深圳市华兴微电子有限公司 （非本站正式会员）

Features

• Low Noise: 6 dB NF
• High Linearity: Output IP3 +30 dBm
• Variable Gain: 0 to 40 dB
• High Bandwidth: DC to 100 MHz
• Precise Gain Accuracy: 0.5 dB Gain Step
• Excellent Magnitude & Phase Response
• Externally Controlled 
   Common Mode Output Level
• Parallel or Serial Gain Control
• Read/Write Serial Port Interface (SPI)
• 24 Lead 4x4 mm SMT Package 16 mm2
• Programmable Input Impedance
   (400Ω Differential or 100Ω Differential)

Typical Applications

• Baseband I/Q Transceivers
• Direct Conversion & 
   Low IF Transceivers
• Diversity Receivers
• ADC Drivers
• Adaptive Gain Control

Functional Diagram

General Description

The HMC960LP4E is a digitally programmable dual channel variable gain amplifier. It supports discrete gain steps from 0 to 40 dB in precise 0.5 dB steps. It features a glitch free architecture to provide exceptionally smooth gain transitions. The device has matched gain paths which provide excellent quadrature balance over a wide signal bandwidth.

The HMC960LP4E provides an SPI programmable input impedance of 100Ω differential or 400Ω differential (default).

Externally controlled common mode output feature enables the HMC960LP4E to provide a flexible output interface to other parts in the signal path. Gain can be controlled via either a parallel interface (GC[6:0]) or via the read/write serial port (SPI).

Housed in a compact 4x4mm (LP4) SMT QFN package, the HMC960LP4E requires minimal external components and provides a low cost alternative to more complicated switched amplifier architectures.