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標題: AD7176-2 AD8475 ADR445 24 位、250 kSPS 單電源數據采集系統設計 [打印本頁]

作者: happy112 時間: 2016-6-19 14:41
標題: AD7176-2 AD8475 ADR445 24 位、250 kSPS 單電源數據采集系統設計

實物圖：

對工業電平信號進行采樣時，必須提供快速高分辨率轉換信息。通常，當采樣速率達到500 kSPS時，模數轉換器(ADC) 的分辨率可為14位至18位。如圖所示電路是一款針對工業電平信號采樣進行優化的單電源系統，采用一個24位、 250 kSPS∑-△型ADC芯片AD7176-2。兩個差分通道或四個偽差分通道中的每一個都能夠在采樣率為50kSPS時提供17.2位的無噪聲代碼分辨率。
本電路利用內置激光微調電阻的創新型差分放大器實現衰減和電平轉換，利用低電源電壓的精密ADC可以解決獲取 ±5 V、±10 V和0 V至10 V的標準工業電平信號并進行數字化處理的問題。本電路可應用于過程控制(PLC/DCS模塊)、醫療以及科學多通道儀器和色譜儀。

電路原理圖：

BOM表（完整版見附件）：

A0	SMB			SMA	No	Top	Straight PCB Mount SMB Jack, keep hole clear of solder	Tyco	1-1337482-0	Do Not Insert. Keep clear of solder.
A1	SMB			SMA	No	Top	Straight PCB Mount SMB Jack, keep hole clear of solder	Tyco	1-1337482-0	Do Not Insert. Keep clear of solder.
A2	SMB			SMA	No	Top	Straight PCB Mount SMB Jack, keep hole clear of solder	Tyco	1-1337482-0	Do Not Insert. Keep clear of solder.
A3	SMB			SMA	No	Top	Straight PCB Mount SMB Jack, keep hole clear of solder	Tyco	1-1337482-0	Do Not Insert. Keep clear of solder.
A4	SMB			SMA	No	Top	Straight PCB Mount SMB Jack, keep hole clear of solder	Tyco	1-1337482-0	Do Not Insert. Keep clear of solder.
A5	SMB	DNI		SMA	No	Top	Straight PCB Mount SMB Jack, keep hole clear of solder	Tyco	1-1337482-0	Do Not Insert. Keep clear of solder.
A6	SMB	DNI		SMA	No	Top	Straight PCB Mount SMB Jack, keep hole clear of solder	Tyco	1-1337482-0	Do Not Insert. Keep clear of solder.
AIN0	TESTPOINTS	DNI		TESTPOINT-SMALL	No	Top	Test point, not inserted, keep hole clear of solder	n/a	n/a	Do Not Insert. Keep clear of solder.
AIN1	TESTPOINTS	DNI		TESTPOINT-SMALL	No	Top	Test point, not inserted, keep hole clear of solder	n/a	n/a	Do Not Insert. Keep clear of solder.
AIN2	TESTPOINTS	DNI		TESTPOINT-SMALL	No	Top	Test point, not inserted, keep hole clear of solder	n/a	n/a	Do Not Insert. Keep clear of solder.
AIN3	TESTPOINTS	DNI		TESTPOINT-SMALL	No	Top	Test point, not inserted, keep hole clear of solder	n/a	n/a	Do Not Insert. Keep clear of solder.
AIN4	TESTPOINTS	DNI		TESTPOINT-SMALL	No	Top	Test point, not inserted, keep hole clear of solder	n/a	n/a	Do Not Insert. Keep clear of solder.
AIN4'	TESTPOINTS	DNI		TESTPOINT-SMALL	No	Top	Test point, not inserted, keep hole clear of solder	n/a	n/a	Do Not Insert. Keep clear of solder.
C1	CAP	4.7uF	±10%	C0603	Yes	Top	Capacitor ceramic, 6.3V, X5R, 0603	Murata	GRM188R60J475K	FEC 173-5527
C2	CAP	0.1uF	±10%	C0603	Yes	Top	Capacitor ceramic, 50V, X7R, 0603	Murata	GRM188R71H104K	FEC 882-0023
C3	CAP	4.7uF	±10%	C0603	Yes	Top	Capacitor ceramic, 10V, X5R, 0603	Kemet	C0603C475K8PACTU	FEC 157-2625
C4	CAP	1uF	±10%	C0805	Yes	Top	CAPACITOR, 0805, 1UF, 50V, X7R	MURATA	GRM21BR71H105KA12L	FEC 1735541
C5	CAP	DNI	TBD	C0402	Yes	Top	Ceramic Capacitor, not inserted, 0402	n/a	n/a	Do Not Insert
C6	CAP	1uF	±10%	C0805	Yes	Top	CAPACITOR, 0805, 1UF, 50V, X7R	MURATA	GRM21BR71H105KA12L	FEC 1735541
C7	CAP	DNI	TBD	C0402	Yes	Bottom	Ceramic Capacitor, not inserted, 0402	n/a	n/a	Do Not Insert
