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参数资料
| 型号： | MAX9987ETP+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 9/12页 |
| 文件大小： | 0K |
| 描述： | IC BUFFER/SPLITTER LO 20-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 60 |
| 功能： | LO 缓冲器/分路器 |
| 频率： | 700MHz ~ 1.1GHz |
| RF 型： | 手机，GSM，DCS，PCS，UMTS |
| 次要属性： | 40dB 反向隔离 |
| 封装/外壳： | 20-WQFN 裸露焊盘 |
| 包装： | 管件 |
+14dBm to +20dBm LO Buffers/Splitters
with ±1dB Variation
Pin Description
PIN
1, 4, 8, 9, 13,
17, 18, EP
2
3
5
6
7
10
11, 12
14, 15
16
19
20
NAME
GND
IN
VCCREF
REF
BIASIN
BIASOUT
OUT2
VCC3
VCC2
OUT1
VCC1
OUTPLL
FUNCTION
Ground
Input. Internally matched 50 ? RF input. AC couple to this pin.
Supply. Supply connection for on-chip voltage and current references. See Applications Information
for information on decoupling.
Voltage Reference Output. Output for on-chip 1.5V bandgap voltage reference. See
Applications Information section for information on decoupling.
Bias Connection for Input Buffer. Set compressed power point for input amplifier with a resistor to
REF or GND. For +17dBm output power, no external biasing resistors are required. See Applications
Information section for information.
Bias Connection for Output Amplifiers. Set compressed power point for OUT1 and OUT2 with a
resistor to REF or ground. For +17dBm output power, no external biasing resistors are required. See
Applications Information section for information.
Output 2. Internally matched 50 ? RF output. AC couple to this pin.
Supply. Supply connection for OUT2.
Supply. Supply connection for OUT1.
Output 1. Internally matched 50 ? RF output. AC couple to this pin.
Supply. Supply connection for input amplifier.
Output PLL. Output for driving optional external PLL.
Detailed Description
The MAX9987/MAX9988 LO amplifiers/splitters each
consist of a single input amplifier, a two-way passive
power splitter, two separate output amplifiers, as well as
a third buffer amplifier to drive the LO’s PLL. The bias
currents for the amplifiers are adjustable through off-chip
resistors. This allows the output level to be precision set
anywhere from +14dBm to +20dBm. The PLL output is
preset to +3dBm (about 900mV P-P into 50 ? ).
Power levels are typically ±1dB over the full supply, input
power, frequency, and temperature range. Precision
power control is achieved by internal control circuitry.
Maintaining tight power control keeps the system engi-
neer from over specifying the LO drive in order to guar-
antee a linearity specification in the base-station mixer.
More than 40dB isolation between the LO outputs and
the input prevents VCO pulling, and the 30dB output-
to-output isolation reduces branch-to-branch coupling.
The MAX9987 is specified from 700MHz to 1100MHz,
and the MAX9988 is specified from 1500MHz to
2200MHz. Both are offered in compact 5mm ? 5mm 20-
pin QFN packages with exposed paddle.
Input Amplifier
A single low-noise input amplifier before the passive
splitter provides gain and isolation. The compressed
output power for this stage is controlled by the bias set-
ting resistors R 1 or R 4 (see Typical Application Circuit ).
These resistors are not required for the nominal +17dBm
output; see Table 1 for bias resistor values to obtain
+14dBm to +20dBm output power.
The input is internally matched to 50 ? , and typical
VSWR is no more than 2:1 over all operating conditions.
Since the input is internally biased, provide a DC block
at the input pin.
PLL Amplifier and Output
A small amount of power is tapped off from the input
amplifier’s output, and fed to a high-isolation buffer to
drive the PLL output at +3dBm. If the PLL output is not
required, it can be disabled by removing R 3 ; disabling
the PLL output saves 12mA supply current.
Passive Two-Way Splitter
The input amplifier drives an integrated power splitter.
All impedance matching between stages is on-chip, so
no external tuning components are required.
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相关PDF资料 |
PDF描述 |
|---|---|
| MAX9988EVKIT | EVAL KIT FOR MAX9988 |
| MAX9989ETP+T | IC BUFFER LO 20-TQFN |
| MAX9990EVKIT | EVAL KIT FOR MAX9990 |
| MAX9993ETP+D | IC MIXER DOWN CONV 20-TQFN |
| MAX9993EVKIT | EVAL KIT FOR MAX9993 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX9987ETP+ | 功能描述:射频放大器 14dBm to 20dBm LO Buffer/Splitter RoHS:否 制造商:Skyworks Solutions, Inc. 类型:Low Noise Amplifier 工作频率:2.3 GHz to 2.8 GHz P1dB:18.5 dBm 输出截获点:37.5 dBm 功率增益类型:32 dB 噪声系数:0.85 dB 工作电源电压:5 V 电源电流:125 mA 测试频率:2.6 GHz 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-16 封装:Reel |
| MAX9987ETP+T | 功能描述:射频放大器 14dBm to 20dBm LO Buffer/Splitter RoHS:否 制造商:Skyworks Solutions, Inc. 类型:Low Noise Amplifier 工作频率:2.3 GHz to 2.8 GHz P1dB:18.5 dBm 输出截获点:37.5 dBm 功率增益类型:32 dB 噪声系数:0.85 dB 工作电源电压:5 V 电源电流:125 mA 测试频率:2.6 GHz 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-16 封装:Reel |
| MAX9987ETP-T | 功能描述:射频放大器 14dBm to 20dBm LO Buffer/Splitter RoHS:否 制造商:Skyworks Solutions, Inc. 类型:Low Noise Amplifier 工作频率:2.3 GHz to 2.8 GHz P1dB:18.5 dBm 输出截获点:37.5 dBm 功率增益类型:32 dB 噪声系数:0.85 dB 工作电源电压:5 V 电源电流:125 mA 测试频率:2.6 GHz 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-16 封装:Reel |
| MAX9987EVKIT | 功能描述:射频放大器 RoHS:否 制造商:Skyworks Solutions, Inc. 类型:Low Noise Amplifier 工作频率:2.3 GHz to 2.8 GHz P1dB:18.5 dBm 输出截获点:37.5 dBm 功率增益类型:32 dB 噪声系数:0.85 dB 工作电源电压:5 V 电源电流:125 mA 测试频率:2.6 GHz 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-16 封装:Reel |
| MAX9988EGP-T | 制造商:Maxim Integrated Products 功能描述:14DBM TO 20DBM LO BUFFER/SPLITTER WITH +/-1DB - Tape and Reel |
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