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| 型号： | MAX2682EUT+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 9/11页 |
| 文件大小： | 0K |
| 描述： | IC DOWNCONVERTER MIXER SOT23-6 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| RF 型： | 手机，ISM，PCS，WLL |
| 频率： | 400MHz ~ 2.5GHz |
| 混频器数目： | 1 |
| 增益： | 14.7dB |
| 噪音数据： | 13.4dB |
| 次要属性： | 降频变频器 |
| 电流 - 电源： | 15mA |
| 电源电压： | 2.7 V ~ 5.5 V |
| 包装： | 标准包装 |
| 封装/外壳： | SOT-23-6 |
| 供应商设备封装： | SOT-6 |
| 其它名称： | MAX2682EUT+TDKR |
400MHz to 2.5GHz, Low-Noise,
SiGe Downconverter Mixers
Detailed Description
The MAX2680/MAX2681/MAX2682 are 400MHz to
2.5GHz, silicon-germanium, double-balanced down-
converter mixers. They are designed to provide opti-
mum linearity performance for a specified supply
current. They consist of a double-balanced Gilbert-cell
mixer with single-ended RF, LO, and IF port connec-
tions. An on-chip bias cell provides a low-power shut-
down feature. Consult the Selector Guide for device
features and comparison.
Applications Information
Local-Oscillator (LO) Input
The LO input is a single-ended broadband port with a
typical input VSWR of better than 2.0:1 from 400MHz to
2.5GHz. The LO signal is mixed with the RF input sig-
nal, and the resulting downconverted output appears at
IFOUT. AC-couple LO with a capacitor. Drive the LO
port with a signal ranging from -10dBm to 0 (50 ?
source).
RF Input
The RF input frequency range is 400MHz to 2.5GHz.
The RF input requires an impedance-matching network
as well as a DC-blocking capacitor that can be part of
the matching network. Consult Tables 1 and 2, as well
as the RF Port Impedance vs. RF Frequency graph in
the Typical Operating Characteristics for information on
matching.
Table 1. RFIN Port Impedance
FREQUENCY
PART
IF Output
The IF output frequency range extends from 10MHz to
500MHz. IFOUT is a high-impedance, open-collector
output that requires an external inductor to V CC for
proper biasing. For optimum performance, the IF port
requires an impedance-matching network. The configu-
ration and values for the matching network is depen-
dent upon the frequency and desired output
impedance. For assistance in choosing components for
optimal performance, refer to Tables 3 and 4 as well as
the IF Port Impedance vs. IF Frequency graph in the
Typical Operating Characteristics.
Power-Supply and S H D N Bypassing
Proper attention to voltage supply bypassing is essen-
tial for high-frequency RF circuit stability. Bypass V CC
with a 10μF capacitor in parallel with a 1000pF capaci-
tor. Use separate vias to the ground plane for each of
the bypass capacitors and minimize trace length to
reduce inductance. Use separate vias to the ground
plane for each ground pin. Use low-inductance ground
connections.
Decouple SHDN with a 1000pF capacitor to ground to
minimize noise on the internal bias cell. Use a series
resistor (typically 100 ? ) to reduce coupling of high-fre-
quency signals into the SHDN pin.
Layout Issues
A well designed PC board is an essential part of an RF
circuit. For best performance, pay attention to power-
supply issues as well as to the layout of the RFIN and
IFOUT impedance-matching network.
400MHz
900MHz
1950MHz
2450MHz
MAX2680
MAX2681
MAX2682
179-j356
209-j332
206-j306
54-j179
75-j188
78-j182
32-j94
34-j108
34-j106
33-j73
33-j86
29-j86
Table 2. RF Input Impedance-Matching Component Values
FREQUENCY
MATCHING
MAX2680
MAX2681
MAX2682
COMPONENTS
Z1
Z2
Z3
400
MHz
86nH
270pF
Open
900
MHz
270pF
22nH
Open
1950
MHz
1.5pF
270pF
1.8nH
2450
MHz
Short
270pF
1.8nH
400
MHz
68nH
270pF
0.5pF
900
MHz
270pF
18nH
Open
1950
MHz
1.5pF
270pF
1.8nH
2450
MHz
Short
270pF
2.2nH
400
MHz
68nH
270pF
0.5pF
900
MHz
1.5pF
270pF
10nH
1950
MHz
Short
270pF
2.2nH
2450
MHz
Short
270pF
1.2nH
Note: Z1, Z2, and Z3 are found in the Typical Operating Circuit.
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相关代理商/技术参数 |
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| MAX2682EUT-TG21 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX2682EVKIT | 功能描述:射频开发工具 MAX2680-82 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 |
| MAX2683EUE | 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 |
| MAX2683EUE+ | 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 |
| MAX2683EUE+T | 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 |
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