Analog Devices Inc. 110387-HMC453ST89

Overview

HMC453ST89 from Analog Devices (formerly Hittite Microwave) is a GaAs InGaP HBT 1.6 W RF power amplifier optimized for 0.4–2.2 GHz operation in cellular, PCS, 3G, and fixed wireless infrastructure. It delivers +32.5 dBm saturated output power, 20.5 dB gain at 400 MHz, 7.5 dB gain at 2100 MHz, +49 dBm output IP3 at 2.1 GHz, and 41% PAE - all from a single +5 V supply in an SOT-89 package.

For engineers reviewing the HMC453ST89 datasheet, HMC453ST89 pinout, HMC453ST89 application, or HMC453ST89 equivalent, this page provides verified specifications, thermal and RF performance context, SOT-89 terminal mapping, real-world use cases in CDMA2000 and W-CDMA base stations, and validated alternative options for frequency-agile power amplification stages.

Technical Context

The HMC453ST89 employs a monolithic GaAs InGaP HBT process with integrated bias network and DC-coupled RFIN. Its broadband matching supports operation across five discrete bands (400–410, 450–496, 810–960, 1710–1990, and 2010–2170 MHz), with gain variation under ±0.02 dB/°C and stable P1dB (29–32.5 dBm) and Psat (32–32.75 dBm) across temperature.

It achieves high linearity via optimized collector biasing and on-die thermal management, with junction-to-paddle thermal resistance of 17.1 °C/W. The device requires external passive matching (e.g., 47 nH L1, 8.2 pF C2/C3 per 400 MHz reference circuit) and mandates RF grounding of pins 2 and 4 plus the exposed paddle.

Key Specifications

Pinout & Package

The HMC453ST89 is housed in an industry-standard SOT-89 package with exposed thermal paddle. All ground pins (2 and 4) and the paddle must be soldered to PCB RF ground using multiple vias for optimal thermal and RF performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar RF power amplifier applications.

Compared with QPA2211 and HMC452ST89, the HMC453ST89 uniquely balances 1.6 W output, +49 dBm IP3, and SOT-89 compatibility across 0.4–2.2 GHz - making it optimal for mid-tier macrocell drivers and fixed wireless units where board area and single-supply simplicity are critical.

Availability

HMC453ST89 is available at Aetrix Electronics and suitable for cellular infrastructure, fixed wireless access, and CDMA2000 base station designs requiring stable component supply, consistent RF performance, and long-term obsolescence management.

Supply support for HMC453ST89 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 acquired Hittite Microwave in 2014 and integrates its high-frequency RF portfolio into mission-critical communications solutions.

The HMC453ST89 belongs to the Hittite Microwave RF power amplifier product line, designed specifically for broadband, high-efficiency, high-linearity amplification in wireless infrastructure and defense systems.

FAQ

What is the maximum RF input power rating for the HMC453ST89?

The HMC453ST89 has an absolute maximum RF input power rating of +32 dBm at +5 Vdc supply. Exceeding this level risks permanent damage to the InGaP HBT transistor. For reliable operation, input drive should be limited to ≤+10 dBm in linear mode or ≤+20 dBm in compressed operation, per the 400 MHz application circuit guidelines.

Does the HMC453ST89 require external bias sequencing or startup control?

No, the HMC453ST89 operates with a single +5 V supply applied directly to pin 3 (RFOUT), eliminating need for external bias sequencing. Its internal bias network stabilizes quiescent current at 725 mA without external control circuitry - simplifying design for rapid prototyping and production deployment of the HMC453ST89.

Can the HMC453ST89 be used in 5G sub-6 GHz bands such as 3.5 GHz?

No - the HMC453ST89 is specified only up to 2.2 GHz. Its gain drops below 6 dB and output power degrades significantly above 2.17 GHz. For 3.5 GHz 5G NR applications, Analog Devices recommends the HMC1099LP5E or Qorvo QPA9121, which are validated through 3.8 GHz and maintain >30% PAE.

What thermal management is required for continuous operation of the HMC453ST89 at full power?

At 725 mA and +5 V, the HMC453ST89 dissipates ~3.6 W. With a junction-to-paddle thermal resistance of 17.1 °C/W, a 20 °C rise above ambient requires ≥10 cm² of 2-oz copper ground plane with ≥8 thermal vias (0.3 mm diameter) connecting to inner/outer ground layers. An aluminum heat sink is recommended for ambient >60 °C.

Is the HMC453ST89 pin-compatible with the HMC453ST89E RoHS variant?

Yes - the HMC453ST89 and HMC453ST89E share identical pinout, package dimensions, electrical specifications, and thermal characteristics. The only differences are lead finish (Sn/Pb vs. 100% matte Sn) and MSL rating (235 °C vs. 260 °C peak reflow), making them functionally interchangeable in both legacy and lead-free assembly processes.