Analog Devices Inc. DC1762A-E

Overview

DC1762A-E from Analog Devices (formerly Linear Technology) is a high-performance evaluation board for the LTC2162 16-bit, 65Msps analog-to-digital converter. It enables full characterization of AC performance (77dB SNR, 90dB SFDR), low-jitter sampling (0.07psRMS), and flexible digital output modes (CMOS/DDR CMOS/DDR LVDS) in communications and instrumentation applications.

For engineers reviewing the DC1762A-E datasheet, DC1762A-E pinout, DC1762A-E application, or DC1762A-E equivalent, this board provides validated signal integrity, clock distribution, and layout-optimized analog input path - critical for evaluating undersampling at IF frequencies up to 140MHz, configuring SPI-controlled operating modes, and verifying power sequencing across VDD (1.8V) and OVDD (1.2–1.8V) rails.

Technical Context

The DC1762A-E implements a complete signal chain around the LTC2162 ADC, featuring a transformer-coupled differential analog input path with selectable 1VP-P to 2VP-P range, precision 1.25V internal reference, and configurable clock conditioning via ENC+/ENC– inputs supporting sine wave, PECL, LVDS, TTL, or CMOS drive. It supports all three output formats - full-rate CMOS, DDR CMOS, and DDR LVDS - with independent OVDD supply routing.

On-board SPI interface enables real-time configuration of key features including clock duty cycle stabilizer, data output randomizer, shutdown/nap modes, and PAR/SER programming mode selection. The board includes dedicated test points for AIN+, AIN–, CLKOUT+, CLKOUT–, D0–D15, and SDO, facilitating oscilloscope-based timing validation and FFT analysis per JEDEC JESD204B-compliant measurement practices.

Key Specifications

Availability

DC1762A-E is available at Aetrix Electronics and suitable for cellular base station development, software-defined radio prototyping, portable medical imaging systems, and multichannel data acquisition requiring stable component supply and traceable evaluation hardware.

Supply support for DC1762A-E 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 signal chain applications.

The DC1762A-E belongs to Analog Devices' LTC evaluation board family, designed specifically to accelerate time-to-test for high-speed ADCs used in demanding RF, instrumentation, and communications systems where dynamic range and jitter sensitivity are critical.

FAQ

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

The DC1762A-E evaluation board is a fully assembled and tested platform for the LTC2162 16-bit, 65Msps analog-to-digital converter. It provides immediate access to all key interfaces - analog input, clock, digital outputs, and SPI configuration - enabling rapid validation of AC performance metrics like SNR, SFDR, and transition noise under real-world signal conditions. The DC1762A-E supports both single-ended and differential encode modes and allows direct measurement of pipeline latency and data-to-clock skew.

Does the DC1762A-E support DDR LVDS output mode for the LTC2162?

Yes, the DC1762A-E fully supports DDR LVDS output mode for the LTC2162. It routes all differential data pairs (D0_1± through D14_15±), CLKOUT±, and OF± to edge-mounted SMA connectors with controlled 100Ω differential impedance. The board provides on-board termination resistors and configurable OVDD (1.8V) supply, meeting the LTC2162's LVDS specification for 3.5mA or 1.75mA output current and common-mode voltage of 1.125V–1.375V.

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

No - the DC1762A-E is specifically optimized for the LTC2162 (65Msps) and is not validated for LTC2161 (40Msps) or LTC2160 (25Msps). While pin-compatible, these variants differ in internal clocking architecture, power consumption profiles, and timing margins. Analog Devices specifies separate evaluation boards - DC1761A for LTC2161 and DC1760A for LTC2160 - to ensure accurate characterization of sample rate-dependent parameters such as SNR roll-off, SFDR harmonic behavior, and sleep/nap mode transitions.

How does the DC1762A-E handle clock jitter and duty cycle stabilization?

The DC1762A-E preserves the LTC2162's ultralow 0.07psRMS jitter by implementing a low-noise clock distribution network with ferrite-bead isolation and dedicated ground return paths. It supports optional clock duty cycle stabilization via the CS pin, allowing full-speed operation even with non-50% duty cycle clocks - a feature verified using on-board test points for ENC+ and ENC–. The board includes SMA inputs for both single-ended and differential clock sources, with matching network tuning for PECL/LVDS compatibility.

What power supply requirements must be met to operate the DC1762A-E?

The DC1762A-E requires two regulated supplies: +1.8V @ ≥100mA for VDD (analog core) and +1.2V to +1.8V @ ≥50mA for OVDD (digital outputs), with separate ground returns (GND and OGND). The board includes on-board LDOs and filtering capacitors but mandates clean, low-ripple sources - especially for VDD, where noise directly impacts SNR. Power sequencing is not required, but VDD must be stable before applying encode signals to avoid latch-up per Absolute Maximum Ratings.