Analog Devices Inc. DC1571A-C

Overview

DC1571A-C from Analog Devices (formerly Linear Technology) is a fully assembled, RoHS-compliant demonstration board for the LTC2381-16 16-bit, 250ksps SAR ADC. It implements a complete signal chain with LT6350 single-ended-to-differential driver, LTC6652-2.5 precision reference, and optimized passive filtering - enabling immediate evaluation of ±2.5V differential input performance, 92dB SNR, and daisy-chain SPI operation at full throughput. Designed for lab validation of high-speed data acquisition systems.

For engineers reviewing the DC1571A-C datasheet, DC1571A-C pinout, DC1571A-C application, or DC1571A-C equivalent, this board provides verified layout, calibrated timing margins, production-grade decoupling (47µF X5R REF bypass, 10µF VDD, 0.1µF OVDD), and direct access to all LTC2381-16 signals including CNV, BUSY, SDO/SCK/RDL/SDI, CHAIN, and dual REF pins - supporting rapid integration into medical imaging, ATE, and portable instrumentation prototypes.

Technical Context

The DC1571A-C implements the LTC2381-16 in its 16-lead DFN (4mm × 3mm) package with exposed pad grounded, paired with the LT6350 configured for 0V–2.5V single-ended to ±2.5V differential conversion. It uses the LTC6652-2.5 reference (0.05% initial accuracy, 5ppm/°C drift) and includes discrete RC filters (LPF1 = 48kHz, LPF2 = 482kHz) matching Figure 4 of the LTC2381-16 datasheet.

Board-level design enforces critical layout practices: separate analog/digital ground planes tied at single point under REF, low-inductance 47µF ceramic capacitor directly at REF pins, 0.1µF OVDD bypass adjacent to pin 15, and matched-length SCK/SDO/RDL traces to support 100MHz SPI clocking. All power supplies (VDD = 2.5V, OVDD = 1.8/2.5/3.3/5V selectable) are independently regulated and filtered.

Key Specifications

Availability

DC1571A-C is available at Aetrix Electronics and suitable for medical imaging front-ends, automated test equipment (ATE) digitizers, and portable instrumentation requiring stable component supply, validated reference designs, and production-ready signal chain implementation.

Supply support for DC1571A-C 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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.

The DC1571A-C belongs to Analog Devices' DC1571 demonstration platform family, engineered specifically to accelerate evaluation and prototyping of high-speed, low-power SAR ADCs in demanding applications such as precision data acquisition and real-time signal analysis.

FAQ

What is the primary function of the DC1571A-C demonstration board?

The DC1571A-C is a ready-to-use evaluation platform for the LTC2381-16 16-bit, 250ksps SAR ADC. It integrates the LTC2381-16, LT6350 driver, LTC6652-2.5 reference, and optimized filtering to enable immediate measurement of dynamic performance (92dB SNR, ±2LSB INL) and SPI interface functionality - eliminating the need for custom PCB development during early system validation.

Does the DC1571A-C support daisy-chain configuration for multiple LTC2381-16 devices?

Yes, the DC1571A-C supports daisy-chain operation via the CHAIN pin (Jumper JP1). When JP1 is installed, the RDL/SDI pin functions as serial data input, allowing up to four DC1571A-C boards (or other LTC2381-16-based systems) to be cascaded on a single SPI bus - preserving timing integrity and reducing host GPIO count while maintaining full 250ksps throughput per device.

What input signal types does the DC1571A-C accept, and how is it conditioned?

The DC1571A-C accepts 0V–2.5V single-ended input signals. The LT6350 on the board performs single-ended-to-differential conversion to produce the ±2.5V differential signal required by the LTC2381-16. This configuration matches Figure 5 in the LTC2381-16 datasheet and achieves full 92dB SNR and –106dB THD without external gain stages or level shifting.

Can the DC1571A-C operate across the full –40°C to 125°C temperature range specified for the LTC2381HMS-16 and LTC6652HMS-2.5?

No. While the DC1571A-C incorporates H-grade components (LTC2381HMS-16, LTC6652HMS-2.5), its PCB assembly and passive components are rated for 0°C to 70°C operation. For extended temperature validation, users must perform thermal characterization of the full board assembly - the underlying ICs support 125°C junction operation, but board-level reliability beyond 70°C requires customer qualification.

How is power sequencing managed on the DC1571A-C to ensure reliable LTC2381-16 startup?

The DC1571A-C uses independent regulators for VDD (2.5V), OVDD (1.8V/2.5V/3.3V/5V), and REF (2.5V), each with dedicated decoupling. No strict power-up sequence is required: the LTC2381-16 powers up correctly as long as VDD reaches 2.375V before CNV activation, and OVDD is stable prior to SPI communication. The board includes LED indicators for each rail to verify proper sequencing during lab use.