Analog Devices Inc. AD7980ARMZ

Overview

AD7980ARMZ from Analog Devices is a 16-bit, 1 MSPS successive approximation register (SAR) analog-to-digital converter with pseudo-differential input, zero-latency architecture, ±1.25 LSB max INL, 91.5 dB SNR at 10 kHz, and operation from −40°C to +125°C - used in high-precision data acquisition for medical instruments and automated test equipment.

For engineers reviewing the AD7980ARMZ datasheet, AD7980ARMZ pinout, AD7980ARMZ application, or AD7980ARMZ equivalent, this page delivers verified electrical parameters, MSOP/LFCSP package mapping, SPI/QSPI-compatible serial interface behavior, and real-world timing constraints for embedded signal chain design.

Technical Context

The AD7980ARMZ employs a true SAR architecture with internal sampling capacitor array and proprietary charge redistribution logic, enabling 16-bit no-missing-codes performance without pipeline delay. Its zero-latency conversion ensures deterministic timing between CNV rising edge and valid SDO output.

It supports three digital interface modes - CS mode (with/without busy indicator), 4-wire CS mode, and daisy-chain mode - all synchronized to SCK and compatible with 1.8 V to 5 V logic via dedicated VIO supply. Acquisition time is fixed at 290 ns, independent of throughput.

Key Specifications

Pinout & Package

AD7980ARMZ is available in a 10-lead MSOP (RM-10) package with exposed pad, rated for −40°C to +125°C operation. Thermal resistance θJA = 200°C/W (JEDEC 2S2P board). The exposed pad must be connected to GND for optimal thermal performance but is not required for electrical functionality.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed precision SAR ADC applications.

Compared with AD7980ARMZ, AD7988-5ACPZ-RL7 trades speed for lower power in identical form factor, while AD7693BRMZ removes reference design complexity at the cost of adjustable full-scale range and peak SNR - both require revalidation of timing margins and noise floor in target signal chains.

Availability

AD7980ARMZ is available at Aetrix Electronics and suitable for medical instrumentation, automated test equipment, and industrial data acquisition systems requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for AD7980ARMZ 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. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with R&D and manufacturing infrastructure spanning North America, Europe, and Asia.

The AD7980ARMZ belongs to Analog Devices' precision SAR ADC product line, engineered for high-resolution, low-latency data acquisition in demanding industrial, medical, and test equipment applications where accuracy, speed, and thermal robustness are critical.

FAQ

What is the maximum operating temperature for the AD7980ARMZ?

The AD7980ARMZ is fully specified from −40°C to +125°C ambient temperature. Its thermal resistance (θJA = 200°C/W) and junction temperature limit of 150°C allow reliable operation in extended industrial and automotive under-hood environments when mounted on a properly designed PCB with adequate copper pour and thermal vias.

Does the AD7980ARMZ require an external voltage reference?

Yes, the AD7980ARMZ requires an external voltage reference applied to the REF pin, which accepts 2.4 V to 5.1 V. The reference load current is 330 µA at 1 MSPS, so a low-noise, low-output-impedance reference IC (e.g., ADR4550) or buffered precision DAC output is recommended to maintain 16-bit linearity and SNR performance.

Can the AD7980ARMZ interface directly with a 1.8 V microcontroller?

Yes, the AD7980ARMZ supports 1.8 V logic via its dedicated VIO supply pin (1.71 V to 5.5 V). When VIO = 1.8 V, VIH threshold is ~1.62 V and VIL is ~0.18 V, ensuring safe and noise-immune communication with 1.8 V MCUs without level-shifting circuitry.

What is the acquisition time of the AD7980ARMZ and how does it affect system timing?

The AD7980ARMZ has a fixed acquisition time of 290 ns, defined as the minimum time required for the internal sampling capacitor to settle after the CNV rising edge. This value is independent of throughput and must be accounted for in total conversion cycle time - especially at 1 MSPS, where tCYC = 1000 ns leaves only 710 ns for conversion and data readout.

How does the daisy-chain mode work on the AD7980ARMZ?

In daisy-chain mode, the AD7980ARMZ uses SDI as both mode select (low at CNV edge) and data-in path: the SDI input receives the SDO output of the preceding ADC in the chain, delays it by exactly 16 SCK cycles, and outputs it on its own SDO pin - enabling N ADCs to share one serial bus with minimal controller overhead and no additional chip-select lines.