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參數(shù)資料
| 型號(hào)： | EVAL-AD7851CB |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 14-Bit 333 kSPS Serial A/D Converter |
| 中文描述： | 14位333 kSPS的串行A / D轉(zhuǎn)換器 |
| 文件頁(yè)數(shù)： | 29/36頁(yè) |
| 文件大?。?/td> | 435K |
| 代理商： | EVAL-AD7851CB |
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–29–
REV. A
AD7851
Interface Mode 1 Configuration
Figure 42 shows the flowchart for configuring the part in Inter-
face Mode 1. T his mode of operation can only be enabled by
writing to the control register and setting the 2/
3
MODE bit.
Reading and writing cannot take place simultaneously in this
mode as the DIN pin is used for both reading and writing.
SERIAL
INTERFACE
MODE
POWER-ON, APPLY CLKIN SIGNAL,
WAIT 150ms FOR AUTOMATIC CALIBRATION
NO
YES
WAIT FOR BUSY SIGNAL TO GO
LOW OR WAIT FOR BUSY BIT = 0
READ
DATA
DURING
CONVERSION
APPLY
SYNC
(IF REQUIRED), SCLK, READ
CURRENT CONVERSION RESULT ON DIN PIN
1
INITIATE
CONVERSION
IN
SOFTWARE
WAIT APPROXIMATLY 200ns
AFTER
CONVST
RISING EDGE
OR AFTER END OF CONTROL
REGISTER WRITE
APPLY
SYNC
(IF REQUIRED),
SCLK, READ PREVIOUS CONVERSION
RESULT ON DIN PIN
NO
YES
APPLY
SYNC
(IF REQUIRED),
SCLK, WRITE TO CONTROL REGISTER
SETTING THE TWO-WIRE MODE
AND CONVST BIT TO 1
START
APPLY
SYNC
(IF REQUIRED),
SCLK, WRITE TO CONTROL REGISTER
SETTING THE TWO-WIRE MODE
PULSE
CONVST
PIN
Figure 42. Flowchart for Setting Up, Reading, and Writing
in Interface Mode 1
Interface Modes 4 and 5 Configuration
Figure 43 shows the flowchart for configuring the AD7851 in
Interface Modes 4 and 5, the self-clocking modes. In this case it
is not recommended to use the software conversion start option.
T he read and write operations always occur simultaneously and
during conversion.
POWER-ON, APPLY CLKIN SIGNAL,
WAIT 150ms FOR AUTOMATIC CALIBRATION
SYNC
AUTOMATICALLY GOES
LOW AFTER
CONVST
RISING EDGE
PULSE
CONVST
PIN
SCLK AUTOMATICALLY ACTIVE, READ CURRENT
CONVERSION RESULT ON DOUT PIN, WRITE
TO CONTROL REGISTER ON DIN PIN
4, 5
START
SERIAL
INTERFACE
MODE
Figure 43. Flowchart for Setting Up, Reading, and Writing
in Interface Modes 4 and 5
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| EVAL-AD7851CB4 | 制造商:AD 制造商全稱(chēng):Analog Devices 功能描述:14-Bit 333 kSPS Serial A/D Converter |
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