Analog Devices Inc. DC1265A-A

Overview

DC1265A-A from Analog Devices (formerly Linear Technology) is a demonstration board for the LTC3220 360mA universal 18-channel LED driver IC, featuring twelve white and two RGB LEDs. It implements a low-noise charge pump with auto-switching 1x/1.5x/2x modes, I²C-controlled dimming across 64 steps, and software shutdown - used to validate LED backlighting and status-indication designs in portable displays and UI panels.

For engineers reviewing the DC1265A-A datasheet, DC1265A-A pinout, DC1265A-A application, or DC1265A-A equivalent, key selection considerations include its support for I²C-based gradation, blink, and GPO mode configuration; compatibility with QuikEval™ software via DC590 interface; and validation of LTC3220-specific charge pump behavior under real-world LED load dropout conditions.

Technical Context

Demonstration circuit DC1265A-A is designed exclusively for evaluating the LTC3220 - a 18-channel universal LED driver with integrated charge pump, internal 20mA full-scale current reference, and I²C register map supporting per-channel intensity, blink timing, gradation ramp, and GPO mode control. It operates from 2.9V to 5.5V input and supports DVCC from 1.5V to 5.5V.

The board implements all 18 ULED outputs (U1–U18), includes on-board decoupling (4.7µF VIN–GND), and interfaces via 14-conductor ribbon cable to the DC590 USB controller. Charge pump mode switching (1x → 1.5x → 2x) is triggered by LED dropout detection and reset on I²C register update - behavior directly observable during evaluation.

Key Specifications

Availability

DC1265A-A is available at Aetrix Electronics and suitable for LED driver evaluation, display backlight prototyping, and embedded UI indicator validation requiring stable component supply, traceable sourcing, and long-term design-in support.

Supply support for DC1265A-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, Inc. (acquired Linear Technology in 2017) is a global semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies.

DC1265A-A belongs to Linear's Demonstration Circuit (DC) series - purpose-built evaluation platforms that provide turnkey hardware, firmware, and QuikEval™ software integration to accelerate validation of Linear/Analog Devices power management ICs.

FAQ

What is the primary function of the DC1265A-A demonstration board?

The DC1265A-A demonstration board is a fully assembled and tested platform for evaluating the LTC3220 18-channel universal LED driver IC. It enables engineers to verify I²C-controlled LED dimming, gradation, blinking, charge pump mode switching, and GPO functionality without designing custom hardware. DC1265A-A includes all necessary passive components, LEDs, and interface connectors for immediate use with the DC590 controller and QuikEval™ software.

Which IC is mounted on the DC1265A-A board?

The DC1265A-A board is populated exclusively with the LTC3220 IC, as explicitly stated in the ordering row ("boards with either the LTC3220 (DC1265A-A) or the LTC3220-1 (DC1265A-B)") and confirmed throughout the Quick Start Guide and performance summary. No other LED driver IC is present or supported on this variant.

How does the DC1265A-A board interface with a host system?

The DC1265A-A interfaces via a 14-conductor ribbon cable to the DC590 USB Serial Controller board, which connects to a PC via USB. Communication uses standard I²C protocol over dedicated SDA/SCL lines, with DVCC level selectable (2.7V/3.3V/5V) on the DC590. The DC1265A-A itself has no onboard microcontroller - all control is relayed through the DC590 and QuikEval™ software.

Can the DC1265A-A drive external LEDs beyond the on-board ones?

Yes - the DC1265A-A provides test points and solder pads for all 18 ULED outputs (U1–U18), GND, CPO, VIN, and DVCC, enabling connection to external LED strings. The board's charge pump and current sources are fully functional off-board; however, external layout must maintain low-impedance paths and proper decoupling to preserve stability and noise performance observed with on-board LEDs.

Does the DC1265A-A support both LTC3220 and LTC3220-1 devices?

No - the DC1265A-A is configured specifically for the LTC3220, as indicated by its part number suffix "-A" and the explicit statement "boards with either the LTC3220 (DC1265A-A) or the LTC3220-1 (DC1265A-B)". The QuikEval™ software includes an LTC3220/LTC3220-1 select button to match the correct I²C address, but DC1265A-A hardware only accommodates the LTC3220.