STM32L152C6 datasheet(102/131 Pages) STMICROELECTRONICS

102 / 131 page

Electrical characteristics

STM32L151x6/8/B, STM32L152x6/8/B

102/131

DocID17659 Rev 9

Figure 31. 12-bit buffered /non-buffered DAC

1. The DAC integrates an output buffer that can be used to reduce the output impedance and to drive external

loads directly without the use of an external operational amplifier. The buffer can be bypassed by

configuring the BOFFx bit in the DAC_CR register.

6.3.19

Temperature sensor characteristics

5. Difference between the value measured at Code (0x800) and the ideal value = VREF+/2.

6. Difference between the value measured at Code (0x001) and the ideal value.

Difference between ideal slope of the transfer function and measured slope computed from code 0x000 and

0xFFF when buffer is OFF, and from code giving 0.2 V and (VDDA – 0.2) V when buffer is ON.

8. In buffered mode, the output can overshoot above the final value for low input code (starting from min value).

R LOAD

C LOAD

Buffered/Non-buffered DAC

DAC_OUTx

Buffer(1)

12-bit

digital to

analog

converter

ai17157V2

Table 58. Temperature sensor calibration values

Calibration value name

Description

Memory address

TS_CAL1

TS ADC raw data acquired at

temperature of 30 °C,

VDDA= 3 V

0x1FF8 007A-0x1FF8 007B

TS_CAL2

TS ADC raw data acquired at

temperature of 110 °C

VDDA= 3 V

0x1FF8 007E-0x1FF8 007F

Table 59. Temperature sensor characteristics

Symbol

Parameter

Min

Typ

Max

Unit

TL(1)

1. Guaranteed by characterization, not tested in production.

VSENSE linearity with temperature

±1

±2°C

Avg_Slope(1)

Average slope

1.48

1.61

1.75

mV/°C

V110

Voltage at 110°C ±5°C(2)

2. Measured at VDD = 3 V ±10 mV. V110 ADC conversion result is stored in the TS_CAL2 byte.

612

626.8

641.5

IDDA(TEMP)(3)

Current consumption

3.4

µA

tSTART(3)

3. Guaranteed by design, not tested in production.

Startup time

µs

TS_temp(4)(3)

4. Shortest sampling time can be determined in the application by multiple iterations.

ADC sampling time when reading the

temperature

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