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參數(shù)資料
| 型號： | MCF52235 |
| 廠商： | 飛思卡爾半導(dǎo)體(中國)有限公司 |
| 英文描述： | ColdFire Microcontroller |
| 中文描述： | ColdFire微控制器 |
| 文件頁數(shù)： | 39/50頁 |
| 文件大?。?/td> | 656K |
| 代理商： | MCF52235 |
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Preliminary Electrical Characteristics
MCF52235 ColdFire Microcontroller, Rev. 3
Freescale Semiconductor
39
2.9.1
Equivalent Circuit for ADC Inputs
Figure 10-17 shows the ADC input circuit during sample and hold. S1 and S2 are always open/closed at the same time that S3
is closed/open. When S1/S2 are closed and S3 is open, one input of the sample and hold circuit moves to (V
REFH
-V
REFL
)/2,
while the other charges to the analog input voltage. When the switches are flipped, the charge on C1 and C2 are averaged via
S3, with the result that a single-ended analog input is switched to a differential voltage centered about (V
REFH
-V
REFL
)/2. The
switches switch on every cycle of the ADC clock (open one-half ADC clock, closed one-half ADC clock). There are additional
capacitances associated with the analog input pad, routing, etc., but these do not filter into the S/H output voltage, as S1 provides
isolation during the charge-sharing phase. One aspect of this circuit is that there is an ongoing input current, which is a function
of the analog input voltage, V
REF
,
and the ADC clock frequency.
I
ADI
Input injection current
7
, per pin
—
—
3
mA
I
VREFH
V
REFH
current
—
0
—
m
V
OFFSET
Offset voltage internal reference
—
±
11
±
15
mV
E
GAIN
Gain error (transfer path)
.99
1
1.01
—
V
OFFSET
Offset voltage external reference
—
±
3
TBD
mV
SNR
Signal-to-noise ratio
—
62 to 66
—
dB
THD
Total harmonic distortion
—
–75
—
dB
SFDR
Spurious free dynamic range
—
75
—
dB
SINAD
Signal-to-noise plus distortion
—
65
—
dB
ENOB
Effective number OF bits
9.1
10.6
—
Bits
1
All measurements are preliminary pending full characterization, and were made at V
DD
= 3.3V, V
REFH
= 3.3V, and V
REFL
=
ground
2
INL measured from V
IN
= V
REFL
to V
IN
= V
REFH
3
LSB = Least Significant Bit
4
INL measured from V
IN
= 0.1V
REFH
to V
IN
= 0.9V
REFH
5
Includes power-up of ADC and V
REF
6
ADC clock cycles
7
The current that can be injected or sourced from an unselected ADC signal input without impacting the performance of the
ADC
Table 31. ADC Parameters
1
(continued)
Name
Characteristic
Min
Typical
Max
Unit
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MCF5232CAB80 | Integrated Microprocessor Hardware Specification |
| MCF5232 | Integrated Microprocessor Hardware Specification |
| MCF5249 | CodeWarrior Development Studio for ColdFire㈢ Architectures |
| MCF5251_07 | ColdFire㈢ Microprocessor Data Sheet |
| MCF5251 | ColdFire Processor |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MCF52235_06 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:ColdFire㈢ Microcontroller |
| MCF52235_07 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Microcontroller |
| MCF52235_10 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:MCF52235 ColdFire Microcontroller Data Sheet |
| MCF52235CAL60 | 功能描述:32位微控制器 - MCU KIRIN2E EPP RoHS:否 制造商:Texas Instruments 核心:C28x 處理器系列:TMS320F28x 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:90 MHz 程序存儲器大小:64 KB 數(shù)據(jù) RAM 大小:26 KB 片上 ADC:Yes 工作電源電壓:2.97 V to 3.63 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:LQFP-80 安裝風(fēng)格:SMD/SMT |
| MCF52235CAL60A | 制造商:Freescale Semiconductor 功能描述:KIRIN2E EPP - REV A - Bulk |
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