MLX16305 Datasheet, PDF (17/29 Pages) Melexis Microelectronic Systems – Interlock switch sensor interface IC

MLX16305
Interlock switch sensor interface IC
11. How to predict the system operating zone
11.1. VMEASout limits
The worst case output voltages, including measurement errors, on the MEAS_OUT pin can be predicted
with following formulas:
• For 5mA < I_SENSE ≤ 40mA
- V_MEASOUTmin = [I_SENSE /10 * (1 - %Meas_Ierr1) + Ioffsetmin ] * R_REF * 0.9
- V_{MEASOUT max} = [I_SENSE /10 * (1 + %Meas_Ierr1) + Ioffsetmax ] * R_REF * 0.9
• For I_SENSE ≤ 5mA
- V_MEASOUTmin = [I_SENSE/ 10 - IMeas_Ierr2 + Ioffsetmin ] * R_REF * 0.9
- V_MEASOUTmax = [I_SENSE/ 10 + IMeas_Ierr2 + Ioffsetmax ] * R_REF * 0.9
11.2. Isense limits
Vsup
25V
16.25V
Isense
The operating range, and the
corresponding maximum Isense,
is defined by the Vsup-Vref range as
shown in the graph.
11V
10.5V
9.5V
8V
<30mA
<40mA
<45mA
NOP
No OPeration allowed
3V 4.5V
7V 8.25V
Vref
Other limiting specifications are:
1) Absolute maximum allowable Isense < 90mA:
Under no condition the Isense current should be larger than 90mA, in order to avoid permanent damage
to the IC.
2) Minimum Current limitation threshold: see Overcurrent limitation (next paragraph)
3) Overtemperature shutdown: see Overtemperature Detection
3901016305
Rev. 005
Page 17 of 29
Data Sheet
Oct/06