Allegro Multimedia A1301 Benutzerhandbuch

The A1301 and A1302 are continuous-time, ratiometric, linear 
Hall-effect sensors. They are optimized to accurately provide 
a voltage output that is proportional to an applied magnetic 
field. These devices have a quiescent output voltage that is 
50% of the supply voltage. Two output sensitivity options are 
provided: 2.5 mV/G typical for the A1301, and 1.3 mV/G 
typical for the A1302. 
The Hall-effect integrated circuit included in each device 
includes a Hall sensing element, a linear amplifier, and a 
CMOS Class A output structure. Integrating the Hall sensing 
element and the amplifier on a single chip minimizes many 
of the problems normally associated with low voltage level 
analog signals.
High precision in output levels is obtained by internal gain 
and offset trim adjustments made at end-of-line during the 
manufacturing process.
These features make the  A1301 and A1302 ideal for use in 
position sensing systems, for both linear target motion and 
rotational target motion. They are well-suited for industrial 
applications over extended temperature ranges, from –40°C 
to 125°C.
Two device package types are available: LH, a 3-pin SOT23W 
type for surface mount, and UA, a 3-pin ultramini SIP for 
through-hole mount. They are lead (Pb) free (suffix, –T) with 
100% matte tin plated leadframes.

A1301-DS, Rev. 5

▪ Low-noise 

output

▪  Fast power-on time
▪  Ratiometric rail-to-rail output
▪  4.5 to 6.0 V operation
▪ Solid-state 

reliability

▪  Factory-programmed at end-of-line for optimum 

performance

▪  Robust ESD performance 

Amp

GND

VOUT

VCC

Out

Offset

Trim

Control

Gain

V+

Voltage

Regulator

Filte

r

CBYPASS