描述 Description

The QPC3614 is a 75 Ohm 6-bit digital step attenuator (DSA) that features high linearity over the entire 31.5 dB gain control range in 0.5 dB steps and has a low insertion loss of 1.2 dB at 1 GHz. The QPC3614 features three modes of control: serial, latched parallel, and direct parallel programming. Patented circuit architecture provides overshoot-free transient switching performance. QPC3614 is available in a 20-pin 4.2 mm x 4.2 mm x 0.90 mm QFN package.

特性 Features

? 6-Bit, 31.5 dB Range, 0.5 dB Step
? Patented Circuit Architecture
? Overshoot-free Transient Switching Performance
? Frequency Range 5 MHz - 1500 MHz
? High Linearity, IIP3 65 dBm Typical at 1 GHz
? Serial and Parallel Control Interface
? Fast Switching Speed, < 500 nsec Typical
? RF Pads Have No DC Voltage; Can be DC Grounded Externally
? Option to Turn Off Negative Voltage Generator and Supply VSS Externally
? Power-up Default Setting Is Maximum Attenuation

應(yīng)用 Application

? Optical Nodes
? Point-to-Point
? Pre-amplifier Attenuation
? Inter-stage Attenuation
? Return Attenuation
? AGC and Tilt Control