MLX90129_12 Datasheet, PDF (7/60 Pages) Melexis Microelectronic Systems – 13.56MHZ SENSOR TAG / DATALOGGER IC

MLX90129
13.56MHZ SENSOR TAG / DATALOGGER IC
6.6 Master SPI timing specifications
Parameter
tch
tcl
t_SU
t_HD
t_L
t_T
t_I
Description
SCK high time
SCK low time
Setup time of data, after a falling edge of SCK
Hold time of data, after a rising edge of SCK
Leading time before the first SCK edge
Trailing time after the last SCK edge
Idling time between transfers (SS=1 time)
Master side
Min
Nom Max
400
400
400
400
400
1
1600
Units
ns
ns
ns
ns
µs
µs
ns
6.7 Sensor Signal Conditioner: electrical specifications
-40°C < Temp < 105°C, unless otherwise specified. The sensor is supplied by a regulated voltage called V_ref.
Parameter
Symbol
Conditions / Comment
Min
Typ Max ^Units
GENERAL CHARACTERISTICS
Battery voltage
Vbat
Low-volt option deactivated
3.8
Low-volt option activated
2.7
5.5
V
5.5
V
SENSOR ADJUSTMENT CAPABILITY
Sensor Reference
voltage V_ref (²)
Full Span
(³)
SENSSUP1
SENSSUP2
Sens_FS
Low-volt option = 0
Low-volt option = 1
Full scale of the sensor
output voltage (Sens_CM
3.0
2.0
V_ref
/1200
3.1
3.2
V
2.1
2.2
-
V_ref /16
V
is at the specified value)
Zero offset
(¹)(³)
Sens_Off
Maximum sensor offset that - V_ref/32
-
+V_ref/32
V
can be compensated
Common-mode
voltage
Sens_CM
1/3*V_ref ½* V_ref 2/3*V_ref
V
SENSSUP1 output
Sens1_Z
7
Ω
impedance
SENSSUP2 output
Sens2_Z
15
Ω
impedance
Notes:
(¹): The capability of adjustment of the input offset depends on the
selected gain of the first Programmable Gain Amplifier (PGA1) and on
the sensor output span.
(²): The reference voltages of the ADC, of the DAC and the supply
voltage of the sensors are ratio-metric.
(³): Full span is defined as the maximal sensor differential output voltage:
∆V(sensor output)_max , i.e the maximum voltage range allowed on the
MLX90129 sensor interface inputs SENS1, SENS2, SENS3 and SENS4.
3901090129
Rev 009
Page 7 of 60
Data Sheet
Jun/12