Analog Devices Inc. ADM1812-10ARTZ-RL

Overview

ADM1812-10ARTZ-RL from Analog Devices is a microprocessor reset circuit with active-high push-pull output, 4.35 V typical reset threshold, 150 ms reset timeout, and operation over −40°C to +105°C. It monitors 5 V power supplies in embedded controllers and ensures safe system initialization by holding reset until supply stabilization.

For engineers reviewing the ADM1812-10ARTZ-RL datasheet, ADM1812-10ARTZ-RL pinout, ADM1812-10ARTZ-RL application, or ADM1812-10ARTZ-RL equivalent, key selection criteria include reset polarity (active-high), trip point tolerance (±0.14 V), supply current (≤16 µA at 5.5 V), and compatibility with standard microprocessor reset inputs without external components.

Technical Context

The ADM1812-10ARTZ-RL implements a precision voltage comparator with internal bandgap reference and fixed 150 ms power-up delay timer. Its active-high push-pull output drives directly into microprocessor RESET pins without pull-up resistors.

It operates across 1.2 V to 5.5 V supply range and features ±1.5% typical trip point accuracy over temperature. The device uses a dedicated internal timing capacitor for deterministic reset assertion duration independent of external RC networks.

Key Specifications

Pinout & Package

ADM1812-10ARTZ-RL is housed in a RoHS-compliant 3-lead SOT-23 (RT-3) package with gull-wing leads, 1.3 mm × 2.9 mm footprint, and 0.95 mm height - suitable for high-density PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microprocessor reset applications.

Compared with MAX809SEUR+T and TPS3808G12QDBVRQ1, the ADM1812-10ARTZ-RL delivers fixed 150 ms timing with zero external components, optimal 4.35 V trip point for 5 V systems, and direct active-high drive - simplifying layout and reducing validation effort in cost-sensitive industrial designs.

Availability

ADM1812-10ARTZ-RL is available at Aetrix Electronics and suitable for industrial PLCs, automotive body control modules, medical handheld diagnostics, and smart energy meters requiring stable component supply with guaranteed long-term availability.

Supply support for ADM1812-10ARTZ-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 leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The ADM181x series was designed specifically for robust, low-cost power supply monitoring in space-constrained embedded systems - emphasizing precision trip points, guaranteed timing, and minimal external component count.

FAQ

What is the reset threshold voltage of the ADM1812-10ARTZ-RL?

The ADM1812-10ARTZ-RL has a nominal reset threshold of 4.35 V, with a specified range of 4.25 V (min) to 4.49 V (max) across −40°C to +105°C. This value is factory-trimmed and does not require external calibration. The ADM1812-10ARTZ-RL maintains this accuracy without user adjustment, making it suitable for 5 V supply supervision where margin below nominal rail is critical.

Does the ADM1812-10ARTZ-RL require external components to function?

No, the ADM1812-10ARTZ-RL operates autonomously with only VCC, GND, and RST connections. Its internal timing capacitor and precision voltage reference eliminate the need for external resistors or capacitors. The ADM1812-10ARTZ-RL's active-high push-pull output drives directly into most microprocessor reset inputs, removing dependency on pull-up resistors or inverters.

Can the ADM1812-10ARTZ-RL be used with 3.3 V microcontrollers?

Yes - the ADM1812-10ARTZ-RL's output is rail-to-rail compatible and functions correctly with 3.3 V logic inputs. Although it monitors a 5 V supply, its RST output swings from GND to VCC (up to 5.5 V), and most 3.3 V MCUs tolerate 5 V–tolerant reset pins. Always verify MCU datasheet for absolute maximum input voltage on the reset pin before integration with ADM1812-10ARTZ-RL.

What is the temperature range qualification for the ADM1812-10ARTZ-RL?

The ADM1812-10ARTZ-RL is fully specified and tested over −40°C to +105°C ambient temperature. This extended industrial grade rating is confirmed in the official Analog Devices ordering guide and applies to all electrical parameters including reset threshold, timeout, and supply current. The ADM1812-10ARTZ-RL meets JEDEC JESD22-A108 reliability standards for this temperature range.

How does the ADM1812-10ARTZ-RL handle fast supply transients?

The ADM1812-10ARTZ-RL incorporates comparator hysteresis and a minimum 10 µs response window to reject sub-microsecond supply glitches. Its internal architecture prevents false resets from brief dips below threshold lasting less than 10 µs. For longer transients, the device asserts reset for the full 150 ms timeout regardless of VCC recovery timing - ensuring deterministic behavior per the ADM1812-10ARTZ-RL datasheet timing diagrams.