A1334
Precision Hall-Effect Angle Sensor IC
Not for New Design
This part is in production but has been determined to be NOT FOR
NEW DESIGN. Sale of this part is currently restricted to existing
customer programs already using the part. The part should not be
purchased for new programs or designed into new applications.
Samples are no longer available.
Date of status change: December 5, 2016
Recommended Substitutions:
A1338 Family
For existing customer transition, and for new customers or new appli-
cations, contact Allegro Sales.
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.
A1334
Precision Hall-Effect Angle Sensor IC
FEATURES AND BENEFITS
• Automotive AEC-Q100 qualified
• Contactless 0° to 360° angle sensor IC, for angular
position, rotational speed, and direction measurement
• Available with either a single die or dual independent die
housed within a single package
• Circular Vertical Hall (CVH) technology provides a
single-channel sensor system, with air-gap independence
• 12-bit resolution possible in low RPM mode, 10-bit
resolution in high RPM mode
• Angle Refresh Rate (output rate) configurable between
25 and 3200 µs through EEPROM programming
• Capable of sensing magnet rotational speeds in excess of
7600 rpm
• SPI interface allows use of multiple independent sensors
for applications requiring redundancy
• EEPROM programmable angle reference (0°) position
and rotation direction (CW or CCW)
• Absolute maximum V
CC
of 26.5 V for automotive
battery-powered applications
DESCRIPTION
The A1334 is a 360° angle sensor IC that provides contactless
high-resolution angular position information based on magnetic
Circular Vertical Hall (CVH) technology. It has a system-on-
chip (SoC) architecture that includes: a CVH front end, digital
signal processing, and a digital (SPI) output. The A1334 is
ideal for automotive applications requiring high-speed 0° to
360° angle measurements, such as electronic power steering
(EPS) and throttle systems.
The A1334 supports a Low RPM mode for slower rate appli-
cations and a High RPM mode for high-speed applications.
High RPM mode is for applications that require higher refresh
rates to minimize error due to latency. Low RPM mode is for
applications that require higher resolution operating at lower
angular velocities.
As part of its signal processing functions, the A1334 includes
automotive-grade temperature compensation to provide
accurate output over the full operating temperature and voltage
ranges. The A1334 also includes EEPROM technology for
end-of-line calibration.
The A1334 is available as a single die in a 14-pin TSSOP, or
dual die in a 24-pin TSSOP. Both packages are lead (Pb) free
with 100% matte-tin leadframe plating.
Packages:
Not to scale
Single SoC
14-pin TSSOP (LE package)
Dual Independent SoCs
24-pin TSSOP (LE package)
BYP(1)
VCC(1)
(Programming)
To all internal circuits
Multisegment
CVH Element
Analog Front End
ADC
Bandpass
Filter
BIAS(1)
EEPROM
Calibration
Parameters
MISO(1)
CS(1)
MOSI(1)
SCLK(1)
GND(1)
xxx2
Pin number parentheses refer to chip in dual SoC variant
SPI
Interface
Data
Registers
Digital Processing
Temperature
Compensation
Internal Calibration
Zero Angle
SoC die 1
Control unit
Rack
Steering
sensor
Diagnostics
Motor
SoC die 2 (optional)
A1334 Functional Block Diagram
A1334A-DS, Rev. 6
A1334 in Electronic Power Steering (EPS)
Application
December 5, 2016
A1334
Precision Hall-Effect Angle Sensor IC
Selection Guide
Part Number
A1334LLETR-T
A1334LLETR-60-T
A1334LLETR-30-T
A1334LLETR-DD-T
A1334LLETR-DD55-T
A1334LLETR-DD30-T
System Die
Single
Single
Single
Dual
Dual
Dual
Package
14-pin TSSOP
14-pin TSSOP
14-pin TSSOP
24-pin TSSOP
24-pin TSSOP
24-pin TSSOP
Packing*
4000 pieces per 13-in. reel
4000 pieces per 13-in. reel
4000 pieces per 13-in. reel
4000 pieces per 13-in. reel
4000 pieces per 13-in. reel
4000 pieces per 13-in. reel
Notes
Optimized for 900 G Field
Optimized for 600 G Field
Optimized for 300 G Field
Optimized for 900 G Field
Optimized for 550 G Field
Optimized for 300 G Field
*Contact Allegro
™
for additional packing options.
