Analog Devices Inc. ADM1816-5AKSZ-REEL

Overview

ADM1816-5AKSZ-REEL from Analog Devices is a 3.06 V typical precision voltage supervisor IC with open-drain reset output and internal 5.5 kΩ pull-up resistor, designed for reliable power-on reset in 3.3 V microprocessor systems. It features 150 ms reset timeout, −40°C to +105°C operating range, and SC70-3 package. Used in industrial controllers to ensure safe boot after power stabilization.

For engineers reviewing the ADM1816-5AKSZ-REEL datasheet, ADM1816-5AKSZ-REEL pinout, ADM1816-5AKSZ-REEL application, or ADM1816-5AKSZ-REEL equivalent, key selection criteria include trip point accuracy (±1.5% typical), low quiescent current (9–16 µA), open-drain compatibility with I²C-bus logic levels, and guaranteed reset assertion during brownout conditions below 2.98 V.

Technical Context

The ADM1816-5AKSZ-REEL implements a bandgap-based voltage reference with comparator hysteresis and a fixed 150 ms monostable delay circuit. Its internal pull-up resistor eliminates external components required for active-low reset signaling to microcontrollers with open-drain-compatible reset inputs.

This device belongs to the ADM181x family of single-supply voltage monitors optimized for space-constrained embedded applications. Unlike push-pull variants (e.g., ADM1815), it uses an open-drain RST output that sinks up to 8 mA while asserting reset, enabling wired-OR configurations and flexible logic-level translation.

Key Specifications

Pinout & Package

ADM1816-5AKSZ-REEL is housed in a 3-lead SC70 (KS-3) surface-mount package with gull-wing leads and 0.65 mm pitch. The package measures 2.00 mm × 2.10 mm × 0.95 mm (L × W × H) and complies with EIAJ SC70 standards.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX6326UT31D3+ and TPS3808G33DBVR, the ADM1816-5AKSZ-REEL offers tighter trip accuracy (±1.5% vs ±2.5%), integrated pull-up for simplified design, and optimal 3.06 V threshold for 3.3 V rail margining-making it ideal for industrial microcontroller reset where precision and component count matter.

Availability

ADM1816-5AKSZ-REEL is available at Aetrix Electronics and suitable for industrial PLC controllers, automotive body control modules, medical patient monitors, and smart energy meters requiring stable component supply with full RoHS compliance and traceable lot documentation.

Supply support for ADM1816-5AKSZ-REEL 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, headquartered in Norwood, MA.

The ADM181x product line delivers cost-effective, space-efficient voltage supervisors targeting microprocessor reset in industrial, automotive, and instrumentation applications-designed specifically for reliability under harsh thermal and electrical conditions.

FAQ

What is the exact reset threshold voltage for ADM1816-5AKSZ-REEL?

The ADM1816-5AKSZ-REEL has a nominal reset threshold of 3.06 V, with a guaranteed range of 2.98 V (min) to 3.15 V (max) over −40°C to +105°C. This value is specified in Table 1 of the Rev. F datasheet and applies specifically to the -5 variant, confirming its suitability for monitoring 3.3 V supplies with adequate headroom.

Does ADM1816-5AKSZ-REEL require an external pull-up resistor on the RST pin?

No, ADM1816-5AKSZ-REEL includes an internal 5.5 kΩ pull-up resistor on the RST pin, as confirmed in Table 1 ("INTERNAL PULL-UP RESISTOR" section). This eliminates the need for external components when interfacing with standard CMOS or TTL reset inputs, reducing bill-of-materials and PCB area.

Can ADM1816-5AKSZ-REEL be used to monitor a 5 V supply?

No-ADM1816-5AKSZ-REEL is configured for 3.06 V threshold and is intended for 3.3 V supply monitoring. For 5 V applications, Analog Devices specifies the ADM1811-5AKSZ-REEL (4.62 V trip) or ADM1810-5AKSZ-REEL. Using ADM1816-5AKSZ-REEL on 5 V would result in continuous reset assertion.

What is the reset timeout duration of ADM1816-5AKSZ-REEL and how is it implemented?

The ADM1816-5AKSZ-REEL provides a fixed 150 ms reset timeout (100–250 ms min/max), measured from VCC crossing the threshold until RST deasserts. This is achieved via an internal monostable circuit-not software-configurable-and ensures consistent power-up timing across temperature and voltage variations.

Is ADM1816-5AKSZ-REEL pin-compatible with other ADM181x SC70 variants?

Yes-ADM1816-5AKSZ-REEL shares identical SC70-3 pinout (VCC, GND, RST) and footprint with all ADM181x SC70 variants (e.g., ADM1811, ADM1813, ADM1815), as shown in Figure 3 and Table 3 of the datasheet. However, trip point, output polarity, and internal pull-up presence differ; electrical compatibility must be verified per application.