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LMH6518 bảng dữ liệu(HTML) 4 Page - Texas Instruments

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LMH6518
SNOSB21A – MAY 2008 – REVISED OCTOBER 2008
www.ti.com
Electrical Characteristics
(1) (continued)
Unless otherwise specified, all limits are guaranteed for TA = 25°C, Input CM = 2.5V, VCM = 1.2V, VCM_Aux = 1.2V, Single-
ended input drive, VCC = 5V, VDD = 3.3V, RL = 100Ω differential (both Main & Auxiliary Outputs), VOUT = 0.7 VPP 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
NF_1
Noise Figure
Max Gain, RS = 50Ω each Input,
3.8
10 MHz
dB
NF_2
Preamp LG, 0 dB Ladder, RS = 50Ω
13.5
each Input, 10 MHz
HD2/ HD3_1
2nd/ 3rd Harmonic Distortion(6)
Main Output, 100 MHz, All Gains
−50/ −53
HD2/ HD3_2
Auxiliary Output, 100 MHz, All Gains
−48/ −50
dBc
HD2/ HD3_3
Main Output, 250 MHz, All Gains
−44/ −50
HD2/ HD3_4
Auxiliary Output, 250 MHz, All Gains
−42/ −42
IMD3
Intermodulation Distortion (6)
f = 250 MHz, Main output
−65
dBc
OIP3_1
Intermodulation Intercept (6)
Main Output, 250 MHz
26
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,
1.65
VPP
0 dB Ladder
Auxiliary Output, 250 MHz,
1.0
20 dB Ladder
Gain Parameters
AV_DIFF_MAX
Max Gain
38.1
38.8
39.5
dB
AV_DIFF_MIN
Min Gain
−1.91
−1.16
−0.40
dB
Gain_Step
Gain Step Size
All Gains including Preamp Step
1.8
2
2.2
dB
Gain
Step
Size
with
ADC(See ADC FS Adjusted
8.5
mdB
Applications Information)
Gain_Range
Gain Range
39
40
41
dB
TC_AV_DIFF
Gain Temp Coefficient (7)
All Gains
−0.8
mdB/°C
Gain_ACC
Absolute Gain Accuracy
Compared to theoretical from
0.75
+0.75
dB
Max Gain in 2 dB steps
Matching
Gain_match
Gain Matching Main/Auxiliary
All Gains
±0.1
±0.2
dB
BW_match
−3 dB Bandwidth Matching
All Gains
5
%
Main/Auxiliary
RT_match
Rise Time Matching Main/ Auxiliary
All Gains
5
%
PD_match
Propagation Delay Matching
All Gains
100
ps
Main/Auxiliary
Analog I/O
CMRR_1
CM Rejection Ratio (see Table 1)
Preamp HG, 0 dB Ladder, 1.9V <
45
86
CMVR < 3.1V
dB
CMRR_2
Preamp LG, 0 dB Ladder, 1.9V <
40
55
CMVR < 3.1V
CMVR_1
Input Common Mode Voltage Range
Preamp HG, All Ladder Steps, CMRR
1.9
3.1
≥ 45 dB
V
CMVR_2
Preamp LG, All Ladder Steps, CMRR
1.9
3.1
≥ 40 dB
|
ΔVO_CMI_CM|
All Gains, 2V < CMVR < 3V
−60
−100
dB
CMRR_CM
CM Rejection Ratio relative to VCM (see Preamp LG, 0 dB
101
dB
Table 1)
(6)
Distortion data taken under single ended input condition.
(7)
Drift determined by dividing the change in parameter at temperature extremes by the total temperature change.
4
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