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参数资料
| 型号： | AD8348XXX |
| 厂商： | ANALOG DEVICES INC |
| 元件分类： | 无绳电话/电话 |
| 英文描述： | 50-1000 MHz Quadrature Demodulator |
| 中文描述： | TELECOM, CELLULAR, RF AND BASEBAND CIRCUIT, PDSO28 |
| 封装： | TSSOP-28 |
| 文件页数： | 1/13页 |
| 文件大小： | 778K |
| 代理商： | AD8348XXX |
PRELIMINARY TECHNICAL DATA
a
Preliminary Technical Data
AD8348
Rev. PrF 2/11/03
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its use;
nor for any infringements of patents or other rights of third parties which may
result from its use. No license is granted by implication or otherwise under
any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106 U.S.A.
Tel: 781/329-4700 World Wide Web Site: http://www.analog.com
Fax: 781/326-8703 Analog Devices, Inc., 200
3
50–1000 MHz
Quadrature Demodulator
Features
Integrated I/Q demodulator with IF VGA Amplifier
Operating IF Frequency 50–1000 MHz
(3dB IF BW of 500MHz driven from Rs=200ohms)
Demodulation Bandwidth 60MHz
Linear-in-dB AGC Range 45dB
Third Order Intercept
IIP3 +26 dBm @ min gain (FIF=450MHz)
IIP3 -7 dBm @ max gain (FIF=450MHz)
Quadrature Demodulation Accuracy
Phase Accuracy 0.6
RMS
Amplitude Balance 0.3 dB
Noise Figure 12.5dB @ max gain (FIF=500MHz)
LO Input -10 dBm
Single Supply 2.7-5.5V
Power down mode
Compact 28-pin TSSOP package
Applications
QAM/QPSK Demodulator
W-CDMA/CDMA/GSM/NADC
Wireless Local Loop
LMDS/MMDS
General Description
The AD8348 is a broadband quadrature demodulator with an
integrated intermediate frequency (IF) variable-gain amplifier
(VGA) and integrated baseband amplifiers. It is suitable for
use in communications receivers, performing quadrature
demodulation from IF directly to baseband frequencies. The
baseband amplifiers have been designed to directly interface
with dual channel A-to-D converters such as the AD9201,
AD9283, and AD9218 for digitizing and post-processing.
The IF input signal is fed into two Gilbert-cell mixers through
an X-AMP VGA. The IF VGA provides 45dB of gain
control. A precision gain-control circuit sets a linear-in-dB
gain characteristic for the VGA and provides temperature
compensation. The LO quadrature phase splitter employs a
divide-by-two frequency divider to achieve high quadrature
accuracy and amplitude balance over the entire operating fre-
quency range.
Optionally, the IF VGA can be disabled and bypassed. In this
mode, the IF signal is applied directly to the quadrature mixer
inputs via pins MXIP and MXIN.
Functional Block Diagram
Separate I & Q-channel baseband amplifiers follow the
baseband outputs of the mixers. The DC common-mode
voltage level at the baseband outputs is set by the voltage
applied to the VCMO pin. Typically VCMO is connected to
the internal VREF voltage but it can also be connected to an
external voltage. This flexibility allows the user to maximize
the input dynamic range to the A-to-D converter. Connecting
a bypass capacitor at each offset compensation input (IOFS &
QOFS) nulls DC offsets produced in the mixer. Offset
compensation can be overridden by applying an external
voltage at the offset compensation inputs.
The mixers’ outputs are brought off-chip for optional filtering
before final amplification. Inserting a channel selection filter
before each baseband amplifier increases the baseband
amplifiers’ signal handling range by reducing the amplitude of
high-level, out-of-channel interferers before the baseband
signal is fed into the baseband amplifiers. The single-ended
mixer output is amplified and converted to a differential signal
for driving ADCs.
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相关代理商/技术参数 |
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|---|---|
| AD8349 | 制造商:AD 制造商全称:Analog Devices 功能描述:400 MHz to 6 GHz Broadband Quadrature Modulator |
| 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 类别:RF/IF 和 RFID >> RF 调制器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 功能:调制器 LO 频率:700MHz ~ 2.3GHz RF 频率:700MHz ~ 2.3GHz P1dB:1dBm 底噪:-148dBm/Hz 输出功率:-1dBm 电流 - 电源:46mA 电源电压:2.7 V ~ 3.6 V 测试频率:1.75GHz 封装/外壳:28-WFQFN 裸露焊盘 包装:带卷 (TR) |
| AD8349AREZ | 功能描述:IC QUADRATURE MOD 700MHZ 16TSSOP RoHS:是 类别:RF/IF 和 RFID >> RF 调制器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 功能:调制器 LO 频率:700MHz ~ 2.3GHz RF 频率:700MHz ~ 2.3GHz P1dB:1dBm 底噪:-148dBm/Hz 输出功率:-1dBm 电流 - 电源:46mA 电源电压:2.7 V ~ 3.6 V 测试频率:1.75GHz 封装/外壳:28-WFQFN 裸露焊盘 包装:带卷 (TR) |
| AD8349AREZ-RL7 | 功能描述:IC MOD QUAD 2.7GHZ 16TSSOP RoHS:是 类别:RF/IF 和 RFID >> RF 调制器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 功能:调制器 LO 频率:700MHz ~ 2.3GHz RF 频率:700MHz ~ 2.3GHz P1dB:1dBm 底噪:-148dBm/Hz 输出功率:-1dBm 电流 - 电源:46mA 电源电压:2.7 V ~ 3.6 V 测试频率:1.75GHz 封装/外壳:28-WFQFN 裸露焊盘 包装:带卷 (TR) |
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