參數(shù)資料
型號(hào)： LT6350CMS8#PBF
廠商： LINEAR TECHNOLOGY CORP
元件分類： ADC
英文描述： 1-CH 16-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, PDSO8
封裝： LEAD FREE, PLASTIC, MSOP-8
文件頁(yè)數(shù)： 18/28頁(yè)
文件大小： 462K
代理商： LT6350CMS8#PBF
LT6350
25
6350fb
+
–
+IN1
–IN1
V+
V–
OUT2
OUT1
SHDN
+IN2
5V
2.5V
499Ω
87
3
5
12
6
4
0.1μF
2.5V
1000pF
R3
523Ω
LT6350
6350 F13
+
–
VOUT1
VOUT2
C5
1000pF
4750Ω
0.01μF
VIN
+
–
174Ω
2210Ω
Figure 13. 100KHz, 3rd Order Butterworth Filter
APPLICATIONS INFORMATION
100kHz, 3RD-ORDER BUTTERWORTH FILTER
The LT6350 can be congured as a single-ended to
differential lter incorporating feedback from the inverting
output. Figure 13 shows the schematic of the conguration
with values giving a 3rd Order Butterworth characteristic
having a 100kHz –3dB point with a differential gain of four.
Figure 14 shows the lter output response to 10MHz. As
an option, to match the source impedance and preserve
the low DC errors of the LT6350, connect a 2.10k series
resistor at +IN1. To reduce the resistor noise, the +IN1
pin can be bypassed with a 0.1μF capacitor. For similar
topologies please consult the LT1567 data sheet and
design guide.
Low Noise, Low Power 1MΩ Single Supply Photo-
diode Differential Output Transimpedance Amplier
The Typical Application on the back page shows the LT6350
applied as a differential output transimpedance amplier.
The LT6350 forces the BF862 ultralow noise JFET source
to 3V, with R2 ensuring that the JFET has an IDRAIN of 1mA.
The JFET acts as a source follower, buffering the input of
the LT6350 and making it suitable for the high impedance
feedback element R1. The BF862 has a minimum IDSS of
10mA and a pinchoff voltage between –0.3V and –1.2V.
The JFET gate and OUT1 therefore sit at a point slightly
higher than one pinchoff voltage below 3V, about mid-
supply at 2.5V.
When the photodiode is illuminated, the current must come
from OUT1 through R1 as in a normal transimpedance
amplier. Amplier output noise density is dominated at
low frequency by the 130nV/√Hz of the feedback resistor,
rising to 210nV/√Hz at 1MHz. Note that because the JFET
has a high gm,approximately1/30Ω,itsattenuationlooking
into R2 is only about 1%. The closed-loop bandwidth
using a 3pF photodiode was measured at approximately
1.35MHz. With the output taken differentially, the gain and
the noise are both doubled.
Figure 14. 100KHz, 3rd Order Butterworth Filter Response
FREQUENCY (Hz)
1K
GAIN
(dB)
20
–60
–40
–80
–20
0
–100
100K
1M
6350 F14
10M
10K
相關(guān)PDF資料
PDF描述
LT6350IMS8#PBF 1-CH 16-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, PDSO8
LT6350CMS8#TRPBF 1-CH 16-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, PDSO8
LT6350HDD#PBF 1-CH 16-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, PDSO8
LT6350HMS8#PBF 1-CH 16-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, PDSO8
LT6350CDD#PBF 1-CH 16-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, PDSO8
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LT6350CMS8TRPBF 制造商:LINER 制造商全稱:Linear Technology 功能描述:Low Noise Single-Ended to Differential Converter/ADC Driver
LT6350HDD#PBF 功能描述:IC DIFF CONVERT/ADC DRIVER 8-DFN RoHS:是 類別:集成電路 (IC) >> 線性 - 放大器 - 專用 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:60 系列:- 類型:可變?cè)鲆娣糯笃?應(yīng)用:CATV 安裝類型:表面貼裝 封裝/外殼:20-WQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:20-TQFN-EP（5x5） 包裝:托盤
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LT6350HDDTRPBF 制造商:LINER 制造商全稱:Linear Technology 功能描述:Low Noise Single-Ended to Differential Converter/ADC Driver
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