Analog Devices Inc. DC391A-A

Overview

DC391A-A from Analog Devices is a demonstration board designed to evaluate the LTC5505-1 and LTC5505-2 RF power detector ICs. It supports RF input frequencies from 300 MHz to 2700 MHz, accepts up to +18 dBm input power, delivers buffered DC output voltage at E2, and features configurable shutdown control via E4 and SW1 for enable/disable timing characterization.

For engineers reviewing the DC391A-A datasheet, DC391A-A pinout, DC391A-A application, or DC391A-A equivalent, this board enables rapid validation of RF power detection linearity, temperature stability, and enable/shutdown transient response in cellular front-end, spectrum analyzer, and RF power monitoring systems.

Technical Context

The DC391A-A implements a calibrated evaluation platform for two variants of the LTC5505 RF detector: the LTC5505-1 (optimized for 300–1000 MHz) and LTC5505-2 (optimized for 900–2700 MHz). Both share identical pinout, supply range (2.7 V to 6 V), shutdown interface (SHDN on pin 3), and buffered DC output architecture.

It provides direct access to critical test points: E1 (V_CC input), E2 (V_OUT measurement), E3 (GND), E4 (SHDN control), J1 (50 Ω SMA RF input), and SW1 (manual enable/disable toggle). No external components are required for basic operation beyond the onboard C1 (RF DC blocking capacitor).

Key Specifications

Availability

DC391A-A is available at Aetrix Electronics and suitable for RF front-end validation, cellular base station maintenance equipment, and portable spectrum analysis tools requiring stable component supply and documented evaluation infrastructure.

Supply support for DC391A-A 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 designs high-performance analog, mixed-signal, and RF ICs for precision signal processing across communications, industrial, and automotive markets.

The DC391A-A belongs to Analog Devices' Linear Technology demo board product line, developed specifically to accelerate RF power detector integration and performance verification in wireless infrastructure and test instrumentation.

FAQ

What is the primary function of the DC391A-A demo board?

The DC391A-A demo board is a ready-to-use evaluation platform for the LTC5505-1 and LTC5505-2 RF power detector ICs. It enables engineers to measure DC output voltage versus RF input power across 300 MHz–2700 MHz, characterize shutdown timing, and validate linearity without custom PCB design. The DC391A-A includes all necessary passive components, SMA input, and test points for immediate bench testing.

Which IC variants does the DC391A-A support, and how do they differ?

The DC391A-A supports both the LTC5505-1 (optimized for 300–1000 MHz) and LTC5505-2 (optimized for 900–2700 MHz). These variants share identical pinout and supply requirements but differ in internal compensation for frequency-dependent detector response. The DC391A-A board accommodates either IC without layout change - users select based on target RF band.

How is RF input connected to the DC391A-A?

RF input is connected to the DC391A-A via the SMA connector J1, which interfaces directly to pin 1 (RFIN) of the mounted LTC5505 IC. A 50 Ω impedance path is maintained through C1 (DC-blocking capacitor). For best practice, a 3 dB attenuator is recommended between the signal generator and J1 to minimize reflections - this configuration is explicitly noted in the DC391A-A Quick Start Guide.

Can the DC391A-A be used to measure enable and disable timing of the LTC5505?

Yes. The DC391A-A provides dedicated access to the SHDN pin (E4) for dynamic control. With SW1 set to enable, a pulse generator can drive E4 to characterize turn-on/turn-off delays. The board's low-parasitic routing and 50 Ω termination option at E4 allow accurate sub-microsecond timing measurements - a capability confirmed in the official DC391A Quick Start Guide.

What power supply requirements does the DC391A-A have?

The DC391A-A requires a single DC supply between 2.7 V and 6 V, connected across terminals E1 (+) and E3 (GND). This matches the operating range of the LTC5505 ICs it hosts. No additional regulators or bias networks are needed - the DC391A-A routes power directly to the IC's V_CC pin. Supply current draw is under 1.5 mA in active mode, as specified for the LTC5505 family.