Analog Devices Inc. AD8214ARMZ-RL

Overview

AD8214ARMZ-RL from Analog Devices is a high-voltage, fast-response current shunt comparator designed for high-side overcurrent detection in DC systems operating from 5 V to 65 V. It features <100 ns input-to-output propagation delay, 10 mV built-in hysteresis, integrated 2.4 V regulator referenced to VS, and operates across –40°C to +125°C - enabling real-time protection in automotive motor controls and battery management.

For engineers reviewing the AD8214ARMZ-RL datasheet, AD8214ARMZ-RL pinout, AD8214ARMZ-RL application, or AD8214ARMZ-RL equivalent, key selection criteria include high common-mode voltage tolerance (up to 68 V survival), current-output architecture compatible with ground-referenced loads, and precise threshold setting via external resistor divider on VREG.

Technical Context

The AD8214ARMZ-RL implements a high-side–optimized comparator with internal Zener-based 2.4 V regulator referenced to VS, enabling direct threshold configuration without external references. Its differential inputs operate with common-mode range from VS – 0.9 V to VS + 0.2 V, supporting sensing across shunts placed between supply and load.

It delivers a current-source output (1 mA typical high, 100 nA low) compliant with load voltages from 0 V to VS – 2.4 V, and integrates 10 mV hysteresis to suppress noise-induced false triggering during slow current transients near threshold.

Key Specifications

Pinout & Package

AD8214ARMZ-RL is housed in an 8-lead MSOP (RM-8) package per JEDEC MO-187-AA, with 0.65 mm pitch and exposed pad not connected internally.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side current shunt comparator applications.

Compared with MAX40056ATA+T and INA301A3IDR, AD8214ARMZ-RL uniquely combines sub-100 ns response, 65 V operating range, and user-adjustable threshold via its 2.4 V regulator - making it optimal for automotive-grade high-speed overcurrent protection where both flexibility and speed are critical.

Availability

AD8214ARMZ-RL is available at Aetrix Electronics and suitable for automotive motor controls, battery management systems, and DC-DC converter overcurrent protection requiring stable component supply across extended temperature and voltage ranges.

Supply support for AD8214ARMZ-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 is a global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control.

The AD8214ARMZ-RL belongs to Analog Devices' high-voltage current sense comparator product line, engineered specifically for robust, ultrafast overcurrent detection in automotive and industrial power systems.

FAQ

What is the maximum common-mode voltage the AD8214ARMZ-RL can survive?

The AD8214ARMZ-RL has an absolute maximum continuous input voltage rating of 68 V, meaning it can withstand transient overvoltages up to that level without damage - critical for automotive load-dump scenarios. Its operational common-mode range remains 5 V to 65 V, and this 68 V survival rating is verified per Absolute Maximum Ratings Table 2 in the official datasheet.

How does the AD8214ARMZ-RL set its comparison threshold?

The AD8214ARMZ-RL uses its internal 2.4 V regulator (pin 3, VREG) to generate a stable reference voltage referenced to VS. A resistor divider between VREG and GND connects to +IN (pin 2), allowing users to set the exact threshold voltage - for example, 75 mV - using Equation (1) from the datasheet. This method avoids external references and maintains accuracy across temperature.

Can the AD8214ARMZ-RL drive a standard logic input directly?

Yes - the AD8214ARMZ-RL's current-source output (pin 5) can drive a ground-referenced pull-down resistor to generate a clean logic-high signal. With a 3.3 kΩ load, it delivers ~3.3 V at the node when sourcing 1 mA, fully compatible with 3.3 V CMOS inputs. No level shifter or buffer is required, simplifying interface design.

Is the AD8214ARMZ-RL qualified for automotive applications?

Yes - the AD8214ARMZ-RL is manufactured and tested to meet AEC-Q100 requirements for automotive use, with full qualification across –40°C to +125°C. While the "W" grade (e.g., AD8214WYRMZ) denotes enhanced automotive process control, the AD8214ARMZ-RL shares identical electrical specs and temperature rating, and is widely deployed in production automotive systems.

What is the purpose of the two NC pins on the AD8214ARMZ-RL?

Pins 4 and 7 of the AD8214ARMZ-RL are designated No Connect (NC) - they are not bonded to the die and serve no electrical function. Per the Pin Configuration diagram (Figure 3) and Table 3 in the datasheet, these pins must remain unconnected in layout to avoid unintended coupling or mechanical stress. Leaving them floating is safe and required for proper operation.