ADL8124ACPZ - 1-20GHz LNA with Temp Sensor | Analog Devices
MPN: ADL8124ACPZ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $12.5 | $12.50 |
| 10 | $11.25 | $112.50 |
| 100 | $10 | $1,000.00 |
| 500 | $9 | $4,500.00 |
| 1,000 | $8.1 | $8,100.00 |
ADL8124ACPZ Overview
A low noise amplifier (LNA) is a critical building block in RF receivers, placed at the front end to amplify weak signals while adding minimal noise. The ADL8124 belongs to the class of wideband LNAs, covering 1GHz to 20GHz, which spans multiple communication bands including 5G, satellite, and radar. Its integrated bias inductor and AC coupling capacitors reduce external component count, simplifying PCB design and improving reliability.
Key features include a wide frequency range of 1GHz to 20GHz, low noise figure, and high gain, making it suitable for various RF front-end applications. The integrated temperature sensor provides real-time monitoring for thermal management, and the enable pin allows power gating for duty-cycled systems. The device operates from a single 3.3V supply, with a typical quiescent current of 55mA, and includes an exposed pad for thermal and electrical grounding.
The ADL8124 uses a GaAs or SiGe process (exact process not specified in available data) to achieve high-frequency performance. The integrated bias inductor and AC coupling capacitors are designed to minimize external components, while the temperature sensor and enable pin add functionality without compromising RF performance. The package ground leads and exposed pad connect directly to the ground plane, with multiple vias recommended for adequate electrical and thermal conduction.
Typical applications include 5G base stations, satellite communications, radar systems, and test and measurement equipment. The wide frequency range and low noise figure make it suitable for both narrowband and wideband receivers. The integrated temperature sensor is particularly useful in high-reliability systems where thermal monitoring is critical.
When designing with the ADL8124, ensure proper grounding of the exposed pad and use multiple vias to the ground plane for optimal thermal and electrical performance. The enable pin can be used for power sequencing or duty-cycling to reduce average power consumption.
Drop-in alternatives for ADL8124ACPZ — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADL8124ACPZN
✅ Drop-In📋 Reference alternative (not in catalog)
ADL8124ACPZ Maximum Ratings & Electrical Characteristics
| Frequency Range | 1 GHz to 20 GHz |
| Supply Voltage (VDD) | 3.3 V |
| Quiescent Current (IDQ) | 55 mA |
| Bias Resistor (RBIAS) | 1540 Ω |
| Enable Voltage (VENBL) | 3.3 V |
| Case Temperature (TCASE) | 25 °C |
| Package | 8-LFCSP (2x2 mm) |
| Mounting Type | Surface Mount |
| Integrated Temperature Sensor | Yes |
| Enable/Disable Pin | Yes (VENBL) |
| Input AC Coupling Capacitor | Integrated |
| Output AC Coupling Capacitor | Integrated |
| Bias Inductor | Integrated |
| RoHS Status | Compliant |
ADL8124ACPZ Pin Configuration
| Pin 1 | RFIN — RF input, AC coupled |
| Pin 2 | GND — Ground |
| Pin 3 | VENBL — Enable/disable control |
| Pin 4 | VDD — Supply voltage |
| Pin 5 | RFOUT — RF output, AC coupled |
| Pin 6 | GND — Ground |
| Pin 7 | TEMP — Temperature sensor output |
| Pin 8 | RBIAS — Bias resistor connection |
| Pin 9 | EP — Exposed pad, ground |
Typical Applications
ADL8124ACPZ is suitable for 6 applications: 5G Base Station Receivers, Satellite Communication Systems, Radar Systems, Test and Measurement Equipment, Point-to-Point Microwave Links, Electronic Warfare Systems.
5G Base Station Receivers
The ADL8124ACPZ's 1-20GHz frequency range covers sub-6GHz and mmWave 5G bands, making it ideal for base station front-ends. Its low noise figure enhances receiver sensitivity, while the integrated temperature sensor enables real-time thermal monitoring for reliable operation in outdoor environments. The enable pin allows power gating during idle periods to reduce power consumption.
Recommended
Satellite Communication Systems
The wideband operation from 1GHz to 20GHz supports C, X, Ku, and Ka-band satellite links. The ADL8124's low noise figure improves link budget, and the integrated bias inductor reduces external component count, simplifying the RF front-end design. The temperature sensor aids in compensating for gain variations over temperature, ensuring consistent performance in space-grade applications.
Recommended
Radar Systems
The ADL8124's 1-20GHz frequency range covers various radar bands, including S, C, X, and Ku. Its high gain and low noise figure enhance detection range, while the enable pin supports pulsed operation for duty-cycled radar. The compact 2x2mm package is ideal for phased-array modules where space is at a premium.
Recommended
Test and Measurement Equipment
The wideband, flat gain response of the ADL8124 makes it suitable for spectrum analyzers, signal generators, and network analyzers. Its integrated temperature sensor provides calibration data for accurate measurements over temperature. The enable pin allows for fast switching in time-domain measurements, and the small package enables dense instrument designs.
Recommended
Point-to-Point Microwave Links
The ADL8124's 1-20GHz coverage includes licensed microwave bands used in backhaul links. Its low noise figure improves link reliability, and the integrated bias inductor simplifies the BOM. The temperature sensor enables adaptive bias control to maintain performance over environmental changes, ensuring consistent data throughput.
Recommended
Electronic Warfare Systems
The wideband 1-20GHz operation and fast enable/disable capability make the ADL8124 suitable for electronic warfare receivers that must cover multiple bands and respond quickly to threats. The integrated temperature sensor aids in system health monitoring, and the compact package supports dense array integration.
Recommended
Recommended Products Summary
Engineering reference data for ADL8124ACPZ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADL8124ACPZN | HMC8411LP6GE | TGA2594-CP |
|---|---|---|---|---|
| Package | 8-LFCSP (2x2) | 8-LFCSP (2x2) - same | LFCSP-16 (3x3) - different | QFN-24 (4x4) - different |
| Brand | Analog Devices | Analog Devices | Analog Devices | Qorvo |
| Frequency Range | 1 GHz to 20 GHz | 1 GHz to 20 GHz | 0.4 GHz to 10 GHz | 2 GHz to 20 GHz |
| Supply Voltage | 3.3 V | 3.3 V | 5 V | 5 V |
| Quiescent Current | 55 mA | 55 mA | 90 mA | 150 mA |
| Integrated Temperature Sensor | Yes | Yes | No | No |
| Enable Pin | Yes | Yes | No | No |
| Integrated Bias Inductor | Yes | Yes | No | No |
Key Differentiators
- Integrated temperature sensor (vs HMC8411LP6GE)
- Enable/disable pin (vs TGA2594-CP)
- Integrated bias inductor and AC coupling capacitors (vs HMC8411LP6GE)
Design Notes
The package ground leads and exposed pad must connect directly to the ground plane. Use multiple vias beneath the ground paddle to provide adequate electrical and thermal conduction. Follow the layout guidelines in the ADL8124 datasheet for optimal RF performance.
The integrated temperature sensor can be used to monitor the die temperature. Ensure the exposed pad is soldered to a thermal pad with sufficient copper area to dissipate heat. The device's power dissipation is approximately 182mW (3.3V * 55mA), which is manageable with proper PCB design.
Do not exceed the maximum supply voltage or reverse the supply polarity. The enable pin (VENBL) must be driven to a valid logic level; floating it may cause unpredictable operation. Use the recommended bias resistor value (1540Ω) to set the correct quiescent current.
Compliance Information
RoHS compliance inferred from Analog Devices standard practice; not explicitly stated in provided data.
