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參數資料
| 型號： | AD8349 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 700 MHz to 2700 MHz Quadrature Modulator |
| 中文描述： | 700兆赫至2700 MHz正交調制器 |
| 文件頁數： | 17/28頁 |
| 文件大小： | 969K |
| 代理商： | AD8349 |
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AD8349
Rev. 0 | Page 17 of 28
0
–1
0
LO FREQUENCY (MHz)
S
–44
–43
–42
–41
–40
S
USB
SSB
–8
–7
–6
–5
–4
–3
–2
–45
–46
–48
–47
2700
2750
2800
2850
2900
2950
3000
Figure 46. Sideband Suppression above 2700 MHz
SINGLE-ENDED LO DRIVE
The LO input can be driven single-ended at the expense of
higher LO feedthrough at most frequencies (see Figure 48).
LOIN is ac-coupled to ground, and LOIP is driven through a
coupling capacitor from a single-ended 50 source (see Figure
47).
A 400 shunt resistor on the signal-source side of the ac
coupling capacitor was used for the measurement.
AD8349
LOIN
LOIP
5
6
LO
100pF
400
100pF
0
Figure 47. Schematic for Single-Ended LO Drive
–60
–55
–50
–45
–40
–35
–30
–25
–20
–15
–10
C
700
900
1100 1300 1500 1700 1900 2100 2300 2500 2700
LO FREQUENCY (MHz)
SINGLE-ENDED LO DRIVE
DIFFERENTIAL LO DRIVE
0
Figure 48. LO Feedthrough vs. Frequency, Single-Ended vs. Differential LO
Drive (Single-Sideband Modulation)
RF OUTPUT
The RF output is designed to drive a 50 load, but should be
ac-coupled, as shown in Figure 43, because of internal dc
biasing. The RF output impedance is close to 50 and provides
fairly good return loss over the specified operating frequency
range (see Figure 24). As a result, no additional matching
circuitry is required if the output is driving a 50 load. The
output power of the AD8349 under nominal conditions
(1.2
V
p-p differential baseband drive, 400 mV dc baseband
bias, and a 5 V supply) is shown in Figure 7.
OUTPUT ENABLE
The ENOP pin can be used to turn the RF output on and off.
This pin should be held high (greater than 2 V) for normal
operation. Taking ENOP low (less than 800 mV) disables the
output power and provides an off-isolation level of < –50 dBm
at the output.
Figure 49 and Figure 50 show the enable and disable time
domain responses of the ENOP function at 900 MHz. Typical
enable and disable times are approximately 20 ns and 50 ns,
respectively.
0
–8
–4
–2
–6
0
V
E
4
2
8
6
–800
–400
–200
–600
0
V
V
400
200
800
600
TIME (ns)
0
20
100
40
60
80
Figure 49. ENOP Enable Time, 900 MHz
0
–8
–4
–2
–6
0
V
E
4
2
8
6
–800
–400
–200
–600
0
V
V
400
200
800
600
TIME (ns)
0
20
100
40
60
80
Figure 50. ENOP Disable Time, 900 MHz.
相關PDF資料 |
PDF描述 |
|---|---|
| AD8349ARE | 700 MHz to 2700 MHz Quadrature Modulator |
| AD8349ARE-REEL7 | 700 MHz to 2700 MHz Quadrature Modulator |
| AD8350 | Low Distortion 1.0 GHz Differential Amplifier |
| AD8350AR15 | Low Distortion 1.0 GHz Differential Amplifier |
| AD8350AR15-EVAL | Low Distortion 1.0 GHz Differential Amplifier |
相關代理商/技術參數 |
參數描述 |
|---|---|
| AD8349ARE | 制造商:Analog Devices 功能描述:Quadrature Mod 160MHz 16-Pin TSSOP EP Tube 制造商:Rochester Electronics LLC 功能描述:DIRECT QUADRATURE MODULATOR - Bulk 制造商:Analog Devices 功能描述:IC MODULATOR QUADRATURE |
| AD8349ARE-REEL7 | 功能描述:IC QUADRATURE MOD 700MHZ 16TSSOP RoHS:否 類別:RF/IF 和 RFID >> RF 調制器 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:調制器 LO 頻率:700MHz ~ 2.3GHz RF 頻率:700MHz ~ 2.3GHz P1dB:1dBm 底噪:-148dBm/Hz 輸出功率:-1dBm 電流 - 電源:46mA 電源電壓:2.7 V ~ 3.6 V 測試頻率:1.75GHz 封裝/外殼:28-WFQFN 裸露焊盤 包裝:帶卷 (TR) |
| AD8349AREZ | 功能描述:IC QUADRATURE MOD 700MHZ 16TSSOP RoHS:是 類別:RF/IF 和 RFID >> RF 調制器 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:調制器 LO 頻率:700MHz ~ 2.3GHz RF 頻率:700MHz ~ 2.3GHz P1dB:1dBm 底噪:-148dBm/Hz 輸出功率:-1dBm 電流 - 電源:46mA 電源電壓:2.7 V ~ 3.6 V 測試頻率:1.75GHz 封裝/外殼:28-WFQFN 裸露焊盤 包裝:帶卷 (TR) |
| AD8349AREZ-RL7 | 功能描述:IC MOD QUAD 2.7GHZ 16TSSOP RoHS:是 類別:RF/IF 和 RFID >> RF 調制器 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:調制器 LO 頻率:700MHz ~ 2.3GHz RF 頻率:700MHz ~ 2.3GHz P1dB:1dBm 底噪:-148dBm/Hz 輸出功率:-1dBm 電流 - 電源:46mA 電源電壓:2.7 V ~ 3.6 V 測試頻率:1.75GHz 封裝/外殼:28-WFQFN 裸露焊盤 包裝:帶卷 (TR) |
| AD8349EVAL | 制造商:Analog Devices 功能描述:IC ((NS)) |
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