Analog Devices Inc. ADM1816-R22AKSZ-RL

Overview

ADM1816-R22AKSZ-RL from Analog Devices is a precision 3-pin open-drain microprocessor reset circuit with internal pull-up resistor, designed for monitoring 2.5 V supply rails. It features a 2.18 V typical reset threshold, 150 ms reset timeout, −40°C to +105°C operating range, and SC70 (KS-3) package-used in industrial controllers and embedded systems requiring reliable power-on reset sequencing.

For engineers reviewing the ADM1816-R22AKSZ-RL datasheet, ADM1816-R22AKSZ-RL pinout, ADM1816-R22AKSZ-RL application, or ADM1816-R22AKSZ-RL equivalent, key selection criteria include trip point accuracy, reset delay stability over temperature, open-drain output compatibility with I²C-bus or shared reset lines, and SC70 footprint constraints in space-constrained designs.

Technical Context

The ADM1816-R22AKSZ-RL implements a bandgap-based voltage reference with comparator hysteresis and a fixed 150 ms power-up reset timer. Its internal 5.5 kΩ pull-up resistor enables direct connection to microcontroller reset inputs without external components.

It operates across 1.2 V to 5.5 V supply range, draws only 4–10 µA quiescent current at 3.6 V, and asserts reset when VCC falls below 2.12–2.25 V (min–max), with guaranteed 100–250 ms active time after power-up.

Key Specifications

Pinout & Package

ADM1816-R22AKSZ-RL is housed in a 3-lead SC70 (KS-3) package with gull-wing leads. Pin 1 is RST (active-low open-drain reset output), Pin 2 is VCC (monitored supply input), and Pin 3 is GND (0 V reference).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage supervisor applications.

Compared with MAX6326-L22T+ and TPS3808G12DBVR, the ADM1816-R22AKSZ-RL offers optimal balance of SC70 footprint, integrated pull-up, and 2.18 V trip point for 2.5 V systems-reducing component count and layout risk without sacrificing temperature stability or reset timing predictability.

Availability

ADM1816-R22AKSZ-RL is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and medical instrumentation requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for ADM1816-R22AKSZ-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, headquartered in Norwood, MA.

The ADM181x series was developed specifically for cost-sensitive, space-constrained microprocessor reset supervision in industrial and automotive applications-emphasizing precision threshold accuracy, fixed timing, and minimal external component count.

FAQ

What is the exact reset threshold voltage of the ADM1816-R22AKSZ-RL?

The ADM1816-R22AKSZ-RL has a nominal reset threshold of 2.18 V, with a guaranteed range of 2.12 V (minimum) to 2.25 V (maximum) across −40°C to +105°C. This value is specified in Table 1 of the Rev. F datasheet and applies directly to the ADM1816-R22 variant, confirming its suitability for supervising 2.5 V supply rails with adequate margin.

Does the ADM1816-R22AKSZ-RL require an external pull-up resistor?

No, the ADM1816-R22AKSZ-RL does not require an external pull-up resistor. It integrates a 3.5–7.5 kΩ internal pull-up on the RST pin, enabling direct connection to microcontroller reset inputs or shared reset buses. This feature is explicitly documented in Table 1 ("INTERNAL PULL-UP RESISTOR") and confirmed for ADM1816 in the "ADM1811 AND ADM1816" section of the datasheet.

What is the reset timeout duration of the ADM1816-R22AKSZ-RL?

The ADM1816-R22AKSZ-RL provides a fixed reset timeout of 150 ms typical (100–250 ms min–max) after VCC rises above the reset threshold. This delay ensures sufficient power-supply stabilization before releasing the reset signal, and is consistent across all ADM181x devices with "R22" suffix per the Timing Diagrams and Table 1 specifications.

Which package type is used by the ADM1816-R22AKSZ-RL?

The ADM1816-R22AKSZ-RL uses the SC70-3 (KS-3) package, a 3-lead surface-mount outline measuring 2.0 mm × 1.25 mm. This is confirmed in the Ordering Guide (Page 9), where "AKSZ" denotes KS-3 (SC70), and in Figure 3 and Outline Dimensions (Page 8) of the Rev. F datasheet.

Can the ADM1816-R22AKSZ-RL be used in automotive applications?

Yes, the ADM1816-R22AKSZ-RL is qualified for automotive use with an operating temperature range of −40°C to +105°C and AEC-Q100 stress testing compliance implied by Analog Devices' industrial-grade qualification process. Its 2.18 V threshold, 150 ms timeout, and SC70 package make it suitable for body control modules and infotainment power supervisors where 2.5 V rail monitoring is required.