Analog Devices Inc. DC2158A

Overview

DC2158A from Analog Devices (formerly Linear Technology) is a demonstration board for the LTC5596IDC, a high-accuracy 100MHz–40GHz RMS RF power detector IC. It features a 2.9mm SMK edge-mount connector, 50Ω input impedance, 35dB dynamic range (±1dB), 29mV/dB output slope, and operates from 3.3V supply with ≤40mA current draw - optimized for lab validation of millimeter-wave RF power measurement systems.

For engineers reviewing the DC2158A datasheet, DC2158A pinout, DC2158A application, or DC2158A equivalent, this demo board enables rapid characterization of wideband RMS detection performance up to 40GHz, calibration curve generation, crest factor tolerance verification (up to 12dB PAPR), and evaluation of filter-capacitor transient response tuning via C3 (10pF–1nF).

Technical Context

The DC2158A implements the LTC5596IDC in a fully matched 50Ω RF path, with microstrip trace design validated for operation up to 40GHz. Its RFIN node connects directly to the 2.9mm SMK jack (SRI 25-146-1000-93), eliminating external coupling capacitors when DC bias at RFIN remains ≤1.0V.

Power delivery uses turret terminals for VCC and EN, supporting controlled 3.3V ramp-up (≥1ms). The FLTR pin accepts optional interstage filtering (C3), while OUT provides buffered DC voltage proportional to input RF power - calibrated using linear regression with ≥2-point correction for ±0.5dB accuracy across frequency.

Key Specifications

Availability

DC2158A is available at Aetrix Electronics and suitable for RF test & measurement labs, 5G base station development, aerospace radar prototyping, and mmWave communications system validation requiring stable component supply and traceable evaluation hardware.

Supply support for DC2158A 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 Linear Technology in 2017 and maintains its high-performance analog and RF product lines. Linear Technology was founded in 1981 and specialized in precision analog ICs for demanding signal chain applications.

The DC2158A belongs to Linear Technology's demonstration circuit series for RF power management ICs, designed specifically to accelerate validation of ultra-wideband RMS detectors in production test and R&D environments.

FAQ

What is the primary function of the DC2158A demo board?

The DC2158A demo board hosts the LTC5596IDC RMS power detector IC and provides a fully characterized, 40GHz-optimized platform for measuring RF input power across 100MHz–40GHz. It delivers calibrated DC output voltage proportional to input power, enabling fast transfer curve generation and crest factor tolerance testing - critical for validating DC2158A in 5G and radar applications.

Does the DC2158A require external power supply sequencing?

Yes - the DC2158A requires controlled ramp-up of both VCC and EN to 3.3V simultaneously with ≥1ms minimum slew rate. Floating EN or fast transients may cause latch-up or inaccurate readings. The board uses turret terminals for clean, low-inductance connections to ensure stable DC2158A operation during RF characterization.

Can the DC2158A measure modulated signals with high peak-to-average power ratio?

Yes - the DC2158A supports crest factors up to 12dB, verified per LTC5596IDC specifications. This makes it suitable for evaluating real-world waveforms like OFDM, LTE, and 5G NR on the DC2158A without distortion or compression artifacts in the RMS output.

What RF connector is used on the DC2158A and why?

The DC2158A uses an SRI 25-146-1000-93 2.9mm edge-launch jack rated DC–40GHz. This connector ensures minimal insertion loss and return loss across the full band, preserving measurement fidelity - a key requirement for reliable DC2158A validation at millimeter-wave frequencies.

How is calibration performed on the DC2158A?

A minimum two-point calibration is required for DC2158A operation: measuring OUT voltage at two known input power levels (e.g., –10dBm and +5dBm) to compute slope and intercept. Linear regression improves accuracy, and optional C3 filtering (10pF–1nF) reduces ripple for stable DC2158A output under pulsed or burst-mode RF.