LMH6518_15 Datasheet, PDF (15/41 Pages) Texas Instruments – LMH6518 900 MHz, Digitally Controlled, Variable Gain Amplifier

LMH6518
www.ti.com
SNOSB21C – MAY 2008 – REVISED JULY 2013
Typical Performance Characteristics (continued)
Unless otherwise specified, Input CM = 2.5V, V_CM = 1.2V, V_{CM AUX} = 1.2V, Single-ended input drive, V_CC = 5V, V_DD = 3.3V, R_L
= 100Ω differential (both Main & Auxiliary Outputs), V_OUT = 0.7 V_PP differential (both Main and Auxiliary Outputs), Main output
specification (Auxiliary is labeled “Auxiliary”), full bandwidth setting, gain = 18.8 dB (Preamp LG, 0 dB ladder attenuation), Full
Power setting ⁽¹⁾.
Step Response
Step Response
0.4
0.4
0.3 ^{HI to LO}
0.2
LO to HI
0.3 ^{HI to LO}
0.2
LO to HI
0.1
Output
0
Input
Input = 20 mV/DIV
LG, 0 dB
-0.1
LO to HI
-0.2
HI to LO
-0.3
0.1
Output
0
Input
Input = 20 mV/DIV
HG, 20 dB
-0.1
LO to HI
-0.2
HI to LO
-0.3
-0.4
TIME (1 ns/DIV)
Figure 38.
-0.4
TIME (1 ns/DIV)
Figure 39.
Step Response
0.4
HI to LO
0.3
LO to HI
0.2
Input
0.1
0
Output
Input = 0.2V/DIV
LG, 20 dB
-0.1
LO to HI
-0.2
HI to LO
-0.3
-0.4
TIME (1 ns/DIV)
Figure 40.
Step Response
0.4
0.3 HI to LO
LO to HI
0.2
0.1
Input
Input = 2 mV/DIV
HG, 0 dB
0
Output
-0.1
LO to HI
-0.2
HI to LO
-0.3
-0.4
TIME (1 ns/DIV)
Figure 41.
Output Offset Voltage (Typical Unit 1)
20
15
10
LG
-40°C
5
0
HG
85°C _25°C
-5
-10
-15
-20
0
4
8
12
16
20
LADDER ATTENUATION (dB)
Figure 42.
Output Offset Voltage (Typical Unit 2)
20
15
10
5
0
25°C
85°C
HG
-5
-10
-15
-20
0
LG
-40°C
4
8
12
16
20
LADDER ATTENUATION (dB)
Figure 43.
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