Overview
The HMC939LP4TR is a broadband 5-bit GaAs IC digital attenuator produced by Analog Devices Inc. This component is designed to operate over a wide frequency range of 0.1 to 33.0 GHz, making it suitable for various high-frequency applications. It is packaged in a low-cost, leadless surface mount package, specifically a 24-VFQFN exposed pad package. The attenuator features 1.0 dB least significant bit (LSB) steps, providing a total attenuation range of 31 dB. It is ideal for applications requiring precise and reliable attenuation control in high-frequency systems.
Key Specifications
| Parameter | Frequency Range | Min. | Typ. | Max. | Units |
|---|---|---|---|---|---|
| Insertion Loss | 0.1 - 18.0 GHz | 4.0 | 5.0 | 6.5 | dB |
| Insertion Loss | 18.0 - 26.5 GHz | 5.5 | 7.0 | 8.5 | dB |
| Insertion Loss | 26.5 - 33.0 GHz | 5.5 | 7.0 | 8.5 | dB |
| Attenuation Range | 0.1 - 33.0 GHz | 31 | dB | ||
| Return Loss (RF1 & RF2, All Atten. States) | 0.1 - 33.0 GHz | 12 | dB | ||
| Attenuation Accuracy | 1.0 - 15 dB States | ± (0.5 + 5%) of Atten. Setting Max | dB | ||
| Attenuation Accuracy | 16 - 31 dB States | ± (0.6 + 8%) of Atten. Setting Max | dB | ||
| Input Power for 0.1 dB Compression | 0.1 - 0.5 GHz | 20 | dBm | ||
| Input Power for 0.1 dB Compression | 0.5 - 33.0 GHz | 25 | dBm | ||
| Input Third Order Intercept Point (Two-Tone Input Power= 0 dBm Each Tone) | 0.1 - 0.5 GHz | 40 | dBm | ||
| Input Third Order Intercept Point (Two-Tone Input Power= 0 dBm Each Tone) | 0.5 - 33.0 GHz | 43 | dBm | ||
| Switching Characteristics tRISE, tFALL (10/90% RF) | 0.1 - 33.0 GHz | 60 | ns | ||
| Switching Characteristics tON/tOFF (50% CTL to 10/90% RF) | 0.1 - 33.0 GHz | 90 | ns | ||
| Idd | 0.1 - 33.0 GHz | 2.5 | 4.5 | 6.5 | mA |
| Iss | 0.1 - 33.0 GHz | -7.0 | -5.0 | -3.0 | mA |
Key Features
- Broadband operation from 0.1 to 33.0 GHz
- 5-bit digital attenuator with 1.0 dB LSB steps, providing a total attenuation of 31 dB
- High attenuation accuracy: ±0.4 dB typical step error
- High input IP3: +43 dBm
- Low insertion loss: less than 5 dB typical
- Single positive control line per bit
- Leadless surface mount package (24-VFQFN exposed pad)
- High return loss: 12 dB across all attenuation states
Applications
- Fiber Optics and Broadband Telecom
- Microwave Radio and VSAT
- Military Radios, Radar, and ECM
- Space Applications
- Sensors
- Test and Measurement Equipment
Q & A
- What is the frequency range of the HMC939LP4TR?
The HMC939LP4TR operates from 0.1 to 33.0 GHz.
- What is the total attenuation range of the HMC939LP4TR?
The total attenuation range is 31 dB, with 1.0 dB LSB steps.
- What is the typical insertion loss of the HMC939LP4TR?
The typical insertion loss is less than 5 dB.
- What is the input IP3 of the HMC939LP4TR?
The input IP3 is +43 dBm.
- What type of package does the HMC939LP4TR come in?
The component is packaged in a 24-VFQFN exposed pad package.
- What are the typical switching times for the HMC939LP4TR?
The typical rise and fall times are 60 ns, and the on/off times are 90 ns.
- What are the current consumption specifications for the HMC939LP4TR?
The current consumption (Idd) is between 2.5 mA and 6.5 mA, and the current sink (Iss) is between -7.0 mA and -3.0 mA.
- What are the typical applications for the HMC939LP4TR?
It is used in Fiber Optics, Broadband Telecom, Microwave Radio, VSAT, Military Radios, Radar, ECM, Space Applications, Sensors, and Test and Measurement Equipment.
- How accurate is the attenuation of the HMC939LP4TR?
The attenuation accuracy is ±0.4 dB typical step error.
- What is the return loss specification for the HMC939LP4TR?
The return loss is 12 dB across all attenuation states.
