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參數資料
| 型號： | AD8346-EVAL |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 0.8 GHz-2.5 GHz Quadrature Modulator |
| 中文描述： | 0.8千兆赫，2.5 GHz的正交調制器 |
| 文件頁數： | 11/12頁 |
| 文件大小： | 190K |
| 代理商： | AD8346-EVAL |
REV. 0
AD8346
–11–
CHARACTERIZATION SETUPS
SSB Setup
Two main setups were used to characterize this product. These
setups are shown below in Figures 27 and 29. Figure 27 shows
the setup used to evaluate the product as a Single Sideband modu-
lator. The AD8346 Motherboard had circuitry that converted
the single-ended I and Q inputs from the arbitrary function
generator to differential inputs with a dc bias of approximately
1.2 V. In addition, the Motherboard also provided connections
for power supply routing. The HP34970A and its associated
plug-in 34901 were used to monitor power supply currents and
voltages being supplied to the AD8346 Evaluation Board (a full
schematic of the AD8346 Evaluation Board can be found in
Figure 25). The 2 HP34907 plug-ins were used to provide addi-
tional miscellaneous dc and control signals to the Motherboard.
The LO was driven by an RF signal generator (through the
balun on the evaluation board to present a differential LO signal
to the device) and the output was measured with a spectrum
analyzer. With the I channel driven with a sine wave and the Q
channel driven with a cosine wave, the lower sideband is the
single sideband output. The typical SSB output spectrum is
shown below in Figure 28.
CDMA Setup
For evaluating the AD8346 with CDMA waveforms the setup
shown in Figure 29 was used. This is essentially the same as that
used for the single sideband characterization except the AFG2020
was replaced with the AWG2021 for providing the I and Q
input signals, and the spectrum analyzer used to monitor the
output was changed to an FSEA30 Rohde-Schwarz analyzer
with vector demodulation capability. The I/Q input signals for
these measurements were IS95 baseband signals generated with
Tektronix I/Q SIM software and downloaded to the AWG2021.
For measuring ACPR the I/Q input signals used were generated
with Pilot (Walsh Code 00), Sync (WC 32), Paging (WC 01),
and 6 Traffic (WC 08, 09, 10, 11, 12, 13) channels active. The
I/Q SIM software was set for 32
×
oversampling and was using a
BS equifilter. Figure 30 shows the typical output spectrum for
this configuration. The ACPR was measured 885 kHz away
from the carrier frequency.
For performing EVM, Rho, phase, and amplitude balance mea-
surements the I/Q input signals used were generated with only
the Pilot Channel (Walsh Code 00) active. The I/Q SIM soft-
ware was set for 32
×
oversampling and was using a CDMA
equifilter.
VPS1
VN
GND
VP
P1
AD8346
MOTHERBOARD
I IN
Q IN
D1
D2
D3
IN
IP
QP
QN
IEEE
34901
34907 34907
D1
D2
D3
HP34970A
AD8346
EVAL BOARD
P1
IN
IP
QP
QN
LO
ENBL
VOUT
RFOUT
IEEE
HP8648C
+15V MAX
COM
+25V MAX
–25V MAX
IEEE
HP3631
IEEE
PC CONTROLLER
HP8593E
RF I/P
CAL OUT
SPECTRUM
ANALYZER
28VOLT
IEEE
SWEEP OUT
OUTPUT 1
OUTPUT 2
IEEE
TEKAFG2020
ARB FUNC. GEN
Figure 27. Evaluation Board SSB Test Setup
0
CENTER 1.9GHz
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
50kHz/
SPAN 500kHz
Figure 28. Typical SSB Output Spectrum
VPS1
VN
GND
VP
P1
AD8346
MOTHERBOARD
I IN
Q IN
D1
D2
D3
IN
IP
QP
QN
IEEE
34901
34907 34907
D1
D2
D3
HP34970A
AD8346
EVAL BOARD
P1
IN
IP
QP
QN
LO
ENBL
VOUT
RFOUT
IEEE
HP8648C
+15V MAX
COM
+25V MAX
–25V MAX
IEEE
HP3631
IEEE
PC CONTROLLER
FSEA30
RF I/P
IEEE
SPECTRUM
ANALYZER
OUTPUT 1
OUTPUT 2
IEEE
TEKAFG2020
ARB FUNC. GEN
Figure 29. Evaluation Board CDMA Test Setup
–20
CENTER 1.9GHz
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
187.5kHz/
SPAN 1.875MHz
CH PWR = –20.7dBm
ACP UPR = –71.8dBc
ACP LWR = –71.7dBc
Figure 30. Typical CDMA Output Spectrum
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相關代理商/技術參數 |
參數描述 |
|---|---|
| AD8346-EVALZ | 制造商:Analog Devices 功能描述:- Bulk |
| AD8347 | 制造商:AD 制造商全稱:Analog Devices 功能描述:0.8 GHz-2.7 GHz Direct Conversion Quadrature Demodulator |
| AD8347ARU | 功能描述:IC QUADRATURE DEMOD 28-TSSOP RoHS:否 類別:RF/IF 和 RFID >> RF 解調器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 功能:解調器 LO 頻率:- RF 頻率:70MHz ~ 300MHz P1dB:-9dBm 增益:- 噪音數據:6.36dB 電流 - 電源:41.5mA 電源電壓:2.7 V 封裝/外殼:28-WFQFN 裸露焊盤 供應商設備封裝:28-TQFN-EP（5x5） 包裝:帶卷 (TR) |
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