Analog Devices Inc. AD7980BRMZ

Overview

AD7980BRMZ from Analog Devices is a 16-bit, 1 MSPS pseudo-differential successive approximation register (SAR) analog-to-digital converter with zero-latency architecture, ±0.6 LSB typical INL, 91.5 dB SNR at 10 kHz, and operation from a single 2.5 V supply - used in high-precision data acquisition for medical instruments and automated test equipment.

For engineers reviewing the AD7980BRMZ datasheet, AD7980BRMZ pinout, AD7980BRMZ application, or AD7980BRMZ equivalent, this page delivers verified electrical specifications, package mapping to 10-lead MSOP/LFCSP, interface timing constraints for SPI/QSPI/daisy-chain modes, and real-world design implications of its 70 µW standby power and 290 ns acquisition time.

Technical Context

The AD7980BRMZ implements a true SAR conversion architecture with no pipeline delay, delivering conversion results immediately after completion - enabling deterministic real-time control loops. Its pseudo-differential input accepts 0 V to VREF (2.5 V–5 V) on IN+ relative to IN−, with 60 dB CMRR at 100 kHz and 10 MHz −3 dB input bandwidth.

It features a dual-supply digital interface: VDD powers the core ADC (2.375 V–2.625 V), while VIO independently sets logic levels (1.71 V–5.5 V) for SPI-compatible serial communication, supporting daisy-chain mode with busy indicator and 3-/4-wire CS configurations.

Key Specifications

Pinout & Package

AD7980BRMZ is available in two RoHS-compliant packages: 10-lead MSOP (RM-10) and 10-lead 3 mm × 3 mm LFCSP (CP-10), both rated for −40°C to +125°C operation. The exposed pad in LFCSP must be connected to GND for 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 AD7980BRMZ, AD7984BRMZ trades higher resolution for greater thermal sensitivity above 85°C, while AD7693BRMZ sacrifices speed and interface flexibility to reduce component count and power - making AD7980BRMZ optimal for 1 MSPS industrial DAQ requiring robust timing control and wide temperature operation.

Availability

AD7980BRMZ is available at Aetrix Electronics and suitable for medical instrumentation, automated test equipment, industrial data acquisition systems, and machine automation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for AD7980BRMZ 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 design centers worldwide and a 50+ year heritage in precision data conversion.

The AD7980BRMZ belongs to Analog Devices' precision SAR ADC product line, engineered for applications demanding high resolution, low latency, and guaranteed monotonicity - particularly in industrial, medical, and test & measurement systems where measurement integrity is non-negotiable.

FAQ

What is the maximum operating temperature for AD7980BRMZ?

The AD7980BRMZ is fully specified from −40°C to +125°C across all electrical parameters including INL, SNR, and throughput. At temperatures above 85°C, its maximum throughput derates to 833 kSPS when VIO is above 2.3 V - a constraint documented in Table 4 of the Rev. G datasheet. This rating applies to both MSOP and LFCSP package variants of AD7980BRMZ.

Does AD7980BRMZ require an external reference voltage?

Yes, AD7980BRMZ requires an external reference voltage applied to the REF pin, which must be between 2.4 V and 5.1 V. It does not include an internal reference. The reference voltage directly defines the full-scale input range (0 V to VREF) and impacts key AC performance metrics including SNR and THD - for example, SNR drops from 91.5 dB at VREF = 5 V to 86.8 dB at VREF = 2.5 V. This requirement applies identically across all AD7980BRMZ units.

Can AD7980BRMZ interface directly with a 1.8 V microcontroller?

Yes, AD7980BRMZ supports direct interface with 1.8 V microcontrollers via its dedicated VIO pin, which accepts 1.71 V to 5.5 V logic supplies. When VIO = 1.8 V, the digital inputs (CNV, SDI, SCK) recognize VIH ≥ 1.62 V and VIL ≤ 0.18 V, while SDO outputs VOH ≥ 1.5 V and VOL ≤ 0.4 V - meeting standard 1.8 V CMOS thresholds. This capability is inherent to every AD7980BRMZ device and does not require external level shifters.

What is the acquisition time specification for AD7980BRMZ?

The acquisition time for AD7980BRMZ is 290 ns, defined as the minimum time required for the internal sampling capacitor to settle to within ½ LSB after the CNV rising edge. This parameter is fixed across all operating conditions and directly constrains the bandwidth and settling time of the preceding driver amplifier - for instance, a 10 Ω series resistor with 10 nF decoupling yields ~230 ns RC time constant, leaving margin for amplifier slewing. This value is consistent for all AD7980BRMZ units regardless of grade or package.

Is AD7980BRMZ pin-compatible with other 10-lead SAR ADCs in Analog Devices' portfolio?

AD7980BRMZ shares identical pinout and footprint with AD7984BRMZ, AD7988-5BRMZ, and AD7983BRMZ - all 10-lead MSOP/LFCSP devices using the same REF/VDD/IN+/IN−/GND/CNV/SDO/SCK/SDI/VIO arrangement shown in Figures 3 and 4 of the datasheet. However, functional differences (e.g., resolution, throughput, reference handling) mean PCB layout reuse does not guarantee drop-in replacement - each variant must be validated for timing, power, and signal integrity in the target application.