Analog Devices Inc./Maxim Integrated MAX2202EWT+T

Overview

MAX2202EWT+T from Maxim Integrated is an RMS power detector IC designed for RF power monitoring in cellular infrastructure and handset front-ends, operating from 800MHz to 2.0GHz with -29dBm to 0dBm detection range, 33mV/dB (typ) log slope, and ±0.4dB temperature-induced detection error over -40°C to +85°C - deployed in WCDMA base station transmit power control loops.

For engineers reviewing the MAX2202EWT+T datasheet, MAX2202EWT+T pinout, MAX2202EWT+T application, or MAX2202EWT+T equivalent, key selection criteria include RMS accuracy under WCDMA modulation, single-supply operation from 2.5V–4.2V, 6-bump WLP footprint compatibility, and enable-controlled shutdown for dynamic power management in LTE/WCDMA transceivers.

Technical Context

The MAX2202EWT+T implements a true-RMS detection architecture optimized for wideband CDMA signals, delivering linear-in-dB output voltage across its full -29dBm to 0dBm input range without dependence on signal crest factor. It uses internal calibration at four points (-29dBm, -19dBm, -7dBm, -1dBm) to maintain log conformance within ±1.0dB over 10dB input steps.

Its ENA pin integrates logic-level enable/disable control with internal 50kΩ GND pull-down, supporting low-quiescent shutdown current (≤10µA), while FILT provides access to an internal filtering node for external RC optimization - critical for minimizing ripple in ADC-coupled feedback paths of closed-loop PA control systems.

Key Specifications

Pinout & Package

MAX2202EWT+T is housed in a 6-bump wafer-level package (WLP) measuring 1.2mm × 0.8mm with 0.4mm bump pitch, requiring standard reflow assembly and compatible with high-density RF PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar RMS power detection applications.

Compared with ADL5511ACPZ-R7 and LT5537IMS8#TRPBF, the MAX2202EWT+T delivers superior WCDMA-specific RMS accuracy (±0.1dB), smallest footprint (1.2mm × 0.8mm), and lowest quiescent current in its class - making it the preferred choice for compact, temperature-stable cellular PA control where 800MHz–2GHz coverage is sufficient.

Availability

MAX2202EWT+T is available at Aetrix Electronics and suitable for LTE baseband subsystems, WCDMA femtocell RF modules, and cdma2000 mobile terminal power control circuits requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MAX2202EWT+T 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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and RF ICs for communications, industrial, and consumer applications.

The MAX2202EWT+T belongs to Maxim's precision RF power detector product line, engineered specifically for cellular infrastructure and mobile terminal transmit power control where RMS accuracy, temperature stability, and ultra-small packaging are critical design requirements.

FAQ

What is the RF input frequency range supported by the MAX2202EWT+T?

The MAX2202EWT+T operates from 800MHz to 2000MHz, covering key cellular bands including Cellular (824–960MHz), PCS (1850–1990MHz), and UMTS Band I (1920–2170MHz). Its S11 remains below -9dB across this range when paired with a 50Ω + 220pF input network, as verified in the device's AC electrical characteristics table and typical operating curves.

How does the MAX2202EWT+T achieve RMS accuracy under high-PAR signals like WCDMA?

The MAX2202EWT+T achieves ±0.1dB RMS accuracy under WCDMA modulation through a dedicated BiCMOS RMS core and factory calibration at four power points (-29dBm, -19dBm, -7dBm, -1dBm). This architecture inherently rejects waveform-dependent errors caused by peak-to-average ratios up to 9.8dB, eliminating the need for external correction algorithms in the MAX2202EWT+T signal path.

Can the MAX2202EWT+T be used with a 3.3V supply?

Yes, the MAX2202EWT+T supports supply voltages from +2.5V to +4.2V, making 3.3V fully compliant. At VCC = 3.3V, the device maintains full specification - including 33mV/dB log slope, -29dBm to 0dBm detection range, and ±0.4dB temperature error - as confirmed in the DC electrical characteristics table under "Supply Voltage" and "Supply Current" parameters.

What is the purpose of the FILT pin on the MAX2202EWT+T?

The FILT pin on the MAX2202EWT+T provides access to an internal filtering node that improves output voltage stability by suppressing residual amplitude ripple. It must be bypassed externally with a capacitor (e.g., 4.7nF for WCDMA, 15nF for NCDMA) placed as close as possible to the bump - a design requirement explicitly called out in the Applications Information section to ensure clean ADC input for precise power measurement.

Is the MAX2202EWT+T pin-compatible with other devices in the MAX22xx family?

No, the MAX2202EWT+T is not pin-compatible with other MAX22xx devices. Its 6-bump WLP configuration (A1, A2, B1, B2, C1, C2) and shared RFIN/ENA function on A1 are unique to this variant. The MAX2202EWT+T datasheet specifies no pin-to-pin alternatives, and layout files confirm distinct bump mapping - requiring dedicated PCB footprint design for the MAX2202EWT+T.