A1367
Low-Noise, High-Precision, Programmable Linear Hall-Effect Sensor IC
with Regulated Supply, Advanced Temperature Compensation,
and High-Bandwidth (240 kHz) Analog Output
•
240 kHz nominal bandwidth achieved via proprietary
packaging and chopper stabilization techniques
•
On-board supply regulator with reverse-battery protection
•
Proprietary segmented linear temperature compensation
(TC) technology provides a typical accuracy of 1% over
the full operating temperature range
•
Customer-programmable, high-resolution offset and
sensitivity trim
•
Factory-programmed sensitivity and quiescent
output voltage TC with extremely stable temperature
performance
•
High-sensitivity Hall element for maximum accuracy
•
Extremely low noise and high resolution achieved via
proprietary Hall element and low-noise amplifier circuits
Continued on the next page…
FEATURES AND BENEFITS
The Allegro™ A1367 programmable linear Hall-effect
current sensor IC has been designed to achieve high accuracy
and resolution without compromising bandwidth. This goal
is achieved through new proprietary linearly interpolated
temperature compensation technology that is programmed
at the Allegro factory and provides sensitivity and offset that
are virtually flat across the full operating temperature range.
Temperature compensation is performed in the digital domain
with integrated EEPROM technology while maintaining a
240 kHz bandwidth analog signal path, making this device
ideal for HEV inverter, DC-to-DC converter, and electric power
steering (EPS) applications.
This ratiometric Hall-effect sensor IC provides a voltage output
that is proportional to the applied magnetic field. The customer
can configure the sensitivity and quiescent (zero field) output
voltage through programming on the VCC and output pins,
to optimize performance in the end application. The quiescent
output voltage is user-adjustable, around 50% (bidirectional
configuration) or 10% (unidirectional configuration) of the
supply voltage, V
CC
, and the output sensitivity is adjustable
within the range of 0.6 to 6.4 mV/G.
Continued on the next page…
DESCRIPTION
PACKAGE:
4-Pin SIP (suffix KT)
Not to scale
VCC
(Programming)
Regulator
C
BYPASS
Programming
Control
Charge Pump
Pulse Generator
Broken
Ground
Detection
To all
subcircuits
Temperature
Sensor
EEPROM and
Control Logic
Active Temp.
Compensation
Dynamic Offset Cancellation
Sensitivity Control
Offset Control
Output
Clamps
VOUT
(Programming)
Signal Recovery
Push/Pull
Output Driver
C
L
GND
Functional Block Diagram
A1367-DS, Rev. 5
MCO-0000339
May 23, 2018
A1367
Low-Noise, High-Precision, Programmable Linear Hall-Effect Sensor IC
with Regulated Supply, Advanced Temperature Compensation,
and High-Bandwidth (240 kHz) Analog Output
DESCRIPTION (continued)
FEATURES AND BENEFITS (continued)
•
Patented circuits suppress IC output spiking during fast current
step inputs
•
Open circuit detection on ground pin (broken wire)
•
Selectable sensitivity range between 0.6 and 6.4 mV/G
through use of coarse sensitivity program bits
•
User-selectable ratiometric behavior of sensitivity, quiescent
voltage, and clamps (ratiometry can be disabled), for simple
interface with application A-to-D converter (ADC)
•
Precise recoverability after temperature cycling
•
Output voltage clamps provide short-circuit diagnostic
capabilities
•
Wide ambient temperature range: –40°C to 150°C
•
Immune to mechanical stress
•
Extremely thin package: 1 mm case thickness
•
AEC-Q100 automotive qualified
The sensor IC incorporates a highly sensitive Hall element with
a BiCMOS interface integrated circuit that employs a low-noise
small-signal high-gain amplifier, a clamped low-impedance output
stage, and a proprietary, high-bandwidth dynamic offset cancellation
technique. These advances in Hall-effect technology work together
to provide an industry-leading sensing resolution at the full 240 kHz
bandwidth. Broken ground wire detection as well as user-selectable
output voltage clamps also are built into this device for high reliability
in automotive applications.
Device parameters are specified across an extended ambient
temperature range: –40°C to 150°C. The A1367 sensor IC is provided
in an extremely thin case (1 mm thick), 4-pin SIP (single in-line
package, suffix KT) that is lead (Pb) free, with 100% matte-tin
leadframe plating.
