MSP430FR5729 Datasheet, PDF (34/115 Pages) Texas Instruments – MSP430FR572x Mixed-Signal Microcontrollers

MSP430FR5729, MSP430FR5728, MSP430FR5727, MSP430FR5726, MSP430FR5725
MSP430FR5724, MSP430FR5723, MSP430FR5722, MSP430FR5721, MSP430FR5720
SLASE35A – MAY 2014 – REVISED JUNE 2014
www.ti.com
5.33 REF, Temperature Sensor and Built-In V_MID
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
V_SENSOR
TC_SENSOR
t_{SENSOR(sample)}
PARAMETER
See ⁽¹⁾
Sample time required if
channel 10 is selected ⁽²⁾
TEST CONDITIONS
ADC10ON = 1, INCH = 0Ah,
T_A = 0°C
ADC10ON = 1, INCH = 0Ah
ADC10ON = 1, INCH = 0Ah,
Error of conversion result ≤ 1 LSB
V_CC
2 V, 3 V
2 V, 3 V
2V
3V
MIN TYP MAX UNIT
790
mV
2.55
30
30
mV/°C
µs
V_MID
AV_CC divider at channel 11
ADC10ON = 1, INCH = 0Bh,
V_MID is ~0.5 × V_AVCC
2V
0.97 1.0 1.03
V
3V
1.46 1.5 1.54
t_VMID(sample)
Sample time required if
channel 11 is selected ⁽³⁾
ADC10ON = 1, INCH = 0Bh,
Error of conversion result ≤ 1 LSB
2 V, 3 V 1000
ns
(1) The temperature sensor offset can vary significantly. A single-point calibration is recommended to minimize the offset error of the built-in
temperature sensor.
(2) The typical equivalent impedance of the sensor is 51 kΩ. The sample time required includes the sensor-on time t_SENSOR(on).
(3) The on-time t_VMID(on) is included in the sampling time t_VMID(sample); no additional on time is needed.
1050
1000
950
900
850
800
750
700
650
600
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80
Ambient Temperature - Degrees Celsius
Figure 5-11. Typical Temperature Sensor Voltage
34
Specifications
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