STM32L151X8 datasheet(97/133 Pages) STMICROELECTRONICS

Part #	STM32L151x8

Description	Ultra-low-power 32-bit MCU ARM®-based Cortex®-M3, 128KB Flash, 16KB SRAM, 4KB EEPROM, LCD, USB, ADC, DAC

PDF	133 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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97 / 133 page

DocID17659 Rev 12

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STM32L151x6/8/B STM32L152x6/8/B

Electrical characteristics

104

Figure 28. Maximum dynamic current consumption on VREF+ supply pin during ADC

conversion

General PCB design guidelines

Power supply decoupling should be performed as shown in The 10 nF capacitors should be

ceramic (good quality). They should be placed as close as possible to the chip.

ADC clock

Sampling (n cycles)

Conversion (12 cycles)

Iref+

300µA

700µA

MS36686V1

Table 56. Maximum source impedance RAIN max(1)

(µs)

RAIN max (kOhm)

Ts (cycles)

fADC= 16 MHz(2)

Multiplexed channels

Direct channels

2.4 V < VDDA< 3.6 V 1.8 V < VDDA < 2.4 V 2.4 V < VDDA< 3.3 V 1.8 V < VDDA < 2.4 V

0.25

Not allowed

0.7

Not allowed

0.5625

0.8

Not allowed

2.0

1.0

2.0

0.8

4.0

3.0

1.5

3.0

1.8

6.0

4.5

6.8

4.0

15.0

10.0

15.0

10.0

30.0

20.0

32.0

25.0

50.0

40.0

192

50.0

384

1. Guaranteed by design.

2. Number of samples calculated for fADC = 16 MHz. For fADC = 8 and 4 MHz the number of sampling cycles can be

reduced with respect to the minimum sampling time Ts (us).

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