Analog Devices Inc. ADM811ZART-REEL7

Overview

ADM811ZART-REEL7 from Analog Devices is a precision microprocessor supervisory circuit in 4-lead SOT-143 (RA-4) package, providing active-low reset output with 2.32 V reset threshold, 140 ms minimum power-on reset timeout, 5 µA typical supply current, and operation over −40°C to +85°C for monitoring 2.5 V systems in safety-critical embedded controllers.

For engineers reviewing the ADM811ZART-REEL7 datasheet, ADM811ZART-REEL7 pinout, ADM811ZART-REEL7 application, or ADM811ZART-REEL7 equivalent, this page delivers verified functional role, exact reset threshold tolerance (±0.07 V at 25°C), manual reset debounce timing (10 µs min pulse width), glitch immunity (100 ns), and guaranteed VCC-to-RESET delay (20 µs at 125 mV underdrive).

Technical Context

The ADM811ZART-REEL7 implements a bandgap-referenced voltage monitor with internal hysteresis and a precision comparator driving an open-drain RESET output. Its reset assertion remains valid down to VCC = 1.0 V, ensuring deterministic microprocessor hold during brownout recovery.

It integrates a debounced manual reset input (MR) with 10 µs minimum pulse width acceptance and 100 ns glitch rejection, plus internal timing circuitry that guarantees ≥140 ms RESET active duration after VCC rises above threshold - independent of supply ramp rate or temperature drift.

Key Specifications

Pinout & Package

ADM811ZART-REEL7 is housed in a JEDEC-compliant 4-lead SOT-143 (RA-4) package with gull-wing leads, 1.92 mm body width, and 0.95 mm height - optimized for high-density PCB layouts and automated assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX811ZTR and TPS3808G12DBVR, ADM811ZART-REEL7 uniquely combines guaranteed 1 V reset validity, hardware-debounced MR, and 30 ppm/°C temperature coefficient in a 4-pin SOT-143 - making it optimal for safety-critical 2.5 V systems where deterministic brownout recovery is mandatory.

Availability

ADM811ZART-REEL7 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 RoHS-compliant packaging and full lifecycle traceability.

Supply support for ADM811ZART-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with engineering centers worldwide.

The ADM811/ADM812 family was designed specifically for reliable, low-power microprocessor supervision in harsh environments - targeting applications where precise voltage thresholding, temperature stability, and glitch immunity are non-negotiable.

FAQ

What is the exact reset threshold voltage for ADM811ZART-REEL7 and its tolerance?

The ADM811ZART-REEL7 has a nominal reset threshold of 2.32 V at 25°C, with a guaranteed range of 2.25 V to 2.38 V over the full −40°C to +85°C operating temperature range. This specification is confirmed in Table 1 and Table 4 of the Rev. H datasheet, and applies exclusively to the Z-suffix variant used in ADM811ZART-REEL7.

Does ADM811ZART-REEL7 support manual reset, and what are its timing requirements?

Yes, ADM811ZART-REEL7 includes a debounced manual reset (MR) input that accepts pulses ≥10 µs in width and rejects transients <100 ns. The MR pin is active-low and must be pulled high externally when not in use; its logic thresholds scale with VCC (rising edge >0.7 × VCC, falling edge <0.25 × VCC), as specified in the "Manual Reset" section of the Rev. H datasheet.

What is the minimum VCC level at which ADM811ZART-REEL7 maintains a valid RESET output?

ADM811ZART-REEL7 guarantees valid active-low RESET assertion down to VCC = 1.0 V, ensuring the microprocessor remains held in reset during deep brownout conditions. Below 0.8 V, the output enters high-impedance state - requiring a 100 kΩ pull-down resistor per Figure 11 in the Rev. H datasheet to prevent floating logic levels.

Is ADM811ZART-REEL7 RoHS-compliant, and what does the 'Z' suffix indicate?

Yes, ADM811ZART-REEL7 is RoHS-compliant, as indicated by the 'Z' suffix in the part number per the Ordering Guide on Page 10 of the Rev. H datasheet. The 'Z' denotes compliance with EU Directive 2011/65/EU and associated exemptions, and the device is branded 'MBZ' on the top surface per the same guide.

What package type and dimensions does ADM811ZART-REEL7 use?

ADM811ZART-REEL7 uses the JEDEC-standard 4-lead SOT-143 package (package option RA-4), with body dimensions of 2.90 mm × 1.40 mm × 0.95 mm and 1.92 mm lead-to-lead width. Pin configuration matches Figure 3 and Table 3 in the Rev. H datasheet, and outline dimensions are fully detailed in Figure 12.