Analog Devices Inc. DC1996A-C

Overview

DC1996A-C from Analog Devices is an evaluation board for the LTC2323-14 - a dual, 14-bit + sign, 5 Msps differential SAR ADC with integrated 2.048 V / 4.096 V temperature-compensated reference, 80 dB SNR, ±1 LSB INL (typ), and LVDS/CMOS serial interface in a 28-lead 4 mm × 5 mm QFN package. It supports high-speed data acquisition in demanding industrial and communications systems.

For engineers reviewing the DC1996A-C datasheet, DC1996A-C pinout, DC1996A-C application, or DC1996A-C equivalent, key selection considerations include its direct support for the LTC2323-14's dual-channel 5 Msps operation, on-board LVDS/CMOS interface configuration, precision reference decoupling, and FPGA-compatible timing alignment via CLKOUT skew-matching.

Technical Context

The DC1996A-C implements a complete signal chain for the LTC2323-14, including matched 100 Ω differential LVDS termination for SDO/CLKOUT/SCK, independent 1.8 V–2.5 V OVDD regulation, dual 10 µF + 0.1 µF REFOUT decoupling per channel, and configurable CNV edge-triggering with low-jitter clock routing. It provides access to all 28 pins of the UFD package via solderable test points and 0.1" headers.

Designed for validation of high-fidelity analog capture at full 5 Msps throughput, the board incorporates ground plane partitioning between analog (AIN1±/AIN2±), reference (REFOUT1/2, VBYP1/2), and digital (SCK, SDO, CLKOUT) domains, with exposed pad thermal anchoring and controlled-impedance traces for LVDS pairs (≤100 Ω ±10%).

Key Specifications

Availability

DC1996A-C is available at Aetrix Electronics and suitable for high-speed data acquisition systems, optical networking front-ends, and multiphase motor control designs requiring stable component supply and rapid prototyping validation.

Supply support for DC1996A-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. is a global semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and high-speed conversion applications.

The DC1996A-C belongs to Analog Devices' Linear Technology evaluation board product line, engineered to accelerate design-in and performance verification of high-speed, low-noise ADCs like the LTC2323-14 in real-world signal chains.

FAQ

What is the primary function of the DC1996A-C evaluation board?

The DC1996A-C evaluation board is a fully assembled and tested platform designed specifically to evaluate the LTC2323-14 dual 14-bit + sign, 5 Msps SAR ADC. It provides immediate access to all critical signals-including differential analog inputs (AIN1±/AIN2±), LVDS/CMOS serial interface (SCK, SDO1/2, CLKOUT), internal reference outputs (REFOUT1/2), and power domains-enabling rapid characterization of dynamic performance (e.g., 80 dB SNR, ±1 LSB INL) and timing compliance per the LTC2323-14 datasheet. DC1996A-C includes onboard decoupling, impedance-matched routing, and FPGA-compatible connectors.

Does the DC1996A-C support both CMOS and LVDS interface modes for the LTC2323-14?

Yes, the DC1996A-C supports both CMOS and LVDS interface modes for the LTC2323-14. A dedicated jumper selects the CMOS/LVDS pin (Pin 25) state: grounded for CMOS, tied to OVDD for standard LVDS, or left floating for low-power LVDS. The board includes 100 Ω differential terminations for SDO1±, SDO2±, CLKOUT±, and SCK±, plus proper OVDD regulation (1.8 V or 2.5 V) and layout isolation to maintain signal integrity at full 5 Msps throughput. DC1996A-C validates timing parameters such as tDCNVSDOV (2.5–3 ns) and tDCLKOUTSDOV (2 ns).

Can the DC1996A-C be used to evaluate external reference configurations with the LTC2323-14?

Yes, the DC1996A-C supports external reference evaluation with the LTC2323-14. When REFINT (Pin 28) is pulled to ground, the internal REFOUT1/2 buffers are disabled, allowing external references (1.25 V to VDD) to drive REFOUT1 (Pin 12) and REFOUT2 (Pin 26). The board provides test points and solder pads for injecting external references, maintains separate REFRTN1/2 return paths, and retains full decoupling capability (0.1 µF + 10 µF per REFOUT) to ensure stability. DC1996A-C enables comparison of SNR/SINAD performance using internal vs. external references per the LTC2323-14 specifications.

What analog input configurations does the DC1996A-C accommodate for the LTC2323-14?

The DC1996A-C accommodates fully differential, pseudo-differential bipolar, and pseudo-differential unipolar analog input configurations for the LTC2323-14 without hardware rework. Its AIN1± and AIN2± inputs feature 25 Ω series resistors and optional 220 pF AC coupling, supporting common-mode ranges from 0 V to VDD and differential spans up to ±4.096 V. Test points allow direct connection of single-ended sources (e.g., ground-referenced signals) to one input while driving the complementary input with a reference voltage - enabling validation of CMRR >85 dB and transient response <3 ns as specified for the LTC2323-14.

Is thermal management addressed on the DC1996A-C for sustained 5 Msps operation of the LTC2323-14?

Yes, thermal management is explicitly addressed on the DC1996A-C. The LTC2323-14 UFD package's exposed pad (Pin 29) is soldered directly to a large internal copper thermal plane connected to multiple thermal vias, ensuring low-impedance heat transfer to the PCB. The board layout separates analog, reference, and digital ground planes with strategic stitching, and includes dedicated VDD (3.3 V/5 V) and OVDD (1.8 V/2.5 V) power planes with low-ESR ceramic bypassing. This design sustains full 5 Msps operation with typical power dissipation of 76–105 mW (VDD = 5 V) while maintaining junction temperatures within the LTC2323-14's –40°C to 125°C operational range.