HMC900LP5ETR

Overview

The HMC900LP5E is a dual, fully calibrated, programmable bandwidth low-pass filter with an integrated ADC driver. It features a 6th-order Butterworth response and supports arbitrary bandwidths from 3.5 MHz to 50 MHz. The device offers 0 dB or 10 dB input gain settings and includes a 100 MHz bypass option. Key electrical specifications include a maximum output IP3 of +30 dBm, a noise figure of 12 dB (at max gain), and a supply voltage range of 4.75 V to 5.25 V. It operates within a temperature range of -40°C to +85°C and is housed in a 32-lead QFN package.

Feature Summary

• Dual-channel architecture providing matched I/Q paths for excellent quadrature balance.
• Programmable bandwidth control via SPI interface with automatic calibration capabilities.
• Integrated DC driver amplifier simplifies system implementation and interface requirements.
• External common mode output level control allows flexible biasing configurations.

Applications

• Baseband filtering before analog-to-digital converters or after digital-to-analog converters in fixed wireless systems.
• Integrated direct conversion receivers when used with mixers and variable gain amplifiers.
• Software-defined radio applications requiring adaptable signal processing.
• Anti-aliasing and reconstruction filters in test and measurement equipment.

Procurement Notes

Verify the specific ordering suffix to confirm factory pre-programming parameters such as gain and bandwidth. Confirm RoHS compliance status and moisture sensitivity level prior to assembly. Ensure the design accounts for the required calibration clock frequency if user calibration is utilized. Check for any discontinuance notifications as this component may be subject to end-of-life status.

Selection Notes

Select the unprogrammed version for maximum flexibility in variable bandwidth applications requiring user calibration. Choose pre-programmed variants for fixed bandwidth designs to simplify software control. Ensure the required corner frequency accuracy aligns with the calibration method; user calibration provides tighter tolerance than default power-on reset settings. Verify that the 5V supply current consumption fits the thermal budget of the application.

Part Context

This component belongs to the HMC900 series of IF and baseband signal processing devices. It is designed to replace complex switched discrete filter architectures by integrating multiple filter stages and drivers into a single compact surface-mount package. The device is manufactured by Analog Devices Inc., formerly associated with Hittite Microwave Corporation.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. Designers should evaluate other Analog Devices programmable filters based on bandwidth and channel count requirements.

FAQ

What is the typical accuracy of the 3dB corner frequency after power-on reset?

For unprogrammed parts, the typical accuracy is +/- 20%. For pre-programmed parts, the accuracy is +/- 2.5% with respect to the programmed bandwidth.

How is the filter bandwidth calibrated?

Calibration is accomplished using a reference clock signal applied to the CalCK pin, with frequencies ranging from 20 MHz to 80 MHz.

Does the device support a bypass mode?

Yes, the HMC900LP5E includes a filter bypass option that provides approximately 100 MHz bandwidth while retaining gain setting and common mode control.