A1369
Customer-Programmable Linear Hall-Effect Sensor
Optimized for Use in Current Sensing Applications
Not for New Design
These parts are in production but have been determined to be
NOT FOR NEW DESIGN. This classification indicates that sale of
this device is currently restricted to existing customer applications.
The device should not be purchased for new design applications
because obsolescence in the near future is probable. Samples are no
longer available.
Date of status change: July 2, 2018
Recommended Substitutions:
For existing customer transition, and for new customers or new appli-
cations, refer to the
ACS73369.
NOTE: For detailed information on purchasing options, contact your
local Allegro field applications engineer or sales representative.
Allegro MicroSystems, LLC reserves the right to make, from time to time, revisions to the anticipated product life cycle plan
for a product to accommodate changes in production capabilities, alternative product availabilities, or market demand. The
information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, LLC assumes no respon-
sibility for its use; nor for any infringements of patents or other rights of third parties which may result from its use.
A1369
Customer-Programmable Linear Hall-Effect Sensor
Optimized for Use in Current Sensing Applications
•
Customer-programmable offset and sensitivity
•
Sensitivity and QVO temperature coefficients
programmed at Allegro for improved accuracy
•
Output value decreases with south magnetic field and
increases with north magnetic field.
•
3-pin SIP package for easy integration with magnetic
concentrator
•
Low noise, moderate bandwidth analog output
•
High-speed chopping scheme minimizes QVO drift over
temperature
•
Temperature-stable quiescent voltage output and
sensitivity
•
Precise recoverability after temperature cycling
•
Output voltage clamps provide short-circuit diagnostic
capabilities
•
Undervoltage lockout (UVLO)
•
Wide ambient temperature range: –40°C to 85°C
•
Immune to mechanical stress
FEATURES AND BENEFITS
The Allegro™ A1369 is a customer-programmable, high
accuracy linear Hall-effect-based current sensor IC. It is
packaged in a thin 3-pin SIP to allow for easy integration with
a magnetic core to create a highly accurate current sensing
module. The programmable nature of the A1369 enables it
to account for manufacturing tolerances in the final current
sensing module assembly.
This temperature-stable device is available in a through-hole
single in-line package (TO-92). The accuracy of the device
is enhanced via programmability on the output pin for end-
of-line optimization without the added complexity and cost of
a fully programmable device. The device features One-Time-
Programming (OTP), using nonvolatile memory, to optimize
device sensitivity and the quiescent output voltage (QVO)
(output with no magnetic field) for a given application or
circuit. The A1369 also allow for optimized performance over
temperature through programming the temperature coefficient
for both Sensitivity and QVO at Allegro end-of-line test.
These ratiometric Hall-effect sensor ICs provide a voltage
output that is proportional to the applied magnetic field. The
quiescent voltage output is user-adjustable around 50% of the
supply voltage, and the output sensitivity is programmable
within a range of –8.5 mV/G to –12.5 mV/G for the A1369-10
and –22 mV/G to –26 mV/G for the A1369-24.
The features of this linear device makes it ideal for use
in industrial applications requiring high accuracy and are
guaranteed over a wide temperature range, –40°C to 85°C.
DESCRIPTION
PACKAGE:
3-pin SIP
(suffix UA)
Not to scale
V+
Tuned Filter
V
CC
Dynamic Offset
Cancellation
V
OUT
/
Programming
Sensitivity and
Sensitivity TC
Offset and
Offset TC
Trim Control
GND
Functional Block Diagram
A1369-DS, Rev. 5
MCO-0000370
July 2, 2018
A1369
Customer-Programmable Linear Hall-Effect Sensor
Optimized for Use in Current Sensing Applications
SELECTION GUIDE*
Part Number
A1369EUA-10-T
A1369EUA-24-T
*Contact Allegro
™
for additional packing options.
Sensitivity Range (mV/G)
–8.5 to –12.5
–22 to –26
ABSOLUTE MAXIMUM RATINGS
Characteristic
Forward Supply Voltage
Reverse Supply Voltage
Forward Output Voltage
Reverse Output Voltage
Output Source Current
Output Sink Current
Operating Ambient Temperature
Maximum Junction Temperature
Storage Temperature
Symbol
V
CC
V
RCC
V
OUT
V
ROUT
I
OUT(SOURCE)
I
OUT(SINK)
T
A
T
J(max)
T
stg
V
OUT
to GND
V
CC
to V
OUT
Notes
Rating
8
–0.1
15
–0.1
2
10
–40 to 85
165
–65 to 170
Unit
V
V
V
V
mA
mA
°C
°C
°C
THERMAL CHARACTERISTICS:
May require derating at maximum conditions; see application information
Characteristic
Package Thermal Resistance
Symbol
R
θJA
Test Conditions*
Package UA, on 1-layer PCB with copper limited to solder
pads
Value
165
Unit
°C/W
*Additional thermal information available on the Allegro website.
