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Overview

The LTC5555IUFD is a programmable gain down-conversion mixer from 1.5GHz to 7GHz for receivers with precise gain setting ‌. The LTC5555IUFD contains an active mixer and a digital IF VGA with a gain control range of 15.5dB. The IF gain can be programmed in steps of 0.5dB via SPI or parallel interface.

The device has an enable pin for quick on-off and off-off. In addition, the LTC5555IUFD offers a power reduction mode.

The integrated RF transformer provides a single ended 50Ω input. Differential LO inputs are designed for single-ended or differential drives. The differential IF output simplifies the interface to the differential IF filter and amplifier. The LTC5555IUFD mixer is optimized for the 3GHz to 7GHz RF frequency range, but can be used at frequencies as low as 1.5GHz (with reduced performance).

Product characteristics

1. ‌ programmable gain control ‌

The LTC5555IUFD integrates digital IF VGA (Variable gain amplifier), supports a gain adjustment range of 15.5dB, and can precisely set the gain at 0.5dB step by step via SPI or parallel interface ‌.

Enable pin design to realize fast on-off and off, and support low power consumption mode, optimize system energy consumption ‌.

2, ‌ high performance mixer architecture ‌

The LTC5555IUFD uses an active mixer that covers the broad band 1.5GHz to 7GHz (3GHz-7GHz is optimized) and offers a single-ended 50Ω RF input for a variety of RF front-end designs ‌.

Differential LO (local oscillator) input compatible with single-ended/differential driver, differential IF (IF) output simplified filtering and amplification circuit interface ‌.

3, ‌ packaging and reliability ‌

The LTC5555IUFD is available in a QFN-28-EP (4mm×5mm) package for high density PCB layouts, meeting industrial temperature and reliability requirements ‌.

Typical application field

1. ‌ wireless communication infrastructure ‌

The LTC5555IUFD is widely used in base station receivers and repeater equipment in the 3.6GHz, 4.8GHz and 5.8GHz bands to improve signal chain gain stability ‌.

2. ‌ National Defense and Test equipment ‌

The LTC5555IUFD is suitable for high dynamic range scenarios such as military radars and tactical communication receivers to ensure signal integrity in complex electromagnetic environments ‌.

The high linearity of the LTC5555IUFD reduces measurement errors ‌ in test equipment such as spectrum analyzers and vector network analyzers.

‌3. Emerging technology scenarios ‌

Compatible with software-defined Radio (SDR) architecture, the LTC5555IUFD supports the flexible signal processing needs of 5G NR (new air interface) and iot terminals ‌.

LTC5555IUFD Key parameter

Frequency range: ‌ : 1.5GHz~7GHz (optimized frequency band 3GHz-7GHz) ‌.

Gain/loss ‌ : typical mixing gain 9dB, noise figure 13.8dB‌.

Power supply requirements ‌ : Supports 3.3V or 5V power supply, compatible with mainstream RF system design ‌.

Summary ‌ : With programmable gain, wide band coverage and high integration, LTC5555IUFD has become a core device in wireless communication, defense electronics and other fields. The flexible control interface and reliable package design of the LTC5555IUFD provide engineers with a high-performance RF front-end solution ‌.

For a quote on LTC5555IUFD products, please contact:

Official website: www.hkmjd.com

Email: sales@hkmjd.com

Tel: +86 13410018555 (Mr. Chen)