Analog Devices Inc. DC1532A-K

Overview

DC1532A-K from Analog Devices (formerly Linear Technology) is an evaluation board for the LTC2265-12, a 12-bit, 65 Msps dual-channel simultaneous-sampling analog-to-digital converter. It supports serial LVDS output (1- or 2-lane), 1.8 V single-supply operation, 71 dB SNR at 70 MHz input, and features ultralow 0.15 ps_RMS aperture jitter - enabling high-fidelity undersampling in IF-receiver applications such as software-defined radios and cellular base stations.

For engineers reviewing the DC1532A-K datasheet, DC1532A-K pinout, DC1532A-K application, or DC1532A-K equivalent, this page provides verified hardware configuration details, supported ADC operating modes (e.g., 2-lane LVDS, internal/external reference selection), power sequencing guidance, clock interface compatibility (LVDS/PECL/TTL), and FPGA interface timing constraints derived from LTC2265-12's documented DCO/FR/data serialization behavior.

Technical Context

The DC1532A-K implements the full signal chain for the LTC2265-12: differential analog input conditioning with adjustable common-mode bias (VCM1/VCM2), configurable reference routing (REFH/REFL/VREF/SENSE), and LVDS output termination (100 Ω on-chip, enabled via SDO). It supports both serial SPI programming (PAR/SER = GND) and parallel mode control (PAR/SER = VDD) for real-time configuration of sampling rate, output current (1.75 mA / 3.5 mA), and lane count.

Board-level design includes precision 50 Ω matched trace routing for ENC+/ENC–, OUT1A±/OUT1B±, OUT2A±/OUT2B±, and DCO+/FR+ pairs; dedicated ground planes for analog (GND), output driver (OGND), and exposed thermal pad (Pin 41); and on-board 0.1 µF/2.2 µF ceramic decoupling per supply rail (VDD, OVDD, REFH, REFL, VREF).

Key Specifications

Availability

DC1532A-K is available at Aetrix Electronics and suitable for software-defined radio development, cellular infrastructure prototyping, and portable medical imaging systems requiring stable component supply, traceable sourcing, and long-term evaluation board availability.

Supply support for DC1532A-K 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 semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement, communications, and industrial applications.

The DC1532A-K belongs to ADI's Linear Technology evaluation board portfolio, designed specifically to accelerate validation and system integration of high-speed ADCs like the LTC2265-12 in demanding RF and instrumentation applications.

FAQ

What is the primary function of the DC1532A-K evaluation board?

The DC1532A-K evaluation board is a fully assembled and tested platform for evaluating the LTC2265-12 12-bit, 65 Msps dual-channel ADC. It provides all necessary signal conditioning, clock distribution, power regulation, and LVDS output interfacing to enable rapid characterization of AC performance (SNR, SFDR), timing margins, and FPGA/JESD204B-compatible data capture - without requiring custom PCB design. DC1532A-K supports both serial and parallel configuration modes of the LTC2265-12.

Does the DC1532A-K support external clock sources, and what are the compatible input types?

Yes, the DC1532A-K accepts differential or single-ended encode clocks via SMA connectors labeled ENC+ and ENC–. Compatible input types include LVDS, PECL, TTL, CMOS, and sine wave signals - all within the LTC2265-12's specified voltage and common-mode ranges. The board includes on-board AC-coupling and biasing networks optimized for 1.8 V operation, and the internal duty cycle stabilizer ensures full-performance operation across 20%–80% clock duty cycles. DC1532A-K does not require external clock conditioning circuitry.

How is the reference configuration controlled on the DC1532A-K, and what input ranges are achievable?

Reference configuration on the DC1532A-K is controlled via the SENSE pin of the LTC2265-12, accessible through a test point and jumper option. Connecting SENSE to VDD selects the internal 1.25 V reference with ±1 V input range (2 V_P-P); connecting to GND selects ±0.5 V range (1 V_P-P). Applying 0.625–1.3 V externally to SENSE enables programmable full-scale range scaling. All configurations are validated on DC1532A-K with matching INL/DNL and SNR performance per the LTC2265-12 datasheet.

Can the DC1532A-K be used with Xilinx or Intel FPGAs, and what interface considerations apply?

Yes, the DC1532A-K is routinely used with Xilinx Kintex/Virtex and Intel Stratix/Arria FPGAs. Its LVDS outputs (OUT1A±/OUT1B±, OUT2A±/OUT2B±, DCO±, FR±) comply with ANSI TIA/EIA-644-A standards and are routed with controlled 100 Ω differential impedance. Users must configure FPGA I/O banks for LVDS_25 or LVDS signaling, assign correct pin locations per timing diagrams in the LTC2265-12 datasheet (e.g., tFRAME, tDATA, pipeline latency = 6 cycles), and implement proper source-synchronous capture using DCO as the sampling clock. DC1532A-K includes no built-in JESD204B encoder.

What power supply requirements does the DC1532A-K have, and how is thermal management handled?

The DC1532A-K requires a single +1.8 V, 2 A DC supply delivered via the J1 terminal block. On-board low-dropout regulators generate clean, isolated VDD (analog core), OVDD (LVDS drivers), and reference voltages - eliminating need for multiple supplies. Thermal management relies on the LTC2265-12's exposed pad (Pin 41), soldered directly to the board's internal ground plane and outer copper layers, achieving θ_JA = 32°C/W as specified. No heatsink or forced airflow is required for continuous 65 Msps operation at room temperature.