Table of Contents
Features and Benefits
........................................................... 1
Description
.......................................................................... 1
Packages
............................................................................ 1
Functional Block Diagram
..................................................... 1
Selection Guide
................................................................... 2
Absolute Maximum Ratings
................................................... 2
Thermal Characteristics
........................................................ 2
Pinout Diagram and Terminal List
........................................... 3
Electrical Characteristics
....................................................... 4
Characteristic Definitions
....................................................... 7
Chopper Stabilization Technique
.......................................... 10
Programming Guidelines
......................................................11
Overview
........................................................................11
Definition of Terms
...........................................................11
Programming Procedures
................................................... 13
Mode/Parameter Selection
............................................... 13
Try Mode Bit Field Addressing
.......................................... 13
Fuse Blowing
.................................................................. 14
Locking the Device
.......................................................... 15
Additional Guidelines
....................................................... 15
Programming Modes
.......................................................... 16
Try Mode
....................................................................... 16
Blow Mode
..................................................................... 16
Read Mode
.................................................................... 16
Programming State Machine
............................................... 18
Initial State
..................................................................... 19
Mode Selection State
...................................................... 19
Parameter Selection State
............................................... 19
Bit Field Addressing State
................................................ 19
Fuse Blowing State
......................................................... 19
Package Outline Drawing
.................................................... 21
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
2
A1369
Customer-Programmable Linear Hall-Effect Sensor
Optimized for Use in Current Sensing Applications
PINOUT DIAGRAM AND TERMINAL LIST TABLE
1
2
3
Package UA, 3-Pin SIP Pinout Diagram
Terminal List Table
Number
1
2
3
Name
VCC
GND
VOUT
Function
Input power supply; tie to GND with
bypass capacitor
Ground
Output Signal; also used for
programming
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
3
A1369
Customer-Programmable Linear Hall-Effect Sensor
Optimized for Use in Current Sensing Applications
ELECTRICAL CHARACTERISTICS
: Valid over T
A
, C
BYPASS
= 0.1 µF, V
CC
= 5 V, unless otherwise noted
Characteristic
ELECTRICAL CHARACTERISTICS
Supply Voltage
Undervoltage Threshold
[1]
Supply Current
Power-On Time
[2]
Delay to Clamp
[3]
Supply Zener Clamp Voltage
Internal Bandwidth
Chopping Frequency
[4]
OUTPUT CHARACTERISTICS
Output Referred
Noise
[5]
V
CC
V
UVLOHI
V
UVLOLOW
I
CC
t
PO
t
CLP
V
Z
BW
i
f
C
T
A
= 25°C (device power on)
T
A
= 25°C (device power on)
No load on V
OUT
T
A
= 25°C, C
L(PROBE)
= 10 pF
T
A
= 25°C, C
L
= 10 nF
T
A
= 25°C, I
CC
= 24.5 mA
Small signal –3 dB
T
A
= 25°C
T
A
= 25°C,
Sens = 10.5 mV/G, C
L
= 1 nF
T
A
= 25°C,
Sens = 24 mV/G, C
L
= 1 nF
T
A
= 25°C,
No load out V
OUT
, f <<BW
i
V
OUT
to GND
V
OUT
to GND
T
A
= 25°C, B = +X G;
R
L
= 10 kΩ (V
OUT
to GND)
T
A
= 25°C, B = –X G;
R
L
= 10 kΩ (V
OUT
to GND)
4.5
−
2.5
−
−
–
6
–
–
5.0
−
−
9
60
30
7.3
7
400
5.5
3
–
12
−
–
–
–
–
V
V
V
mA
µs
µs
V
kHz
kHz
Symbol
Test Conditions
Min.
Typ.
Max.
Unit
−
–
−
−
4.7
−
4.55
–
10
24
1.5
<1
–
–
–
–
–
−
−
−
–
1
–
0.45
V
N
V
NRMS
R
OUT
R
L
C
L
V
CLP(HIGH)
V
CLP(LOW)
mV
(p-p)
mV
(p-p)
mG/√Hz
Ω
kΩ
nF
V
V
Input Referred Noise Density
DC Output Resistance
Output Load Resistance
Output Load Capacitance
Output Voltage
Clamp
[6]
INITIAL QVO and SENSITIVITY
Pre-Programming Quiescent Voltage
Output
Pre-Programming Sensitivity
Target Sensitivity Temperature
Coefficient
Target Quiescent Voltage Output Drift
V
OUT(Q)init
Sens
init
TC
Sens
ΔV
OUT(Q)
B = 0 G, T
A
= 25°C
A1369-10, T
A
= 25°C
A1369-24, T
A
= 25°C
T
A
= 85°C, calculated relative to 25°C
T
A
= 85°C, calculated relative to 25°C
−
–
–
–
–
2.5
–10
–24
0
0
–
–
–
–
–
V
mV/G
mV/G
%/°C
%/°C
Continued on the next page…
power-up, the output of the A1369 will be held low until V
CC
exceeds V
UVLOHI
. Once powered, the output will remain valid until V
CC
drops below V
UVLOLO
, when the
output will be pulled low.
[2]
See Characteristic Definitions.
[3]
See Characteristic Definitions.
[4]
f varies up to approximately ±20% over the full operating ambient temperature range and process.
C
[5]
Value is derived as 6 sigma value from the spectral noise density.
[6]
V
CLP(LOW)
and V
CLP(HIGH)
will scale with V
CC
due to ratiometry.
[1]
On
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
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