STLM20 Grade 9(STLM20DD9F)

STLM20 Grade 9(STLM20DD9F) is a temperatures sensor IC (-40 °C to +85 °C) made by Texas Instruments. This posting will provide the OSS-ECAL(Open Source Software for Electronic Components Abstraction Layer) for STLM20 Grade 9.
MCU interface : ADC

For Datasheet, please search by model number from here as instructed by STMicroelectronics.

CAUTION:Please be sure to refer to the latest version of the Datasheet prior to actual design.

STLM20 Grade 9(STLM20DD9F)

General description

The STLM20 is a precision analog output temperature sensor for low current applications where maximizing battery life is important. It operates over a –55 °C to 130 °C (grade 7) or –40 °C to 85 °C (grade 9) temperature range. The power supply operating range is 2.4 V to 5.5 V. The maximum temperature accuracy of the STLM20 is ± 1.5 °C (±0.5 °C typ) at an ambient temperature of 25 °C and VCC of 2.7 V. The temperature error increases linearly and reaches a maximum of ±2.5 °C at the temperature range extremes. The temperature range is affected by the power supply voltage. For the temperature grade 7 device, a power supply voltage of 2.7 V to 5.5 V, the temperature range extremes are +130 °C and –55 °C (decreasing the power supply voltage from 2.7 V to 2.4 V changes the low end of the operating temperature range from –55 °C to –30 °C, while the positive remains at +130 °C).
The STLM20 has a maximum quiescent supply current of 8 µA. Therefore, self-heating is negligible.

Feature
  • Precision analog voltage output temperature sensor
  • ±1.5 °C maximum temperature accuracy at 25 °C (±0.5 °C typical)
  • Ultra-low quiescent supply current:4.8 µA (typ) and 8.0 µA (max)
  • Operating voltage range: 2.4 V to 5.5 V
  • Operating temperature range:
    -55 °C to 130 °C (grade 7)
    -40 °C to 85 °C (grade 9)
  • SOT323-5L 5-lead package
  • UDFN-4L 4-lead package
Application
  • Smartphones
  • Multimedia PDA devices
  • GPS devices
  • Portable medical instruments
  • Voltage-controlled crystal oscillator temperature monitors
  • RF power transistor monitor

OSS-ECAL specification

API Function

etSTS oSTLM20DD9F( etCMD cmd, float32* rlt )

Return value
Parameter IN
Parameter OUT

etSTS
etCMD cmd
float32* rlt

OSS-ECAL status code
OSS-ECAL command code
Temperature -40 to 85 [°C]

etCMD
eCMD_START


Feature :
Command to start AD conversion.

Process :
1. AD conversion start.

Command API function :
etSTS oSTLM20DD9F_START( void )

Return value :
eSTS_FIN
eSTS_ERR_HAL_ADC
eSTS_ERR_COMMAND_CODE
eSTS_ERR_OTHERS_RUN
eSTS_ERR_ADC_OBJECT

NOTE :
Arduino, Mbeb, ModusToolbox not supported.

eCMD_READ

Feature :
Command that reads the AD conversion value, converts the AD conversion value to a characteristic Temperature, and stores the Temperature in rlt.

Process :
1. Read AD conversion value.
2. Convert AD conversion value to Temperature.
Voltage value = (AD conversion value × VDD) / ( 2AD bit )
Temperature = ((voltage value – voltage offset value) / gain) + Temperature offset value (Min, Max Limit)
3. Store Temperature to rlt.

Command API function :
etSTS oSTLM20DD9F_READ( float32* rlt )

Return value :
eSTS_FIN
eSTS_ERR_MIN
eSTS_ERR_MAX
eSTS_ERR_HAL_ADC
eSTS_ERR_COMMAND_CODE
eSTS_ERR_OTHERS_RUN
eSTS_ERR_ADC_OBJECT

NOTE :
Please execute this API function after starting AD conversion.
Arduino, Mbeb, ModusToolbox not supported.

eCMD_START_READ

Feature :
Command that starts AD conversion, waits for AD conversion to finish, reads out the AD conversion value, converts the AD conversion value to a characteristic Temperature, and stores the Temperature in rlt.

Process :
1. AD conversion start.
2. Wait until AD conversion is completed.
3. Read AD conversion value.
4. Convert AD conversion value to Temperature.
Voltage value = (AD conversion value × VDD) / ( 2AD bit )
Temperature = ((voltage value – voltage offset value) / gain) + Temperature offset value (Min, Max Limit)
5. Store Temperature to rlt.

Command API function :
etSTS oSTLM20DD9F_START_READ( float32* rlt )

Return value :
eSTS_FIN
eSTS_ERR_MIN
eSTS_ERR_MAX
eSTS_ERR_HAL_ADC
eSTS_ERR_COMMAND_CODE
eSTS_ERR_OTHERS_RUN
eSTS_ERR_ADC_OBJECT

NOTE :

Files
Folder*Filesummary
STLM20DD9F_HALNAME/samplesample.c (.cpp)Sample Application Program
sample.hSample Application Header
STLM20DD9F_HALNAMEoSTLM20DD9F.c (.cpp)OSS-ECAL Program for STLM20DD9F
oSTLM20DD9F.hOSS-ECAL Header for STLM20DD9F
oss_ecal.hOSS-ECAL Common Header (Ver 01.00.00 or later)
user_setting.c (.cpp)Const and Table of User setting
user_setting.hHeader of User setting
readme.mdReadme
OSS-ECAL Terms of Use.txtOSS-ECAL Terms of Use

* For HALNAME, please refer to HAL Support.

HAL Support List
MCU/Board
manufacturer
HALMCU*Development environment*HALNAME
ArduinoArduino 1.8.6ATmega2560
ATmega328P
Mega 2560 Rev3
Arduino Pro Mini 3.3V
ARDUINO
ARMMbed 6.17.0STM32F401RETxSTM32 Nucleo-64 boardsMBED
InfineonModusToolbox HAL Cat1 2.4.3CYBLE-416045-02CY8CPROTO-063-BLE PSoC 6 BLE Prototyping KitModusToolbox
NXPMCUXpresso SDK
iMXRT1051B_1052B
ksdk2_0
CYBLE-416045-02IMXRT1050-EVKBiMXRT1051B1052B
RenesasSSP 2.4.0R7FS7G27H3A01CFCS7G2 SKSSP
STMSTM32Cube FW_F4 V1.27.1STM32F401RETxSTM32 Nucleo-64 boardsSTM32F4

* MCU and development environment at the time of development. Even if the same HAL is used, different MCUs and development environments may not work together.

Download

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If you are unable to download the File, please contact us and let us know the model number and HAL type. We will send you the file as an email attachment.

Built-in How to

How to incorporate OSS-ECAL into user programs

How to incorporate multiple OSS-ECALs in a user program (same MCU function)

How to incorporate multiple OSS-ECALs in a user program (different MCU function)

How to incorporate multiple identical electronic components into a user program

How to reduce the impact on user programs by replacing electronic components

OSS-ECAL English
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