LTC6601-2_15 Datasheet, PDF (34/40 Pages) Linear Technology – Low Power, Low Distortion, 5MHz to 27MHz, Pin Confi gurable Filter/ADC Driver

LTC6601-2
APPLICATIONS INFORMATION
V_IN(DIFF)
Z_IN(DIFF) = 400Ω
20 19 18 17 16
LTC6601-2
1
15
2
+
200Ω
4
–
V_IN(DIFF)
V_{OUT(DIFF) ZIN(DIFF) = 200Ω}
5
11
20 19 18 17 16
LTC6601-2
1
15
2
+
4
–
V_OUT(DIFF)
5
11
6 7 8 9 10
GAIN = 1
f_O = 16MHz
Q = 0.868
f_–1dB = 15.4MHz
f_–3dB = 19MHz
6 7 8 9 10
GAIN = 2
f_O = 16MHz
Q = 0.868
f_–1dB = 15.4MHz
f_–3dB = 19MHz
66012 F15a
Gain Magnitude vs Frequency (Gain = 1)
5
0
–5
–10
–15
–20
–25
–30
–35
–40
100k
1M
10M
FREQUENCY (Hz)
100M
66012 F15b
Passband Phase and Group Delay
30
0 ^PHASE
–30
–60
–90
–120
50
40
30
GROUP DELAY
20
10
0
100k
0
4M 8M 12M 16M 20M
FREQUENCY (Hz)
66012 F15c
Figure 15. Modified Filter Configuration Using a Resistor Between Summing Nodes (f_–3dB = 19MHz)
66012f
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