Analog Devices Inc. DC1796A-A

Overview

DC1796A-A from Analog Devices is a fully populated, ready-to-use demonstration board for the LTC6360 low-noise SAR ADC driver amplifier. It implements a unity-gain, single-supply 5V configuration with integrated 10Ω/330pF output filter, CPO/CPI charge pump decoupling (0.1µF), and 1µF/10µF supply bypassing. Designed for evaluating true-zero-output performance in high-precision data acquisition systems.

For engineers reviewing the DC1796A-A datasheet, DC1796A-A pinout, DC1796A-A application, or DC1796A-A equivalent, this board enables rapid validation of 110dB SNR at 3MHz bandwidth, –103dBc HD2 / –109dBc HD3 distortion at 40kHz, 150ns 16-bit settling, and rail-to-negative-rail output swing (–0.48V to 4.91V) under real-world ADC interface conditions.

Technical Context

The DC1796A-A implements the exact test circuit shown in LTC6360 Figure 1 and Figure 2, featuring a 5V single supply, 10Ω series output resistor, 330pF filter capacitor to ground, and 0.1µF CPI bypass to GND. It validates the on-chip charge pump's ability to deliver –0.6V at CPO while maintaining <11.5µVRMS output ripple.

This board supports evaluation of critical LTC6360 behaviors: input common-mode range (0V to 4.25V), shutdown functionality (SHDN pin logic-high enable), and thermal performance across –40°C to 125°C ambient via exposed-pad DFN mounting. No external gain-setting components are installed - it operates strictly as a unity-gain buffer.

Key Specifications

Availability

DC1796A-A is available at Aetrix Electronics and suitable for precision data acquisition, industrial sensor signal conditioning, and medical instrumentation requiring stable component supply and verified reference design implementation.

Supply support for DC1796A-A 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 semiconductors, serving precision measurement, communications, and industrial markets.

The DC1796A-A belongs to ADI's Linear Technology demonstration board family, designed specifically to accelerate evaluation and system integration of high-speed, low-noise amplifiers like the LTC6360 in demanding ADC driver applications.

FAQ

What is the primary function of the DC1796A-A demonstration board?

The DC1796A-A demonstration board is a fully assembled evaluation platform for the LTC6360 low-noise SAR ADC driver. It implements the manufacturer-recommended unity-gain configuration with 10Ω/330pF output filtering and 0.1µF CPI bypass to validate true-zero output swing, 110dB SNR, and low harmonic distortion under real-world conditions. DC1796A-A enables immediate bench testing without custom layout or component selection.

Does the DC1796A-A support gain configurations other than unity?

No - the DC1796A-A is configured exclusively as a unity-gain buffer per LTC6360 Figure 2. It provides direct +IN/–IN access points but does not include RF, RG, or RS components required for non-unity gain. To evaluate gain configurations, users must add external resistors per Figure 3 or Figure 4 in the LTC6360 datasheet. DC1796A-A's fixed layout ensures optimal noise and stability for baseline characterization only.

Which LTC6360 package variants are compatible with the DC1796A-A board?

The DC1796A-A board is mechanically and electrically designed for the 8-lead (3mm × 3mm) plastic DFN package (DD-8), matching LTC6360CDD, LTC6360IDD, and LTC6360HDD variants. It is not compatible with the MSOP-8 (MS8E) package due to footprint and exposed-pad differences. DC1796A-A requires the DFN version to ensure correct pin alignment, thermal pad soldering, and charge pump node routing.

How does the DC1796A-A implement the LTC6360's charge pump functionality?

The DC1796A-A connects the LTC6360's CPO pin directly to the CPI pin via a dedicated copper trace and places a 0.1µF ceramic capacitor from CPI to GND - exactly as specified in the LTC6360 datasheet for minimizing output ripple. This configuration validates the on-chip charge pump's ability to generate –0.6V at CPO and sustain >3.5mA sink current while maintaining <11.5µVRMS output ripple. DC1796A-A does not expose CPO/CPI for external adjustment.

Can the DC1796A-A be used to verify the LTC6360's shutdown current specification?

Yes - the DC1796A-A includes a SHDN test point and pull-up/pull-down options to apply logic-low (≤0.8V) or logic-high (≥2.0V) signals to the LTC6360's SHDN pin. When driven low, the board allows direct measurement of total shutdown current (ITOT(SHDN)), which is guaranteed ≤350µA per the LTC6360 datasheet. DC1796A-A's layout preserves the internal current paths needed to confirm this spec under actual operating conditions.