Analog Devices Inc. LTC5590IUH#TRPBF

Overview

LTC5590IUH#TRPBF from Analog Devices (formerly Linear Technology) is a dual-channel, high-dynamic-range, downconverting RF mixer IC optimized for 600MHz–1.7GHz RF input and 700MHz–1.5GHz LO frequencies. It delivers 8.7dB conversion gain, 26dBm IIP3, and 9.7dB noise figure at 900MHz, enabling high-selectivity LTE/GSM receiver front-ends with lossy IF filtering and minimal board space.

For engineers reviewing the LTC5590IUH#TRPBF datasheet, LTC5590IUH#TRPBF pinout, LTC5590IUH#TRPBF application, or LTC5590IUH#TRPBF equivalent, this page provides verified circuit role, validated pin functions, confirmed RF/LO/IF performance boundaries, thermal and supply current behavior across temperature, and real-world substitution guidance for wireless infrastructure designs.

Technical Context

The LTC5590IUH#TRPBF integrates two independent passive double-balanced mixer cores, each with dedicated LO buffer amplifiers, differential IF amplifiers, and bias/enable circuitry. Its RF and LO inputs are single-ended and internally matched to 50Ω across operating bands, supporting both high-side and low-side LO injection without external matching networks.

Each channel features independent enable control (ENA/ENB), a shared low-current mode select (ISEL), and transformer-coupled RF/LO inputs with center-tap bias pins (CTA/CTB) for IIP3 optimization. The IF outputs are open-collector differential (IFA±/IFB±), requiring external termination or transformer coupling to achieve 50Ω single-ended IF output.

Key Specifications

Pinout & Package

24-lead (5mm × 5mm) plastic QFN package with exposed thermal pad (Pin 25 = GND). Requires soldering exposed pad to PCB ground plane for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual downconverting mixer applications.

Compared with HMC1040LP4CE and MAX19997AETX+, the LTC5590IUH#TRPBF uniquely combines 600–1700MHz RF coverage, integrated IF amplifiers, and 26dBm IIP3 in a compact 5×5mm QFN-making it optimal for space-constrained, high-performance cellular infrastructure receivers.

Availability

LTC5590IUH#TRPBF is available at Aetrix Electronics and suitable for LTE base station diversity receivers, MIMO infrastructure front-ends, and high-dynamic-range spectrum analyzers requiring stable component supply and long-term production continuity.

Supply support for LTC5590IUH#TRPBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and RF ICs, formed through the acquisition of Linear Technology in 2017.

The LTC5590IUH#TRPBF belongs to ADI's high-dynamic-range RF mixer family, designed specifically for wireless infrastructure receivers demanding exceptional linearity, low noise, and thermal robustness in outdoor and high-density deployment scenarios.

FAQ

What is the recommended LO drive level for optimal performance of the LTC5590IUH#TRPBF?

The LTC5590IUH#TRPBF is optimized for 0dBm LO drive across its 700–1500MHz range. It maintains specified performance over –4dBm to +6dBm, but gain flatness and IIP3 degrade outside ±3dBm. At 0dBm, the LTC5590IUH#TRPBF achieves 8.7dB conversion gain and 26dBm IIP3 at 900MHz with minimal spurious generation.

Can the LTC5590IUH#TRPBF operate with a 5V IF supply while using 3.3V for the mixer core?

Yes-the LTC5590IUH#TRPBF supports independent supply rails: VCCA/VCCB (3.1–3.5V) for mixer/LO circuits and VCCIF (3.1–5.3V) for IF amplifiers. Using 5V on VCCIF increases input P1dB by ~3.5dBm at 900MHz (from 10.4dBm to 14.1dBm), improving blocking resilience without affecting RF/LO performance.

How does the LTC5590IUH#TRPBF handle LO leakage into the RF and IF ports?

The LTC5590IUH#TRPBF achieves <–36dBm LO-to-RF leakage and <–26dBm LO-to-IF leakage across its operating bands. This is enabled by balanced passive mixer topology and internal LO buffer isolation. Measured at 900MHz RF and 1090MHz LO, these levels prevent LO radiation from desensitizing upstream LNAs or contaminating downstream IF filters.

Is external matching required for the RF and LO inputs of the LTC5590IUH#TRPBF?

No-RF and LO inputs are internally matched to 50Ω when the LO is driven at 0dBm within 700–1500MHz. A single series DC-blocking capacitor (e.g., 100pF for RF, 10pF for LO) suffices. Matching remains >12dB return loss from 700–1400MHz RF and 700–1500MHz LO without additional components.

What is the function of the CTA and CTB pins on the LTC5590IUH#TRPBF?

CTA (Pin 2) and CTB (Pin 5) are RF transformer secondary center-taps, biased at 1.2V. Adding a bypass capacitor (e.g., 10–100pF) to ground can improve IIP3 in some frequency bands. These pins must be DC-isolated from ground and VCC; improper connection degrades linearity and may damage bias circuitry.