**LTC1069-6CS8#PBF: A 5th Order, Lowpass Switched Capacitor Filter IC**

In the realm of analog signal processing, the extraction of a clean, desired signal from a noisy environment is a fundamental challenge. The **LTC1069-6CS8#PBF** from Analog Devices represents a highly integrated and effective solution for this task, offering a complete **5th order, lowpass switched capacitor filter** in a compact 8-pin SOIC package. This device exemplifies the power and convenience of monolithic filter design, eliminating the need for complex passive component calculations and the associated board space.

The core of the LTC1069-6's operation lies in its **switched capacitor technology**. Unlike traditional continuous-time filters that rely on fixed resistors and capacitors, this technique uses capacitors and switches that are clocked at a high frequency to simulate resistor behavior. The key advantage of this method is that the filter's critical frequency is **precisely proportional to the external clock frequency**. This allows for easy and accurate tuning of the cutoff frequency over a wide range (from 0.1Hz to 50kHz) simply by adjusting the clock signal, without altering any external passive components. The LTC1069-6 is configured for a Butterworth response, providing maximum passband flatness for applications where preserving the amplitude of signals within the passband is crucial.

Housed in the **CS8 package**, this IC is designed for robustness and ease of use in a standard surface-mount assembly process. It requires a minimal number of external components—typically just a single clock and a few capacitors—to form a complete filtering system. This significantly reduces design time, component count, and overall PCB area. The device operates from a single supply voltage ranging from +4.75V to +16V, or from dual supplies of ±2.38V to ±8V, making it versatile for various system-level requirements.

The applications for the LTC1069-6CS8#PBF are extensive. It is ideally suited for **anti-aliasing filters** in data acquisition systems, preventing higher-frequency signals from distorting the sampled data. It is equally effective as a **post-DAC reconstruction filter**, smoothing the stair-step output of digital-to-analog converters. Furthermore, it finds use in communications equipment, test and measurement instruments, and any audio processing system where precise, tunable lowpass filtering is needed.

**ICGOODFIND:**

The LTC1069-6CS8#PBF is a quintessential example of a dedicated, application-specific integrated circuit that simplifies complex analog design. Its **clock-tunable frequency response**, **high integration level**, and **Butterworth characteristic** make it an superior choice over discrete active filter implementations. For engineers seeking a reliable, compact, and performance-guaranteed solution for lowpass filtering, this IC remains a compelling option.

**Keywords:**

1. **Switched Capacitor Filter**

2. **Lowpass Filter**

3. **Clock-Tunable**

4. **Fifth Order**

5. **Anti-aliasing**