參數(shù)資料
型號(hào)： ADUC7129BSTZ126
廠(chǎng)商： Analog Devices Inc
文件頁(yè)數(shù)： 26/92頁(yè)
文件大?。?/td> 0K
描述： IC DAS MCU ARM7 ADC/DDS 80-LQFP
產(chǎn)品培訓(xùn)模塊： Direct Digital Synthesis Tutorial Series (1 of 7): Introduction
標(biāo)準(zhǔn)包裝： 1
系列： MicroConverter® ADuC7xxx
核心處理器： ARM7
芯體尺寸： 16/32-位
速度： 41.78MHz
連通性： EBI/EMI，I²C，SPI，UART/USART
外圍設(shè)備： PLA，POR，PWM，PSM，溫度傳感器，WDT
輸入/輸出數(shù)： 38
程序存儲(chǔ)器容量： 126KB（63K x 16）
程序存儲(chǔ)器類(lèi)型： 閃存
RAM 容量： 8K x 8
電壓 - 電源 (Vcc/Vdd)： 3 V ~ 3.6 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 10x12b; D/A 1x10b
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 125°C
封裝/外殼： 80-LQFP
包裝： 托盤(pán)
ADuC7128/ADuC7129
Rev. 0 | Page 32 of 92
ADC CIRCUIT OVERVIEW
The analog-to-digital converter (ADC) incorporates a fast,
multichannel, 12-bit ADC. It can operate from 3.0 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, differential track-and-
hold, on-chip reference, and 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 the
following 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 to VREF when
operating in single-ended mode or pseudo differential mode. In
fully differential mode, the input signal must be balanced around
a common-mode voltage VCM, in the range 0 V to AVDD and
with a maximum amplitude of 2 VREF (see Figure 32).
AVDD
VCM
0
2VREF
0
60
20
-02
8
Figure 32. Examples of Balanced Signals for Fully Differential Mode
A high precision, low drift, and 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 software.
An external CONVST pin, an output generated from the on-chip
PLA, a Timer0, or a Timer1 overflow can also be used to
generate a repetitive trigger for ADC conversions.
If the signal has not been deasserted by the time the ADC
conversion is complete, a second conversion begins auto-
matically.
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, measuring die temperature to an accuracy of ±3°C.
ADC TRANSFER FUNCTION
Pseudo Differential Mode and Single-Ended Mode
In pseudo differential or single-ended mode, the input range is
0 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 LSBs, 5/2 LSBs, …,
FS – 3/2 LSBs). The ideal input/output transfer characteristic is
shown in Figure 33.
O
U
T
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
06
02
0-
0
29
Figure 33. ADC Transfer Function in Pseudo Differential Mode 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 pins (that is,
VIN+ VIN). The maximum amplitude of the differential signal
is, therefore, VREF to +VREF p-p (2 × VREF). This is regardless of
the common mode (CM). The common mode is the average of
the two signals (VIN+ + VIN)/2, and is, therefore, the voltage upon
which the two inputs are centered. This results in the span of
each input being CM ± VREF/2. This voltage has to be set up exter-
nally, 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 one 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 LSBs, 5/2 LSBs, …,
FS 3/2 LSBs). The ideal input/output transfer characteristic is
shown in Figure 34.
相關(guān)PDF資料
PDF描述
ADUC812BSZ-REEL IC MCU FLASH 12BIT ADC 52MQFP
ADUC814BRU IC ADC 12BIT W/FLASH MCU 28TSSOP
ADUC816BCP IC MCU 8K FLASH ADC/DAC 56LFCSP
ADUC824BSZ-REEL IC MCU 8K FLASH ADC/DAC 52MQFP
ADUC831BCPZ IC MCU 62K FLASH ADC/DAC 56LFCSP
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ADUC7129BSTZ1262 制造商:AD 制造商全稱(chēng):Analog Devices 功能描述:Precision Analog Microcontroller ARM7TDMI MCU with 12-Bit ADC and DDS DAC
ADUC7129BSTZ126-RL 功能描述:IC DAS MCU ARM7 ADC/DDS 80-LQFP RoHS:是 類(lèi)別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:MicroConverter® ADuC7xxx 產(chǎn)品培訓(xùn)模塊:Graphics LCD System and PIC24 Interface Asynchronous Stimulus 標(biāo)準(zhǔn)包裝:27 系列:PIC® 24H 核心處理器:PIC 芯體尺寸:16-位 速度:40 MIP 連通性:I²C，SPI，UART/USART 外圍設(shè)備:欠壓檢測(cè)/復(fù)位，POR，PWM，WDT 輸入/輸出數(shù):21 程序存儲(chǔ)器容量:12KB（4K x 24） 程序存儲(chǔ)器類(lèi)型:閃存 EEPROM 大小:- RAM 容量:1K x 8 電壓 - 電源 (Vcc/Vdd):3 V ~ 3.6 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 10x10b/12b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 包裝:管件 產(chǎn)品目錄頁(yè)面:648 (CN2011-ZH PDF) 配用:AC164339-ND - MODULE SKT FOR PM3 28SOICDV164033-ND - KIT START EXPLORER 16 MPLAB ICD2
ADUC7129BSTZ126-RL2 制造商:AD 制造商全稱(chēng):Analog Devices 功能描述:Precision Analog Microcontroller ARM7TDMI MCU with 12-Bit ADC and DDS DAC
aduc7229bcpz126 制造商:Analog Devices 功能描述:
ADUC7229BCPZ126-RL 制造商:Analog Devices 功能描述:
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠(chǎng)商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*