PE43711B-Z: Advanced Programmable RF Attenuator by pSemi for Precision Signal Control

The PE43711B-Z from pSemi (formerly Peregrine Semiconductor) is a cutting-edge programmable RF attenuator designed for engineers demanding exceptional signal control in high-frequency applications. This comprehensive guide explores its technical specifications, performance advantages, and diverse use cases to help you optimize your RF system design.

Product Overview and Key Benefits

As part of pSemi's renowned RF component portfolio, the PE43711B-Z stands out with its:

• Industry-leading attenuation precision (0.25dB steps)
• Ultra-wide frequency coverage from 9kHz to 6GHz
• Exceptional linearity and low insertion loss
• Robust 24-VFQFN package with thermal pad

Detailed Technical Specifications

1. Attenuation Performance

• Range: 0dB to 31.75dB in 0.25dB steps (127 states)
• Accuracy: 0.5dB typical at 2GHz
• Step Error: 0.25dB maximum

2. Frequency Characteristics

• Bandwidth: 9kHz - 6GHz (-3dB cutoff)
• Flatness: 0.5dB typical across full range
• Return Loss: >14dB at all attenuation states

3. Power and Impedance

• Impedance: 50 matched
• Power Handling: +30dBm input IP3
• Current Consumption: <1 A in standby

4. Package Details

• Type: 24-lead VFQFN (4mm 4mm)
• Thermal Resistance: 35 C/W (junction-to-ambient)
• Operating Temperature: -40 C to +105 C

Advanced Features

Digital Control Interface

The PE43711B-Z features a 3-wire SPI-compatible interface (up to 50MHz clock) for seamless microcontroller integration. The interface includes:

• Programmable slew rate control
• Daisy-chain capability for multiple devices
• Power-down mode for energy efficiency

Enhanced Linearity

With +67dBm OIP3 at 2GHz, the attenuator maintains exceptional signal integrity even in high-power applications, making it ideal for:

• 5G base stations
• Microwave backhaul systems
• Aerospace radar

Application Scenarios

1. Wireless Infrastructure

In 5G massive MIMO systems, the PE43711B-Z enables:

• Precise beamforming calibration
• Automatic gain control loops
• PA linearization

2. Test & Measurement

For RF test equipment, the attenuator provides:

• Programmable stimulus level control
• Receiver protection circuits
• Signal chain optimization

3. Aerospace/Defense

In critical systems, it offers:

• EW system attenuation
• Radar echo simulation
• Secure comms leveling

Design Considerations

PCB Layout Guidelines

• Use continuous ground plane beneath package
• Minimize RF trace lengths (<5mm ideal)
• Implement proper via fencing for isolation

Thermal Management

The exposed pad requires:

• Minimum 4 4 via array (0.3mm diameter)
• Thermal paste/tape for heatsinking
• Airflow consideration in dense arrays

Comparative Advantages

When benchmarked against competing attenuators, the PE43711B-Z demonstrates:

Parameter	PE43711B-Z	Typical Competitor
Frequency Range	9kHz-6GHz	100MHz-4GHz
Attenuation Steps	0.25dB	1dB
Switching Speed	<500ns	2 s
Package Size	4 4mm	5 5mm

Purchasing Information

The PE43711B-Z is available through:

• pSemi authorized distributors (Digi-Key, Mouser)
• Direct OEM pricing for volume orders
• Evaluation kit (PE43711B-EK) for prototyping

Conclusion

The PE43711B-Z represents the pinnacle of programmable RF attenuation technology, combining precision, bandwidth, and integration capabilities unmatched in the industry. Its 9kHz-6GHz operation, 0.25dB step resolution, and compact footprint make it the ideal solution for next-generation wireless systems, test equipment, and defense electronics.

For design engineers seeking to optimize signal chain performance, the PE43711B-Z delivers:

• Superior signal integrity
• Design flexibility
• Reliability in harsh environments

Visit pSemi's official website today to access the complete PE43711B-Z datasheet, application notes, and reference designs to accelerate your product development.