SELECTION GUIDE
Part Number
A1367LKTTN-1B-T
A1367LKTTN-2B-T
A1367LKTTN-2U-T
A1367LKTTN-5B-T
[1]
Contact Allegro
[2]
Allegro
Package
4-pin SIP
4-pin SIP
4-pin SIP
4-pin SIP
Packing
[1]
4000 pieces per 13-in. reel
4000 pieces per 13-in. reel
4000 pieces per 13-in. reel
4000 pieces per 13-in. reel
Sensitivity Range
[2]
(mV/G)
SENS_COARSE 00: 0.6 to 1.3
SENS_COARSE 01: 1.3 to 2.9
SENS_COARSE 01: 1.3 to 2.9
SENS_COARSE 10: 2.9 to 6.4
for additional packing options
recommends against changing Coarse Sensitivity settings when programming devices that will be used in production. Each A1367
has been factory temperature compensated at a specific sensitivity range, and changing the coarse bits setting could cause sensitivity drift
through temperature range (ΔSens
TC
) to exceed specified limits.
Specifications
Characteristic Definitions
Functional Description
Absolute Maximum Ratings
Thermal Characteristics
Pinout Diagram and Terminal List Table
Operating Characteristics
Characteristic Performance Data
3
Table of Contents
Programming Sensitivity and Quiescent
Voltage Output
Coarse Sensitivity
Memory-Locking Mechanisms
Power-On Reset (POR) Operation
Detecting Broken Ground Wire
Chopper Stabilization Technique
11
16
3
3
4
5
8
Programming Guidelines
16
16
16
17
18
19
Package Outline Drawing
Serial Communication
Writing Access Code
Writing to Volatile Memory
Writing to Nonvolatile Memory
Reading from EEPROM or Volatile Memory
Enabling/Disabling Ratiometry
EEPROM Cell Organization
Diagnostic Clamps
EEPROM Error Checking and Correction (ECC)
Detecting ECC Error
20
26
20
22
22
22
22
24
24
25
25
25
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
2
A1367
Low-Noise, High-Precision, Programmable Linear Hall-Effect Sensor IC
with Regulated Supply, Advanced Temperature Compensation,
and High-Bandwidth (240 kHz) Analog Output
SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS
Characteristic
Forward Supply Voltage
Reverse Supply Voltage
Forward Output Voltage
Reverse Output Voltage
Output Source Current
Output Sink Current
Maximum Number of EEPROM Write
Cycles
Operating Ambient Temperature
Storage Temperature
Maximum Junction Temperature
Symbol
V
CC
V
RCC
V
OUT
V
ROUT
I
OUT(source)
I
OUT(sink)
EEPROM
w(max)
T
A
T
stg
T
J
(max)
L temperature range
T
J
(max) should not be exceeded
V
OUT
< V
CC
+ 2 V
Difference between V
CC
and output should not exceed 20 V
VOUT to GND
VCC to VOUT
Notes
Rating
15
–15
16
–6
2.8
10
100
–40 to 150
–65 to 165
165
Unit
V
V
V
V
mA
mA
cycle
°C
°C
°C
THERMAL CHARACTERISTICS:
May require derating at maximum conditions; see application information
Characteristic
Package Thermal Resistance
Symbol
R
θJA
Test Conditions*
On 1-layer PCB with exposed copper limited to solder pads
Value
174
Unit
°C/W
*Additional thermal information available on the Allegro website
Power Dissipation versus Ambient Temperature
900
800
700
Power Dissipation, PD (mW)
600
(R
500
400
300
200
100
0
20
qJ
A
=
17
4
ºC
/W
)
40
60
80
100
120
Temperature, TA (°C)
140
160
180
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
3
A1367
Low-Noise, High-Precision, Programmable Linear Hall-Effect Sensor IC
with Regulated Supply, Advanced Temperature Compensation,
