LMH6401_16 Datasheet, PDF (16/48 Pages) Texas Instruments – LMH6401 DC to 4.5 GHz, Fully-Differential, Digital Variable-Gain Amplifier

LMH6401
SBOS730A – APRIL 2015 – REVISED MAY 2015
8 Parameter Measurement Information
8.1 Setup Diagrams
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LMH6401EVM
VS+
Vector Network
Analyzer
50 _{Port 1}
50 ^{Port 3}
LMH6401
INP
INM
Vector Network
PD
Analyzer
10
OUTP ⁴⁰
+
-
OUT_AMP
10
OUTM ₄₀
Port 2
+
-
OUT_LOAD
Port 4
50
50
Test Equipment
with 50-Ÿ,QSXWV, Outputs
SPI
VS-
USB
GND
VOCM
Test Equipment
with 50-Ÿ,QSXWV, Outputs
Figure 43. Frequency Response Differential Test Setup
50
Signal Generator
with 50-Ÿ2XWSXWV
LMH6401EVM
VS+
Band-Pass
Filter
ZO = 50 Ÿ, 1:2
0º
180º
6-dB Pads
DC Block
6-dB Pads
BAL-0010
LMH6401
INP
INM
PD
10
OUTP ⁴⁰
+
-
OUT_AMP
10
OUTM ₄₀
VOCM
SPI
VS-
USB
GND
2:1, ZO = 50 Ÿ
6-dB Pads
0º
180º
BAL-0010
Figure 44. Single-Tone Harmonic Distortion Test Setup
50
Spectrum Analyzer
with 50-Ÿ,QSXWV
50
Signal Generator
with 50-Ÿ2XWSXWV
6-dB _Band-Pass
Attenuation
Pads
Filter
BAL-0010
50
Signal Generator
with 50-Ÿ2XWSXWV
LMH6401EVM
VS+
ZO = 50 Ÿ, 1:2
0º
180º
DC Block
BAL-0010
LMH6401
INP
INM
PD
10
OUTP ⁴⁰
+
-
OUT_AMP
10
OUTM ₄₀
SPI
VS-
USB
GND
VOCM
2:1, ZO = 50 Ÿ
6-dB Pads
0º
180º
BAL-0010
Figure 45. Two-Tone Linearity Test Setup (OIP3, OIP2)
50
Spectrum Analyzer
with 50-Ÿ,QSXWV
16
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