參數(shù)資料
型號: AD5748ACPZ-RL7
廠商: Analog Devices Inc
文件頁數(shù): 25/32頁
文件大小: 0K
描述: IC I/V OUTPUT DRIVER 32LFCSP
標(biāo)準(zhǔn)包裝: 1,500
放大器類型: 儀表
電路數(shù): 1
轉(zhuǎn)換速率: 2 V/µs
電流 - 輸出 / 通道: 15mA
電壓 - 電源,單路/雙路(±): ±12 V ~ 24 V
工作溫度: -40°C ~ 105°C
安裝類型: 表面貼裝
封裝/外殼: 32-VFQFN 裸露焊盤,CSP
供應(yīng)商設(shè)備封裝: 32-LFCSP-VQ(5x5)
包裝: 帶卷 (TR)
AD5748
Rev. A | Page 31 of 32
GALVANICALLY ISOLATED INTERFACE
In many process control applications, it is necessary to provide
an isolation barrier between the controller and the unit being
controlled to protect and isolate the controlling circuitry from
any hazardous common-mode voltages that may occur. The
iCoupler family of products from Analog Devices, Inc., provides
voltage isolation in excess of 5.0 kV. The serial loading structure
of the AD5748 makes it ideal for isolated interfaces because the
number of interface lines is kept to a minimum. Figure 56 shows
a 4-channel isolated interface using an ADuM1400. For further
information, visit www.analog.com/icouplers.
DE
CO
DE
E
NCO
DE
VIA
VOA
TO
SCLK
VIB
VOB
TO
SDIN
VIC
VOC
TO
SYNC
VID
VOD
TO
CLEAR
SERIAL
CLOCK OUT
SERIAL
DATA OUT
SYNC OUT
CONTROL OUT
CONTROLLER
ADuM14001
1ADDITIONAL PINS OMITTED FOR CLARITY.
DE
CO
DE
E
NCO
DE
CO
DE
E
NCO
DE
CO
DE
E
NCO
DE
08
922
-0
58
Figure 56. Isolated Interface
MICROPROCESSOR INTERFACING
Microprocessor interfacing to the AD5748 is via a serial bus
that uses a protocol compatible with microcontrollers and DSP
processors. The communications channel is a 3-wire (minimum)
interface consisting of a clock signal, a data signal, and a SYNC
signal. The AD5748 requires a 16-bit data-word with data valid
on the falling edge of SCLK.
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