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-40 -30 -20 -10 0 10 20 30 40 50 60 70 80
Ambient Temperature (°C)
Typical Temperate Sensor Voltage (V)
MSP432P401R, MSP432P401M
www.ti.com SLAS826 –MARCH 2015
Table 5-40. 14-Bit ADC, Temperature Sensor and Built-In V
1/2
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX UNIT
ADC14ON = 1, ADC14TCMAP = 1,
V
SENSOR
See
(1) (2)
730 mV
T
A
= 0°C
TC
SENSOR
See
(2)
ADC14ON = 1, ADC14TCMAP = 1 1.9 mV/°C
Sample time required if
t
SENSOR(sa
ADC14ON = 1, ADC14TCMAP = 1,
ADCTCMAP = 1 and channel 5 µs
mple)
Error of conversion result ≤ 1 LSB
MAX-1 is selected
(3)
AVCC voltage divider for
V
1/2
ADC14BATMAP = 1 on MAX ADC14ON = 1, ADC14BATMAP = 1 48% 50% 52%
input channel
Sample time required if
t
V 1/2
ADC14BATMAP = 1 and channel ADC14ON = 1, ADC14BMAP = 1 1 µs
(sample)
MAX is selected
(4)
(1) The temperature sensor offset can be as much as ±20°C. TI recommends a single-point calibration to minimize the offset error of the
built-in temperature sensor.
(2) The TLV structure contains calibration values for 30°C ± 3°C and 85°C ± 3°C for each of the available reference voltage levels. The
sensor voltage can be computed as V
SENSE
= TC
SENSOR
× (Temperature,°C) + V
SENSOR
, where TC
SENSOR
and V
SENSOR
can be
computed from the calibration values for higher accuracy.
(3) The typical equivalent impedance of the sensor is 250 kΩ. The sample time required includes the sensor-on time t
SENSOR(on)
.
(4) The on-time t
V1/2(on)
is included in the sampling time t
V 1/2 (sample)
. No additional on time is needed.
Figure 5-2. Typical Temperature Sensor Voltage
Table 5-41. 14-Bit ADC, Internal Reference Buffers
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX UNIT
ADC ON, REFOUT = 0, ADC14PWRMD =
3 V 600 1000
0, REFVSEL = {0, 1, 3}
Operating supply current into ADC ON, REFOUT = 0, ADC14PWRMD =
I
REF+
3 V 200 360 µA
AVCC terminal
(1)
2, REFVSEL = {0, 1, 3}
ADC ON, REFOUT = 1, ADC14PWRMD =
3 V 560 870
2, REFVSEL = {0, 1, 3}
t
on
Time to turn on 3V 5 µs
(1) The internal reference current is supplied via terminal AV
CC
.
Copyright © 2015, Texas Instruments Incorporated Specifications 47
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