参数资料
型号: STM32F105VCT7TR
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 32-BIT, FLASH, 72 MHz, RISC MICROCONTROLLER, PQFP100
封装: 14 X 14 MM, ROHS COMPLIANT, LQFP-100
文件页数: 66/95页
文件大小: 1007K
代理商: STM32F105VCT7TR
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
s
3(4)
1/fADC
tlatr
(2)
Regular trigger conversion latency
fADC = 14 MHz
0.143
s
2(4)
1/fADC
tS
(2)
Sampling time
fADC = 14 MHz
0.107
17.1
s
1.5
239.5
1/fADC
tSTAB
(2)
Power-up time
0
1
s
tCONV
(2) Total conversion time (including
sampling time)
fADC = 14 MHz
1
18
s
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 (s)
RAIN max (k )
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
50
71.5
5.11
NA
239.5
17.1
NA
R
AIN
T
S
f
ADC
C
ADC
2
N2
+
ln
-------------------------------------------------------------
-
R
ADC
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