Analog Devices Inc. DC1826A-A

Overview

DC1826A-A from Analog Devices (formerly Linear Technology) is a demonstration board for the LT6200-10 single-channel, rail-to-rail input/output, low-noise operational amplifier. It supports 1.6GHz gain bandwidth at AV ≥ 10, 0.95nV/√Hz input voltage noise at 100kHz, and operates from 2.5V to 12.6V supplies. The board enables rapid evaluation of high-speed photodiode transimpedance amplifiers and precision signal conditioning in low-voltage systems.

For engineers reviewing the DC1826A-A datasheet, DC1826A-A pinout, DC1826A-A application, or DC1826A-A equivalent, this board provides verified layout, thermal management, and noise-optimized routing for the LT6200-10 in TSOT-23 and SO-8 packages - critical for transimpedance amplifier stability, ADC driver settling, and low-distortion active filter design.

Technical Context

The DC1826A-A implements a single-supply, 1.5nV/√Hz photodiode amplifier reference design using the LT6200-10 op amp configured with 10kΩ feedback and 0.1µF compensation. Its layout isolates analog ground, minimizes parasitic capacitance at the inverting input, and uses matched trace lengths to preserve phase margin above 70° across –40°C to 85°C.

It supports both TSOT-23-6 and SO-8 footprints for the LT6200-10, includes test points for V_IN+, V_IN–, V_OUT, and SHDN, and integrates a PHILIPS BF862 JFET for ultra-low-input-bias-current front-end staging - enabling sub-100fA bias current operation in high-impedance sensor interfaces.

Key Specifications

Availability

DC1826A-A is available at Aetrix Electronics and suitable for photodiode signal conditioning, high-speed ADC driving, and low-noise active filtering requiring stable component supply, full documentation, and manufacturer-validated performance data.

Supply support for DC1826A-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. (ADI) is a global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies.

The DC1826A-A belongs to ADI's Linear Technology demonstration board portfolio, designed to accelerate validation of precision, high-speed op amps in sensor interface, medical instrumentation, and test equipment applications.

FAQ

What is the primary function of the DC1826A-A evaluation board?

The DC1826A-A evaluation board is a fully assembled and tested demonstration platform for the LT6200-10 operational amplifier. It implements a photodiode transimpedance amplifier circuit with 10kΩ feedback and 0.1µF compensation, enabling immediate characterization of the DC1826A-A's 1.6GHz gain bandwidth, 0.95nV/√Hz noise, and rail-to-rail output swing under real-world loading conditions.

Which package variants of the LT6200-10 does the DC1826A-A support?

The DC1826A-A supports both the 6-lead TSOT-23 (e.g., LT6200IS6-10) and 8-lead SO (e.g., LT6200IS8-10) packages of the LT6200-10. The board includes dual footprints with identical signal routing, allowing direct comparison of thermal performance, layout sensitivity, and high-frequency stability between the two封装 options without redesign.

Does the DC1826A-A include shutdown functionality verification?

Yes, the DC1826A-A provides full access to the SHDN pin of the LT6200-10 via test point and jumper. When driven low (≤0.3V), the DC1826A-A reduces supply current from 22mA to ≤1.9mA while maintaining <75µA output leakage - enabling validation of fast turn-on (180ns) and turn-off (180ns) timing critical for power-gated sensor front-ends.

Can the DC1826A-A be used with single-supply or dual-supply configurations?

The DC1826A-A is optimized for single-supply operation (e.g., 5V), matching the LT6200-10's rail-to-rail input common-mode range (V– to V+) and output swing (within 170mV of rails at 20mA). While dual-supply use is possible, the board's ground-referenced photodiode input topology and lack of split-supply decoupling make it primarily intended for single-rail systems.

How does the DC1826A-A address input bias current limitations in photodiode applications?

The DC1826A-A integrates a PHILIPS BF862 JFET at the input stage to reduce effective input bias current below 100fA - far lower than the LT6200-10's native ±10µA max. This hybrid front-end preserves the DC1826A-A's ability to resolve weak photocurrents without compromising the op amp's 1.6GHz bandwidth or 0.95nV/√Hz noise floor.