- 您现在的位置：买卖IC网 > PDF目录11206 > ADUC7025BCPZ32-RL (Analog Devices Inc)IC MCU 12BIT 1MSPS UART 64-LFCSP PDF资料下载
参数资料
| 型号： | ADUC7025BCPZ32-RL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 45/104页 |
| 文件大小： | 0K |
| 描述： | IC MCU 12BIT 1MSPS UART 64-LFCSP |
| 标准包装： | 2,500 |
| 系列： | MicroConverter® ADuC7xxx |
| 核心处理器： | ARM7 |
| 芯体尺寸： | 16/32-位 |
| 速度： | 44MHz |
| 连通性： | EBI/EMI，I²C，SPI，UART/USART |
| 外围设备： | PLA，PWM，PSM，温度传感器，WDT |
| 输入/输出数： | 30 |
| 程序存储器容量： | 32KB（16K x 16） |
| 程序存储器类型： | 闪存 |
| RAM 容量： | 1K x 32 |
| 电压 - 电源 (Vcc/Vdd)： | 2.7 V ~ 3.6 V |
| 数据转换器： | A/D 12x12b |
| 振荡器型： | 内部 |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 64-LFQFN 裸露焊盘，CSP |
| 包装： | 带卷 (TR) |
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页当前第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页第89页第90页第91页第92页第93页第94页第95页第96页第97页第98页第99页第100页第101页第102页第103页第104页
Data Sheet
ADuC7019/20/21/22/24/25/26/27/28/29
Rev. F | Page 45 of 104
ADC CIRCUIT OVERVIEW
The analog-to-digital converter (ADC) incorporates a fast,
multichannel, 12-bit ADC. It can operate from 2.7 V to 3.6 V
supplies and is capable of providing a throughput of up to
1 MSPS when the clock source is 41.78 MHz. This block
provides the user with a multichannel multiplexer, a differential
track-and-hold, an on-chip reference, and an ADC.
The ADC consists of a 12-bit successive approximation converter
based around two capacitor DACs. Depending on the input
signal configuration, the ADC can operate in one of three modes.
Fully differential mode, for small and balanced signals
Single-ended mode, for any single-ended signals
Pseudo differential mode, for any single-ended signals,
taking advantage of the common-mode rejection offered
by the pseudo differential input
The converter accepts an analog input range of 0 V to VREF when
operating in single-ended or pseudo differential mode. In fully
differential mode, the input signal must be balanced around a
common-mode voltage (VCM) in the 0 V to AVDD range with a
04
95
5-
0
11
AVDD
VCM
0
2VREF
Figure 48. Examples of Balanced Signals in Fully Differential Mode
A high precision, low drift, factory calibrated, 2.5 V reference is
provided on-chip. An external reference can also be connected as
described in the Band Gap Reference section.
Single or continuous conversion modes can be initiated in the
software. An external CONVSTART pin, an output generated from
the on-chip PLA, or a Timer0 or Timer1 overflow can also be
used to generate a repetitive trigger for ADC conversions.
A voltage output from an on-chip band gap reference propor-
tional to absolute temperature can also be routed through the
front-end ADC multiplexer, effectively an additional ADC channel
input. This facilitates an internal temperature sensor channel
that measures die temperature to an accuracy of 3°C.
TRANSFER FUNCTION
Pseudo Differential and Single-Ended Modes
In pseudo differential or single-ended mode, the input range
is 0 V to VREF. The output coding is straight binary in pseudo
differential and single-ended modes with
1 LSB = FS/4096, or
2.5 V/4096 = 0.61 mV, or
610 μV when VREF = 2.5 V
The ideal code transitions occur midway between successive
integer LSB values (that is, 1/2 LSB, 3/2 LSB, 5/2 LSB, … ,
FS 3/2 LSB). The ideal input/output transfer characteristic
is shown in Figure 49.
04
95
5-
0
12
O
UT
P
UT
CO
DE
VOLTAGE INPUT
1111 1111 1111
1111 1111 1110
1111 1111 1101
1111 1111 1100
0000 0000 0011
1LSB
0V
+FS – 1LSB
0000 0000 0010
0000 0000 0001
0000 0000 0000
1LSB =
FS
4096
Figure 49. ADC Transfer Function in Pseudo Differential or Single-Ended Mode
Fully Differential Mode
The amplitude of the differential signal is the difference between
the signals applied to the VIN+ and VIN– input voltage pins (that
is, VIN+ VIN–). The maximum amplitude of the differential
signal is, therefore, –VREF to +VREF p-p (that is, 2 × VREF). This is
regardless of the common mode (CM). The common mode is
the average of the two signals, for example, (VIN+ + VIN–)/2, and
is, therefore, the voltage that the two inputs are centered on.
This results in the span of each input being CM VREF/2. This
voltage has to be set up externally, and its range varies with VREF
(see the Driving the Analog Inputs section).
