VINV
參數(shù)資料
型號: LT6604IUFF-5#TRPBF
廠商: Linear Technology
文件頁數(shù): 16/16頁
文件大小: 0K
描述: IC AMP DIFF LN DUAL 34-QFN
標準包裝: 2,500
放大器類型: 差分
電路數(shù): 2
輸出類型: 差分
電流 - 輸入偏壓: 30µA
電壓 - 輸入偏移: 8000µV
電流 - 電源: 30mA
電壓 - 電源,單路/雙路(±): 3 V ~ 11 V,±1.5 V ~ 5.5 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 34-WFQFN 裸露焊盤
供應商設備封裝: 34-QFN-EP(4x7)
包裝: 帶卷 (TR)
LT6604-5
9
66045fa
APPLICATIONS INFORMATION
+
806Ω
0.01μF
0.1μF
3.3V
+
VIN
VIN
+
66045 F01
VOUT
+
VOUT
V
t
3
2
1
VIN
+
VIN
V
t
3
2
1
VOUT
+
1/2
LT6604-5
VOUT
0
25
27
4
34
6
2
29
7
+
806Ω
0.01μF
0.1μF
3.3V
+
VIN
+
66045 F02
VOUT
+
VOUT
V
3
2
1
t
0
VOUT
+
VOUT
2
V
t
1
0
–1
VIN
+
25
27
4
34
6
2
29
7
1/2
LT6604-5
+
200Ω
0.1μF
0.01μF
5V
+
VIN
VIN
+
25
27
4
34
6
2
29
7
66045 F03
VOUT
+
VOUT
+
2V
V
t
3
2
1
0
VOUT
+
VOUT
V
t
3
2
1
0
VIN
+
VIN
500mVP-P (DIFF)
62pF
1/2
LT6604-5
Figure 1
Figure 2
Figure 3
Interfacing to the LT6604-5
Note: The LT6604-5 contains two identical lters. The fol-
lowing 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.
Each LT6604-5 channel requires two equal external re-
sistors, RIN, to set the differential gain to 806Ω/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+ and VIN– is the common mode input
voltage. Similarly, the voltages VOUT+ and VOUT– appearing
at Pins 27 and 29 of the LT6604-5 are the lter outputs.
The difference between VOUT+ and VOUT– is the differential
output voltage. The average of VOUT+ and VOUT– is the com-
mon mode output voltage. Figure 1 illustrates the LT6604-5
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
5MHz. 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 LT6604-5.
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 806Ω gain setting resistor form
a high pass lter, attenuating signals below 2kHz. Larger
values of coupling capacitors will proportionally reduce
this highpass 3dB frequency.
In Figure 3 the LT6604-5 is providing 12dB of gain. The
gain resistor has an optional 62pF in parallel to improve
the passband atness near 5MHz. The common mode
output voltage is set to 2V.
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