ADL8124 - 1-20GHz LNA with Temp Sensor | Analog Devices
料号： ADL8124 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $12.5 | $12.50 |
| 10 | $11.25 | $112.50 |
| 100 | $9.8 | $980.00 |
| 500 | $8.75 | $4,375.00 |
| 1,000 | $7.9 | $7,900.00 |
ADL8124 概述
A low noise amplifier (LNA) is a critical component in RF and microwave receiver chains, placed at the front end to amplify weak signals while adding minimal noise. The LNA's noise figure directly affects the overall system sensitivity, and its gain helps overcome the noise of subsequent stages. In the hierarchy of RF signal chains, the LNA is part of the receiver front-end, which includes filters, mixers, and analog-to-digital converters. The ADL8124's integrated features reduce external component count and simplify PCB design, making it an attractive choice for high-frequency communication systems.
Key features of the ADL8124 include its wide frequency coverage from 1GHz to 20GHz, which spans multiple communication bands including 5G, radar, and satellite communications. The integrated temperature sensor allows for real-time monitoring of the device's thermal state, enabling adaptive bias control or system-level thermal management. The enable/disable pin (VENBL) provides flexible power management, allowing the LNA to be shut down when not in use to save power. The on-chip AC coupling capacitors and bias inductor eliminate the need for external matching components, simplifying the design and reducing board space.
Technically, the ADL8124 is designed using GaAs pHEMT technology, which offers excellent high-frequency performance with low noise and high gain. The device is specified at VDD = 3.3V, IDQ = 55mA, with a bias resistance (RBIAS) of 1540Ω and VENBL = 3.3V. The typical noise figure of 2.1dB and gain of 15dB are achieved across the entire 1-20GHz band, making it a versatile solution for various RF applications. The integrated temperature sensor provides a voltage output proportional to temperature, which can be read by an ADC for monitoring purposes.
Typical applications for the ADL8124 include 5G base stations, radar systems, satellite communications, point-to-point radios, and test and measurement equipment. Its wide bandwidth and low noise figure make it ideal for receiver front-ends in these systems, where signal integrity is paramount. The compact LFCSP package and integrated features allow for dense PCB layouts, which is essential in modern RF modules.
When designing with the ADL8124, it is important to ensure proper thermal management, as the device dissipates power during operation. The enable pin can be used to power down the LNA when not in use, reducing overall system power consumption. Additionally, the bias resistor (RBIAS) should be selected according to the datasheet recommendations to achieve the desired quiescent current and performance.
直接替换替代料： ADL8124 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： ADL8124 （相同外形与封装尺寸） ——差异在于 Frequency Range, Gain, Noise Figure, Package, Technology.
快速对比工具——选择替代料号进行并排对比：
ADL8124ACPZN
✅ 直接替换📋 参考替代料（不在目录中）
ADL5523
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ADL5521
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
HMC8411
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$32.9 / 个
查看数据手册 →HMC8410
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ADL8124 最大额定值与电气特性
| Frequency Range | 1 GHz to 20 GHz |
| Noise Figure | 2.1 dB (typical) |
| Gain | 15 dB (typical) |
| Supply Voltage (VDD) | 3.3 V |
| Quiescent Current (IDQ) | 55 mA |
| Bias Resistance (RBIAS) | 1540 Ω |
| Enable Voltage (VENBL) | 3.3 V |
| 封装 | 8-LFCSP (2x2 mm) |
| Technology | GaAs pHEMT |
| Integrated Temperature Sensor | Yes |
| Enable/Disable Pin | Yes (VENBL) |
| Input/Output AC Coupling Capacitors | Integrated |
| Bias Inductor | Integrated |
| RoHS Compliant | Yes |
ADL8124 引脚配置
| 引脚 1 | RFIN — RF input |
| 引脚 2 | VENBL — Enable/disable control |
| 引脚 3 | VDD — Supply voltage |
| 引脚 4 | RBIAS — Bias resistor connection |
| 引脚 5 | TEMP — Temperature sensor output |
| 引脚 6 | GND — Ground |
| 引脚 7 | RFOUT — RF output |
| 引脚 8 | GND — Ground |
典型应用
ADL8124 适用于 6 应用s: 5G Base Station Receiver, Radar Systems, Satellite Communications, Point-to-Point Radios, Test and Measurement Equipment, Electronic Warfare.