C8	CAP	DNI	TBD	C0402	Yes	Top	Ceramic Capacitor, not inserted, 0402	n/a	n/a	Do Not Insert
C9	CAP	DNI	TBD	C0402	Yes	Top	Ceramic Capacitor, not inserted, 0402	n/a	n/a	Do Not Insert
C10	CAP	DNI	TBD	C0402	Yes	Top	Ceramic Cap XTAL, not inserted, 0402	n/a	n/a	Do Not Insert
C11	CAP	DNI	TBD	C0402	Yes	Top	Ceramic Cap XTAL, not inserted, 0402	n/a	n/a	Do Not Insert
C12	CAP	0.1uF	±10%	C0402	Yes	Top	Capacitor ceramic, 16V, X7R, 0402	Murata	GRM155R71C104K	FEC 881-9742
C13	CAP	0.1uF	±10%	C0402	Yes	Top	Capacitor ceramic, 16V, X7R, 0402	Murata	GRM155R71C104K	FEC 881-9742
C14	CAP	0.1uF	±10%	C0402	Yes	Top	Capacitor ceramic, 16V, X7R, 0402	Murata	GRM155R71C104K	FEC 881-9742
C15	CAP	1uF	±10%	C0603	Yes	Bottom	CAPACITOR, 0603, 1UF, 6.3V	Murata	GRM188R70J105KA01D	FEC 184-5765
C16	CAP	DNI	TBD	C0402	Yes	Top	Ceramic Capacitor, not inserted, 0402	n/a	n/a	Do Not Insert
C17	CAP	4.7uF	±10%	C0603	Yes	Top	Capacitor ceramic, 6.3V, X5R, 0603	Murata	GRM188R60J475K	FEC 173-5527
C18	CAP	0.1uF	±10%	C0402	Yes	Top	Capacitor ceramic, 16V, X7R, 0402	Murata	GRM155R71C104K	FEC 881-9742
C19	CAP	270pF	±5%	C0603	Yes	Top	Ceramic Capacitor, 50V, C0G/NPO, 0603	AVX	06035A271JAT2A	FEC 1734627
C20	CAP	0.1uF	±10%	C0402	Yes	Bottom	Capacitor ceramic, 16V, X7R, 0402	Murata	GRM155R71C104K	FEC 881-9742
C21	CAP	0.1uF	±10%	C0402	Yes	Top	Capacitor ceramic, 16V, X7R, 0402	Murata	GRM155R71C104K	FEC 881-9742
C22	CAP	0.1uF	±10%	C0402	Yes	Top	Capacitor ceramic, 16V, X7R, 0402	Murata	GRM155R71C104K	FEC 881-9742
C23	CAP	680pF	±5%	C0603	Yes	Top	Ceramic Capacitor, 50V, NPO, 0603	KEMET	C0603C681J5GACTU	FEC 1414648
C24	CAP	DNI	TBD	C0402	Yes	Top	Ceramic Capacitor, not inserted, 0402	n/a	n/a	Do Not Insert
C25	CAP	DNI	TBD	C0603	Yes	Top	Ceramic Capacitor, not inserted, 0402	n/a	n/a	Do Not Insert
C26	CAP	680pF	±5%	C0603	Yes	Top	Ceramic Capacitor, 50V, NPO, 0603	Kemet	C0603C681J5GACTU	FEC 1414648
C27	CAP	270pF	±5%	C0603	Yes	Top	Ceramic Capacitor, 50V, C0G/NPO, 0603	AVX	06035A271JAT2A	FEC 1734627
C28	CAP	270pF	±5%	C0603	Yes	Top	Ceramic Capacitor, 50V, C0G/NPO, 0603	AVX	06035A271JAT2A	FEC 1734627
C29	CAP	4.7uF	±10%	C0603	Yes	Top	Capacitor ceramic, 6.3V, X5R, 0603	Murata	GRM188R60J475K	FEC 173-5527
C30	CAP	4.7uF	±10%	C0603	Yes	Top	Capacitor ceramic, 6.3V, X5R, 0603	Murata	GRM188R60J475K	FEC 173-5527
C31	CAP	DNI	±10%	C0402	Yes	Top	Capacitor ceramic, 16V, X7R, 0402	Murata	GRM155R71C104K	Do Not Insert
C32	CAP	10uF	tba	1210	Yes	Top	Capacitor ceramic, 50V, X5R, 1210	Murata	GRM32ER61H106K	FEC 184-5764
C33	CAP	0.1uF	±10%	C0402	Yes	Top	Capacitor ceramic, 16V, X7R, 0402	Murata	GRM155R71C104K	FEC 881-9742
C34	CAP	0.1uF	±10%	C0402	Yes	Bottom	Capacitor ceramic, 16V, X7R, 0402	Murata	GRM155R71C104K	FEC 881-9742

全部資料（壓縮包）下載：

24 位、250 kSPS 單電源數據采集系統設計.pdf

394.44 KB, 下載次數: 11, 下載積分: 黑幣 -5

BOM表.zip

32.47 KB, 下載次數: 7, 下載積分: 黑幣 -5

原理圖、PCB板、gerber工程文件.zip

1.45 MB, 下載次數: 12, 下載積分: 黑幣 -5

原理圖、元件布局圖PDF文件.zip

2.06 MB, 下載次數: 11, 下載積分: 黑幣 -5

作者: woyaodwn 時間: 2025-3-2 23:04
這個可以實現嗎？

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