- 您现在的位置：买卖IC网 > Datasheet目录471 > MAX19996AEVKIT# (Maxim Integrated)EVALUATION KIT FOR MAX19996A Datasheet资料下载
参数资料
| 型号： | MAX19996AEVKIT# |
| 厂商： | Maxim Integrated |
| 文件页数： | 31/35页 |
| 文件大小： | 0K |
| 描述： | EVALUATION KIT FOR MAX19996A |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 类型： | 混频器，降频 |
| 频率： | 1.7GHz ~ 2.2GHz |
| 适用于相关产品： | MAX19996A |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页当前第31页第32页第33页第34页第35页
SiGe, High-Linearity, 2000MHz to 3900MHz
Downconversion Mixer with LO Buffer
High-Linearity Mixer
The core of the MAX19996A is a double-balanced,
high-performance passive mixer. Exceptional linearity is
provided by the large LO swing from the on-chip LO
buffer. When combined with the integrated IF ampli-
fiers, IIP3, 2LO-2RF rejection, and noise-figure perfor-
mance are typically +24.5dBm, 67dBc, and 9.8dB,
respectively.
Differential IF Output Amplifier
The MAX19996A has an IF frequency range of 50MHz
to 500MHz, where the low-end frequency depends on
the frequency response of the external IF components.
The MAX19996A mixer is tuned for a 300MHz IF using
390nH external pullup bias inductors. Lower IF frequen-
cies would require higher inductor values to maintain a
good IF match. The differential, open-collector IF output
ports require these inductors to be connected to V CC .
Note that these differential ports are ideal for providing
enhanced 2LO-2RF and 2RF-2LO performance. Single-
ended IF applications require a 4:1 (impedance ratio)
balun to transform the 200 Ω differential IF impedance
to a 50 Ω single-ended system. Use the TC4-1W-17 4:1
transformer for IF frequencies above 200MHz and the
TC4-1W-7A 4:1 transformer for frequencies below
200MHz. The user can use a differential IF amplifier or
SAW filter on the mixer IF port, but a DC block is
required on both IF+/IF- ports to keep external DC from
entering the IF ports of the mixer.
Applications Information
Input and Output Matching
The RF input provides a 50 Ω match when combined
with a series DC-blocking capacitor. Use an 8.2pF
capacitor value for RF frequencies ranging from
2000MHz to 3000MHz. A 1.5pF capacitor value should
be used to match the RF port for the 3000MHz to
3900MHz band. The LO input is internally matched to
50 Ω ; use a 2pF DC-blocking capacitor to cover opera-
tions spanning the 2100MHz to 4000MHz LO range.
The IF output impedance is 200 Ω (differential). For
evaluation, an external low-loss 4:1 (impedance ratio)
balun transforms this impedance down to a 50 Ω single-
ended output (see the Typical Application Circuit).
Reduced-Power Mode
The MAX19996A has two pins (LOBIAS, IFBIAS) that
allow external resistors to set the internal bias currents.
Nominal values for these resistors are given in Table 1.
Larger value resistors can be used to reduce power
dissipation at the expense of some performance loss.
If ±1% resistors are not readily available, substitute with
±5% resistors.
Significant reductions in power consumption can also
be realized by operating the mixer with an optional sup-
ply voltage of 3.3V. Doing so reduces the overall power
consumption by up to 57%. See the 3.3V Supply AC
Electrical Characteristics—f RF = 2300MHz to 2900MHz,
High-Side LO Injection table and the relevant 3.3V
curves in the Typical Operating Characteristics section
to evaluate the power vs. performance tradeoffs.
LEXT Inductor
Short LEXT to ground using a 0 Ω resistor. For applica-
tions requiring improved RF-to-IF and LO-to-IF isolation,
L3 can be changed to optimize performance (see the
Typical Operating Characteristics). However, the load
impedance presented to the mixer must be so that any
capacitances from IF- and IF+ to ground do not exceed
several picofarads to ensure stable operating condi-
tions. Since approximately 90mA flows through LEXT, it
is important to use a low-DCR wire-wound inductor.
Layout Considerations
A properly designed PCB is an essential part of any
RF/microwave circuit. Keep RF signal lines as short as
possible to reduce losses, radiation, and inductance.
The load impedance presented to the mixer must be so
that any capacitance from both IF- and IF+ to ground
does not exceed several picofarads. For the best per-
formance, route the ground pin traces directly to the
exposed pad under the package. The PCB exposed
pad MUST be connected to the ground plane of the
PCB. It is suggested that multiple vias be used to con-
nect this pad to the lower-level ground planes. This
method provides a good RF/thermal-conduction path
for the device. Solder the exposed pad on the bottom
of the device package to the PCB. The MAX19996A
evaluation kit can be used as a reference for board lay-
out. Gerber files are available upon request at
www.maxim-ic.com .
Power-Supply Bypassing
Proper voltage-supply bypassing is essential for high-
frequency circuit stability. Bypass each V CC pin with
the capacitors shown in the Typical Application Circuit
and Table 1.
______________________________________________________________________________________
31
相关PDF资料 |
PDF描述 |
|---|---|
| MAX19996ETP+T | IC MIXER DOWNCONV 20-TQFN-EP |
| MAX19997AETX+T | IC DOWNCONVERTER 2CH 36TQFN |
| MAX19998ETP+ | IC MIXER DOWNCONVERSION 20TQFN |
| MAX19999ETX+T | IC DOWNCONVERTER 2CH 36TQFN |
| MAX2009ETI+T | IC RF PREDISTORT ADJ 28-TQFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX19996AEVKIT# | 功能描述:射频开发工具 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 |
| MAX19996ETP+ | 功能描述:上下转换器 High-Gain 2GHz to 3.9GHz Downconv 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 |
| MAX19996ETP+T | 功能描述:上下转换器 High-Gain 2GHz to 3.9GHz Downconv 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 |
| MAX19997 | 功能描述:上下转换器 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 |
| MAX19997AETX+ | 功能描述:上下转换器 High-Gain 1.8GHz to 2.9GHz Downconv 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 |
发布紧急采购，3分钟左右您将得到回复。