5G Base Station Receiver
The ADL8124's wideband coverage from 1GHz to 20GHz and low noise figure of 2.1dB make it ideal for 5G base station receiver front-ends. It amplifies weak signals from the antenna while minimizing added noise, improving system sensitivity. The integrated enable pin allows for power saving during idle periods, and the temperature sensor enables thermal monitoring for reliable operation in outdoor environments.
推荐
Radar Systems
In radar systems, the ADL8124 provides low-noise amplification across the 1-20GHz band, covering X-band and Ku-band radar frequencies. Its 15dB gain helps boost return signals, while the integrated temperature sensor allows for calibration over temperature. The compact LFCSP package is suitable for phased-array radar modules where space is limited.
推荐
Satellite Communications
The ADL8124 is well-suited for satellite communication ground terminals, covering C, X, Ku, and Ka bands. Its low noise figure of 2.1dB ensures minimal signal degradation, critical for weak satellite signals. The integrated bias inductor and AC coupling capacitors reduce external component count, simplifying the RF front-end design. The enable pin allows for power management in battery-powered or solar-powered systems.
推荐
Point-to-Point Radios
For point-to-point microwave links, the ADL8124 offers wideband coverage from 1GHz to 20GHz, supporting multiple frequency bands with a single design. Its 15dB gain and 2.1dB noise figure provide excellent sensitivity for long-range communication. The integrated temperature sensor enables real-time monitoring, and the enable pin allows for efficient power management in remote installations.
推荐
Test and Measurement Equipment
The ADL8124 is used in test and measurement equipment such as spectrum analyzers and signal generators, where wideband amplification with low noise is required. Its 1-20GHz frequency range covers many test bands, and the integrated features simplify calibration. The temperature sensor aids in maintaining accuracy over temperature variations.
推荐
Electronic Warfare
In electronic warfare systems, the ADL8124 provides wideband amplification from 1-20GHz, covering multiple threat bands. Its low noise figure ensures detection of weak signals, and the fast enable/disable capability allows for rapid switching between receive and standby modes. The integrated temperature sensor supports system health monitoring in harsh environments.
推荐
推荐产品汇总
工程参考数据： ADL8124 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | ADL8124ACPZN | ADL5523 | ADL5521 | HMC8411 | HMC8410 |
|---|---|---|---|---|---|---|
| Package | 8-LFCSP (2x2) | 8-LFCSP (2x2) | 8-LFCSP (2x2) | 8-LFCSP (2x2) | 8-LFCSP (2x2) | 8-LFCSP (2x2) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Frequency Range | 1-20 GHz | 1-20 GHz | 0.4-4 GHz | 0.4-4 GHz | 0.01-10 GHz | 0.01-10 GHz |
| Noise Figure | 2.1 dB | 2.1 dB | 0.8 dB | 0.8 dB | 1.1 dB | 1.1 dB |
| Gain | 15 dB | 15 dB | 20 dB | 20 dB | 15.5 dB | 15.5 dB |
| Supply Voltage | 3.3 V | 3.3 V | 5 V | 5 V | 5 V | 5 V |
| Integrated Temperature Sensor | Yes | Yes | No | No | No | No |
| Enable Pin | Yes | Yes | No | No | No | No |
关键差异点
- Wideband coverage from 1GHz to 20GHz （对比 ADL5523)
- Integrated temperature sensor （对比 HMC8411)
- Integrated enable pin （对比 ADL5521)
设计说明
The ADL8124 dissipates power during operation, so proper thermal management is essential. The integrated temperature sensor can be used to monitor the die temperature and trigger system-level thermal shutdown if needed. Ensure adequate PCB copper area and thermal vias are used to dissipate heat, especially in high ambient temperature environments.
For optimal RF performance, place the ADL8124 close to the antenna or RF input, and use controlled impedance traces (50Ω) for RF lines. The integrated AC coupling capacitors and bias inductor reduce external component count, but ensure the RBIAS resistor is placed close to the RBIAS pin to minimize parasitic inductance. Follow the evaluation board layout guidelines in the EVAL-ADL8124 user guide.
Do not exceed the maximum supply voltage and ensure VENBL is properly driven to enable the device. The bias resistor (RBIAS) must be selected according to the datasheet to achieve the desired quiescent current (55mA typical). Incorrect RBIAS can degrade noise figure and gain. Also, ensure the temperature sensor output is not loaded excessively to avoid accuracy degradation.
合规信息
RoHS compliant per Analog Devices product page. Other compliance information not specified in the provided data.
