Datasheet

1142
SAM4S Series [DATASHEET]
11100F–ATARM–29-Jan-14
44.10 Analog Comparator Characteristics
44.11 Temperature Sensor
The temperature sensor is connected to channel 15 of the ADC.
The temperature sensor provides an output voltage (V
T
) that is proportional to absolute temperature (PTAT). The V
T
output voltage linearly varies with a temperature slope dV
T
/dT = 4.7 mV/°C.
The V
T
voltage equals 1.44V at 27°C, with a ±60 mV accuracy. The V
T
slope versus temperature dV
T
/dT = 4.7 mV/°C
only shows a ±7% slight variation over process, mismatch and supply voltage.
The user needs to calibrate it (offset calibration) at ambient temperature in order to get rid of the V
T
spread at ambient
temperature (±15%).
Note: 1. The value of TS only (the value does not take into account the ADC offset/gain/errors)
2. The temperature accuracy takes into account the ADC offset error and gain error in single-ended mode with Gain=1.
Table 44-58. Analog Comparator Characteristics
Parameter Conditions Min Typ Max Units
Voltage Range Analog comparator is supplied by VDDIN 1.62 3.3 3.6 V
Input Voltage Range GND + 0.2 — VDDIN - 0.2 V
Input Offset Voltage — — 20 mV
Current Consumption
On VDDIN
Low-Power Option (ISEL = 0)
High-Speed Option (ISEL = 1)
—— 25
170
µA
Hysteresis
HYST = 0x01 or 0x10
HYST = 0x11
—
15
30
50
90
mV
Settling Time
Given for overdrive > 100 mV
Low-power option
High-speed option
—— 1
0.1
µs
Table 44-59. Temperature Sensor Characteristics
Symbol Parameter Conditions Min Typ Max Units
V
T
Output Voltage T° = 27° C
(1)
1.44 — V
ΔV
T
Output Voltage Accuracy T° = 27° C
(1)
-60 — +60 mV
dV
T
/dT
Temperature Sensitivity (Slope
Voltage versus Temperature
(1)
—4.7—mV/°C
Slope Accuracy
Over temperature range [-40°C /
+105°C]
(1)
-7 — +7 %
Temperature Accuracy
(2)
After offset calibration
over temperature range [-40°C / +105°C]
-6 — +6 °C
After offset calibration
over temperature range [0°C / +80°C]
-5 — +5 °C
t
START-UP
Startup Time After TSON = 1
(1)
— 5 10 µs
I
VDDCORE
Current Consumption
(1)
50 70 80 µA