Analog Devices Inc. ADM1816-5AKS-REEL7

Overview

ADM1816-5AKS-REEL7 from Analog Devices is a low-power, open-drain microprocessor reset circuit with internal pull-up resistor, designed to monitor 3.06 V (typical) supply rails in embedded systems. It delivers a 150 ms reset timeout after power-up, sinks up to 8 mA, draws only 4–10 µA at 3.6 V, and operates across −40°C to +105°C for industrial-grade reliability in microcontroller-based power management.

For engineers reviewing the ADM1816-5AKS-REEL7 datasheet, ADM1816-5AKS-REEL7 pinout, ADM1816-5AKS-REEL7 application, or ADM1816-5AKS-REEL7 equivalent, this device serves as a precision voltage supervisor for 3.3 V system initialization, offering guaranteed reset assertion during brownout and safe startup timing without external components.

Technical Context

The ADM1816-5AKS-REEL7 implements a bandgap-based voltage reference with comparator hysteresis and a fixed 150 ms reset delay timer. Its open-drain output with integrated 3.5–7.5 kΩ pull-up eliminates need for external resistors while ensuring compatibility with standard logic-level reset inputs requiring active-low assertion.

This variant belongs to the ADM1815–ADM1818 family optimized for lower-voltage monitoring (2.18 V to 3.15 V), distinguishing it from 5 V-focused ADM1810–ADM1813 series. It uses the same SC70-3 package and functional block architecture as ADM1815/ADM1817 but with open-drain output-unlike the push-pull variants.

Key Specifications

Pinout & Package

ADM1816-5AKS-REEL7 is housed in a 3-lead SC70 (KS-3) package, measuring 2.20 mm × 1.35 mm × 0.95 mm with 0.65 mm lead pitch. The package is RoHS-compliant and JEDEC SC70-standard.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX809SEUR+T and TPS3808G30DBVR, ADM1816-5AKS-REEL7 offers tighter threshold accuracy (±2.5% vs ±3.5%), lower operating current (4 µA vs 12 µA or 2.5 µA), and integrated pull-up-reducing component count without sacrificing industrial temperature rating.

Availability

ADM1816-5AKS-REEL7 is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and medical instrumentation requiring stable component supply with full traceability and extended temperature support.

Supply support for ADM1816-5AKS-REEL7 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 since 1965.

The ADM181x series was developed specifically for cost-sensitive, space-constrained microprocessor reset applications-emphasizing low power, guaranteed timing, and simplified integration in embedded control systems.

FAQ

What is the exact reset threshold voltage for ADM1816-5AKS-REEL7?

The ADM1816-5AKS-REEL7 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 factory-trimmed and specified in Table 1 of the Rev. F datasheet, making ADM1816-5AKS-REEL7 suitable for precise supervision of 3.3 V power rails where tight tolerance is required.

Does ADM1816-5AKS-REEL7 require an external pull-up resistor on the RST pin?

No, ADM1816-5AKS-REEL7 integrates an internal pull-up resistor (3.5–7.5 kΩ typical) on its open-drain RST output, eliminating the need for external biasing. This feature simplifies design, reduces BOM count, and ensures consistent rise time across temperature-confirmed in the "INTERNAL PULL-UP RESISTOR" section of the ADM1816-5AKS-REEL7 datasheet.

Can ADM1816-5AKS-REEL7 be used to monitor a 2.5 V supply?

No-ADM1816-5AKS-REEL7 is configured for a 3.06 V threshold and is not rated for reliable operation below 2.98 V. For 2.5 V supervision, select ADM1816-20AKSZ-RL7 (2.55 V typical) or ADM1816-R22AKSZ-R7 (2.18 V typical), both from the same family and SC70 package, ensuring identical timing and drive characteristics as ADM1816-5AKS-REEL7.

What is the maximum sink current capability of the ADM1816-5AKS-REEL7 RST output?

The ADM1816-5AKS-REEL7 RST output can sink up to 8 mA when asserted (low), tested at VCC ≥ 2.7 V and VOUT = 0.4 V. This drives standard CMOS and TTL reset inputs directly without buffering, and exceeds the 1–2 mA requirement of most microcontrollers-verified in the "OUTPUT CURRENT" section of the ADM1816-5AKS-REEL7 datasheet.

Is ADM1816-5AKS-REEL7 compatible with lead-free reflow processes?

Yes-ADM1816-5AKS-REEL7 is RoHS-compliant (denoted by "Z" suffix in ordering guide) and qualified for standard lead-free reflow profiles, including peak temperatures up to 260°C for 10 seconds. Its SC70-3 package meets JEDEC J-STD-020 moisture sensitivity level 1, allowing floor-life unlimited storage when sealed per J-STD-033.