STM32F107VB datasheet(69/95 Pages) STMICROELECTRONICS

Il numero della parte	STM32F107VB

Spiegazioni elettronici	Connectivity line, ARM-based 32-bit MCU with 64/256 KB Flash, USB OTG, Ethernet, 10 timers, 2 CANs, 2 ADCs, 14 communication interfaces

PDF	95 Pages

Scroll/Zoom	100%

Produttore elettronici	STMICROELECTRONICS [STMicroelectronics]

Homepage	http://www.st.com

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69 / 95 page

STM32F105xx, STM32F107xx

Electrical characteristics

Doc ID 15274 Rev 4

69/95

Equation 1: RAIN max formula

The formula above (Equation 1) is used to determine the maximum external impedance allowed for an

error below 1/4 of LSB. Here N = 12 (from 12-bit resolution).

tlat

(2)

Injection trigger conversion latency

fADC = 14 MHz

0.214

µs

3(4)

1/fADC

tlatr

(2)

Regular trigger conversion latency

fADC = 14 MHz

0.143

µs

2(4)

1/fADC

(2)

Sampling time

fADC = 14 MHz

0.107

17.1

µs

1.5

239.5

1/fADC

tSTAB

(2)

Power-up time

µs

tCONV

(2) Total conversion time (including

sampling time)

fADC = 14 MHz

µs

14 to 252 (tS for sampling +12.5 for

successive approximation)

1/fADC

1. Based on characterization, not tested in production.

2. Guaranteed by design, not tested in production.

3. VREF+ is internally connected to VDDA and VREF- is internally connected to VSSA.

4. For external triggers, a delay of 1/fPCLK2 must be added to the latency specified in Table 51.

Table 51.

ADC characteristics (continued)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Table 52.

RAIN max for fADC = 14 MHz

(1)

1. Based on characterization, not tested in production.

Ts (cycles)

tS (µs)

RAIN max (kY)

1.5

0.11

0.4

7.5

0.54

5.9

13.5

0.96

11.4

28.5

2.04

25.2

41.5

2.96

37.2

55.5

3.96

71.5

5.11

239.5

17.1

AIN

ADC

-------------------------------------------------------------

ADC

–

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