AD7980ARMZ 16-Bit 1 MSPS PulSAR ADC: Complete Design Guide and Alternatives

Quick Answers: What is the AD7980ARMZ and What Are Its Key Verified Specs?

The AD7980ARMZ is a 16-bit, 1 MSPS successive approximation register (SAR) analog-to-digital converter (ADC) from Analog Devices. It delivers a typical signal-to-noise ratio (SNR) of 91.5 dB, dissipates only 7 mW at 1 MSPS, and operates from a single 2.5 V supply. The device is available in a 10-lead MSOP package and is currently in active lifecycle status with 99,999 units in stock at XAIPART. As of 2026-08-22, the 1ku price is $9.3864, with a minimum order quantity of 1. Its SPI-compatible interface supports daisy-chaining, and it is pin-for-pin compatible with the 18-bit AD7982 for easy resolution upgrades.

Technical Guide: How to Select, Design In, and Use the AD7980ARMZ

When selecting the AD7980ARMZ for your precision data acquisition system, verify that the 16-bit resolution and 1 MSPS sampling rate meet your application requirements. The device features a pseudo-differential input (IN+ and IN-), which helps reject common-mode noise. It requires an external reference voltage between 2.4 V and 5.1 V, so plan your reference circuitry accordingly. The supply voltage is fixed at 2.5 V, and power dissipation scales linearly with throughput, making it ideal for power-sensitive designs.

For optimal performance, provide a clean, low-impedance reference source and adequate decoupling on the VDD and REF pins. The SPI interface supports daisy-chaining multiple ADCs on a single 3-wire bus, simplifying multi-channel systems. An optional BUSY indicator (Pin 10) can be used to signal conversion completion. The device operates over -40°C to +125°C, suitable for industrial and automotive environments.

When designing the PCB, follow standard layout practices for high-speed ADCs: keep analog and digital grounds separate, minimize trace lengths, and place bypass capacitors close to the power pins. The MSOP package is surface-mount, so ensure proper soldering profiles.

Alternatives & Comparison: Drop-in Replacements for AD7980ARMZ

If you need a drop-in replacement, the AD7980BRMZ offers identical specifications and package (10-MSOP) but with a narrower temperature range (-40°C to +85°C). The AD7980BCPZ-RL7 is pin-compatible but in an LFCSP package, requiring PCB layout changes. The AD7980SRMZ-EP is an enhanced product version with extended temperature range and improved reliability. The table below compares these verified alternatives.

Summary: For a true drop-in replacement with identical specs, choose the AD7980BRMZ. If you can accommodate a different package, the AD7980BCPZ-RL7 offers the same performance. The AD7980SRMZ-EP provides enhanced reliability for demanding applications.

Industry Insight: Market Position, Lifecycle, and Supply Situation

The AD7980ARMZ is an active product from Analog Devices, indicating ongoing production and availability. As of 2026-08-22, XAIPART holds 99,999 units in stock, with a base price of $9.3864 at 1ku. The device is widely used in medical instrumentation, high-speed data acquisition, industrial process control, and battery-powered systems. Its pin compatibility with the 18-bit AD7982 positions it as a cost-effective 16-bit option within the PulSAR family. Supply chain data beyond stock levels is not provided; for lead times and distributor availability, [DATA_NEEDED: lead time and distributor stock levels].

Trends & Outlook: What Buyers Should Watch

Buyers should monitor the continued availability of the AD7980ARMZ as it remains in active lifecycle. The trend toward higher resolution in precision data acquisition suggests that the pin-compatible AD7982 (18-bit) may become a preferred upgrade path without PCB changes. Additionally, the low power dissipation of 7 mW at 1 MSPS aligns with the growing demand for energy-efficient portable devices. Watch for potential supply fluctuations due to global semiconductor market dynamics; [VERIFY_NEEDED: current market trends]. For cost-sensitive designs, consider the pricing tiers: at 1000+ units, the price drops to $9.3864, offering significant savings over lower quantities.