Dual Filter provides matched response.
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Press Release Summary:
Model LT1568 ultra low noise (92 dB SNR) filter provides one pair of matched second order filter sections integrated on one chip. Matched filter response, gain, and phase repeatability from channel to channel is suited for I/Q applications. Internal passive and active circuitry is precisely trimmed for predictable and repeatable performance. Offered with single-ended or differential outputs, unit may be used as dual matched 2nd or 3rd order lowpass filter.
Original Press Release:
Ultra Low Noise 200kHz to 10MHz Dual Filter Provides Matched Response
MILPITAS, CA - May 2, 2003 - Linear Technology Corporation introduces the LT1568, an ultra low noise (92dB SNR), high frequency filter building block for channel antialiasing or reconstruction applications. The LT1568 provides a pair of matched second order filter sections integrated on a single chip. The matched filter response, gain and phase repeatability from channel to channel is critical for I/Q applications. The internal passive and active circuitry is precisely trimmed for predictable and repeatable performance, otherwise difficult to obtain with conventional discrete solutions.
"The LT1568 was conceived to satisfy modern analog filtering demands in high speed applications," said design manager, Nello Sevastopoulos. "It achieves what system designers expect: low noise and repeatable performance from part to part."
The LT1568 features differential outputs, making it suitable for single-ended to differential conversion and driving high-speed A/D converters. The device can be used as a dual matched 2nd or 3rd order lowpass filter. Achieving 4th order or higher response is as simple as cascading the two internal 2nd order sections. Various lowpass or bandpass responses such as Butterworth, Chebyshev, Bessel or elliptic can be easily implemented.
The LT1568 operates from a single 3V to ±5V supplies and has a power shutdown pin. Offered in the 16-pin narrow body SSOP package that occupies the footprint of an SO-8, the LT1568 is available for operation over the commercial and industrial temperature ranges. Pricing starts at $4.25 each in 1,000-piece quantities.
Summary of Features: LT1568
· Up to 10MHz Center Frequency on a Single 3V Supply
· Easy to Use - Resistor Value Sets Cutoff Frequency
· Extremely Flexible - Lowpass, Bandpass, Notch
· SNR = 92dB (fc = 2MHz, 2VP-P)
· THD = -84dB (fc = 2MHz, 1VP-P)
· Matched Pair of 2-Pole or Single 4-Pole Response
· Single-Ended or Differential Output
· Operates from Single 3V to ±5V Supply
· Rail-to-Rail Input and Output Voltages
COMPANY BACKGROUND: Linear Technology Corporation was founded in 1981 as a manufacturer of high performance linear integrated circuits. Linear Technology products include operational, instrumentation and audio amplifiers; voltage regulators, power management devices, DC-DC converters and voltage references; comparators; monolithic filters; communications interface circuits; one-chip data acquisition sub-systems; pulse-width modulators and sample-and-hold devices; and high frequency devices. Applications for Linear Technology's high performance circuits include wireless and broadband telecommunications infrastructure, cellular telephones, networking products and satellite systems, notebook and desk top computers, computer peripherals, video/multimedia, industrial and medical instrumentation, automotive electronics, factory automation, process control, military and space systems, and high-end consumer products including digital cameras, MP3 players and other electronic products.
For more information, contact:
Doug Dickinson, Media Relations Manager
Linear Technology Corporation
1630 McCarthy Boulevard
Milpitas, CA 95035-7417
ddickinson@linear.com
408-432-1900
Call toll-free 1-800-4-LINEAR (for literature only), or go to the company's web site: www.linear.com
Note: LT and LTC are registered trademarks of Linear Technology Corp.
