- 您現在的位置：買賣IC網 > PDF目錄373913 > AD7703AN (ANALOG DEVICES INC) LC2MOS 20-Bit A/D Converter PDF資料下載
參數資料
| 型號： | AD7703AN |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | ADC |
| 英文描述： | LC2MOS 20-Bit A/D Converter |
| 中文描述： | 1-CH 20-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDIP20 |
| 封裝： | PLASTIC, MO-095-AE, DIP-20 |
| 文件頁數： | 15/16頁 |
| 文件大小： | 251K |
| 代理商： | AD7703AN |
AD7703
REV. D
–15–
SY NCHRONOUS E X T E RNAL CLOCK MODE (SE C)
T he SEC mode (MODE pin grounded) is designed for direct
interface to the synchronous serial ports of industry standard
microprocessors such as the 68HC11 and 68HC05. T he SEC
mode also allows customized interfaces, using I/O port pins, to
microprocessors that do not have a direct fit with the AD7703’s
other mode.
As shown in Figure 17, a falling edge on
CS
enables the serial
data output with the MSB initially valid. Subsequent data bits
change on the falling edge of an externally supplied SCLK .
After the LSB has been transmitted,
DRDY
and SDAT A go
three-state. If
CS
is low and the AD7703 is still transmitting
data when a new data word becomes available, the old data
word continues to be transmitted and the new data is lost.
If
CS
is taken high at any time during data transmission,
SDAT A will go three-state immediately. If
CS
returns low, the
AD7703 will continue transmission with the same data bit. If
transmission has not been initiated and completed by the time
the next data word becomes available, and if
CS
is high,
DRDY
will return high for four clock cycles, then fall as the new word is
loaded into the output register.
DIGIT AL NOISE AND OUT PUT LOADING
As mentioned earlier, the AD7703 divides its internal timing
into two distinct phases, analog sampling and settling and digital
computation. In the SSC mode, data is transmitted only during
the digital computation periods, to minimize the effects of
digital noise on analog performance. In the SEC mode data
transmission is externally controlled, so this automatic safeguard
does not exist. T o compensate, the AD7703 should be
synchronized to the digital system clock via CLK IN when used
in the SEC mode.
Whatever mode of operation is used, resistive and capacitive
loads on digital outputs should be minimized in order to reduce
crosstalk between analog and digital portions of the circuit. For
this reason connection to low-power CMOS logic such as one of
the 4000 series or 74C families is recommended.
DRDY (O)
SDATA (O)
DB19 (MSB)
DB18
DB2
DB1
DB0 (LSB)
HI-Z
SCLK (O)
HI-Z
CS (I)
DB17
Figure 17. Timing Diagram for the SEC Mode
相關PDF資料 |
PDF描述 |
|---|---|
| AD7703AQ | LC2MOS 20-Bit A/D Converter |
| AD7703AR | LC2MOS 20-Bit A/D Converter |
| AD7703BN | LC2MOS 20-Bit A/D Converter |
| AD7703BQ | LC2MOS 20-Bit A/D Converter |
| AD7703BR | ECONOLINE: REC2.2-S_DRW(Z)/H* - 2.2W DIP Package- 1kVDC Isolation- Regulated Output- 4.5-9V, 9-18V, 18-36V, 36-72V Wide Input Range 2 : 1- UL94V-0 Package Material- Continuous Short Circiut Protection- Cost Effective- 100% Burned In- Efficiency to 84% |
相關代理商/技術參數 |
參數描述 |
|---|---|
| AD7703ANZ | 功能描述:IC ADC 20BIT LC2MOS MONO 20DIP RoHS:是 類別:集成電路 (IC) >> 數據采集 - 模數轉換器 系列:- 其它有關文件:TSA1204 View All Specifications 標準包裝:1 系列:- 位數:12 采樣率（每秒）:20M 數據接口:并聯 轉換器數目:2 功率耗散（最大）:155mW 電壓電源:模擬和數字 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-TQFP 供應商設備封裝:48-TQFP（7x7） 包裝:Digi-Reel® 輸入數目和類型:4 個單端，單極；2 個差分，單極 產品目錄頁面:1156 (CN2011-ZH PDF) 其它名稱:497-5435-6 |
| AD7703AQ | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| AD7703AR | 功能描述:IC ADC 20BIT LC2MOS 20-SOIC RoHS:否 類別:集成電路 (IC) >> 數據采集 - 模數轉換器 系列:- 標準包裝:1 系列:- 位數:14 采樣率（每秒）:83k 數據接口:串行，并聯 轉換器數目:1 功率耗散（最大）:95mW 電壓電源:雙 ± 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:28-DIP（0.600"，15.24mm） 供應商設備封裝:28-PDIP 包裝:管件 輸入數目和類型:1 個單端，雙極 |
| AD7703AR-REEL | 功能描述:IC ADC 20BIT LC2MOS MONO 20-SOIC RoHS:否 類別:集成電路 (IC) >> 數據采集 - 模數轉換器 系列:- 標準包裝:1 系列:- 位數:14 采樣率（每秒）:83k 數據接口:串行，并聯 轉換器數目:1 功率耗散（最大）:95mW 電壓電源:雙 ± 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:28-DIP（0.600"，15.24mm） 供應商設備封裝:28-PDIP 包裝:管件 輸入數目和類型:1 個單端，雙極 |
| AD7703ARZ | 功能描述:IC ADC 20BIT LC2MOS 20-SOIC RoHS:是 類別:集成電路 (IC) >> 數據采集 - 模數轉換器 系列:- 標準包裝:1 系列:- 位數:14 采樣率（每秒）:83k 數據接口:串行，并聯 轉換器數目:1 功率耗散（最大）:95mW 電壓電源:雙 ± 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:28-DIP（0.600"，15.24mm） 供應商設備封裝:28-PDIP 包裝:管件 輸入數目和類型:1 個單端，雙極 |
發布緊急采購，3分鐘左右您將得到回復。