -20 -10
0
10 20 30 40 50 60 70 80 90 100 110 120 130
Temperature (oC)
Supply Voltage (V)
Internal Output Pull-up Resistor vs Temperature
Internal Output Pull-up Resistor vs Supply Voltage
70
Output Current Limit IOCL (mA)
Output Current Limit
Output Current Limit IOCL (mA)
PRELIMINARY - CONFIDENTIAL
Output Switch On Voltage
TA = +25 C
60
50
40
30
20
10
0
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
60
28V
50
40
3V
30
20
10
0
-50 -40 -30 -20 -10
10 20 30 40 50 60 70 80 90 100 110 120 130
Output Current Limit vs Temperature
Output Current Limit vs Supply Voltage
Document number: DS37903 Rev. 1 - 2
0
Temperature (oC)
Supply Voltage (V)
AH3781
12V
6 of 13
www.diodes.com
September 2015
© Diodes Incorporated
AH3781
Thermal Performance Characteristics
Package Type: SOT23
TA (°C)
25
50
60
70
80
85
90
100
105
110
120
125
130
140
150
PD (mW)
230
184
166
147
129
120
110
92
83
74
55
46
37
18
0
Power Dissipation Curve
300
Power Dissipation PD (mW)
PRELIMINARY - CONFIDENTIAL
(1)
200
100
0
-40
0
25
50
75
100
Ambient Temperature TA
(2)
125
150
(oC)
Package type: SIP-3
TA (°C)
25
50
60
70
80
85
90
100
105
110
120
125
130
140
150
PD (mW)
550
440
396
362
308
286
264
220
198
176
132
110
88
44
0
PD (mW)
Power Dissipation Curve
600
500
400
300
200
100
0
-40
0
25
50
75
100
125
150
TA (°C)
AH3781
Document number: DS37903 Rev. 1 - 2
7 of 13
www.diodes.com
September 2015
© Diodes Incorporated
AH3781
PRELIMINARY - CONFIDENTIAL
Ordering Information
AH3781 - XXX - X
Packing
Package
7 : Tape & Reel
A: Ammo Box (Note 14)
B: Bulk (Note 15)
P : SIP-3
SA : SOT23
Part Number
Package
Code
Packaging
AH3781-P-A
P
SIP-3
Quantity
7” Tape and Reel
Part Number
Quantity
Suffix
Bulk
Part Number
Suffix
NA
NA
NA
Ammo Box
Quantity Part Number
Suffix
NA
4,000/Box
-A
NA
NA
AH3781-P-B
P
SIP-3
1,000
-B
NA
NA
NA
AH3781-SA-7
SA
SOT23
NA
NA
3,000/Tape & Reel
-7
NA
Notes:
14. Ammo Box is for SIP-3 Spread Lead.
15. Bulk is for SIP-3 Straight Lead.
Marking Information
(1)
Package Type: SOT23
( Top View )
XX Y W X
Part Number
AH3781
(2)
XX : Identification code
Y : Year 0 to 9
W : Week : A to Z : 1 to 26 week;
a to z : 27 to 52 week; z represents
52 and 53 week
X : Internal code
Package
SOT23
Identification Code
WX
Package Type: SIP-3
( Top View )
Part Number
3781
Y WW X
Part Number
AH3781
AH3781
Document number: DS37903 Rev. 1 - 2
Y : Year : 0~9
WW : Week : 01~52, "52" represents
52 and 53 week
X : Internal Code
Package
SIP-3
8 of 13
www.diodes.com
Identification Code
3781
September 2015
© Diodes Incorporated
AH3781
Package Outline Dimensions (All dimensions in mm.)
(1)
Package Type: SOT23
All 7°
H
K1
GAUGE PLANE
0.25
J
K
SOT23
Dim
Min
Max
Typ
A
0.37
0.51
0.40
B
1.20
1.40
1.30
C
2.30
2.50
2.40
D
0.89
1.03 0.915
F
0.45
0.60 0.535
G
1.78
2.05
1.83
H
2.80
3.00
2.90
J
0.013 0.10
0.05
K
0.890 1.00 0.975
K1
0.903 1.10 1.025
L
0.45
0.61
0.55
L1
0.25
0.55
0.40
M
0.085 0.150 0.110
a
8°
All Dimensions in mm
a
M
A
L
C
L1
B
D
F
G
0.17/0.37
Min/Max
PART
MARKING
SURFACE
0.5/0.7
PRELIMINARY - CONFIDENTIAL
Please see AP02002 at http://www.diodes.com/datasheets/ap02002.pdf for the latest version.