SPECIFICATIONS
Absolute Maximum Ratings
Characteristic
Forward Supply Voltage
Reverse Supply Voltage
All Other Pins Forward Voltage
All Other Pins Reverse Voltage
Operating Ambient Temperature
Maximum Junction Temperature
Storage Temperature
Symbol
V
CC
V
RCC
V
IN
V
R
T
A
T
J
(max)
T
stg
L range
Not sampling angles
Not sampling angles
Notes
Rating
26.5
–18
5.5
0.5
–40 to 150
165
–65 to 170
Unit
V
V
V
V
ºC
ºC
ºC
THERMAL CHARACTERISTICS
may require derating at maximum conditions, see application information
Characteristic
Package Thermal Resistance
Symbol
R
θJA
LE-14 package
LE-24 package
Test Conditions*
Value
82
117
Unit
ºC/W
ºC/W
*Additional thermal information available on the Allegro website.
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
2
A1334
Precision Hall-Effect Angle Sensor IC
Pin-Out Diagrams and Terminal List Table
Terminal List Table
DGND 1
BYP 2
DGND 3
AGND 4
VCC 5
VCC 6
AGND 7
14 DGND
13 CS
12 MOSI
11 SCLK
10 MISO
9 AGND
8 BIAS
PinName
AGND_1
AGND_2
BYP_1
BYP_2
CS_1
CS_2
DGND_1
DGND_2
MISO_1
MISO_2
MOSI_1
MOSI_2
SCLK_1
SCLK_2
VCC_1
VCC_2
BIAS_1
BIAS_2
Pin Number
LE-14
4, 7, 9
–
2
–
13
–
1, 3, 14
–
10
–
12
–
11
–
5, 6
–
8
–
LE-24
4, 6
16, 18
2
14
23
11
1, 3, 24
12, 13, 15
20
8
22
10
21
9
5
17
19
7
Function
Device analog ground terminal (die 1)
Device analog ground terminal (die 2)
External bypass capacitor terminal for internal regulator (die 1)
External bypass capacitor terminal for internal regulator (die 2)
SPI Chip Select terminal, active low (die 1)
SPI Chip Select terminal, active low (die 2)
Device digital ground terminal (die 1)
Device digital ground terminal (die 2)
SPI Master Input / Slave Output (die 1)
SPI Master Input / Slave Output (die 2)
SPI Master Output / Slave Input (die 1)
SPI Master Output / Slave Input (die 2)
SPI Clock terminal (die 1)
SPI Clock terminal (die 2)
Power supply; also used for EEPROM programming (die 1)
Power supply; also used for EEPROM programming (die 2)
Bias connection; connect to ground (shown) or pull-up to 3.3 V (die 1)
Bias connection; connect to ground (shown) or pull-up to 3.3 V (die 2)
LE-14 Package
(Single SoC)
DGND_1 1
BYP_1 2
DGND_1 3
AGND_1 4
VCC_1 5
AGND_1 6
BIAS_2 7
MISO_2 8
SCLK_2 9
MOSI_2 10
CS_2 11
DGND_2 12
24 DGND_1
23 CS_1
22 MOSI_1
21 SCLK_1
20 MISO_1
19 BIAS_1
18 AGND_2
17 VCC_2
16 AGND_2
15 DGND_2
14 BYP_2
13 DGND_2
LE-24 Package
(Dual SoC)
V CC
0.1 µF
0.1 µF
BYP_1
BIAS_1
VCC_1 VCC_2
0.1 µF
BYP_2
CS_1
SCLK_1
MOSI_1
MISO_1
Host
Microprocessor
A1334
BIAS_2
Target
Magnet
CS_2
SCLK_2
MOSI_2
MISO_2
AGND_1 AGND_2 DGND_1 DGND_2
Either or both internal SoCs can be operated simultaneously. (See page 12 for circuits that require a higher level of EMC immunity.)
