- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄17110 > EVAL-ADUC812QSZ (Analog Devices Inc)BOARD EVALUATION FOR ADUC812 PDF資料下載
參數(shù)資料
| 型號： | EVAL-ADUC812QSZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 4/57頁 |
| 文件大?。?/td> | 0K |
| 描述： | BOARD EVALUATION FOR ADUC812 |
| 產(chǎn)品培訓(xùn)模塊： | Process Control |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | QuickStart™ 套件 |
| 類型： | MCU |
| 適用于相關(guān)產(chǎn)品： | ADuC812 |
| 所含物品： | 評估板、電源、纜線、軟件和說明文檔 |
第1頁第2頁第3頁當(dāng)前第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁
REV.
ADuC812
–12–
ADC CIRCUIT INFORMATION
General Overview
The ADC conversion block incorporates a fast, 8-channel,
12-bit, single-supply ADC. This block provides the user with
multichannel mux, track-and-hold, on-chip reference, calibra-
tion features, and ADC. All components in this block are easily
configured via a 3-register SFR interface.
The ADC consists of a conventional successive-approximation
converter based around a capacitor DAC. The converter accepts
an analog input range of 0 V to VREF. A high precision, low drift
and factory calibrated 2.5 V reference is provided on-chip. The
internal reference may be overdriven via the external VREF pin.
This external reference can be in the range 2.3 V to AVDD.
Single step or continuous conversion modes can be initiated in
software or alternatively by applying a convert signal to an external
pin. Timer 2 can also be configured to generate a repetitive trigger
for ADC conversions. The ADC may be configured to operate
in a DMA mode whereby the ADC block continuously converts
and captures samples to an external RAM space without any
interaction from the MCU core. This automatic capture facility
can extend through a 16 MByte external Data Memory space.
The ADuC812 is shipped with factory programmed calibration
coefficients that are automatically downloaded to the ADC on
power-up, ensuring optimum ADC performance. The ADC
core contains internal offset and gain calibration registers.
A software calibration routine is provided to allow the user to
overwrite the factory programmed calibration coefficients if
required, thus minimizing the impact of endpoint errors in the
user’s target system.
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 a ninth ADC channel
input) facilitating a temperature sensor implementation.
ADC Transfer Function
The analog input range for the ADC is 0 V to VREF. For this
range, the designed code transitions occur midway between
successive integer LSB values (i.e., 1/2 LSB, 3/2 LSBs,
5/2 LSBs . . . FS –3/2 LSBs). The output coding is straight
binary with 1 LSB = FS/4096 or 2.5 V/4096 = 0.61 mV when
VREF = 2.5 V. The ideal input/output transfer characteristic for
the 0 to VREF range is shown in Figure 5.
OUTPUT
CODE
111...111
111...110
111...101
111...100
000...011
000...010
000...001
000...000
0V 1LSB
+FS
–1LSB
VOLTAGE INPUT
1LSB =
FS
4096
Figure 5. ADC Transfer Function
Typical Operation
Once configured via the ADCCON 1–3 SFRs (shown on the
following page), the ADC will convert the analog input and
provide an ADC 12-bit result word in the ADCDATAH/L SFRs.
The top four bits of the ADCDATAH SFR will be written
with the channel selection bits to identify the channel result.
The format of the ADC 12-bit result word is shown in Figure 6.
CH–ID
TOP 4 BITS
HIGH 4 BITS OF
ADC RESULT WORD
LOW 8 BITS OF THE
ADC RESULT WORD
ADCDATAH SFR
ADCDATAL SFR
Figure 6. ADC Result Format
F
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ECM30DCWD | CONN EDGECARD 60POS DIP .156 SLD |
| ADR03WARZ-R7 | IC VREF SERIES PREC 2.5V 8SOIC |
| SC43B-1R4 | INDUCTOR SMD 1.4UH 2.20A 7.96MHZ |
| REC5-2415SRWZ/H4/C | CONV DC/DC 5W 9-36VIN 15VOUT |
| VI-J4F-EZ | CONVERTER MOD DC/DC 72V 25W |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| EVAL-ADUC814MK | 制造商:Analog Devices 功能描述:Evaluation Board For Micro-Converter, Small Packag 12-Bit ADC With Embedded Flash MCU 制造商:Analog Devices 功能描述:MICROCONVEMICROCNVRTR, SMALL PACKAG 12-BIT ADC W/ EMBEDDED F - Bulk 制造商:Analog Devices 功能描述:Microcontroller Development Tool |
| EVAL-ADUC814QS | 制造商:Analog Devices 功能描述:8052 ADUC814 QUICKSTART DEV KIT |
| EVAL-ADUC814QS-U | 制造商:Analog Devices 功能描述:QUICK START DEVL SYST EVAL BOARD I.C. - Bulk |
| EVAL-ADUC814QSZ | 功能描述:KIT DEV FOR ADUC814 MICROCONVRTR RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 通用嵌入式開發(fā)板和套件（MCU、DSP、FPGA、CPLD等） 系列:QuickStart™ 套件 標(biāo)準(zhǔn)包裝:1 系列:PICDEM™ 類型:MCU 適用于相關(guān)產(chǎn)品:PIC10F206，PIC16F690，PIC16F819 所含物品:板，線纜，元件，CD，PICkit 編程器 產(chǎn)品目錄頁面:659 (CN2011-ZH PDF) |
| EVAL-ADUC814QSZ | 制造商:Analog Devices 功能描述:EVAL BOARD, ADUC814 8052 CORE ANALOG MCU |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。