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| 型号： | MAX19998ETP+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 26/28页 |
| 文件大小： | 0K |
| 描述： | IC MIXER DOWNCONVERSION 20TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| RF 型： | LTE，MMDS，WCS，WiMAX |
| 频率： | 2.3GHz ~ 4GHz |
| 混频器数目： | 1 |
| 增益： | 8.7dB |
| 噪音数据： | 9.7dB |
| 次要属性： | 降频变频器 |
| 电流 - 电源： | 230mA |
| 电源电压： | 3.3 V ~ 5 V |
| 包装： | 带卷 (TR) |
| 封装/外壳： | 20-WQFN 裸露焊盘 |
| 供应商设备封装： | 20-TQFN-EP（5x5） |
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SiGe, High-Linearity, 2300MHz to 4000MHz
Downconversion Mixer with LO Buffer
LEXT Inductor
Short LEXT to ground using a 0 I 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 such that any
capacitances from IF- and IF+ to ground do not exceed
several picofarads to ensure stable operating conditions.
Since approximately 120mA 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 pos-
sible to reduce losses, radiation, and inductance. The
load impedance presented to the mixer must be such
that any capacitance from both IF- and IF+ to ground
Table 1. Component Values
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 connect 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 MAX19998 evaluation kit can be used
as a reference for board layout. 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
see Table 1 for component values.
DESIGNATION
C1
C2, C6, C8, C11
C3, C9
C10
C13, C14
C15
C16
L1, L2
L3
R1
R2
R3
T1
U1
QTY
1
4
0
1
2
1
1
2
1
1
1
1
1
1
DESCRIPTION
8.2pF microwave capacitor (0402). Use for RF
frequencies ranging from 3000MHz to 4000MHz.
3.3nH microwave inductor (0402). Use for RF
frequencies ranging from 2300MHz to 2900MHz.
0.01 F F microwave capacitors (0402)
Not installed, capacitors
2pF microwave capacitor (0402)
1000pF microwave capacitors (0402)
82pF microwave capacitor (0402)
Not installed for RF frequencies ranging from
3000MHz to 4000MHz
0.3pF microwave capacitor (0402). Use for RF
frequencies ranging from 2300MHz to 2900MHz.
390nH wire-wound high-Q inductors* (0805)
4.7nH wire-wound high-Q inductor (0603)
698 I Q 1% resistor (0402). Use for V CC = 5.0V
applications.
845 I Q 1% resistor (0402). Use for V CC = 3.3V
applications.
604 I Q 1% resistor (0402). Use for V CC = 5.0V
applications.
1.1k I Q 1% resistor (0402). Use for V CC = 3.3V
applications.
0 I resistor (1206)
4:1 IF balun TC4-1W-17*
MAX19998 IC (20 Thin QFN-EP)
COMPONENT SUPPLIER
Murata Electronics North America, Inc.
Coilcraft, Inc.
Murata Electronics North America, Inc.
—
Murata Electronics North America, Inc.
Murata Electronics North America, Inc.
Murata Electronics North America, Inc.
—
Murata Electronics North America, Inc.
Coilcraft, Inc.
Coilcraft, Inc.
Digi-Key Corp.
Digi-Key Corp.
Digi-Key Corp.
Mini-Circuits
Maxim Integrated Products, Inc.
*Use larger value inductors and a TC4-1W-7A 4:1 balun for IF frequencies below 200MHz.
26
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX19998EVKIT# | 制造商:Maxim Integrated Products 功能描述:SIGE HIGH-LINEARITY 2300MHZ TO 4000MHZ DOWNCONVERSION MIXER - Boxed Product (Development Kits) |
| MAX19999A | 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 |
| MAX19999ETX+ | 功能描述:上下转换器 High-Gain 3GHz to 4GHz 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 |
| MAX19999ETX+T | 功能描述:上下转换器 High-Gain 3GHz to 4GHz 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 |
| MAX1999EEI | 功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
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