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LTC6945IUFD#TRPBF

Name: LTC6945IUFD#TRPBF
Rating: 4.7 (12 reviews)

IC SYNTHESIZER INTEGER N 28QFN

製造商
製造商。部分 #LTC6945IUFD#TRPBF
包 28-WFQFN Exposed Pad
資料表
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規格

Supplier	Analog Devices Inc.
Package	Tape & Reel (TR)
ProductStatus	Obsolete
PLL	Yes
Input	Clock
Output	Clock
NumberofCircuits	1
Ratio-Input:Output	1:1
Differential-Input:Output	Yes/Yes
Frequency-Max	6GHz
Divider/Multiplier	Yes/No
Voltage-Supply	3.15V ~ 5.25V
OperatingTemperature	-40°C ~ 105°C
MountingType	Surface Mount
Package/Case	28-WFQFN Exposed Pad

概述

Description

The LTC6945IUFD#TRPBF is Linear Technology (now Analog Devices) RF frequency synthesizer. It’s a high-performance, digitally controlled PLL (fractional-N) used to generate precise RF outputs for wireless, radar, and instrumentation front-ends. The device accepts a reference clock and uses programmable dividers and a fractional-N modulator to cover a wide output frequency range with low phase noise. Control is via a serial interface (SPI-like), and it typically offers features such as lock detect, power-down, and configurable output drive.
Suffix meaning (brief): IUFD denotes the device grade/package (industrial temperature variant with a specific package). #TRPBF indicates Tape-and-Reel Pb-free packaging. In short, LTC6945IUFD#TRPBF is the industrial-temp, Pb-free, tape-and-reel version of the LTC6945 RF synthesizer.

Features

Here are the typical features of LTC6945IUFD#TRPBF (RF PLL Synthesizer):
- Wideband fractional-N PLL synthesizer with integrated VCO
- Programmable reference/divider and feedback/divider with fractional control
- Low jitter and low phase noise suitable for RF/microwave apps
- Multiple RF outputs with selectable buffering/drive options
- Integrated charge pump, phase detector, and loop filter basics
- Serial interface (SPI) for register-based control
- Lock detect output and programmable lock time
- Power-down mode for reduced power consumption
- Temperature-stable operation with robustness for industrial use
- RoHS-compliant, available in LTC packaging (IUFD) with tape-and-reel TRPBF
Note: For exact electrical specs (frequency range, jitter, spurs, supply voltage, and package pinout), please consult the official LTC6945 datasheet.

Package

LTC6945IUFD#TRPBF uses a 16-pin QFN (4x4 mm) package with an exposed pad. The #TRPBF suffix indicates Tape‑and‑Reel, Pb‑free packaging.

Pinout

- Pin count: 20 pins (LFCSP-20; package code in the part number indicates 20-pin, Pb-free, tape-and-reel).
- Function: High-performance RF frequency synthesizer / PLL with integrated VCO for generating stable RF clocks; requires external reference, feedback, and output network.

Manufacturer

Analog Devices, Inc. (ADI). The LTC6945 originated with Linear Technology, which was acquired by Analog Devices in 2017; the current manufacturer is Analog Devices.
ADI is a multinational semiconductor company that designs and manufactures analog, mixed-signal, and digital signal processing (DSP) integrated circuits.

Application

Application areas for LTC6945IUFD#TRPBF:
- RF/microwave transceivers and front-ends (LO generation, fractional-N synthesis)
- Wireless infrastructure (cellular base stations, small cells, microwave links)
- Radar, navigation, and satellite communications
- Test and measurement equipment and lab instrumentation needing high-resolution, low-noise frequency synthesis
- Any compact system requiring integrated PLL/DCO with low jitter

Equivalent

There isn’t an exact one-to-one cross for LTC6945IUFD#TRPBF. For Analog Devices substitutes, consider:
- ADF4350/ADF4351 (fractional-N PLLs)
- ADF5355/ADF5356 (wideband RF synthesizers)
Choose based on required frequency range, integration, and SPI interface. Use ADI’s cross-reference tool or your distributor to confirm packaging and availability for the exact variant (IUFD#TRPBF).