Die
Hall Sensor
Pin1
1.4/1.5
Sensor Location
AH3781
Document number: DS37903 Rev. 1 - 2
9 of 13
www.diodes.com
September 2015
© Diodes Incorporated
AH3781
Package Outline Dimensions (cont.) (All dimensions in mm.)
Please see AP02002 at http://www.diodes.com/datasheets/ap02002.pdf for the latest version.
Package Type: SIP-3 Bulk
SIP-3 (Bulk)
Dim
Min
Max
A
3.9
4.3
a1
5° Typ
a2
5°Typ
a3
45° Typ
a4
3°Typ
B
2.8
3.2
C
1.40
1.60
D
0.33
0.432
E
0.40
0.508
F
0
0.2
G
1.24
1.30
H
2.51
2.57
J
0.35
0.43
L
14.0
15.0
N
0.63
0.84
P
1.55
All Dimensions in mm
L
a1
J
a2
B
P
N
D
C
A
a3
E
a4
G H
F
Min/Max
0.63/0.84
0.27/0.48
1.90/2.10
1.05/1.25
PART
MARKING
SURFACE
Hall Sensor
1
2
Die
PRELIMINARY - CONFIDENTIAL
(2)
PART
MARKING
SURFACE
3
Sensor Location
AH3781
Document number: DS37903 Rev. 1 - 2
10 of 13
www.diodes.com
September 2015
© Diodes Incorporated
AH3781
Package Outline Dimensions (cont.) (All dimensions in mm.)
Please see AP02002 at http://www.diodes.com/datasheets/ap02002.pdf for the latest version.
Package Type: SIP-3 Ammo Pack
N
D
EF
SIP-3 (Ammo Pack)
Dim
Min
Max
A
3.9
4.3
a1
45° Typ
a2
3° Typ
B
2.8
3.2
C
1.40
1.60
D
0.35
0.41
E
0.43
0.48
F
0
0.2
G
2.4
2.9
N
0.63
0.84
P
1.55
All Dimensions in mm
C
A
G
a1
a2
B
P
Min/Max
0.63/0.84
0.27/0.48
1.90/2.10
1.05/1.25
PART
MARKING
SURFACE
Hall Sensor
1
2
Die
PRELIMINARY - CONFIDENTIAL
(3)
PART
MARKING
SURFACE
3
Sensor Location
AH3781
Document number: DS37903 Rev. 1 - 2
11 of 13
www.diodes.com
September 2015
© Diodes Incorporated
AH3781
Suggested Pad Layout
PRELIMINARY - CONFIDENTIAL
Please see AP02001 at http://www.diodes.com/datasheets/ap02001.pdf for the latest version.
(1)
Package Type: SOT23
Dimensions Value (in mm)
Z
2.9
X
0.8
Y
0.9
C
2.0
E
1.35
Y
Z
C
X
AH3781
Document number: DS37903 Rev. 1 - 2
E
12 of 13
www.diodes.com
September 2015
© Diodes Incorporated
AH3781
PRELIMINARY - CONFIDENTIAL
IMPORTANT NOTICE
DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
(AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes
without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the
application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or
trademark rights, nor the rights of others. Any Customer or user of this document or products described herein in such applications shall assume
all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated
website, harmless against all damages.
Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel.
Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and
hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or
indirectly, any claim of personal injury or death associated with such unintended or unauthorized application.
Products described herein may be covered by one or more United States, international or foreign patents pending. Product names and markings
noted herein may also be covered by one or more United States, international or foreign trademarks.
This document is written in English but may be translated into multiple languages for reference. Only the English version of this document is the
final and determinative format released by Diodes Incorporated.
LIFE SUPPORT
Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express
written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:
A. Life support devices or systems are devices or systems which:
1. are intended to implant into the body, or
2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the
labeling can be reasonably expected to result in significant injury to the user.
B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the
failure of the life support device or to affect its safety or effectiveness.
Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and
acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any
use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related
information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its
representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems.
Copyright © 2015, Diodes Incorporated
www.diodes.com
AH3781
Document number: DS37903 Rev. 1 - 2
13 of 13
www.diodes.com
September 2015
© Diodes Incorporated
Similar pages