深圳市华兴微电子有限公司 （非本站正式会员）

Features

• Low Noise Figure: 12 dB
• High linearity: Output IP3 +30 dBm
• Programmable Bandwidth: 
   3.5 to 50 MHz
• Exceptional 3 dB 
   Bandwidth Accuracy: ±2.5%
• 6th order Butterworth 
   Magnitude & Phase Response 
• Automatic Filter Calibration
• Externally Controlled Common Mode 
   Output Level Simplifies Interface
• Read/Write Serial Port Interface (SPI)
• 32 Lead 5x5 mm SMT Package: 25 mm2

Typical Applications

• Baseband Filtering for A/D or 
   D/A Converters 
• Point-to-Point, Fixed Wireless &
   Cellular Base Station Transceivers
• Integrated Direct Conversion 
   Receiver (DCR) 
• Software Defined Radio Applications
• Test & Measurement Equipment

Functional Diagram

General Description

The HMC900LP5E is a 6th order, programmable bandwidth, fully calibrated, dual low pass filter. It features 0 or 10 dB input gain setting and supports arbitrary bandwidths from 3.5 to 50 MHz, and when calibrated, is accurate to ±2.5% of the desired bandwidth. It includes a filter bypass option with a bandwidth of 100 MHz, while retaining gain and common mode settings.

Housed in a compact 5x5mm SMT QFN package, the HMC900LP5E requires minimal external components and provides a low cost alternative to more complicated switched discrete filter architectures. Filter calibration for the HMC900LP5E is accomplished with any reference clock rate from 20 to 80 MHz. One time programmable (OTP) memory offers unsurpassed flexibility allowing the user "set and forget" parameters like gain, and bandwidth setting.

Matched filter paths provide excellent quadrature balance, making the HMC900LP5E ideal for I/Q communications applications. The 6th order Butterworth transfer function delivers superior stop band rejection while maintaining both a flat passband and minimal group delay variation.