LMH6518_15 Datasheet, PDF (3/41 Pages) Texas Instruments – LMH6518 900 MHz, Digitally Controlled, Variable Gain Amplifier

LMH6518
www.ti.com
SNOSB21C – MAY 2008 – REVISED JULY 2013
Electrical Characteristics ⁽¹⁾ (continued)
Unless otherwise specified, all limits are ensured for T_A = 25°C, 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 & Auxiliary Outputs), both Main and Auxiliary Output Specifications, full bandwidth setting, gain = 18.8 dB (Preamp LG,
0 dB ladder attenuation), Full Power setting ⁽²⁾. Electrical Characteristics Definition of Terms and Specifications for
abbreviations used in the datasheet. Boldface limits apply at the temperature extremes.
Symbol
Parameter
Condition
Min⁽³⁾ Typ⁽⁴⁾ Max⁽³⁾ Units
Dynamic Performance
LSBW
−3 dB Bandwidth
All Gains
900
MHz
Peaking
Peaking
All Gains
1
dB
GF_0.1 dB
±0.1 dB Gain Flatness
All Gains
150
MHz
GF_1 dB
±1 dB Gain Flatness
All Gains
400
MHz
TRS
TRL
Rise Time
Fall Time
460
ps
450
OS
Overshoot
Main Output
9
%
t_{s_1}
t_{s_2}
t_recover
Settling Time
Recovery Time⁽⁵⁾
Main Output, ±0.5%
Main Output, ±0.05%
All Gains
10
ns
14
<5
ns
P_D
Propagation Delay
P_{D_VAR}
Propagation Delay Variation
Noise, Distortion, and RF Specifications
V_OUT = 0.7 V_PP, All Gains
Gain Varied
1.2
ns
100
ps
e_{n_1}
Input Noise Spectral Density
Max Gain, 10 MHz
e_{n_2}
Preamp LG and 0 dB Ladder,
10 MHz
0.98
nV/√Hz
4.1
e_{no_1}
e_{no_2}
RMS Output Noise
Max Gain, 100 Hz to 400 MHz
Preamp LG, 0 dB Ladder, 100 Hz
to 400 MHz
1.7
mV
940
μV
NF_1
NF_2
Noise Figure
Max Gain, R_S = 50Ω each Input,
3.8
10 MHz
dB
Preamp LG, 0 dB Ladder, R_S = 50Ω
13.5
each Input, 10 MHz
HD2/ HD3_1
2^nd/ 3^rd Harmonic Distortion⁽⁶⁾
Main Output, 100 MHz, All Gains
−50/ −53
HD2/ HD3_2
HD2/ HD3_3
Auxiliary Output, 100 MHz, All Gains
−48/ −50
dBc
Main Output, 250 MHz, All Gains
−44/ −50
HD2/ HD3_4
IMD3
OIP3_1
Intermodulation Distortion ⁽⁶⁾
Intermodulation Intercept ⁽⁶⁾
Auxiliary Output, 250 MHz, All Gains
f = 250 MHz, Main output
Main Output, 250 MHz
−42/ −42
−65
26
dBc
dBm
P_1dB_main −1 dB Compression
Main Output, 250 MHz, 0 dB Ladder
1.8
Main Output, 250 MHz, 20 dB Ladder
1.0
P_1dB_aux
Auxiliary Output, 250 MHz,
0 dB Ladder
1.65
V_PP
Auxiliary Output, 250 MHz,
1.0
20 dB Ladder
Gain Parameters
A_{V_DIFF_MAX}
A_{V_DIFF_MIN}
Max Gain
Min Gain
38.1
38.8
39.5
dB
−1.91 −1.16 −0.40 dB
(3) Limits are 100% production tested at 25°C unless otherwise specified. Limits over the operating temperature range are ensured through
correlation using Statistical Quality Control (SQC) methods.
(4) Typical values represent the most likely parametric norm as determined at the time of characterization. Actual typical values may vary
over time and will also depend on the application and configuration. The typical values are not tested and are not ensured on shipped
production material.
(5) Recovery time” is the slower of the Main and Auxiliary outputs. Output swing of 700 mV_PP shifted up or down by 50% (0.35V) by
introducing an offset. Measured values correspond to the time it takes to return to within ±1% of 0.7 V_PP (±7 mV).
(6) Distortion data taken under single ended input condition.
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