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| 型号： | MAX2411AEEI+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 9/14页 |
| 文件大小： | 0K |
| 描述： | IC UP/DOWNCONVERTER 28-QSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| 功能： | 升/降频器，LNA，PA 驱动器 |
| 频率： | 1.9GHz |
| RF 型： | DCS1800/PCS1900，DECT，ISM，PHS/PACS，PWT1900 |
| 次要属性： | 3.2dB 组合接收器噪声系数 |
| 封装/外壳： | 28-QSOP |
| 包装： | 管件 |
Low-Cost RF Up/Downconverter
with LNA and PA Driver
_________________________________________________Pin Description (continued)
PIN
24
25
26
27
NAME
RXMXIN
GND
GND
LNAOUT
FUNCTION
RF Input to Receive Mixer (downconverter). This input typically requires a matching network for
connecting to an external filter. AC couple to this pin. See the Typical Operating Characteristics
for a plot of RXMXIN Impedance vs. Frequency.
Receive Mixer Input Ground. Connect GND to the PC board ground plane with minimal inductance.
LNA Output Ground. Connect GND to the PC board ground plane with minimal inductance.
LNA Output. AC couple to this pin. This output typically provides a VSWR of better than 2:1 at fre-
quencies from 1.7GHz to 3GHz with no external matching components. At other frequencies, a
matching network may be required to match LNAOUT to an external filter. Consult the Typical
Operating Characteristics for a plot of LNA Output Impedance vs. Frequency.
_______________Detailed Description
The MAX2411A consists of five major components: a
transmit mixer followed by a variable-gain power-
amplifier (PA) driver as well as a low-noise amplifier
(LNA), receive mixer, and power-management section.
The following sections describe each of the blocks in
the MAX2411A Functional Diagram.
Low-Noise Amplifier (LNA)
The LNA is a wideband, single-ended cascode amplifi-
er that can be used over a wide range of frequencies.
Refer to the LNA Gain vs. Frequency graph in the
Typical Operating Characteristics. Its port impedances
are optimized for operation around 1.9GHz, requiring
only a 1pF shunt capacitor at the LNA input for a VSWR
of better than 2:1 and a noise figure of 2.4dB. As with
every LNA, the input match can be traded off for better
noise figure.
PA Driver
The PA driver has typically 15dB of gain, which is
adjustable over a 35dB range via the GC pin. At full gain,
the PA driver has a noise figure of 3.5dB at 1.9GHz.
For input and output matching information, refer to the
Typical Operating Characteristics for plots of PA Driver
Input and Output Impedance vs. Frequency.
Bidirectional IF Port
The MAX2411A has a unique bidirectional differential IF
port, which can eliminate the need for separate transmit
and receive IF filters, reducing cost and component count.
Consult the Typical Operating Circuit for more information.
For single-ended operation, connect the unused IF port to
V CC and bypass with a 1000pF capacitor to GND.
In receive mode, the IF and IF pins are open-collector
outputs that need external inductive pull-ups to V CC for
proper operation. These inductors are typically used as
part of an IF matching network.
In transmit mode, IF and IF are high-impedance inputs
that are internally AC coupled to the transmit mixer.
This internal AC coupling prevents the DC bias voltage
required for the receive mixer outputs from reaching
the transmit mixer inputs.
Receive Mixer
The receive mixer is a wideband, double-balanced
design with excellent noise figure and linearity. Inputs to
the mixer are the RF signal at the RXMXIN pin and the
LO inputs at LO and LO . The downconverted output sig-
nal appears at the IF port. For more information, see the
Bidirectional IF Port section. The conversion gain of the
receive mixer is typically 9.4dB with a 9.2dB noise figure.
RF Input
The RXMXIN input is typically connected to the LNA out-
put through an off-chip filter. This input is externally
matched to 50 ? . See the Typical Operating Circuit for an
example matching network and the Receive Mixer Input
Impedance vs. Frequency graph in the Typical Operating
Characteristics.
Local-Oscillator Inputs
The LO and LO pins are internally terminated with 50 ?
on-chip resistors. AC couple the local-oscillator signal
to these pins. If a single-ended LO source is used, con-
nect LO directly to ground.
Transmit Mixer
The transmit mixer takes an IF signal at the IF port and
upconverts it to an RF frequency at the TXMXOUT pin.
For more information on the IF port, see the Bidirectional
IF Port section. The conversion gain is typically 8.5dB,
and the output 1dB compression point is typically
11.1dBm at 1.9GHz.
_______________________________________________________________________________________
9
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| MAX2411AEEI+ | 功能描述:上下转换器 RF Up/Down Cnvrtr w/LNA & PA Driver RoHS:否 制造商:Texas Instruments 产品:Down Converters 射频:52 MHz to 78 MHz 中频:300 MHz LO频率: 功率增益: P1dB: 工作电源电压:1.8 V, 3.3 V 工作电源电流:120 mA 最大功率耗散:1 W 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PQFP-128 |
| MAX2411AEEI+T | 功能描述:上下转换器 RF Up/Down Cnvrtr w/LNA & PA Driver RoHS:否 制造商:Texas Instruments 产品:Down Converters 射频:52 MHz to 78 MHz 中频:300 MHz LO频率: 功率增益: P1dB: 工作电源电压:1.8 V, 3.3 V 工作电源电流:120 mA 最大功率耗散:1 W 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PQFP-128 |
| MAX2411AEEI-T | 功能描述:上下转换器 RF Up/Down Cnvrtr w/LNA & PA Driver RoHS:否 制造商:Texas Instruments 产品:Down Converters 射频:52 MHz to 78 MHz 中频:300 MHz LO频率: 功率增益: P1dB: 工作电源电压:1.8 V, 3.3 V 工作电源电流:120 mA 最大功率耗散:1 W 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PQFP-128 |
| MAX2411AEVKIT | 功能描述:射频开发工具 MAX2411A Eval Kit RoHS:否 制造商:Taiyo Yuden 产品:Wireless Modules 类型:Wireless Audio 工具用于评估:WYSAAVDX7 频率: 工作电源电压:3.4 V to 5.5 V |
| MAX24188ETK+ | 功能描述:时钟发生器及支持产品 IEEE1588 Clock RoHS:否 制造商:Silicon Labs 类型:Clock Generators 最大输入频率:14.318 MHz 最大输出频率:166 MHz 输出端数量:16 占空比 - 最大:55 % 工作电源电压:3.3 V 工作电源电流:1 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-56 |
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