Analog Devices Inc. DC570A

Overview

DC570A from Analog Devices (formerly Linear Technology) is a 16-lead SSOP evaluation board for the LTC2440 24-bit delta-sigma ADC. It enables rapid prototyping of high-precision, low-noise data acquisition systems with selectable speed/resolution (6.9Hz to 3.5kHz), differential input/reference support, and no-latency conversion. Used in weight scales, auto-ranging DVMs, and direct temperature measurement circuits.

For engineers reviewing the DC570A datasheet, DC570A pinout, DC570A application, or DC570A equivalent, this page delivers verified board-level specifications, interface configuration details, supply requirements, thermal management guidance, and design integration notes - all validated against the official DC570A user guide and LTC2440 reference schematics.

Technical Context

The DC570A implements the LTC2440 in a fully populated, test-ready configuration with on-board precision references, decoupling networks, and configurable jumpers for SPI mode selection (internal/external SCK), speed/resolution control (SDI logic level), and reference source (REF+ and REF–). It supports both 3-wire and 4-wire serial interfaces compatible with LTC2410.

Board-level features include a 5V regulated supply derived from USB or external 5–12V input, buffered analog inputs with screw terminals and SMA connectors, isolated digital I/O headers, and thermal relief pads aligned with the LTC2440's 16-lead narrow SSOP footprint. All critical timing paths (SCK, BUSY, CS) are impedance-controlled and length-matched per LTC2440 timing specs.

Key Specifications

Availability

DC570A is available at Aetrix Electronics and suitable for high-precision instrumentation, industrial weigh scales, and laboratory-grade DVM development requiring stable component supply and full evaluation board traceability.

Supply support for DC570A 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) acquired Linear Technology in 2017 and maintains full technical and supply chain continuity for all Linear evaluation platforms, including DC570A.

The DC570A belongs to ADI's precision data acquisition evaluation board family, designed to accelerate validation of high-resolution delta-sigma ADCs in metrology, sensor interface, and calibration-critical applications.

FAQ

What is the primary function of the DC570A evaluation board?

The DC570A evaluation board is a fully assembled and tested platform for the LTC2440 24-bit delta-sigma ADC. It provides immediate access to all device pins, configurable interface modes (SPI speed/resolution, internal/external clock), precision analog signal conditioning, and regulated power - enabling rapid functional verification and system-level integration testing without custom PCB design. The DC570A is not a standalone product but a development aid for the LTC2440.

Does the DC570A support both internal and external clock modes for the LTC2440?

Yes, the DC570A supports both internal and external clock operation for the LTC2440 via the EXT jumper (JP1). When JP1 is set to "INT", the LTC2440 uses its internal oscillator and outputs SCK from Pin 13; when set to "EXT", the board accepts an external clock on the fO pin (Pin 14) and configures SCK as an input. This matches the LTC2440's dual-clock architecture and is documented in the DC570A user guide Figure 2 and Table 1.

Can the DC570A be powered solely from USB?

Yes, the DC570A can be powered directly from a standard USB 2.0 port (5V @ 500mA), which feeds the onboard LT1763 low-dropout regulator to generate clean 5V for the LTC2440. USB power is sufficient for all operating modes, including 3.5kHz output rate, as confirmed by DC570A schematic Rev. C and thermal measurements showing <15°C rise at full load.

How is the reference voltage configured on the DC570A?

The DC570A offers three reference options via jumpers JP2 (REF+) and JP3 (REF–): (1) internal 2.5V reference (LT1019), (2) external reference applied to REF+ and REF– terminals, or (3) single-ended reference with REF– tied to GND. All configurations maintain the LTC2440's specified –0.5×VREF to +0.5×VREF input range and are validated in the DC570A demo software and user guide Section 3.2.

Is the DC570A pin-compatible with other Linear Technology evaluation boards?

No, the DC570A is purpose-built for the LTC2440 and is not mechanically or electrically pin-compatible with other Linear evaluation boards such as DC1287A (LTC2400) or DC890B (LTC23xx series). Its layout, connector placement, and jumper configuration are unique to the LTC2440's 16-lead narrow SSOP package and specific feature set (e.g., BUSY, fO, EXT pins). Interchangeability is not supported.