Overview
The HMC624A, produced by Analog Devices Inc., is a 6-bit digital attenuator designed for high-performance RF applications. It features a 31.5 dB attenuation control range in 0.5 dB steps, making it highly versatile for various RF and microwave systems. The device integrates a CMOS driver and a gallium arsenide (GaAs) RF attenuator, ensuring excellent attenuation accuracy and high input linearity over a frequency range from 100 MHz to 6.0 GHz. It operates with a single positive supply voltage from 3 V to 5 V and provides a CMOS-/TTL-compatible control interface. The HMC624A is packaged in a compact, RoHS-compliant 4 mm × 4 mm LFCSP package, which is pin compatible with the HMC1122 except for the ACGx pins.
Key Specifications
| Parameter | Value |
|---|---|
| Attenuation Control Range | 31.5 dB in 0.5 dB steps |
| Frequency Range | 100 MHz to 6.0 GHz |
| Supply Voltage | 3 V to 5 V |
| Control Interface | CMOS-/TTL-compatible, Serial and Parallel |
| Package Type | 24-lead, 4 mm × 4 mm LFCSP |
| RF Input Power Handling | 28 dBm |
| Phase Shift | 25° at 3 GHz |
| RF Input/Output Impedance | Internally matched to 50 Ω |
Key Features
- Excellent attenuation accuracy and high input linearity over the specified frequency range.
- Single-supply operation with a voltage range of 3 V to 5 V.
- CMOS-/TTL-compatible control interface with both serial and parallel control options.
- User-selectable power-up state and serial output port for cascading other serial-controlled components.
- Bidirectional attenuator with interchangeable RF input and output ports.
- Compact, RoHS-compliant 4 mm × 4 mm LFCSP package.
Applications
- Cellular infrastructure
- Microwave radios and very small aperture terminals (VSATs)
- Test equipment and sensors
- Intermediate frequency (IF) and radio frequency (RF) designs
Q & A
- What is the attenuation control range of the HMC624A?
The HMC624A has a 31.5 dB attenuation control range in 0.5 dB steps.
- What is the frequency range of the HMC624A?
The HMC624A operates from 100 MHz to 6.0 GHz.
- What type of control interface does the HMC624A offer?
The HMC624A offers both serial and parallel control interfaces, which are CMOS-/TTL-compatible.
- What is the supply voltage range for the HMC624A?
The HMC624A operates with a single positive supply voltage from 3 V to 5 V.
- What is the package type of the HMC624A?
The HMC624A is packaged in a 24-lead, 4 mm × 4 mm LFCSP package.
- Is the HMC624A bidirectional?
- What are some typical applications of the HMC624A?
The HMC624A is used in cellular infrastructure, microwave radios, VSATs, test equipment, and IF/RF designs.
- How does the HMC624A handle RF input power?
The HMC624A can handle RF input power up to 28 dBm.
- What is the phase shift of the HMC624A at 3 GHz?
The phase shift of the HMC624A is 25° at 3 GHz.
- Is the HMC624A RoHS compliant?
