Analog Devices Inc. HMC603MS10ETR

Overview

HMC603MS10ETR from Analog Devices (formerly Hittite Microwave) is a GaAs MMIC 5-bit digital attenuator with 0.5 dB LSB steps, operating from 0.7 to 3.8 GHz in an MSOP-10 surface-mount package. It delivers ≤2.0 dB typical insertion loss, ±0.15 dB typical bit error, +50 dBm IIP3, and supports single positive control per bit (0/+3–5 V) with <1.0 µA input current per control line. It is used in RF front-end gain control for cellular infrastructure and broadband wireless transceivers.

For engineers reviewing the HMC603MS10ETR datasheet, HMC603MS10ETR pinout, HMC603MS10ETR application, or HMC603MS10ETR equivalent, key selection criteria include its 15.5 dB attenuation range, frequency-dependent return loss (≥12 dB up to 3.8 GHz), low switching time (1.6 µs), and RoHS-compliant matte Sn lead finish in MSL1 packaging.

Technical Context

The HMC603MS10ETR implements a monolithic GaAs MMIC architecture with five independent CMOS-compatible control inputs driving discrete attenuation bits (0.5/1/2/4/8 dB). Its RF path is DC-coupled at both RF1 and RF2 ports, requiring external AC-blocking capacitors (100–300 pF), and bias is supplied via a single +3 to +5 V rail through a 5 kΩ series resistor on Pin 6 or Pin 10.

It operates across –40°C to +85°C with ESD sensitivity rated Class 1A (HBM), thermal resistance of 182°C/W, and absolute maximum RF input power of +30 dBm. Control logic uses active-high positive voltage toggling, with worst-case step error under ±0.6 dB across 0.5–4.0 GHz.

Key Specifications

Pinout & Package

Package: RoHS-compliant MSOP-10 (3.0 × 3.0 × 0.85 mm), matte Sn lead finish, MSL1, low-stress injection-molded plastic body. All ground pins (7–9) must be soldered directly to PCB RF ground plane.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital RF attenuator applications.

Compared with HMC603MS10TR and QM11036, the HMC603MS10ETR offers superior linearity (+50 dBm IIP3) and tighter bit accuracy (±0.15 dB) within its 0.7–3.8 GHz band, making it optimal for cellular infrastructure where spectral purity and gain stability are critical.

Availability

HMC603MS10ETR is available at Aetrix Electronics and suitable for cellular infrastructure, WiMAX front ends, and ISM-band test equipment requiring stable component supply, RoHS compliance, and MSL1 reflow capability.

Supply support for HMC603MS10ETR 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 IC portfolio into precision RF signal chain solutions for communications and defense markets.

The HMC603MS10ETR belongs to Analog Devices' legacy Hittite digital attenuator product line, designed specifically for high-linearity, low-error RF gain control in wireless infrastructure and broadband test systems.

FAQ

What is the maximum RF input power rating for the HMC603MS10ETR?

The HMC603MS10ETR has an absolute maximum RF input power rating of +30 dBm across 0.7–3.8 GHz. This rating applies under continuous-wave conditions with proper thermal management; derating is recommended above +28 dBm in sustained high-power operation to maintain reliability and avoid channel temperature exceedance beyond 150°C.

Does the HMC603MS10ETR require external DC blocking capacitors?

Yes, the HMC603MS10ETR requires external DC blocking capacitors on both RF1 (Pin 10) and RF2 (Pin 6) because its RF ports are DC-coupled. Recommended values are 100–300 pF, selected based on the lowest operating frequency to ensure minimal insertion loss and adequate high-pass cutoff.

What is the control voltage logic convention used by the HMC603MS10ETR?

The HMC603MS10ETR uses positive control logic: a logic HIGH (Vdd ± 0.2 V) enables each attenuation bit, and a logic LOW (0–0.2 V) disables it. Each control input draws ≤0.5 µA at HIGH and ≤1.0 µA at LOW, enabling direct interface with standard 3.3 V or 5 V GPIOs without buffering.

How does the HMC603MS10ETR handle bias supply?

The HMC603MS10ETR requires a single +3 to +5 V DC bias (Vdd) applied through an external 5 kΩ resistor to either Pin 6 or Pin 10. This resistor limits current and provides proper decoupling; typical supply current is 4–5 µA at +3 V or +5 V respectively, measured at the Vdd node.

Is the HMC603MS10ETR pin-compatible with the HMC603MS10TR?

Yes, the HMC603MS10ETR is pin-compatible with the HMC603MS10TR - both share identical MSOP-10 pinout, electrical specifications, and functional behavior. The sole difference is lead finish (matte Sn vs. Sn/Pb) and MSL reflow profile (260°C vs. 235°C peak), requiring no PCB layout change for RoHS migration.