Temperature Sensor; Vref - Texas Instruments MSPM0G350 Series Manual

MSPM0G3507-Q1, MSPM0G3506-Q1, MSPM0G3505-Q1
SLASF88 – OCTOBER 2023
– Configurable internal reference voltage of 1.4V and 2.5V (requires decoupling capacitor on VREF+/- pins)
– MCU supply voltage (VDD)
– External reference supplied to the ADC through the VREF+/- pins
• Operates in RUN, SLEEP, and STOP modes
CHANNEL[0:7]
0
1
2
3
4
5
6
7
(1) Italicized signal names are purely internal to the SoC. These signals are used for internal peripheral interconnections.
(2) For more information about device analog connections please refer to
(3) Note that each channel 8 of each ADC can be sampled by the opposite ADC.
(4) When DAC_OUT is used, A1_0 cannot be used to sample external signals. Avoid using external circuitry on the PA15 pin when using
DAC_OUT.
For more details, see the ADC chapter of the
Manual.

8.13 Temperature Sensor

The temperature sensor provides a voltage output that changes linearly with device temperature. The
temperature sensor output is internally connected to one of ADC input channels to enable a temperature-to-
digital conversion.
A unit-specific single-point calibration value for the temperature sensor is provided in the factory constants
memory region. This calibration value represents the ADC conversion result (in ADC code format) corresponding
to the temperature sensor being measured in 12-bit mode with VDD = 3.3V at the factory trim temperature
(TS ). The ADC and VREF configuration for the above measurement is as the following: RES=0 (12-bit
TRIM
mode), VRSEL=0h (VDD), ADC t
temperature coefficient (TS
MSPM0 G-Series 80-MHz Microcontrollers Technical Reference Manual
temperature with the factory trim value.

8.14 VREF

The shared voltage reference module (VREF) in these devices contain a configurable voltage reference buffer
which allows users to supply a stable reference to on-board analog peripherals. It also supports bringing in an
external reference for applications where higher accuracy is required.
VREF features include:
• 1.4V and 2.5V user-selectable internal references
• Internal reference supports full speed ADC operation
• Support for bringing in an external reference on VREF+/- device pins
• Requires a decoupling capacitor placed on VREF+/- pins for proper operation. See
section for more details
For more details, see the VREF chapter of the
Manual.
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Table 8-7. ADC Channel Mapping
(2)
SIGNAL NAME
ADC0 ADC1
A0_0 A1_0 / DAC_OUT
A0_1 A1_1
A0_2 A1_2
A0_3 A1_3
A0_4 A1_4
A0_5 A1_5
A0_6 A1_6
A0_7 A1_7
MSPM0 G-Series 80-MHz Microcontrollers Technical Reference
=12.5µs. This calibration value can be used with the temperature sensor
Sample
) to estimate the device temperature. See the temperature sensor section of the
c
MSPM0 G-Series 80-MHz Microcontrollers Technical Reference
Product Folder Links: MSPM0G3507-Q1 MSPM0G3506-Q1 MSPM0G3505-Q1
CHANNEL[8:15]
(4)
8
9
10
11 Temperature Sensor
12
13
14
15
Section 8.30
for guidance on estimating the device
Copyright © 2023 Texas Instruments Incorporated
www.ti.com
(1) (2)
SIGNAL NAME
ADC0 ADC1
(3)
A1_7 A0_7
- -
- -
-
A0_12 Temperature Sensor
OPA0 output OPA1 output
GPAMP output GPAMP output
Supply/Battery Supply/Battery
Monitor Monitor
VREF specification
(3)