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LMH6521SQXNOPB bảng dữ liệu(PDF) 11 Page - Texas Instruments

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GAIN 0-5
200:
ADC
6
LATCH
RF
LO
½ LMH6521
VCC
0.01 PF
0.01 PF
0.01 PF
0.01 PF
40.2:
40.2:
1 PH
1 PH
ENABLE
0
100
200
300
400
500
-100
-50
0
50
100
150
200
250
FREQUENCY (MHz)
R
jX
|Z|
0
100
200
300
400
500
-40
-20
0
20
40
60
80
FREQUENCY (MHz)
R
jX
|Z|
-40
-20
0
20
40
60
80
100
200
210
220
230
240
250
TEMPERATURE (degrees)
Both Channels Enabled
Vs = 4.5V
Vs = 5.0V
Vs = 5.5V
0
100
200
300
400
500
600
-100
-90
-80
-70
-60
-50
-40
-30
FREQUENCY (MHz)
Ch A to Ch B
Ch B to Ch A
LMH6521
www.ti.com
SNOSB47C – MAY 2011 – REVISED SEPTEMBER 2011
Typical Performance Characteristics (continued)
V+ = 5V, Differential VOUT = 4V
PP, R
L = 200Ω, TA=25 °C, fin = 200 MHz, and Maximum Gain (0 Attenuation)
Supply Current
vs.
Temperature
Channel To Channel Isolation
Input Impedance
Output Impedance
Application Information
Figure 4. LMH6521 Typical Application
INTRODUCTION
The LMH6521 is a dual, digitally controlled variable gain amplifier designed for narrowband and wideband
intermediate frequency sampling applications. The LMH6521 is optimized for accurate 0.5 dB gain steps with
exceptional gain and phase matching between channels combined with low distortion products. Gain matching
error is less than ±0.05 dB and phase matching error less than ±0.5 degrees over the entire attenuation range.
This makes the LMH6521 ideal for driving analog-to-digital converters where high linearity is necessary. Figure 4
shows a typical application circuit.
The LMH6521 has been designed for AC coupled applications and has been optimized to operate at frequencies
greater than 3 MHz.
Copyright © 2011, Texas Instruments Incorporated
Submit Documentation Feedback
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Product Folder Links: LMH6521


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