Analog Devices Inc. DC2507A

Overview

DC2507A from Analog Devices is a 10-channel, high-accuracy digital temperature measurement evaluation board for the LTC2986/LTC2986-1 IC. It enables direct digitization of thermocouples (Types B, E, J, K, N, R, S, T), 2-/3-/4-wire RTDs, thermistors, and diodes with 0.1°C accuracy, 24-bit ΔΣ ADC resolution, and integrated cold junction compensation. Designed for lab validation and system integration in industrial process control, HVAC monitoring, and test equipment.

For engineers reviewing the DC2507A datasheet, DC2507A pinout, DC2507A application, or DC2507A equivalent, this page delivers verified hardware configuration details, SPI interface timing, sensor channel mapping, on-board EEPROM usage (LTC2986-1), and thermal measurement validation methodology - all specific to the DC2507A evaluation platform.

Technical Context

The DC2507A implements the LTC2986-1 IC in a fully assembled, tested LQFP-48 layout with calibrated reference circuitry, buffered analog inputs, and configurable jumpers for sensor type selection (thermocouple/RTD/thermistor/diode). It supports both single-ended and ratiometric measurement modes across all 10 CHx inputs and COM, with dedicated VREFOUT/VREFP routing and LDO-regulated 2.5V supply for precision.

Hardware-level features include on-board 1µF VREFOUT bypass, 10µF LDO output decoupling, Q1/Q2/Q3 charge pump capacitor pads, and SPI interface termination resistors. The board integrates fault detection circuitry (burn-out, short-circuit) and supports simultaneous 50Hz/60Hz rejection via programmable global configuration registers accessible through the LTC2986's command set.

Key Specifications

Availability

DC2507A is available at Aetrix Electronics and suitable for industrial process control, HVAC sensor validation, and test & measurement equipment requiring stable component supply and traceable evaluation hardware.

Supply support for DC2507A 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 industrial, automotive, communications, and healthcare markets.

The DC2507A belongs to ADI's precision temperature sensing evaluation platform family, engineered to accelerate design-in of the LTC2986/LTC2986-1 for multi-sensor thermal monitoring applications demanding metrology-grade accuracy and software configurability.

FAQ

What is the primary function of the DC2507A evaluation board?

The DC2507A evaluation board is a fully assembled hardware platform designed to demonstrate and validate the LTC2986-1 temperature measurement IC. It provides immediate access to all 10 analog input channels, SPI interface, EEPROM configuration storage, and reference circuitry - enabling rapid prototyping of thermocouple, RTD, thermistor, and diode-based thermal sensing systems without custom PCB development. DC2507A simplifies firmware integration and system-level accuracy verification.

Does DC2507A support both LTC2986 and LTC2986-1 IC variants?

No - DC2507A is specifically configured for the LTC2986-1 variant, which includes on-chip EEPROM for persistent storage of channel configurations, custom coefficients, and calibration data. The board's default firmware and hardware layout assume EEPROM presence; using a standard LTC2986 (non-EEPROM) requires manual register initialization on every power-up and is not supported out-of-box by DC2507A's default operation.

How does DC2507A handle cold junction compensation for thermocouples?

DC2507A leverages the LTC2986-1's integrated cold junction compensation engine, supporting multiple sensor types at the COM node - including diodes, RTDs, thermistors, or active analog sensors - to measure the PCB junction temperature. The board provides dedicated jumper-selectable connections for common cold junction sensors and routes COM directly to the LTC2986-1's differential input, enabling automatic polynomial-based correction without external computation. DC2507A validates this function per ANSI MC96.1 and IEC 60584 standards.

Can DC2507A measure negative thermocouple voltages below ground?

Yes - DC2507A supports measurement of thermocouple voltages down to –50 mV relative to GND, enabled by the LTC2986-1's extended input common-mode range (–0.05 V to VDD – 0.3 V) and internal charge pump (Q1/Q2/Q3 pins). This capability allows accurate reading of Type B, R, and S thermocouples at low temperatures where output polarity reverses, and is validated on DC2507A with on-board protection diodes and rail-to-rail input buffering.

What software tools are required to operate DC2507A?

DC2507A is supported by Analog Devices' LTspice-compatible evaluation software and the Linduino code library, providing GUI-based register configuration, real-time temperature streaming, EEPROM programming, and sensor-specific calibration wizards. Firmware updates and custom coefficient loading require the DC2507A's USB-to-SPI adapter (included) and are executed via the LTC2986-1's documented SPI command set - no proprietary drivers or OS-specific tools are needed. DC2507A documentation includes complete register map cross-references.