Analog Devices Inc. AD8214ARMZ

Overview

AD8214ARMZ from Analog Devices is a fast-response, high common-mode voltage current shunt comparator designed for high-side overcurrent detection in DC systems operating from 5 V to 65 V. It delivers <100 ns input-to-output propagation delay, 10 mV built-in hysteresis, and integrates a 2.4 V regulator referenced to VS for precise threshold setting. It is used in automotive motor controls and battery protection circuits where sub-100 ns fault response prevents FET or shunt damage.

For engineers reviewing the AD8214ARMZ datasheet, AD8214ARMZ pinout, AD8214ARMZ application, or AD8214ARMZ equivalent, key selection criteria include high-side rail compatibility (up to 65 V), nanosecond-level response time, integrated 2.4 V regulator for external threshold programming, and qualification for automotive temperature range (−40°C to +125°C).

Technical Context

The AD8214ARMZ uses a high-side–optimized comparator architecture with internal Zener-based 2.4 V regulator referenced to VS, enabling stable operation across 5 V–65 V supply rails while maintaining input common-mode tolerance up to VS + 0.2 V. Its differential input accepts up to ±500 mV, and output drives current (1 mA typical high, 100 nA low) into ground-referenced loads.

It implements fixed 10 mV hysteresis to suppress noise-induced chatter during slow current transitions, and its input offset voltage remains within ±8 mV over temperature. The device operates without external biasing-its internal regulator powers both core circuitry and user-defined threshold networks via external resistor dividers connected to VREG and +IN.

Key Specifications

Pinout & Package

AD8214ARMZ is housed in an 8-lead MSOP (RM-8) package per JEDEC MO-187-AA, with 0.65 mm pitch and 3.0 mm × 3.0 mm footprint. Pin 1 is marked with a dot; pins 4 and 7 are no-connect (NC) and must remain unconnected.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX40056ASA+T and TSC2010IDT, AD8214ARMZ uniquely combines sub-100 ns response, integrated 2.4 V regulator, and built-in 10 mV hysteresis in a single 8-lead MSOP-reducing design complexity and improving fault response predictability in automotive and industrial high-side sensing.

Availability

AD8214ARMZ is available at Aetrix Electronics and suitable for automotive motor controls, diesel injection systems, and battery management applications requiring stable component supply across extended temperature and voltage ranges.

Supply support for AD8214ARMZ 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 leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, and automotive markets.

The AD8214ARMZ belongs to Analog Devices' high-voltage current sense comparator product line, engineered specifically for nanosecond-speed overcurrent protection in harsh automotive and industrial environments.

FAQ

What is the maximum supply voltage the AD8214ARMZ can withstand continuously?

The AD8214ARMZ has a continuous operating supply voltage range of 5 V to 65 V, with an absolute maximum rating of 65 V. Its survival rating extends to 68 V for transient conditions such as automotive load dump, ensuring robustness in 12 V and 24 V battery systems. This specification is verified per Analog Devices' AD8214 Rev. A datasheet Table 2.

How does the AD8214ARMZ achieve high-side operation without external level shifting?

The AD8214ARMZ achieves true high-side operation by referencing all internal circuitry-including its comparator core and 2.4 V regulator-to the VS pin. Its inputs tolerate common-mode voltages up to VS + 0.2 V, allowing direct connection to the positive battery rail. No external level shifters, isolated supplies, or optocouplers are needed, unlike conventional ground-referenced comparators.

Can the AD8214ARMZ drive a standard CMOS logic input directly?

Yes-the AD8214ARMZ output is a current source (1 mA typical high, 100 nA low) that develops a logic-compatible voltage across an external pull-down resistor. With a 3.3 kΩ load to GND, it produces ~3.3 V high and ~33 mV low, meeting standard 3.3 V CMOS input thresholds. The datasheet confirms this behavior in Figure 5 and Table 1 under "Output Current" conditions.

What is the purpose of the VREG pin on the AD8214ARMZ?

The VREG pin delivers a stable 2.43 V output referenced to VS, used to generate a precise, temperature-stable threshold voltage for the +IN pin via an external resistor divider. This eliminates the need for external voltage references or regulators, simplifying overcurrent trip point design while maintaining accuracy across −40°C to +125°C per datasheet Figure 10 and Section "Setting the Input Threshold Voltage."

Does the AD8214ARMZ require external hysteresis components?

No-the AD8214ARMZ integrates 10 mV of hysteresis internally, eliminating the need for external positive feedback resistors. This hysteresis is factory-trimmed and remains stable across temperature (±2 mV variation, Figure 14), preventing output chatter during slow current transients near the trip threshold-confirmed in the "Comparator Offset and Hysteresis" section of the datasheet.