MLX90288 Datasheet, PDF (6/19 Pages) Melexis Microelectronic Systems – SMD Programmable Linear Hall Sensor IC Featuring Analog Ratiometric Output

MLX90288
SMD Programmable Linear Hall Sensor IC
Featuring Analog Ratiometric Output
5.5 Accuracy Specification
Operating parameter valid for T_A = – 40°C to + 150°C & V_DD = + 4.5V to + 5.5V (unless specified otherwise).
Item
Output DAC Resolution
Output DAC Linearity
Ratiometric Error⁽¹⁾
Output Noise⁽²⁾
Thermal Output Quiescent
(Offset) Drift
Thermal Sensitivity Drift⁽³⁾
Sensitivity Thermal
Hysteresis
Symbol
LSB_DAC
DNL_DAC
INL_DAC
OUT_ratiom
OUT_noise
∆^T V_OQ
∆^T S
∆^H S
Remark
12 bits
with TEMPTC=0
with TEMPTC=128
RG = 4, FG = 800
FILTCODE = 4
RG = 7, FG = 800
FILTCODE = 4
RG = 4, FG = 4095
FILTCODE = 4
RG = 7, FG = 4095
FILTCODE = 4
RG = 4
RG = 5
RG = 6
RG = 7
No magnet TC
Using 1^st and 2^nd
order magnet TC
After full thermal
excursion
Min
–1
–2
– 0.1
– 0.2
– 10
– 10
– 15
– 20
– 150
– 200
– 0.5
Typ
0.0244
0.12
Max
+1
+2
+ 0.1
+ 0.2
0.18
0.13
0.2
0.75
1.1
1
1.5
+ 10
+ 10
+ 15
+ 20
0
+ 150
0
+ 200
± 0.2 + 0.5
Unit
%V_DD
LSB_DAC
LSB_DAC
%V_DD
%V_DD
mV_RMS
mV_RMS
mV_RMS
mV_RMS
LSB_DAC
LSB_DAC
LSB_DAC
LSB_DAC
ppm/°C
ppm/°C
%
Table 5: Accuracy Specification
(1) Ratiometric performance of the IC is measured as a difference in output voltage (expressed as
%V_DD) between the nominal case with VDD = 5V and the limits of the supply ratiometric operating
range (4.5V and 5.5V). The difference between TEMPTC = 0 (or TEMPSENSOR disabled altogether)
and TEMPTC = 128 originates in the fact that the on-chip temperature is also a function of the supply
voltage. Since the TEMPTC changes the gain of the IC to compensate for the magnet TC, and it
relies on the fact that the on-chip temperature is the same as the magnet temperature, an extra error
occurs compared to TEMPTC = 0 case.
(2) The noise measurements are performed on the recommended application diagram depicted under
Section 10, with a supply voltage of 5V at room temperature. Increased capacitance values
compared to the recommended application diagram, contribute to lower output noise. For peak-to-
peak values, the RMS value is typically multiplied by a factor of 6.
(3) The Sensitivity Thermal Drift is within these boundaries for all ICs with the default setting for gain
compensation i.e. fixed to 1, which is obtained by setting TEMPTC to 0, but leaving the
TEMPSENSOR bit set (see Section 7). If the value is not fixed to 1, the sensitivity of the IC will
exhibit a sensitivity thermal drift curve such as the one shown in Figure 3 (if SECONDORDERTC is
set) or with a linear temperature coefficient (if SECONDORDERTC is cleared) depending on the
setting of TEMPTC, but ±150ppm/°C. The total system sensitivity drift is specified as ±200ppm/°C to
cover resolution errors and non-linearities.
3901090288
Rev 002
Page 6 of 19
May/12