Analog Devices Inc. DC575A

Overview

DC575A from Analog Devices (acquired Linear Technology) is a demonstration board for the LTC2410 24-bit delta-sigma ADC, designed for high-precision differential analog-to-digital conversion in metrology and sensor interfaces. It delivers 2 ppm linearity, 2.5 ppm full-scale accuracy, 0.1 ppm offset, and 0.16 ppm noise, with fully differential inputs and reference, 140 dB input common-mode rejection, and SPI interface compatibility.

For engineers reviewing the DC575A datasheet, DC575A pinout, DC575A application, or DC575A equivalent, this board enables rapid evaluation of the LTC2410's performance-including 50/60 Hz notch filtering, external clock synchronization, high-side current sensing via milliohm shunts, and bipolar transfer function symmetry-using the DC590 USB Serial Controller and bundled software.

Technical Context

The DC575A implements the LTC2410 in a fixed hardware configuration optimized for low-noise, high-resolution measurements. It supports selectable 50 Hz or 60 Hz line-frequency rejection via JP4, external trigger mode via JP3 and JP5, and onboard LT1236 5.00 V reference (JP1/JP2 configurable for external REF+/REF−).

Hardware features include turret-based analog connections (IN+, IN−, REF+, REF−, GND, VCC), exposed ground planes for low-impedance prototyping, Fo turret for external conversion clock up to 2 MHz, and J2 14-pin ribbon interface to the DC590 controller for power and SPI communication.

Key Specifications

Availability

DC575A is available at Aetrix Electronics and suitable for precision metrology, industrial sensor calibration, and high-accuracy current monitoring applications requiring stable component supply and validated evaluation infrastructure.

Supply support for DC575A 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 for precision measurement and control systems.

The DC575A belongs to ADI's QuickEval™ demonstration board family, engineered specifically to accelerate validation and system-level integration of high-resolution delta-sigma ADCs like the LTC2410 in demanding measurement applications.

FAQ

What is the primary function of the DC575A demonstration board?

The DC575A demonstration board is a hardware platform designed exclusively to evaluate the LTC2410 24-bit delta-sigma ADC. It provides ready-to-use analog signal routing, configurable reference and trigger options, and SPI interface connectivity to the DC590 controller. The DC575A enables immediate characterization of key parameters including linearity, noise, common-mode rejection, and 50/60 Hz notch performance without custom PCB design.

How does the DC575A support high-side current sensing with milliohm shunts?

The DC575A supports high-side current sensing by allowing IN+ to be tied to VCC and IN− to be connected through a shunt resistor to ground-leveraging the LTC2410's rail-to-rail input common-mode range (GND to VCC). This configuration avoids ground-loop disruption while enabling sub-microvolt resolution. The DC575A's turret posts and exposed ground planes ensure low-impedance, low-noise connections critical for accurate milliohm-shunt voltage measurement using the DC575A.

Can an external clock be used with the DC575A, and what are the requirements?

Yes, an external conversion clock can be applied to the Fo turret on the DC575A to adjust data output rate or modify frequency rejection characteristics. JP4 must be removed first. The clock must be a square wave with logic-low = GND and logic-high = VCC, and maximum recommended frequency is 2 MHz. Performance degradation may occur above optimal rates; full timing compliance requires referencing the LTC2410 datasheet-not the DC575A guide alone-when using external clocks with the DC575A.

What software and host interface are required to operate the DC575A?

The DC575A requires the DC590 USB Serial Controller board and Analog Devices' evaluation software (downloadable from analog.com or included with DC590). The software automatically loads the correct configuration for the DC575A, supports real-time strip-chart and histogram displays, data logging, reference voltage adjustment, averaging depth control, and DVM-style readouts. No additional drivers or firmware installation is needed beyond standard USB CDC-class support for the DC590 when operating the DC575A.

Does the DC575A provide access to all LTC2410 pins, and how are signals routed?

The DC575A provides functional access to all critical LTC2410 signals-including IN+, IN−, REF+, REF−, GND, VCC, SDO, SCK, CS, and Fo-via turret posts, jumpers, and the J2 ribbon connector. Pin-level access is not provided in IC socket form; instead, signals are routed to standardized test points and headers optimized for probing and interconnection. The DC575A's layout preserves signal integrity for differential pairs and reference paths, with dedicated ground planes and minimal trace length-ensuring representative LTC2410 behavior during evaluation of the DC575A.