The output coding is twos complement in fully differential mode
with 1 LSB = 2 VREF/4096 or 2 × 2.5 V/4096 = 1.22 mV when
VREF = 2.5 V. The output result is ±11 bits, but this is shifted by 1
to the right. This allows the result in ADCDAT to be declared as a
signed integer when writing C code. The designed code
transitions occur midway between successive integer LSB values
(that is, 1/2 LSB, 3/2 LSB, 5/2 LSB, … , FS 3/2 LSB). The ideal
input/output transfer characteristic is shown in Figure 50.
04
95
5-
0
13
O
U
T
P
UT
CO
DE
VOLTAGE INPUT (VIN+ – VIN–)
0 1111 1111 1110
0 1111 1111 1100
0 1111 1111 1010
0 0000 0000 0010
0 0000 0000 0000
1 1111 1111 1110
1 0000 0000 0100
1 0000 0000 0010
1 0000 0000 0000
–VREF + 1LSB
+VREF – 1LSB
0LSB
1LSB =
2 × VREF
4096
SIGN
BIT
Figure 50. ADC Transfer Function in Differential Mode
相关PDF资料 |
PDF描述 |
|---|---|
| ADUC7021BCPZ32-RL7 | IC MCU FLASH 32K W/ANLG 40LFCSP |
| AT90CAN128-16AUR | IC MCU AVR 128K FLASH 64TQFP |
| AT90CAN128-16MUR | IC MCU AVR 128K FLASH 64QFN |
| AD8117ABPZ | IC CROSSPOINT SWIT 32X32 304BGA |
| ATMEGA644P-B15AZ | IC MCU 8BIT 64KB FLASH 44TQFP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ADUC7025BCPZ32-RL7 | 制造商:Analog Devices 功能描述:MCU 16-bit/32-bit ADuC7xxx ARM7TDMI RISC 32KB Flash 3.3V 64-Pin LFCSP EP T/R |
| ADUC7025BCPZ62 | 功能描述:IC MCU FLSH 62K ANLG I/O 64LFCSP RoHS:是 类别:集成电路 (IC) >> 嵌入式 - 微控制器， 系列:MicroConverter® ADuC7xxx 标准包装:38 系列:Encore!® XP® 核心处理器:eZ8 芯体尺寸:8-位 速度:5MHz 连通性:IrDA，UART/USART 外围设备:欠压检测/复位，LED，POR，PWM，WDT 输入/输出数:16 程序存储器容量:4KB（4K x 8） 程序存储器类型:闪存 EEPROM 大小:- RAM 容量:1K x 8 电压 - 电源 (Vcc/Vdd):2.7 V ~ 3.6 V 数据转换器:- 振荡器型:内部 工作温度:-40°C ~ 105°C 封装/外壳:20-SOIC（0.295"，7.50mm 宽） 包装:管件 其它名称:269-4116Z8F0413SH005EG-ND |
| ADUC7025BCPZ62-RL | 功能描述:IC MCU 12BIT 1MSPS UART 64-LFCSP RoHS:是 类别:集成电路 (IC) >> 嵌入式 - 微控制器， 系列:MicroConverter® ADuC7xxx 标准包装:38 系列:Encore!® XP® 核心处理器:eZ8 芯体尺寸:8-位 速度:5MHz 连通性:IrDA，UART/USART 外围设备:欠压检测/复位，LED，POR，PWM，WDT 输入/输出数:16 程序存储器容量:4KB（4K x 8） 程序存储器类型:闪存 EEPROM 大小:- RAM 容量:1K x 8 电压 - 电源 (Vcc/Vdd):2.7 V ~ 3.6 V 数据转换器:- 振荡器型:内部 工作温度:-40°C ~ 105°C 封装/外壳:20-SOIC（0.295"，7.50mm 宽） 包装:管件 其它名称:269-4116Z8F0413SH005EG-ND |
| ADUC7025BCPZ62-RL7 | 制造商:AD 制造商全称:Analog Devices 功能描述:Precision Analog Microcontroller 12-bit Analog I/O, ARM7TDMI MCU |
| ADUC7025BSTZ62 | 功能描述:IC MCU FLASH 62K ANLG I/O 64LQFP RoHS:是 类别:集成电路 (IC) >> 嵌入式 - 微控制器， 系列:MicroConverter® ADuC7xxx 标准包装:250 系列:LPC11Uxx 核心处理器:ARM? Cortex?-M0 芯体尺寸:32-位 速度:50MHz 连通性:I²C，Microwire，SPI，SSI，SSP，UART/USART，USB 外围设备:欠压检测/复位，POR，WDT 输入/输出数:40 程序存储器容量:96KB（96K x 8） 程序存储器类型:闪存 EEPROM 大小:4K x 8 RAM 容量:10K x 8 电压 - 电源 (Vcc/Vdd):1.8 V ~ 3.6 V 数据转换器:A/D 8x10b 振荡器型:内部 工作温度:-40°C ~ 85°C 封装/外壳:48-LQFP 包装:托盘 其它名称:568-9587 |
发布紧急采购，3分钟左右您将得到回复。