LMH6514_14 Datasheet, PDF (10/29 Pages) Texas Instruments – LMH6514 600 MHz, Digital Controlled, Variable Gain Amplifier

LMH6514
SNOSB06 – JANUARY 2008
www.ti.com
V_CC = 5V
Typical Performance Characteristics (continued)
Noise Figure for All Gain Settings
55
50
45
f = 150 MHz
40
35
30
f = 75 MHz
25
20
15
10
5
0 1 2 3 4 56 7
GAIN SETTING (0 = MAXIMUM GAIN)
Figure 14.
Noise Figure vs. Frequency
13
MAXIMUM GAIN
12
11
10
9
8
0
100
200
300
400
FREQUENCY (MHz)
Figure 15.
Differential Output Noise
60
f = 75 MHz
50
R_L = 133:
40
30
R_L = 100:
20
10
Maximum Gain vs. Supply Voltage
26
R_L = 100:
P_IN = -25 dBm
25.5
f = 75 MHz
25
f = 150 MHz
24.5
f = 250 MHz
0
01 2 3 4 5 6 7
GAIN SETTING (0 = MAXIMUM GAIN)
Figure 16.
Gain vs. External Load
42
400: INTERNAL WITH 400:
EXTERNAL = 32 dB NET
38
34
INTERNAL LOAD
= 400:
30
INTERNAL LOAD =
200:
26
22
200: INTERNAL WITH 200:
EXTERNAL = 26 dB NET
18
10
100
1k
10k
100k
EXTERNAL DIFFERENTIAL LOAD (:)
Figure 18.
24
3.5
4
4.5
5
5.5
SUPPLY VOLTAGE (V)
Figure 17.
Maximum Gain over Temperature
26
25.5
f = 75 MHz
25
f = 150 MHz
24.5
f = 250 MHz
24
23.5
V_OUT = 2 V_PP
23 ^{RL = 100:}
-40 -20 0 20 40 60 80
TEMPERATURE (°C)
Figure 19.
10
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