- 您现在的位置：买卖IC网 > PDF目录80545 > MCF52256CAG66 (FREESCALE SEMICONDUCTOR INC) 32-BIT, FLASH, 66 MHz, RISC MICROCONTROLLER, PQFP144 PDF资料下载
参数资料
| 型号： | MCF52256CAG66 |
| 厂商： | FREESCALE SEMICONDUCTOR INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 32-BIT, FLASH, 66 MHz, RISC MICROCONTROLLER, PQFP144 |
| 封装： | 20 X 20 MM, ROHS COMPLIANT, LQFP-144 |
| 文件页数： | 33/46页 |
| 文件大小： | 560K |
| 代理商： | MCF52256CAG66 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页当前第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页
MCF52259 ColdFire Microcontroller, Rev. 4
Electrical Characteristics
Freescale Semiconductor
39
2.16
Equivalent Circuit for ADC Inputs
Figure 14 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 & 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 on-going input current, which is a function
of the analog input voltage, VREF and the ADC clock frequency.
1. Parasitic capacitance due to package, pin-to-pin and pin-to-package base coupling; 1.8pF
2. Parasitic capacitance due to the chip bond pad, ESD protection devices and signal routing; 2.04pF
3. Equivalent resistance for the channel select mux; 100
s
4. Sampling capacitor at the sample and hold circuit. Capacitor C1 is normally disconnected from the input and is only
connected to it at sampling time; 1.4pF
5. Equivalent input impedance, when the input is selected =
Figure 14. Equivalent Circuit for A/D Loading
SNR
Signal-to-noise ratio
—
62 to 66
—
dB
THD
Total harmonic distortion
—
75
—
dB
SFDR
Spurious free dynamic range
—
67 to 70.3
—
dB
SINAD
Signal-to-noise plus distortion
—
61 to 63.9
—
dB
ENOB
Effective number of bits
9.1
10.6
—
Bits
1 All measurements are preliminary pending full characterization, and 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 Current that can be injected or sourced from an unselected ADC signal input without impacting the performance of the ADC
Table 25. ADC Parameters1 (continued)
Name
Characteristic
Min
Typical
Max
Unit
1
2
3
Analog Input
4
S1
S2
S3
C1
C2
S/H
C1 = C2 = 1pF
(VREFH- VREFL)/ 2
125W ESD Resistor
8pF noise damping capacitor
1
(ADC Clock Rate)
(1.410-12)
相关PDF资料 |
PDF描述 |
|---|---|
| MB96F353RWAPMC1-GSE2 | 16-BIT, FLASH, 56 MHz, MICROCONTROLLER, PQFP64 |
| MPC5607BMLL6R | FLASH, 64 MHz, MICROCONTROLLER, PQFP100 |
| MB95F314EPMC-G-SNE2 | 8-BIT, FLASH, 16.25 MHz, MICROCONTROLLER, PQFP80 |
| MSP430F6638IPZR | 16-BIT, FLASH, 20 MHz, RISC MICROCONTROLLER, PQFP100 |
| MSM6636RS | 1 CHANNEL(S), 41.6K bps, LOCAL AREA NETWORK CONTROLLER, PDIP18 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MCF52256CAG66 | 制造商:Freescale Semiconductor 功能描述:IC 32BIT MCU COLDFIRE/68K 66MHZ LQFP-144 |
| MCF52256CVN66 | 功能描述:32位微控制器 - MCU KIRN3 144MAPBGA 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 |
| MCF52256CVN66 | 制造商:Freescale Semiconductor 功能描述:32-bit Microcontroller IC |
| MCF52256CVN66J | 制造商:Freescale Semiconductor 功能描述:32-BIT MCF5225X COLDFIRE RISC 256KB FLASH 3.3V 144-PIN MA-B - Bulk |
| MCF52256VN80 | 制造商:Freescale Semiconductor 功能描述:MCU 32BIT V2 RISC 256KB FLASH 3.3V 144MAPBGA - Trays 制造商:Freescale Semiconductor 功能描述:MCU 32BIT COLDFIRE V2 144MAPBGA 制造商:Freescale Semiconductor 功能描述:32-bit Microcontroller IC 制造商:Freescale Semiconductor 功能描述:MCF5225X Series 32 Bit 80 Mhz Microcontroller - MAPBGA-144 |
发布紧急采购，3分钟左右您将得到回复。