LTC6401-20 Datasheet, PDF (6/16 Pages) Linear Technology – 1.3GHz Low Noise, Low Distortion Differential ADC Driver for 140MHz IF

LTC6401-20
TYPICAL PERFORMANCE CHARACTERISTICS
Input and Output Reflection and
Reverse Isolation vs Frequency
0 _{TEST CIRCUIT B}
–10
–20
S11
–30
S22
–40
–50
–60
S12
–70
–80
10
100
1000 3000
FREQUENCY (MHz)
640120 G04
Input and Output Impedance vs
Frequency
250
100
225
80
Z_IN
200
60
175
40
150
Z_OUT
20
125
Z_IN
0
100
–20
75
PHASE
–40
IMPEDANCE MAGNITUDE
50
–60
25
0
1
Z_OUT
10
100
FREQUENCY (MHz)
–80
–100
1000
640120 G05
PSRR and CMRR vs Frequency
100
90
80
PSRR
70
60
50
CMRR
40
30
20
10
0
1
10
100
1000
FREQUENCY (MHz)
640120 G06
Noise Figure and Input Referred
Noise Voltage vs Frequency
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
10
6
4
NOISE FIGURE
2
e_IN
100
FREQUENCY (MHz)
0
1000
640120 G07
Small Signal Transient Response
1.35 _{RL = 87.5Ω PER OUTPUT}
1.30
+OUT
1.25
1.20
–OUT
Large Signal Transient Response
2.5 _{RL = 87.5Ω PER OUTPUT}
2.0
+OUT
1.5
1.0
–OUT
0.5
1.15
0
0
5
10
15
20
0
TIME (ns)
640120 G08
5
10
15
20
TIME (ns)
640120 G09
Overdrive Transient Response
2.5
–OUT ^{RL = 87.5Ω PER OUTPUT}
2.0
1.5
1.0
0.5
0
0
+OUT
50
100
TIME (ns)
150
200
640120 G10
1% Settling Time for 2V
Output Step
5
R_L = 87.5Ω PER OUTPUT
4
3
2
1
0
–1
–2
–3
–4
–5
0
1
2
3
4
5
6
TIME (ns)
640120 G11
640120f
6