Analog Devices Inc. DC1082A-E

Overview

DC1082A-E from Analog Devices (formerly Linear Technology) is a demonstration board for the LTC2356-14 14-bit, 3.5 Msps serial ADC with differential inputs, 3.3V single-supply operation, and 80 dB common-mode rejection. It enables evaluation of high-speed, low-power data acquisition in portable instrumentation and multiphase motor control systems.

For engineers reviewing the DC1082A-E datasheet, DC1082A-E pinout, DC1082A-E application, or DC1082A-E equivalent, this board provides validated signal integrity, reference bypassing, and SPI-compatible timing for rapid prototyping of precision analog front-ends requiring ≤39 ns acquisition time and ±1.25 V bipolar input range.

Technical Context

The DC1082A-E implements the LTC2356-14 in its native 10-lead MSOP package with exposed-pad grounding, supporting full 3.5 Msps sampling via precise CONV/SCK timing alignment and 16-cycle serial output framing. It integrates 10 µF ceramic + 0.1 µF ceramic bypassing on both VDD and VREF pins per datasheet recommendations.

Board-level design enforces strict analog-digital separation: dedicated ground plane routing, matched-length AIN+/AIN– traces, and isolated digital output paths to preserve 74.1 dB SINAD at 1.4 MHz input frequency and maintain 0.5 LSB DNL across temperature.

Key Specifications

Availability

DC1082A-E is available at Aetrix Electronics and suitable for high-speed data acquisition systems, portable test equipment, and multiphase motor control applications requiring stable component supply and validated evaluation platform performance.

Supply support for DC1082A-E 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 leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, and communications markets.

The DC1082A-E belongs to ADI's Linear Technology legacy evaluation board family, designed specifically to accelerate development of high-fidelity, low-power data acquisition systems using SAR ADCs with stringent dynamic accuracy requirements.

FAQ

What is the primary function of the DC1082A-E evaluation board?

The DC1082A-E evaluation board is a fully assembled and tested hardware platform for evaluating the LTC2356-14 14-bit, 3.5 Msps differential SAR ADC. It provides all necessary power regulation, reference bypassing, analog input conditioning, and SPI interface signals to validate timing, noise, and linearity performance without custom PCB design. DC1082A-E enables immediate bench testing of the LTC2356-14 under real-world conditions including 39 ns acquisition time and 80 dB CMRR.

Does the DC1082A-E support both LTC2356-12 and LTC2356-14 devices?

Yes, the DC1082A-E is compatible with both the LTC2356-12 and LTC2356-14, as confirmed by Analog Devices' official documentation and board silkscreen labeling. The board's circuitry-including reference decoupling, clock timing margins, and analog input drive capability-is optimized for the shared 10-lead MSOP package and identical pinout of both variants. DC1082A-E allows direct substitution and comparative evaluation of resolution-dependent performance metrics such as SINAD (71.1 dB for LTC2356-12 vs. 74.1 dB for LTC2356-14).

How does the DC1082A-E handle power supply and reference stability?

The DC1082A-E implements dual-stage bypassing per the LTC2356-14 datasheet: 10 µF ceramic (or 10 µF tantalum + 0.1 µF ceramic) on both VDD and VREF pins, placed adjacent to the IC. It uses a low-noise 3.3V supply path with dedicated ground return routing to minimize PSRR degradation. VREF settling time after Sleep-to-Wake transition is validated at 2 ms with 10 µF load, matching the LTC2356-14 specification. DC1082A-E also provides test points for monitoring VREF drift (<15 ppm/°C) and supply current (5.5 mA active, 4 µA Nap, 4 µA Sleep).

Can the DC1082A-E be used with external reference sources?

Yes, the DC1082A-E supports external reference overdrive on the VREF pin, as specified for the LTC2356-14. The board includes a jumper option to disconnect the internal reference and route an external source (2.55V to VDD) directly to Pin 3. This configuration maintains full 3.5 Msps operation and preserves differential input range scaling (±VREF/2), enabling system-level calibration and improved absolute accuracy. DC1082A-E's layout ensures minimal noise coupling when using external references, validated by THD < –82 dB at 1.4 MHz.

What software and PC interface options are supported with the DC1082A-E?

The DC1082A-E is supported by Analog Devices' Linduino firmware and DC1082A-E demo software, which run on Windows via USB-to-SPI adapter (e.g., DC590B). It enables real-time capture of conversion data, FFT analysis, histogram generation, and parameter sweeps (e.g., sampling rate, input frequency, reference voltage). All communication uses standard SPI protocol with CONV-triggered acquisition and 16-cycle SDO readout-fully compatible with the LTC2356-14 timing diagram. DC1082A-E requires no additional drivers beyond standard USB CDC class.