MLX90288

SMD Programmable Linear Hall Sensor IC

Featuring Analog Ratiometric Output

3901090288

Page 6 of 19

Rev 002

May/12

5.5 Accuracy Specification

Item

Symbol

Remark

Min

Typ

Max

Unit

Output DAC Resolution

12 bits

0.0244

Output DAC Linearity

– 1

+ 1

– 2

+ 2

Ratiometric Error

(1)

with TEMPTC=0

– 0.1

+ 0.1

with TEMPTC=128

– 0.2

+ 0.2

Output Noise

(2)

RG = 4, FG = 800

FILTCODE = 4

0.12

0.18

RG = 7, FG = 800

FILTCODE = 4

0.13

0.2

RG = 4, FG = 4095

FILTCODE = 4

0.75

1.1

RG = 7, FG = 4095

FILTCODE = 4

1

1.5

Thermal Output Quiescent

(Offset) Drift

∆

OQ

RG = 4

– 10

+ 10

RG = 5

– 10

+ 10

RG = 6

– 15

+ 15

RG = 7

– 20

+ 20

Thermal Sensitivity Drift

(3)

∆

No magnet TC

– 150

0

+ 150

ppm/°C

Using 1

order magnet TC

– 200

0

+ 200

ppm/°C

Sensitivity Thermal

Hysteresis

∆

After full thermal

excursion

– 0.5

± 0.2

+ 0.5

%

Table 5: Accuracy Specification

(1) Ratiometric performance of the IC is measured as a difference in output voltage (expressed as

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.