Analog Devices Inc. 103155-HMC230MS8

Overview

HMC230MS8 from Analog Devices (formerly Hittite Microwave) is a GaAs MMIC 3-bit digital attenuator in an 8-lead MSOP package, operating from 0.75 to 2.0 GHz with 4 dB LSB steps (4/8/16 dB), 28 dB total attenuation range, ±0.5 dB typical bit error, and <2 dB insertion loss at 1.7 GHz - used for precision RF gain control in cellular base station transmit chains.

For engineers reviewing the HMC230MS8 datasheet, HMC230MS8 pinout, HMC230MS8 application, or HMC230MS8 equivalent, key selection criteria include its 3-bit positive-control interface, +3V to +5V single-supply biasing, 50 µA per control input, IIP3 up to +48 dBm, and MSOP-8 surface-mount compatibility with RF PCB layout best practices.

Technical Context

The HMC230MS8 implements a monolithic GaAs MMIC architecture with three independent CMOS-compatible control inputs (V1/V2/V3) selecting discrete attenuation states via integrated FET switching networks. Each bit toggles between 0 V and Vdd (3–5 V), enabling 8 distinct attenuation levels without external logic translation.

It features DC-coupled RF ports requiring external blocking capacitors (C1/C2), a single Vdd bias applied through a 5 kΩ series resistor, and ground-signal-ground RF layout alignment optimized for 50 Ω microstrip routing. Absolute max RF input power is +26 dBm, with operation validated from –40°C to +85°C.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (Mini Small Outline Package), 3.0 mm × 3.0 mm body, 0.65 mm lead pitch, Sn/Pb lead finish, MSL1 rating. Ground leads (Pins 2, 4, 6, 8) must be soldered directly to RF ground plane.

Key Features

Applications

Equivalent & Alternatives

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

Compared with HMC230MS8, HMC231MS8 trades broader attenuation resolution for slightly degraded linearity and efficiency, while QM11036 offers wider bandwidth and lower cost at the expense of GaAs-level IIP3 and temperature stability - making HMC230MS8 optimal for infrastructure-grade linearity and repeatability.

Availability

HMC230MS8 is available at Aetrix Electronics and suitable for cellular infrastructure, PCS/ISM wireless access points, and WLL handset RF front-ends requiring stable component supply and long-term lifecycle support.

Supply support for HMC230MS8 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, integrating its high-performance RF/Microwave IC portfolio into ADI's Communications & RF Solutions group.

The HMC230MS8 belongs to Hittite's legacy GaAs MMIC digital attenuator family, designed specifically for broadband RF gain control in licensed wireless infrastructure with emphasis on linearity, repeatability, and temperature stability.

FAQ

What is the recommended DC blocking capacitor value for HMC230MS8 RF ports?

For HMC230MS8, use 100–300 pF chip capacitors (e.g., 0402 X7R) on both RF1 and RF2 ports. Select the highest value within this range that supports your lowest operating frequency - for example, 300 pF enables full 0.75 GHz passband with minimal insertion loss. Avoid ceramic types with strong voltage coefficients.

Does HMC230MS8 require external bias sequencing or power-up timing constraints?

No - HMC230MS8 has no strict bias sequencing requirement. Vdd (+3V to +5V) and control voltages (V1/V2/V3) may be applied simultaneously. The device draws <50 µA per control input and operates immediately upon valid logic levels; no startup delay or initialization sequence is needed for HMC230MS8.

Can HMC230MS8 operate reliably at 3.3 V supply voltage?

Yes - HMC230MS8 is fully specified at Vdd = +3V to +5V. At 3.3 V, it delivers +45 dBm IIP3, 1.7 dB typ. insertion loss (0.75–1.7 GHz), and maintains ±0.4 dB bit error across all attenuation states, making it suitable for mixed-signal 3.3 V systems without level shifters.

Is HMC230MS8 pin-compatible with the AA100-59 digital attenuator?

Yes - per the original Hittite documentation, HMC230MS8 is a pin-for-pin replacement for the AA100-59 digital attenuator. Both use identical MSOP-8 footprints, RF1/RF2/Vdd/GND pin assignments, and 3-bit positive-control logic mapping, enabling drop-in substitution without PCB modification.

What is the maximum RF input power HMC230MS8 can handle before damage?

HMC230MS8 has an absolute maximum RF input power rating of +26 dBm across 0.75–2.0 GHz. Operation above this level risks permanent GaAs FET degradation. For reliable 0.1 dB compression performance, limit input to +20 dBm at 5 V or +19 dBm at 3 V - values confirmed in the HMC230MS8 datasheet.