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參數(shù)資料
| 型號： | AD7701AQ |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | ADC |
| 英文描述： | LC2MOS 16-Bit A/D Converter |
| 中文描述： | 1-CH 16-BIT DELTA-SIGMA ADC, SERIAL ACCESS, CDIP20 |
| 封裝： | CERDIP-20 |
| 文件頁數(shù)： | 14/16頁 |
| 文件大小： | 312K |
| 代理商： | AD7701AQ |
AD7701
REV. D
–14–
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 COPS series, 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 AD7701’s other modes.
As shown in Figure 20, 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
goes high and
SDAT A goes three-state. If
CS
is low and the AD7701 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 and SCLK will go three-state immediately. If
CS
re-
turns low, the AD7701 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.
CLKIN (I)
DRDY (O)
SDATA (O)
DB15 (MSB)
DB14
DB2
DB1
DB0 (LSB)
HI-Z
HI-Z
SCLK (O)
HI-Z
HI-Z
CS (I)
72 CLKIN
CYCLES
Figure 19. SSC Mode Showing Data Timing Relative to SCLK
SCLK (I)
SDATA (O)
DB15
(MSB)
DB14
DB13
DB1
DB0
(LSB)
HI-Z
HI-Z
DRDY (O)
CS (I)
Figure 20. Timing Diagram for the SEC Mode
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| AD7701ARS-REEL | 功能描述:IC ADC 16BIT LC2MOS MONO 28-SSOP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 位數(shù):14 采樣率（每秒）:83k 數(shù)據(jù)接口:串行，并聯(lián) 轉(zhuǎn)換器數(shù)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(yīng)商設(shè)備封裝:28-PDIP 包裝:管件 輸入數(shù)目和類型:1 個(gè)單端，雙極 |
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