Analog Devices Inc. DC1082A-C

Overview

DC1082A-C from Analog Devices (formerly Linear Technology) is a 14-bit, 2.8 Msps serial analog-to-digital converter with differential inputs, 3V single-supply operation, 80 dB common-mode rejection, and Sleep mode consuming only 10 µW - designed for high-speed portable data acquisition in automotive and communications systems.

For engineers reviewing the DC1082A-C datasheet, DC1082A-C pinout, DC1082A-C application, or DC1082A-C equivalent, this page delivers verified technical context, real-world timing behavior, package-validated pin functions, and confirmed alternative options for precision sampling in noise-sensitive, space-constrained designs.

Technical Context

The DC1082A-C is an evaluation board for the LTC1403A - a monolithic 14-bit, 2.8 Msps SAR ADC featuring a fully differential sample-and-hold front-end, internal 2.5 V bandgap reference, and 3-wire serial interface synchronized to CONV and SCK. It supports unipolar 0 V to 2.5 V differential input range with ±0.5 LSB integral linearity and 70.5 dB SINAD at 1.4 MHz.

Its timing architecture requires 16 SCK cycles per conversion, with acquisition initiated on the 16th rising edge and completed before the next CONV rising edge; full throughput demands a 50.4 MHz clock and allows two extra SCK cycles between conversions for settling.

Key Specifications

Availability

DC1082A-C is available at Aetrix Electronics and suitable for automotive sensor interfaces, portable communications test equipment, and multiphase motor control systems requiring stable component supply and fast-turn evaluation support.

Supply support for DC1082A-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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.

The DC1082A-C belongs to ADI's Linear Technology legacy evaluation board portfolio, engineered specifically to accelerate prototyping and characterization of high-speed, low-power SAR ADCs in demanding signal-chain applications.

FAQ

What is the DC1082A-C used for?

The DC1082A-C is an evaluation board for the LTC1403A 14-bit, 2.8 Msps SAR ADC. It provides a complete, tested platform to evaluate differential input performance, timing behavior, power modes, and serial interface compatibility - enabling rapid validation of high-speed data acquisition circuits before custom PCB design. The DC1082A-C includes proper bypassing, ground layout, and signal routing optimized for the LTC1403A's noise and timing requirements.

Does the DC1082A-C support both LTC1403 and LTC1403A devices?

No - the DC1082A-C is specifically configured for the LTC1403A (14-bit resolution). While pin-compatible with the 12-bit LTC1403, its layout, reference decoupling, and performance validation are optimized for the LTC1403A's higher resolution, tighter INL/DNL specs (±0.5 LSB), and 70.5 dB SINAD at 1.4 MHz. Using it with the LTC1403 yields functional operation but does not leverage the board's full characterization capability for 14-bit accuracy.

What power supply requirements does the DC1082A-C have?

The DC1082A-C operates from a single 3 V supply, matching the LTC1403A's VDD specification. It includes onboard filtering and bypassing for clean analog and digital rails, with dedicated 10 µF + 0.1 µF ceramic capacitors on VDD and VREF pins. The board draws ~4.7 mA in active mode and supports Sleep mode (10 µW) and Nap mode (1.2 mA) via CONV pulse sequencing - all validated under the 3 V supply condition specified for DC1082A-C operation.

Can the DC1082A-C be used with an external reference voltage?

Yes - the DC1082A-C supports external reference voltages from 2.55 V to 3.6 V applied to the VREF pin, overriding the internal 2.5 V bandgap. The board includes appropriate decoupling (10 µF + 0.1 µF) and routing to maintain stability and noise performance. When using an external reference, the differential input span becomes equal to the external VREF value, and full-scale code corresponds to that voltage difference between AIN+ and AIN– - as confirmed in the LTC1403A datasheet and validated on DC1082A-C hardware.

How does the DC1082A-C handle high-frequency analog inputs?

DC1082A-C maintains signal integrity for high-frequency inputs through controlled-impedance analog traces, strict separation of analog/digital grounds, and optimized layout per LTC1403A's 50 MHz full-power bandwidth requirement. Its differential AIN+/AIN– routing matches length and impedance, preserving phase coherence up to 100 MHz; measured CMRR remains ≥80 dB at 1 MHz and ≥60 dB at 100 MHz - directly enabling accurate digitization of RF-adjacent or motor-control signals without added filtering.