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參數(shù)資料
| 型號： | LTC6604CUFF-15#TRPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 模擬信號調(diào)理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PQCC34 |
| 封裝： | 4 X 7 MM, 0.75 MM HEIGHT, LEAD FREE, PLASTIC, QFN-34 |
| 文件頁數(shù)： | 16/16頁 |
| 文件大?。?/td> | 203K |
| 代理商： | LTC6604CUFF-15#TRPBF |
LT6604-15
9
660415fa
APPLICATIONS INFORMATION
Interfacing to the LT6604-15
Note: The LT6604-15 contains two identical lters. The
following applications information only refers to one lter.
The two lters are independent except that they share the
same negative supply voltage V–. The two lters can be
used simultaneously by replicating the example circuits.
The referenced pin numbers correspond to the A channel
lter
The LT6604-15 channel requires two equal external re-
sistors, RIN, to set the differential gain to 536Ω/RIN. The
inputs to the lter are the voltages VIN+ and VIN– presented
to these external components, Figure 1. The difference
between VIN+ and VIN– is the differential input voltage. The
average of VIN+andVIN–isthecommonmodeinputvoltage.
Similarly, the voltages VOUT+ and VOUT– appearing at Pins
27 and 29 of the LT6604-15 are the lter outputs. The dif-
ference between VOUT+ and VOUT– is the differential output
voltage. The average of VOUT+ and VOUT– is the common
mode output voltage. Figure 1 illustrates the LT6604-15
operating with a single 3.3V supply and unity passband
gain; the input signal is DC coupled. The common mode
input voltage is 0.5V, and the differential input voltage is
2VP-P. The common mode output voltage is 1.65V, and the
differential output voltage is 2VP-P for frequencies below
15MHz. The common mode output voltage is determined
by the voltage at VOCM. Since VOCM is shorted to VMID,
the output common mode is the mid-supply voltage. In
addition, the common mode input voltage can be equal
to the mid-supply voltage of VMID.
Figure 2 shows how to AC couple signals into the LT6604-15.
In this instance, the input is a single-ended signal. AC cou-
pling allows the processing of single-ended or differential
signals with arbitrary common mode levels. The 0.1μF
coupling capacitor and the 536Ω gain setting resistor
form a high pass lter, attenuating signals below 3kHz.
Larger values of coupling capacitors will proportionally
reduce this highpass 3dB frequency.
–
+
536Ω
0.01μF
0.1μF
3.3V
–
+
VIN
–
VIN
+
25
27
4
34
6
2
29
7
660415 F01
VOUT
+
VOUT
–
V
t
3
2
1
VIN
+
VIN
–
V
t
3
2
1
VOUT
+
LT6604-15
VOUT
–
0
1/2
–
+
536Ω
0.01μF
0.1μF
3.3V
–
+
VIN
+
25
1/2
27
4
34
6
2
29
7
660415 F02
VOUT
+
VOUT
–
V
3
2
1
V
t
1
0
–1
VIN
+
LT6604-15
VOUT
+
VOUT
–
Figure 1
Figure 2
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|---|---|
| LTC6604IUFF-10-TRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Dual Very Low Noise, Differential Amplifi er and 10MHz Lowpass Filter |
| LTC6604IUFF-15-TRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Dual Very Low Noise, Differential Amplifi er and 15MHz Lowpass Filter |
| LTC6605-10 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:16-Bit, 20Msps Low Power ADC |
| LTC6605-14 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:16-Bit, 20Msps Low Power ADC |
| LTC6605-7 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:16-Bit, 20Msps Low Power Dual ADC |
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