LMH6514_14 Datasheet, PDF (11/29 Pages) Texas Instruments – LMH6514 600 MHz, Digital Controlled, Variable Gain Amplifier

LMH6514
www.ti.com
SNOSB06 – JANUARY 2008
V_CC = 5V
Typical Performance Characteristics (continued)
Worst Case Gain Step Error
vs
Frequency
6.45
6.40 ^{VOUT = 1 VPP}
R_L = 100:
6.35
f = 250 MHz
6.30
f = 150 MHz
6.25
f = 75 MHz
6.20
6.15
6.10
6.05
6.00
5.95
1
2
HIGH
GAIN
IDEAL
3
4
5
GAIN STEP
Figure 20.
67
LOW
GAIN
Gain Steps over Temperature
6.25
f = 150 MHz
6.20 ^VOUT ^{= 2 V}PP
R_L = 100:
6.15
85°C
6.10 _25°C
6.05
6.00
-40°C
5.95
5.90
1
2
3
4
5
67
GAIN STEP (0 = MAXIMUM GAIN)
Figure 21.
Worst Case Gain Step Error over Temperature
0.4
R_L = 100:
0.35
0.3
0.25
85°C
0.2
0.15
25°C
0.1
-40°C
0.05
0
0 50 100 150 200 250 300
FREQUENCY (MHz)
Figure 22.
Input Impedance (S11) at Maximum Gain
350
300
250
|Z|
200
150
R
100
50
jX
0
-50
50 100 150 200 250 300 350 400 450
FREQUENCY (MHz)
Figure 23.
Input Impedance (S11) at Minimum Gain
350
300
250
|Z|
200
150
R
100
50
jX
0
-50
50 100 150 200 250 300 350 400 450
FREQUENCY (MHz)
Figure 24.
Output Impedance (S22) at Maximum Gain Low Gain Mode
350
300
|Z|
250
200
150
100
R
jX
50
0
-50
50 100 150 200 250 300 350 400 450
FREQUENCY (MHz)
Figure 25.
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