Analog Devices Inc./Maxim Integrated MAX2244EBL

Overview

MAX2244EBL from Maxim Integrated is a 2.4GHz–2.5GHz single-supply RF power amplifier IC designed for Bluetooth Class 1 radios, delivering 22dBm peak output power with analog closed-loop power control, 0.5V–2.0V PC input voltage range, and ultra-chip-scale package (UCSP™, 1.56mm × 1.56mm, 9-bump). It integrates internal 50Ω input match, power detector, and automatic ramp-up/down circuitry to meet Bluetooth spurious emissions requirements.

For engineers reviewing the MAX2244EBL datasheet, MAX2244EBL pinout, MAX2244EBL application, or MAX2244EBL equivalent, this page provides verified technical context, validated pin functions, confirmed Bluetooth Class 1 and 802.11 FHSS use cases, and two rigorously cross-referenced alternative parts with documented functional and supply-current differences.

Technical Context

The MAX2244EBL implements a three-stage nonlinear PA architecture with adjustable-gain first stage and fixed-gain second/third stages. Its closed-loop control system compares internal power-detector output against analog PC voltage to dynamically adjust first-stage gain-ensuring stable 22dBm output across ±40°C to +85°C, 3.0V–3.6V VCC, and 0dBm–4dBm RFIN variations.

It features dual-function RFIN/SHDN pin (50Ω internally matched RF input + CMOS-level shutdown), open-collector RFOUT requiring external pullup inductor and lowpass matching network, and separate VCC1/VCC2 biasing for stage-specific optimization. Harmonic suppression is achieved via integrated output-matching network acting as 2nd/3rd harmonic filter.

Key Specifications

Pinout & Package

MAX2244EBL uses a 9-bump ultra chip-scale package (UCSP™) with 0.5mm bump pitch and bottom-side interconnects. The package footprint requires 0.25mm round/square solder pads on 0.5mm centers, with 0.33mm solder mask opening.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX2245EBL and MAX2246EBL, the MAX2244EBL delivers optimal balance of 22dBm output and moderate supply current (205mA max), making it ideal for mainstream Bluetooth Class 1 designs where both range and battery life are critical.

Availability

MAX2244EBL is available at Aetrix Electronics and suitable for Bluetooth Class 1 radios, 802.11 FHSS transceivers, and 2.4GHz cordless phone systems requiring stable component supply, consistent RF performance, and long-term production continuity.

Supply support for MAX2244EBL 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

Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and RF solutions for communications, computing, and industrial markets.

The MAX2244EBL belongs to Maxim's Bluetooth/ISM-band RF power amplifier product line, engineered specifically for compact, low-voltage, closed-loop controlled Class 1 radio systems operating in the 2.4GHz–2.5GHz band.

FAQ

What is the exact peak output power specification for MAX2244EBL?

The MAX2244EBL delivers a guaranteed 22dBm peak output power at VPC = 2.0V, TA = +25°C, and VCC = 3.0V–3.6V. This value is maintained across -40°C to +85°C and 0dBm–4dBm input power range due to its closed-loop control architecture. At VPC = 0.5V, output drops to ~7dBm, providing >20dB analog power control range. The 22dBm output compensates for typical front-end filter losses to ensure 20dBm reaches the antenna.

Does MAX2244EBL require external input matching components?

No, MAX2244EBL does not require external input matching components. Its RFIN/SHDN pin features an integrated 50Ω input match optimized for the 2.4GHz–2.5GHz band. This eliminates discrete matching networks, reduces PCB area, and improves repeatability across manufacturing lots. External DC blocking (e.g., 10pF capacitor) is still required when interfacing with AC-coupled RF sources to prevent corruption of the SHDN function.

What is the shutdown current of MAX2244EBL and how is shutdown activated?

The MAX2244EBL draws only 0.5µA in shutdown mode when the RFIN/SHDN pin is held at ≤0.6V (logic low). Shutdown is activated by applying a valid CMOS low-level signal through a 1kΩ series resistor to the RFIN/SHDN pin. During shutdown, RFOUT is disabled, internal bias is cut, and the control loop is inactive-enabling ultra-low-power standby in battery-operated Bluetooth devices.

Can MAX2244EBL be used in 802.11b/g applications?

Yes, MAX2244EBL is explicitly qualified for 802.11 FHSS (Frequency-Hopping Spread Spectrum) radios operating in the 2.4GHz–2.5GHz ISM band. Its 22dBm output, fast ≤4µs power ramping, and harmonic suppression (≤-13dBm at 2fO/3fO) meet 802.11b/g spectral mask requirements. However, it is not optimized for OFDM-based 802.11g/n/ac modulation schemes requiring higher linearity-use only in FHSS or GFSK-modulated systems per datasheet validation.

What package type and dimensions does MAX2244EBL use?

MAX2244EBL uses a 9-bump ultra chip-scale package (UCSP™) measuring 1.56mm × 1.56mm with 0.5mm bump pitch. The package has bottom-side solder bumps arranged in a 3×3 grid (A1–C3), requiring 0.25mm diameter solder pads on 0.5mm centers and 0.33mm solder mask openings. This UCSP footprint reduces board area by >60% versus equivalent QFN packages while supporting high-frequency RF routing and thermal dissipation up to 700mW.