MLX90251_12 Datasheet, PDF (2/20 Pages) Melexis Microelectronic Systems – Programmable Linear Hall Effect Sensor

MLX90251
Programmable Linear Hall Effect Sensor
1 Functional Diagram
Supply
1
OPA
Filter
OPA
OPA
4
3
Shift Register
2
Program
decoder
EEPROM
Figure 1-1 Functional Diagram
V_DD
Test
V_SS (Ground)
V_OUT
Table 1: Pin out
Pin Out
VA package
1
2
3
4
2 General Description
The MLX90251 is a CMOS Programmable,
Ratiometric Linear Hall Effect sensor IC. The
linear output voltage is proportional to the
magnetic flux density. The ratiometric output
voltage is proportional to the supply voltage. The
MLX90251 possesses active error correction
circuitry, which virtually eliminates the offset errors
normally associated with analog Hall Effect
devices. All the parameters of the MLX90251
transfer characteristic are fully programmable.
The V_OQ (V_OUT @ B = 0 Gauss), the Sensitivity,
the slope polarity, the Output Clamping levels, the
thermal Sensitivity drift, the internal bias point and
a low-pass filter are all programmable in end-user
applications. The MLX90251 has a very stable
thermal compensation for both the Sensitivity and
the V_OQ over a broad temperature range. For
traceability purpose the MLX90251 will carry a
unique ID number programmed by Melexis and 24
bits of EEPROM memory are allocated for a user
programmed serial number.
3901090251
Rev 012
Page 2 of 20
Data Sheet
Oct/2012