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參數資料
| 型號： | AD7725 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 16-Bit 900 kSPS ADC with a Programmable Postprocessor |
| 中文描述： | 16位900 ksps模數轉換器的可編程后處理器 |
| 文件頁數： | 12/28頁 |
| 文件大小： | 442K |
| 代理商： | AD7725 |
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REV. A
–12–
AD7725
Pin No.
Mnemonic S/P
Description
38
SDO/DB8
Serial Mode
. SDO–Serial Data Output. The serial data is shifted out of the AD7725 MSB
first, in twos complement format, synchronous with SCO.
Parallel Mode
. DB8–Data Input/Output Bit.
Digital Power Supply Voltage.
Serial Mode
. SCO–Serial Clock Output. The frequency of SCO is a function of the CLKIN
frequency and is set by the SCR pin. When configuration data is being loaded into the
AD7725, SCO = f
CLKIN
/16.
Parallel Mode
. DB7–Data Input/Output Bit.
Serial Mode
. FSI–Frame Synchronization Input. FSI indicates the beginning of a word
transmission on the SDI pin.
Parallel Mode
. DB6–Data Input/Output Bit.
Serial Mode
. INIT–Logic Input. When the device is correctly configured, a logic low on this
pin will prevent the device from converting. When this pin is taken high, the device will start
converting. When daisy-chaining multiple devices, this pin ensures that all devices sample their
analog inputs simultaneously without needing to activate the SYNC pin.
Parallel Mode
. DB5–Data Input/Output Bit.
Serial Mode
.
RESETCFG
–Logic Input.
RESETCFG
is used to reset the part when a
configuration error occurs. A low pulse on this pin will reset the part, and the configuration
file will be downloaded again. The
SOE
pin will go high following a pulse on the
RESETCFG
pin and then again following a successful configuration.
Parallel Mode
. DB4–Data Input/Output Bit.
Serial Mode
. DGND–Digital Ground.
Parallel Mode
. DB3–Data Input/Output Bit.
39
40
DV
DD
SCO/DB7
41
FSI/DB6
42
INIT/DB5
43
RESETCFG
/DB4
44
DGND/DB3
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