Analog Devices Inc. DC1762A-F

Overview

DC1762A-F from Analog Devices (formerly Linear Technology) is a fully assembled, tested evaluation board for the LTC2162 16-bit, 65Msps low-power analog-to-digital converter. It features differential analog input, selectable CMOS/LVDS DDR outputs, 77dB SNR at 70MHz input, 90dB SFDR, and ultralow 0.07psRMS jitter - enabling high-fidelity undersampling of IF signals in software-defined radios and cellular base stations.

For engineers reviewing the DC1762A-F datasheet, DC1762A-F pinout, DC1762A-F application, or DC1762A-F equivalent, this board provides immediate hardware validation of the LTC2162's dynamic performance, clock interface flexibility (differential/single-ended ENC), output mode configuration (CMOS/LVDS/DDR), and SPI-based register control - critical for RF receiver front-end and multichannel acquisition system design.

Technical Context

The DC1762A-F implements the LTC2162 ADC in its native 48-lead 7mm × 7mm QFN package with full signal integrity support: matched-length differential analog input traces, on-board 1.8V LDOs for VDD/OVDD, dedicated ground planes for analog/digital/output domains, and configurable termination for LVDS outputs. It integrates a precision clock conditioning path with optional duty cycle stabilizer and supports both serial (SPI) and parallel programming modes via the PAR/SER pin.

Board-level features include SMA-connected analog input and clock inputs, test points for all critical signals (AIN+, AIN–, ENC+, ENC–, D0–D15, CLKOUT±, OF), jumper-selectable output supply (1.2V/1.5V/1.8V), and onboard reference decoupling (REFH/REFL/VREF). The layout adheres to high-speed ADC layout best practices - including exposed pad grounding, local 0.1µF ceramic bypassing at each power pin, and isolation between sensitive analog and digital routing.

Key Specifications

Availability

DC1762A-F is available at Aetrix Electronics and suitable for RF receiver development, high-speed data acquisition systems, and communications infrastructure prototyping requiring stable component supply and rapid time-to-test.

Supply support for DC1762A-F 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 technologies for precision measurement and high-speed conversion applications.

The DC1762A-F belongs to Analog Devices' LTC evaluation board family, designed specifically to accelerate adoption of their high-speed ADCs by providing production-ready layouts, verified signal integrity, and complete documentation - targeting RF, medical imaging, and test equipment developers.

FAQ

What is the primary function of the DC1762A-F evaluation board?

The DC1762A-F evaluation board is a ready-to-use hardware platform for evaluating the LTC2162 16-bit, 65Msps analog-to-digital converter. It enables engineers to validate dynamic performance (SNR, SFDR), configure output interfaces (CMOS/LVDS DDR), test clocking options (differential/single-ended ENC), and verify SPI register control - all without custom PCB design. DC1762A-F reduces development risk by providing a reference layout that matches production requirements.

Does the DC1762A-F support both internal and external voltage references?

Yes, the DC1762A-F supports both internal and external reference configurations for the LTC2162. It uses the device's internal 1.25V reference by default, but also provides access to the SENSE pin (Pin 46) and associated circuitry to connect an external reference - allowing users to evaluate noise, drift, and accuracy trade-offs between reference sources. This dual-mode capability is documented in the LTC2162 datasheet and implemented on DC1762A-F per Linear Technology Application Note AN124.

Can the DC1762A-F be used to evaluate the LTC2161 or LTC2160 variants?

No, the DC1762A-F is specifically designed and optimized for the LTC2162 (65Msps) variant. While the LTC2161 (40Msps) and LTC2160 (25Msps) share the same pinout and core architecture, the DC1762A-F's layout, clock distribution, and power delivery are tuned for 65Msps operation - including trace length matching, decoupling, and thermal management. Using it with lower-speed variants is possible but does not leverage the board's full validation scope or guarantee optimal performance.

What output interface modes are accessible on the DC1762A-F?

The DC1762A-F supports all three digital output modes of the LTC2162: full-rate CMOS, double-data-rate (DDR) CMOS, and DDR LVDS. Mode selection is achieved via on-board jumpers (for basic configuration) and SPI register writes (for runtime reconfiguration). LVDS outputs include 100Ω on-chip termination and differential SMA connectors for CLKOUT± and OF±, while CMOS outputs are routed to headers with configurable OVDD (1.2V/1.5V/1.8V).

Is the DC1762A-F compatible with standard FPGA or ASIC digital capture interfaces?

Yes, the DC1762A-F provides direct connectivity to FPGA or ASIC digital capture systems. Its 16-bit parallel data outputs (D0–D15) and frame/overflow signals (OF) are routed to 0.1" headers with proper voltage-level alignment (1.2V/1.5V/1.8V CMOS or LVDS-compatible swing). Timing parameters - including ENC-to-data delay (1.1–3.2ns), pipeline latency (6–6.5 cycles), and skew control - match LTC2162 specifications, enabling reliable synchronization with Xilinx or Intel FPGA I/O banks configured for source-synchronous capture.