A1373 and A1374
A1373-DS, Rev. 3
Worcester, Massachusetts 01615-0036 (508) 853-5000
115 Northeast Cutoff, Box 15036
www.allegromicro.com
Allegro MicroSystems, Inc.
AB SO LUTE MAX I MUM RAT INGS
Supply Voltage, V
CC
..........................................16 V
Reverse-Supply Voltage, V
RCC
........................–16 V
Output Voltage
1
, V
OUT
.......................................16 V
Reverse-Output Voltage, V
ROUT
.....................–0.1 V
Output Current
Source, I
OUTSOURCE
................................... 3 mA
Sink, I
OUTSINK
.......................................... 10 mA
Operating Temperature
Ambient, T
A
, Range E..................–40ºC to 85ºC
Ambient, T
A
, Range L................–40ºC to 150ºC
Maximum Junction, T
J(max)
........................165ºC
Storage Temperature, T
S
..................–65ºC to 170ºC
High Precision, Output Pin Programmable
Linear Hall Effect Sensors
Features and Benefits
Package KB, 3-pin SIP
The A1373 and A1374 high precision linear Hall effect sensors are sensitive, tem-
perature stable, linear devices with externally programmable features. This device
family incorporates a chopper-stabilized amplifier, voltage regulator, program-
ming logic, and an output amplifier on a single IC. The patented dynamic offset
cancellation used with a chopper-stabilization technique provides extremely low
offset and minimal temperature drift. A high frequency clock is used for chopping,
to ensure high frequency signal processing capability. The A1373 and A1374 are
ideal for use in automotive and industrial linear position-sensing applications that
require increased reliability and accuracy over conventional contacting-potentiom-
eter solutions. Key applications include: throttle position sensors, pedal position
sensors, and suspension height sensors.
The design and manufacturing flexibility of the A1373 and A1374 complement
the Allegro linear Hall effect family of devices by offering programmable gain,
quiescent offset voltage for unipolar or bipolar operation, temperature coef-
ficient, clamps, and polarity. The device can be set up in a magnetic circuit
and programmed with a train of serial pulses via the output pin. Once the right
combination of gain, quiescent output voltage, and temperature coefficient has
been selected, the codes can be locked for one-time programming. In this manner,
manufacturing tolerances can be reduced and the assembly process can be simpli-
fied.
These devices are available in the KB package, a 3-pin SIP (single inline pack-
age). The lead (Pb) free version has a 100% matte tin plated leadframe.
1
When blowing fuses during device programming, a
voltage of 28 V may be applied to VOUT.
Output pin programming
Field-programmable for optimal application integration
Selectable coarse and fine gain and quiescent output voltage
Selectable sensitivity temperature coefficient
Selectable output clamp voltage level, including no-clamp (rail-to-rail)
Selectable output polarity
Unipolar or bipolar operation
Ratiometric sensitivity, clamps, and quiescent output voltage
Chopper-stabilized Hall technique
Wide operating temperature range
On-chip regulator for over/under voltage protection
On-chip regulator provides EMI robustness
Wide lead-spacing with KB package
1
2
3
1. VCC
2. GND
3. VOUT (Programming)