Analog Devices Inc. DC1370A-C

Overview

DC1370A-C from Analog Devices (formerly Linear Technology) is a 40-lead QFN evaluation board for the LTC2261-14, a 14-bit, 125Msps ultralow-power ADC with 73.4dB SNR, 85dB SFDR, and 0.17psRMS jitter. It supports CMOS, DDR CMOS, and DDR LVDS outputs, operates from a single 1.8V supply, and targets high-frequency digitization in communications and portable medical imaging systems.

For engineers reviewing the DC1370A-C datasheet, DC1370A-C pinout, DC1370A-C application, or DC1370A-C equivalent, this page provides verified board-level specifications, supported ADC configuration modes, analog input interface details, clocking options including duty cycle stabilization, and SPI-based register control - all essential for rapid prototyping of wideband data acquisition systems.

Technical Context

The DC1370A-C implements the full signal chain for the LTC2261-14: differential analog input path with selectable 1–2VP-P range, on-board 1.8V LDOs for VDD and OVDD, configurable ENC+ / ENC– clock inputs accepting sine, PECL, LVDS, TTL, or CMOS, and dual-mode digital output routing (CMOS/LVDS) with termination and voltage-level flexibility. It includes onboard reference decoupling (REFH/REFL), VCM bias generation, and SENSE pin support for internal/external reference selection.

Board-level features include a 40-pin UJ-package socket for the LTC2261-14, jumper-selectable programming mode (serial PAR/SER or parallel), dedicated test points for all critical signals (AIN+, AIN–, CLKOUT+, CLKOUT–, D0–D13, OF), and provisioned footprints for external clock sources, analog input transformers, and output termination networks - enabling direct validation of AC performance up to 140MHz input frequency.

Key Specifications

Availability

DC1370A-C is available at Aetrix Electronics and suitable for cellular base station development, software-defined radio (SDR) prototyping, and portable medical ultrasound imaging requiring stable component supply and validated high-speed ADC evaluation infrastructure.

Supply support for DC1370A-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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving precision instrumentation, communications, industrial, and healthcare markets.

The DC1370A-C belongs to ADI's Linear Technology evaluation board family, designed specifically to accelerate time-to-prototype for high-speed data converters - providing complete, production-ready reference designs with documented layout, power integrity, and signal integrity practices.

FAQ

What is the primary function of the DC1370A-C evaluation board?

The DC1370A-C evaluation board is a fully assembled and tested platform for evaluating the LTC2261-14 14-bit, 125Msps analog-to-digital converter. It enables engineers to validate dynamic performance (SNR, SFDR), configure digital output modes (CMOS/LVDS), test SPI register control, and integrate the ADC into wideband signal chains without custom PCB design. The DC1370A-C includes all necessary power regulation, clock conditioning, and signal routing to achieve datasheet-grade results.

Which ADC variants does the DC1370A-C support besides the LTC2261-14?

The DC1370A-C is pin-compatible with the LTC2260-14 (105Msps) and LTC2259-14 (80Msps) due to identical 40-lead QFN packaging and shared register map. All three devices share the same analog front-end architecture, reference scheme, and digital interface - allowing the same DC1370A-C board to be used for performance comparison across sampling rates while maintaining consistent layout and measurement conditions.

How does the DC1370A-C handle clock input and jitter sensitivity?

The DC1370A-C accepts differential (ENC+/ENC–) or single-ended clock inputs with support for sine wave, PECL, LVDS, TTL, and CMOS logic levels. It incorporates a clock duty cycle stabilizer (enabled via CS pin) to maintain optimal timing margins at full speed, directly addressing the LTC2261-14's 0.17psRMS aperture jitter specification. Test points for CLKOUT+/CLKOUT– allow loopback verification and phase alignment checks critical for undersampling applications.

Can the DC1370A-C be used with external reference sources?

Yes - the DC1370A-C supports both internal and external reference configurations. When the SENSE pin is grounded, the LTC2261-14 uses its internal 1.25V reference for ±0.5V input range; when tied to VDD, it selects ±1V range. For external references, the board provides access to the SENSE pin and REFH/REFL pins, allowing connection of precision external voltage references between 0.625V and 1.3V - enabling calibrated measurements in metrology-grade applications using the DC1370A-C.

What are the key layout features of the DC1370A-C that ensure high-fidelity ADC evaluation?

The DC1370A-C employs split ground planes (analog GND and output OGND), controlled-impedance routing for high-speed digital outputs, optimized analog input path symmetry with matched trace lengths for AIN+/AIN–, and comprehensive decoupling (0.1µF ceramics at every VDD/OVDD pin plus bulk 2.2µF at REFH/REFL). These features minimize noise coupling and preserve the LTC2261-14's 73.4dB SNR and 85dB SFDR - making the DC1370A-C a trusted reference for production-level ADC integration decisions.