and High-Bandwidth (240 kHz) Analog Output
PINOUT DIAGRAM AND TERMINAL LIST TABLE
1
2 3 4
KT Package Pinout Diagram
(Ejector pin mark on opposite side)
Terminal List Table
Number
1
2
3
4
Name
VCC
VOUT
NC
GND
Function
Input Power Supply, use bypass capacitor to connect to ground;
also used for programming
Output Signal, also used for programming
No connection; connect to GND for optimal ESD performance
Ground
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
4
A1367
Low-Noise, High-Precision, Programmable Linear Hall-Effect Sensor IC
with Regulated Supply, Advanced Temperature Compensation,
and High-Bandwidth (240 kHz) Analog Output
OPERATING CHARACTERISTICS
: Valid through the full operating temperature range, T
A
, C
BYPASS
= 0.1 µF, V
CC
= 5 V, un-
less otherwise specified
Characteristic
ELECTRICAL CHARACTERISTICS
Supply Voltage
Supply Current
Power-On Time
[2]
Temperature Compensation
Power-On Time
[2]
Power-On Reset Voltage
[2]
Power-On Reset Hysteresis
Power-On Reset Release Time
[2]
Power-On Reset Analog Delay
Supply Zener Clamp Voltage
Internal Bandwidth
Chopping Frequency
[3]
OUTPUT CHARACTERISTICS
Propagation Delay Time
[2]
Rise Time
[2]
t
pd
t
r
T
A
= 25°C, magnetic field step of 400 G,
C
L
= 1 nF, Sens = 2 mV/G
T
A
= 25°C, magnetic field step of 400 G,
C
L
= 1 nF, Sens = 2 mV/G
T
A
= 25°C, magnetic field step of 400 G,
C
L
= 1 nF, Sens = 2 mV/G, measurement of
80% input to 80% output
T
A
= 25°C, magnetic field step of 400 G,
C
L
= 1 nF, Sens = 2 mV/G, measurement of
90% input to 90% output
T
A
= 25°C, magnetic field step from 800 to
1200 G, C
L
= 1 nF, Sens = 2 mV/G
T
A
= 25°C, R
L(PULLDWN)
= 10 kΩ to GND
T
A
= 25°C, R
L(PULLUP)
= 10 kΩ to VCC
T
A
= 25°C, R
L(PULLDWN)
= 10 kΩ to GND
T
A
= 25°C, R
L(PULLDWN)
= 10 kΩ to VCC
T
A
= 25°C, R
L(PULLUP)
= 10 kΩ to VCC
T
A
= 25°C, R
L(PULLDWN)
= 10 kΩ to GND
T
A
= 25°C, CL = 1 nF, BW
f
= BW
i
Noise
[5]
V
N
T
A
= 25°C, CL = 1 nF, Sens = 2 mV/G,
BW
f
= BW
i
T
A
= 25°C, CL = 1 nF, Sens = 2 mV/G,
BW
f
= BW
i
–
–
–
1.1
2.4
1.8
–
–
–
µs
µs
µs
V
CC
I
CC
t
PO
No load on VOUT
T
A
= 25°C, C
BYPASS
= open, C
L
= 1 nF,
Sens = 2 mV/G, constant magnetic field
of 400 G
T
A
= 150°C, C
BYPASS
= open, C
L
= 1 nF,
Sens = 2 mV/G, constant magnetic field
of 400 G
T
A
= 25°C, V
CC
rising
T
A
= 25°C, V
CC
falling
T
A
= 25°C
T
A
= 25°C, V
CC
rising
T
A
= 25°C, V
CC
rising
T
A
= 25°C, I
CC
= 30 mA
Small signal –3 dB, C
L
= 1 nF, T
A
= 25°C
T
A
= 25°C
4.5
–
–
5
11
80
5.5
16.25
–
V
mA
µs
Symbol
Test Conditions
Min.
Typ.
Max.
Unit
[1]
t
TC
V
PORH
V
PORL
V
PORHYS
t
PORR
t
PORA
V
z
BW
i
f
C
–
3.75
–
–
–
–
18
–
–
146
4
3.5
500
32
46
21
240
1
–
4.2
–
–
–
–
–
–
–
µs
V
V
mV
µs
µs
V
kHz
MHz
Response Time
[2]
t
RESPONSE
–
–
4.55
0.15
4.7
–
–
–
–
–
–
2.2
10
–
–
–
–
V
CC
100
1.4
12.6
2.1
–
–
4.85
0.45
–
400
–
–
–
–
µs
µs
V
V
V
mV
V
mV
mG/√(Hz)
Delay to Clamp
[2]
Output Voltage Clamp
[4]
Output Saturation Voltage
[2]
Broken Wire Voltage
[2]
t
CLP
V
CLP(HIGH)
V
CLP(LOW)
V
SAT(HIGH)
V
SAT(LOW)
V
BRK(HIGH)
V
BRK(LOW)
mV
p-p
mV
RMS
–
Continued on the next page…
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
5
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