**LTC1564IG#PBF: A High-Performance, Low Noise 10th Order Elliptic Lowpass Filter IC**
In the realm of analog signal processing, achieving high-performance filtering in a compact and reliable form factor has always been a significant challenge. The **LTC1564IG#PBF** from Analog Devices stands as a monumental solution, integrating a complete **10th order elliptic lowpass filter** into a single integrated circuit. This device is engineered for applications demanding exceptional stopband rejection and a sharp transition band, all while maintaining remarkably low noise and power consumption.
The defining characteristic of the LTC1564IG#PBF is its sophisticated internal architecture. Unlike filter designs built from discrete op-amps and passive components, this IC delivers a precise and stable **10th order elliptic (Cauer) response**. This type of response is renowned for providing the sharpest possible roll-off for a given order, which is critical for effectively separating signals in frequency-dense environments. The filter's -3dB cutoff frequency is user-adjustable from **10kHz to 150kHz** using a single external resistor, offering tremendous flexibility for various system requirements without altering the filter's shape or characteristics.
Performance is where the LTC1564IG#PBF truly excels. It features an outstanding **stopband rejection of 74dB minimum**, ensuring that unwanted out-of-band signals are effectively attenuated. Furthermore, it boasts an ultra-low **input-referred noise of just 3.5µVrms** typical (for a 100kHz cutoff), preserving the integrity of delicate signals. Its linear performance is exceptional, with a typical **total harmonic distortion (THD) of -80dB** at 50kHz, making it suitable for high-fidelity audio and precision measurement systems. The device operates on a single **5V supply** but is also capable of dual supply operation, drawing a mere 7.5mA of current, which underscores its efficiency.
The integration level of this filter IC simplifies design-in immensely. It eliminates the need for complex calculations, component matching, and sensitivity analysis associated with active RC filters. This not only accelerates time-to-market but also enhances overall system reliability by reducing the component count and board space required.
Typical applications are vast and include:
* **Anti-aliasing and reconstruction filters** for high-resolution data acquisition systems and DACs.
* **Communication systems** for channel selection and noise filtering.
* **Medical instrumentation** and seismic equipment where low noise and high precision are paramount.
* **Audio processing** equipment requiring sharp roll-off and low distortion.
**ICGOODFIND**
The LTC1564IG#PBF is an unparalleled integrated solution for designers seeking a no-compromise, high-order analog filter. It masterfully combines the superior roll-off of an elliptic response with critically low noise and distortion, all within a simple-to-use, space-saving package. It effectively bridges the gap between bulky discrete implementations and the limited flexibility of switched-capacitor filters, establishing itself as the premier choice for demanding analog filtering tasks.
**Keywords:**
LTC1564IG#PBF, 10th Order Elliptic Filter, Low Noise, Anti-aliasing Filter, Stopband Rejection