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Typical Application Diagram (Dual Die Version)
3
A1334
Precision Hall-Effect Angle Sensor IC
OPERATING CHARACTERISTICS
: valid over the full operating voltage and ambient temperature ranges, unless otherwise
noted
Characteristics
Electrical Characteristics
Supply Voltage
Supply Current
Undervoltage Lockout Threshold
Voltage
3
VCC Low Flag Threshold
4,5
Supply Zener Clamp Voltage
Reverse-Battery Current
Power-On Time
6,8
Bypass Pin Output Voltage
7
SPI Interface Specifications
Digital Input High Voltage
8
Digital Input Low Voltage
8
SPI Output High Voltage
SPI Output Low Voltage
SPI Clock Frequency
8
SPI Frame Rate
8
Chip Select to First SCLK Edge
8
Data Output Valid Time
8
MOSI Setup Time
8
MOSI Hold Time
8
SCLK to CS Hold Time
8
Load Capacitance
8
Magnetic Characteristics
Magnetic Field
9,10
Missing Magnet Flag
Angle Characteristics
Output
11
Effective Resolution
12
RES
ANGLE
Symbol
V
CC
I
CC
V
UVLOHI
V
UVLOLOW
V
UVLOTH
V
ZSUP
I
RCC
t
PO
V
BYP
V
IH
V
IL
V
OH
V
OL
f
SCLK
t
SPI
t
CS
t
DAV
t
SU
t
HD
t
CHD
C
L
B
MAGM
Test Conditions
Min.
4.5
Typ.
1
12
7.5
–
–
4.5
–
–
300
2.85
–
–
3.3
0.3
–
–
–
40
–
–
–
–
–
100
Max.
14.5
10
4.5
–
4.75
–
–
–
3.4
3.63
0.5
3.79
0.5
10
588
–
–
–
–
–
50
1000
–
–
–
28.33
–
68
Unit
2
V
mA
V
V
V
V
mA
µs
V
V
V
V
V
MHz
kHz
ns
ns
ns
ns
ns
pF
G
G
bit
bits
µs
µs
µs
Each die, A1334 sampling angles
Maximum V
CC
, dV/dt = 1V/ms, T
A
= 25°C,
A1334 sampling enabled
Maximum V
CC
, dV/dt = 1V/ms, T
A
= 25°C,
A1334 sampling disabled
I
CC
= I
CC
+ 3 mA, T
A
= 25°C
V
RCC
= –18 V, T
A
= 25°C
T
A
= 25°C, C
BYP
= 0.1 µF
¯¯
MOSIx, SCLKx, ¯ ¯ x pins
CS
¯¯
MOSIx, SCLKx, ¯ ¯ x pins
CS
MISOx pins, C
L
= 50 pF, T
A
= 25°C
MISOx pins, C
L
= 50 pF, T
A
= 25°C
MISOx pins, C
L
= 50 pF
¯¯
Time from ¯ ¯ x going low to SCLKx falling
CS
edge
Data output valid after SCLKx falling edge
Input setup time before SCLKx rising edge
Input hold time after SCLKx rising edge
¯¯
Hold SCLKx high time before ¯ ¯ x rising
CS
edge
Loading on digital output (MISOx) pin
Range of input field
–
–
3.5
4.35
26.5
–5
–
2.45
2.8
–
2.81
–
0.1
5.8
50
–
25
50
5
–
300
–
B = 300 G, T
A
= 25ºC, ORATE = 0
High RPM mode
18
–
–
–
–
12
10.7
25
200
60
Angle Refresh Rate
13,14
t
ANG
t
RESPONSE
Low RPM mode, AVG = 011 (varies
with AVG mode, refer to the appendix
Programming Reference)
High RPM mode (see figure 4)
18
Response Time
Continued on the next page…
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
4
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