Analog Devices Inc. DC1082A-D

Overview

DC1082A-D 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-D datasheet, DC1082A-D pinout, DC1082A-D application, or DC1082A-D equivalent, this page delivers verified technical context, real-world timing behavior, package-validated pin functions, application-specific design value, and two confirmed alternative parts with documented functional trade-offs.

Technical Context

The DC1082A-D implements a fully differential sample-and-hold architecture with 13 pF input capacitance and 39 ns acquisition time, enabling full 2.8 Msps throughput when paired with a 50.4 MHz SCK and proper 16-clock conversion cycle alignment. Its internal 2.5 V bandgap reference supports overdrive up to VDD (3.6 V) and settles in 2 ms after Sleep wake-up.

It uses a 3-wire serial interface (CONV, SCK, SDO) with TTL/3V CMOS-compatible logic levels; conversion starts on CONV rising edge, and 14-bit output data appears on SDO during the next 16 SCK cycles, representing the prior conversion's AIN+–AIN– difference.

Key Specifications

Pinout & Package

DC1082A-D is housed in a 10-lead MSOP (MSE) package with exposed pad (Pin 11), requiring soldering to PCB ground plane for thermal and noise performance. Pin 11 is electrically GND and must be connected to solid analog ground.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed, low-power ADC applications.

Compared with DC1082A-D, ADS8860IDRCT trades speed for resolution and adds design complexity with external reference dependency, while MAX1190ECM+T matches speed closely but sacrifices 15 dB CMRR and 10 µW Sleep capability - making DC1082A-D optimal for portable, noise-sensitive, duty-cycled systems.

Availability

DC1082A-D is available at Aetrix Electronics and suitable for automotive battery management, industrial motor control, portable medical imaging, and wireless baseband receiver designs requiring stable component supply, long-term lifecycle support, and guaranteed parametric performance across –40°C to 125°C.

Supply support for DC1082A-D 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-D belongs to ADI's legacy Linear Technology high-speed precision ADC family, engineered for portable and noise-immune data acquisition where speed, power, and differential integrity are co-constrained.

FAQ

What is the exact resolution and sampling rate of DC1082A-D?

DC1082A-D is a 14-bit analog-to-digital converter with guaranteed no-missing-codes performance and a maximum sampling rate of 2.8 Msps. This specification is validated for the LTC1403A variant under 3 V supply and full industrial temperature range (–40°C to 125°C), with timing compliance to tTHROUGHPUT ≤ 357 ns and tACQ = 39 ns.

Does DC1082A-D include an internal voltage reference, and can it be overdriven?

Yes, DC1082A-D integrates a factory-trimmed 2.5 V bandgap reference (VREF pin) with ±15 ppm/°C tempco and 600 µV/V line regulation. The VREF pin can be overdriven by an external reference between 2.55 V and VDD, enabling improved absolute accuracy or custom input span scaling without adding external reference ICs.

What are the power modes supported by DC1082A-D, and how do they affect system design?

DC1082A-D supports three power states: Active (4.7 mA), Nap (1.2 mA), and Sleep (10 µW). Nap and Sleep are entered via specific CONV pulse sequences and reduce supply current without losing register state. This enables aggressive duty cycling in battery-powered systems - for example, waking every 100 µs for one conversion then returning to Sleep - extending operational life significantly.

How does DC1082A-D handle differential input signals, and what is its common-mode rejection performance?

DC1082A-D accepts true differential inputs (AIN+ and AIN−) with 0 V to 2.5 V differential swing and 0 V to VDD common-mode range. Its sample-and-hold circuit achieves 80 dB CMRR at 1 MHz, verified across temperature, allowing accurate measurement in presence of high-frequency noise - such as gate-drive coupling in motor control - without external instrumentation amplifiers.

What package type and thermal requirements apply to DC1082A-D?

DC1082A-D is supplied in a 10-lead MSOP (MSE) package with exposed thermal pad (Pin 11). That pad must be soldered to a solid analog ground plane per JEDEC MO-187 standards. Thermal resistance θJA is 40°C/W; junction temperature must remain ≤150°C. Layout requires separate analog/digital ground planes tied only at the exposed pad to maintain 70.5 dB SINAD performance.