Analog Devices Inc. AD7980BCPZ-RL

Overview

AD7980BCPZ-RL 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. It samples IN+ relative to IN− over 0 V to VREF (2.5 V–5 V), supports SPI/QSPI/MICROWIRE-compatible 3-/4-wire serial interface, and targets high-precision data acquisition in harsh environments.

For engineers reviewing the AD7980BCPZ-RL datasheet, AD7980BCPZ-RL pinout, AD7980BCPZ-RL application, or AD7980BCPZ-RL equivalent, key selection considerations include its 1 MSPS throughput at 2.5 V supply, 7 mW total power at full rate, daisy-chain capability, busy indicator support, and dual-package availability in 10-lead LFCSP (this variant) and MSOP.

Technical Context

The AD7980BCPZ-RL implements a true SAR conversion architecture with no pipeline delay-conversion results are available immediately after completion. Its zero-latency design ensures deterministic timing between CNV rising edge and data availability (500–800 ns), critical for real-time control loops.

It features a proprietary serial interface supporting three operational modes: CS mode (with optional busy indicator), 4-wire CS mode, and chain mode for multi-ADC daisy-chaining. Digital I/O operates independently via VIO (1.71 V–5.5 V), enabling seamless interfacing with 1.8 V, 2.5 V, 3 V, or 5 V logic systems without level shifters.

Key Specifications

Pinout & Package

Housed in a 10-lead, 3 mm × 3 mm LFCSP package with exposed pad (EPAD) connected to GND for thermal and EMI performance. Pinout matches MSOP but with different physical layout and improved thermal resistance (θJA = 200°C/W, θJC = 44°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7980BCPZ-RL, AD7988-1BCPZ-RL trades SNR for lower power in identical form factor, while AD4003BRMZ improves signal fidelity and simplifies reference design but sacrifices daisy-chain flexibility and thermal efficiency of LFCSP.

Availability

AD7980BCPZ-RL is available at Aetrix Electronics and suitable for automated test equipment, medical instruments, and machine automation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for AD7980BCPZ-RL 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 operations worldwide.

The AD7980BCPZ-RL belongs to Analog Devices' PulSAR® family of precision SAR ADCs, engineered for high-speed, low-power, and wide-temperature industrial and instrumentation applications where accuracy, reliability, and interface flexibility are critical.

FAQ

What is the maximum operating temperature for the AD7980BCPZ-RL?

The AD7980BCPZ-RL is fully specified from −40°C to +125°C, with all electrical parameters-including INL, SNR, and throughput-guaranteed across this range. Its LFCSP package and internal design support reliable operation in under-hood automotive and industrial motor control environments where ambient temperatures exceed 105°C.

Does the AD7980BCPZ-RL require an external reference voltage?

Yes, the AD7980BCPZ-RL requires an external reference voltage applied to the REF pin, which must be between 2.4 V and 5.1 V. The device does not include an internal reference; accuracy and dynamic range scale directly with reference stability and noise-Analog Devices recommends low-drift, low-noise references such as ADR4550 or REF102.

Can the AD7980BCPZ-RL interface directly with a 1.8 V microcontroller?

Yes, the AD7980BCPZ-RL supports 1.8 V logic levels via its dedicated VIO supply pin (1.71 V–5.5 V). When VIO = 1.8 V, digital inputs (CNV, SCK, SDI) accept standard 1.8 V CMOS thresholds, and SDO outputs are compatible with 1.8 V receivers-no level-shifting circuitry is needed.

How does the daisy-chain mode work on the AD7980BCPZ-RL?

In daisy-chain mode, the AD7980BCPZ-RL uses SDI as both configuration input and data-in path: when SDI is low at the CNV rising edge, the device enters chain mode. Conversion results from upstream ADCs propagate through SDI → internal register → SDO with 16-cycle delay, allowing multiple AD7980BCPZ-RL devices to share one SDO line and three wires (SCK, CNV, SDI).

What is the power dissipation of the AD7980BCPZ-RL at 10 kSPS?

At 10 kSPS, the AD7980BCPZ-RL dissipates just 70 µW total-comprising ~40 µW from VDD, ~20 µW from REF, and ~10 µW from VIO. This ultra-low standby power enables energy-efficient wake-on-event architectures in battery-powered data loggers and wireless sensor nodes.