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参数资料
| 型号： | MCF52234CVM60 |
| 厂商： | FREESCALE SEMICONDUCTOR INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 32-BIT, FLASH, 60 MHz, RISC MICROCONTROLLER, PBGA121 |
| 封装： | 12 X 12 MM, 1 MM PITCH, PLASTIC, MAPBGA-121 |
| 文件页数： | 36/55页 |
| 文件大小： | 636K |
| 代理商： | MCF52234CVM60 |
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Electrical Characteristics
MCF52235 ColdFire Microcontroller Data Sheet, Rev. 10
Freescale Semiconductor
41
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 (VREFH-VREFL)/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 (VREFH-VREFL)/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, VREF, and the ADC clock frequency.
fADIC
ADC internal clock
0.1
—
5.0
MHz
RAD
Conversion range
VREFL
—VREFH
V
tADPU
ADC power-up time5
—6
13
tAIC cycles
6
tREC
Recovery from auto standby
—
0
1
tAIC cycles
tADC
Conversion time
—
6
—
tAIC cycles
tADS
Sample time
—
1
—
tAIC cycles
CADI
Input capacitance
—
See Figure 12
—pF
XIN
Input impedance
—
See Figure 12
—W
IADI
Input injection current7, per pin
—
3
mA
IVREFH
VREFH current
—
0
—
mA
VOFFSET
Offset voltage internal reference
—
11
15
mV
EGAIN
Gain error (transfer path)
.99
1
1.01
—
VOFFSET
Offset voltage external reference
—
3—
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 were made at V
DD = 3.3V, VREFH = 3.3V, and VREFL = ground
2 INL measured from V
IN = VREFL to VIN = VREFH
3 LSB = Least Significant Bit
4 INL measured from V
IN = 0.1VREFH to VIN = 0.9VREFH
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 35. ADC Parameters1 (continued)
Name
Characteristic
Min
Typical
Max
Unit
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MCF52234CVM60J | 功能描述:32位微控制器 - MCU MCU 32-Bit RoHS:否 制造商:Texas Instruments 核心:C28x 处理器系列:TMS320F28x 数据总线宽度:32 bit 最大时钟频率:90 MHz 程序存储器大小:64 KB 数据 RAM 大小:26 KB 片上 ADC:Yes 工作电源电压:2.97 V to 3.63 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:LQFP-80 安装风格:SMD/SMT |
| MCF52235 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:ColdFire Microcontroller |
| MCF52235_06 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:ColdFire㈢ Microcontroller |
| MCF52235_07 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:Microcontroller |
| MCF52235_10 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:MCF52235 ColdFire Microcontroller Data Sheet |
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