CLC5526MSAX/NOPB

Overview

The CLC5526MSAX/NOPB is a high-performance, digitally controlled variable-gain amplifier (DVGA) from Texas Instruments. It features differential input and output with an input impedance of 200Ω and an output impedance of 600Ω. The device operates on a single +5V supply with a typical current consumption of 48 mA. It provides a wide gain range from -12 dB to +30 dB in 6 dB steps, controlled via a 3-bit parallel interface. The small-signal bandwidth is 350 MHz, maintaining this performance across the entire gain range. It includes internal clamping for fast overdrive recovery and supports TTL/CMOS logic compatibility.

Feature Summary

• Differential input and output architecture supporting large signal swings on a single 5V rail
• Digital control via 3-bit parallel inputs with transparent or latched data modes
• Low noise figure and excellent two-tone intermodulation distortion performance
• Integrated shutdown mode for low-power standby operation

Applications

• Cellular and PCS base stations
• IF sampling receivers
• Back-channel modems
• Infrared and CCD imaging systems

Procurement Notes

Verify the specific suffix 'MSAX' against the manufacturer's official documentation to confirm package type and tape-and-reel specifications. Ensure the component meets RoHS compliance requirements as indicated by the NOPB designation. Confirm that the operating temperature range aligns with industrial standards (-40°C to +85°C). Validate pinout compatibility with existing PCB layouts before integration.

Selection Notes

Select this component when a fixed-gain amplifier cannot accommodate varying signal levels in mixed-signal communication systems. The differential I/O simplifies interfacing with ADCs and other balanced circuits. Consider the 350 MHz bandwidth requirement and the need for precise digital gain stepping. Evaluate the power consumption constraints relative to the 48 mA typical draw and the availability of a +5V supply rail.

Part Context

This part belongs to the CLC5526 family of digitally variable gain amplifiers designed for RF and IF applications. It serves as a key component in automatic gain control (AGC) loops to extend system dynamic range. The device integrates a resistive ladder and amplifier stages to provide accurate gain adjustments without external calibration.

Replacement Considerations

Consult the manufacturer's product change notification database for officially confirmed substitute part numbers. Verify functional equivalence regarding gain range, bandwidth, and digital control interface before substitution.

FAQ

How is the gain value determined?

The gain is set by a 3-bit parallel digital word, providing eight discrete steps ranging from -12 dB to +30 dB in 6 dB increments.

What is the function of the LATCH pin?

The LATCH pin controls whether the device operates in transparent mode, where gain changes immediately follow data inputs, or latched mode, where updates occur only on the rising edge of the latch signal.

Can the CLC5526 drive single-ended loads?

While designed for differential outputs, it can drive single-ended loads if properly terminated, though differential driving is recommended for optimal performance and common-mode voltage stability.