Overview
The HMC939A is a broadband 5-bit GaAs IC digital attenuator MMIC chip produced by Analog Devices Inc. This component is designed to operate over a wide frequency range of 0.1 to 40 GHz, making it suitable for various high-frequency applications. The attenuator features 1.0 dB least significant bit (LSB) steps, allowing for 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 | Value |
|---|---|
| Frequency Range | 0.1 to 40 GHz |
| Attenuation Steps | 1.0 dB (LSB) |
| Total Attenuation Range | 31 dB |
| Insertion Loss | < 5 dB typical |
| Attenuation Accuracy | ±1.0 dB typical step error |
| Input IP3 | +43 dBm typical |
| Supply Voltages | VDD = +5V, VSS = -5V |
| Control Voltage Inputs | 5 control voltage inputs (P0 to P4), toggled between +5V and 0V |
| Die Size | 2.34 x 1.0 x 0.1 mm |
| Operating Temperature | -40°C to +85°C |
| Storage Temperature | -65°C to +150°C |
Key Features
- Broadband operation from 0.1 to 40 GHz
- 5-bit digital attenuator with 1.0 dB LSB steps
- Total attenuation range of 31 dB
- Excellent attenuation accuracy with ±1.0 dB typical step error
- High input IP3 of +43 dBm typical
- CMOS-/TTL-compatible parallel control interface
- Dual supply voltages: VDD = +5V, VSS = -5V
Applications
- Fiber Optics & Broadband Telecom
- Microwave Radio & VSAT
- Military Radios, Radar & ECM
- Space Applications
- Test Instrumentation
Q & A
- What is the frequency range of the HMC939A? The HMC939A operates over a frequency range of 0.1 to 40 GHz.
- What are the attenuation steps of the HMC939A? The HMC939A has 1.0 dB least significant bit (LSB) steps.
- What is the total attenuation range of the HMC939A? The total attenuation range is 31 dB.
- What is the typical insertion loss of the HMC939A? The typical insertion loss is less than 5 dB.
- What is the attenuation accuracy of the HMC939A? The attenuation accuracy is ±1.0 dB typical step error.
- What is the input IP3 of the HMC939A? The input IP3 is +43 dBm typical.
- What are the supply voltages required for the HMC939A? The HMC939A requires dual supply voltages: VDD = +5V and VSS = -5V.
- How is the attenuation controlled in the HMC939A? The attenuation is controlled by five control voltage inputs (P0 to P4), toggled between +5V and 0V.
- What are the typical operating temperatures for the HMC939A? The operating temperature range is -40°C to +85°C.
- What are the storage temperatures for the HMC939A? The storage temperature range is -65°C to +150°C.
