Datasheet

LTC6421-20
5
642120fb
Input and Output Impedance
vs Frequency
Noise Figure and Input Referred
Noise Voltage vs Frequency
Small-Signal Transient Response
TYPICAL PERFORMANCE CHARACTERISTICS
Frequency Response
Channel-to-Channel Gain Match
vs Frequency
Input and Output Refl ection and
Reverse Isolation vs Frequency
FREQUENCY (MHz)
10
–0.1
GAIN MATCH (dB)
0
0.1
0.2
0.3
100 1000 2000
642120 G01
–0.2
–0.3
–0.4
–0.5
0.4
0.5
FREQUENCY (MHz)
10
–0.1
GROUP DELAY MATCH (ns)
0
0.1
0.2
0.3
100 1000 2000
642120 G02
–0.2
–0.3
–0.4
–0.5
0.4
0.5
FREQUENCY (MHz)
10
–1.0
PHASE MATCH (DEG)
–0.5
0
1.0
100 500
642120 G03
0.5
Channel-to-Channel Group Delay
Match vs Frequency
Channel-to-Channel Phase Match
vs Frequency
FREQUENCY (MHz)
10 100 1000 3000
GAIN (dB)
25
20
15
10
5
0
642120 G04
TEST CIRCUIT B
S21 Phase and Group Delay
vs Frequency
FREQUENCY (MHz)
0
PHASE (DEGREE)
100
0
–100
–200
–300
–400
GROUP DELAY (ns)
1.5
1.2
0.9
0.6
0.3
0
200 400 600 800
1000
642120 G05
PHASE
TEST CIRCUIT B
GROUP DELAY
FREQUENCY (MHz)
10
S PARAMETERS (dB)
0
–10
–20
–30
–40
–50
–60
–70
–80
100 1000 3000
642120 G06
S11
S22
S12
TEST CIRCUIT B
FREQUENCY (MHz)
1
IMPEDANCE MAGNITUDE (Ω)
250
200
150
100
50
0
225
175
125
75
25
IMPEDANCE PHASE (DEGREE)
100
80
60
40
20
–80
–60
–40
–20
0
–100
10 100 1000
642120 G07
Z
IN
Z
OUT
Z
IN
Z
OUT
PHASE
IMPEDANCE MAGNITUDE
FREQUENCY (MHz)
10
NOISE FIGURE (dB)
15
10
2
4
12
14
6
8
0
11
3
5
13
7
9
1
INPUT REFERRED NOISE VOLTAGE (nV/√Hz)
6
4
2
0
100 1000
642120 G08
NOISE FIGURE
e
IN
TIME (ns)
0
OUTPUT VOLTAGE (V)
1.35
1.20
1.25
1.30
1.15
51015
20
642120 G09
–OUT
+OUT
R
L
= 87.5Ω PER OUTPUT