Analog Devices Inc. ADM1816-R22AKS-RL7

Overview

ADM1816-R22AKS-RL7 from Analog Devices is a precision 3-lead SC70-packaged microprocessor reset circuit with active-low open-drain output and internal 5.5 kΩ pull-up resistor, designed for monitoring 2.5 V supply rails. It features a typical reset threshold of 2.18 V, 150 ms reset timeout, −40°C to +105°C operating range, and ultra-low quiescent current (≤10 µA at 3.6 V), enabling reliable power-on initialization in space-constrained embedded controllers.

For engineers reviewing the ADM1816-R22AKS-RL7 datasheet, ADM1816-R22AKS-RL7 pinout, ADM1816-R22AKS-RL7 application, or ADM1816-R22AKS-RL7 equivalent, key selection criteria include its 2.18 V trip point accuracy, SC70 package footprint compatibility, open-drain interface with integrated pull-up, reset timing stability over temperature, and suitability for low-voltage microcontroller reset supervision in industrial and automotive environments.

Technical Context

The ADM1816-R22AKS-RL7 implements a bandgap-based voltage reference comparator with hysteresis and a fixed 150 ms power-up reset delay timer. Its internal architecture ensures monotonic detection of VCC falling below 2.18 V (typ) and holds RST low for ≥100 ms after recovery, preventing premature processor release during brownout conditions.

This device belongs to the ADM181x family's open-drain, active-low subgroup (ADM1811/ADM1813/ADM1816/ADM1818) and shares functional block structure with internal bias generation, temperature-compensated threshold detection, and push-pull-free output stage-eliminating need for external pull-up resistors in most host MCU interfaces.

Key Specifications

Pinout & Package

ADM1816-R22AKS-RL7 is housed in a 3-lead SC70 (KS-3) package with gull-wing leads, compliant with EIAJ SC70 standards and RoHS-compliant (Z suffix). Pin 1 = VCC, Pin 2 = GND, Pin 3 = RST (active-low open-drain).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage monitor with reset applications.

Compared with MAX6326-L23T+ and TPS3808G12DBVR, the ADM1816-R22AKS-RL7 delivers tighter 2.18 V trip accuracy for marginal 2.5 V rails, integrates pull-up to reduce component count, and fits SC70 footprint-making it optimal for high-density, cost-sensitive industrial and automotive reset supervision where fixed threshold suffices.

Availability

ADM1816-R22AKS-RL7 is available at Aetrix Electronics and suitable for industrial PLCs, automotive body control units, portable medical devices, and smart energy meters requiring stable component supply with guaranteed long-term manufacturability and extended temperature support.

Supply support for ADM1816-R22AKS-RL7 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, serving industrial, automotive, communications, and healthcare markets since 1965.

The ADM181x series was engineered specifically for cost-sensitive, space-constrained microprocessor reset supervision-emphasizing low ICC, small footprint, and guaranteed reset timing without external components.

FAQ

What is the exact reset threshold voltage of the ADM1816-R22AKS-RL7?

The ADM1816-R22AKS-RL7 has a guaranteed reset threshold range of 2.12 V (minimum) to 2.25 V (maximum) at −40°C to +105°C, with 2.18 V being the typical value. This threshold is factory-trimmed and specified in Table 1 of the Rev. F datasheet, ensuring precise supervision of 2.5 V supply rails under worst-case conditions.

Does the ADM1816-R22AKS-RL7 require an external pull-up resistor?

No, the ADM1816-R22AKS-RL7 does not require an external pull-up resistor. It integrates a 3.5 kΩ to 7.5 kΩ internal pull-up resistor on the RST pin, enabling direct connection to standard 3.3 V or 5 V microcontroller reset inputs without additional components-reducing BOM count and layout complexity.

What package type and dimensions does the ADM1816-R22AKS-RL7 use?

The ADM1816-R22AKS-RL7 uses the SC70-3 (KS-3) package, measuring 2.00 mm × 1.25 mm × 0.90 mm with gull-wing leads. Its outline complies with EIAJ SC70 standards and is documented in Figure 16 of the Rev. F datasheet, offering 42% smaller footprint than equivalent SOT-23 variants.

Can the ADM1816-R22AKS-RL7 be used in automotive applications?

Yes, the ADM1816-R22AKS-RL7 is qualified for automotive use with an operating temperature range of −40°C to +105°C and AEC-Q100 stress testing alignment. Its 2.18 V reset threshold and 150 ms timeout make it suitable for body control modules, infotainment power supervisors, and ADAS sub-systems requiring robust brownout detection.

How does the reset timeout behavior work on the ADM1816-R22AKS-RL7?

The ADM1816-R22AKS-RL7 asserts RST low when VCC falls below 2.18 V (typ) and maintains the low state for 100–250 ms after VCC rises above the threshold. This fixed delay-centered at 150 ms-is implemented via an internal RC timer and ensures the monitored microprocessor remains held in reset until power stabilizes, preventing premature boot failures.