Analog Devices Inc. ADM8642T100ACBZ-R7

Overview

ADM8642T100ACBZ-R7 from Analog Devices is an ultralow power voltage detector IC designed for precision low-voltage monitoring in battery-constrained systems. It features a factory-trimmed 1.0 V detection threshold (±1.6% over −40°C to +85°C), 92 nA typical quiescent current, open-drain output, and active-low disable input - enabling reliable reset supervision in energy harvesting and portable microprocessor applications.

For engineers reviewing the ADM8642T100ACBZ-R7 datasheet, ADM8642T100ACBZ-R7 pinout, ADM8642T100ACBZ-R7 application, or ADM8642T100ACBZ-R7 equivalent, key selection criteria include its 1.0 V VIN threshold accuracy, 23–35 μs propagation delay, WLCSP-6 package footprint (1.46 mm × 0.96 mm), and ability to monitor voltages as low as 0.5 V with separate VIN sensing.

Technical Context

The ADM8642T100ACBZ-R7 uses a dedicated VIN pin for low-voltage monitoring independent of VCC, allowing accurate detection down to 0.5 V while operating from a higher VCC supply (2 V to 5.5 V). Its internal precision reference and 0.9% × VTH hysteresis ensure stable trip points across temperature.

It integrates glitch immunity on VIN (21–38 μs rejection), on-chip DIS input debouncing, and a 0.6 MΩ internal pull-up on DIS. The open-drain OUT requires external pull-up and asserts low within 23 μs (typ.) when VIN falls below 1.0 V, supporting fail-safe system reset sequencing.

Key Specifications

Pinout & Package

ADM8642T100ACBZ-R7 is housed in a 6-ball, 1.46 mm × 0.96 mm wafer-level chip-scale package (WLCSP) with ball pitch of 0.5 mm. All balls are soldered on the bottom side; ball A1 serves as the orientation indicator.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV803EB10DBZR and MAX6375XR22+T, the ADM8642T100ACBZ-R7 delivers superior energy efficiency (92 nA vs. 350 nA/1.2 μA) and precise 1.0 V detection in a 60% smaller footprint - making it optimal for next-generation batteryless and miniaturized sensing platforms.

Availability

ADM8642T100ACBZ-R7 is available at Aetrix Electronics and suitable for portable energy harvesting nodes, battery-powered wireless sensors, industrial sub-1V rail monitors, and energy meter ASIC power sequencing requiring stable component supply and long-term lifecycle support.

Supply support for ADM8642T100ACBZ-R7 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 ADM8642 series belongs to Analog Devices' ultralow power supervisory IC product line, engineered specifically for battery longevity and precision voltage monitoring in energy-constrained edge devices - including wearables, IoT endpoints, and smart utility meters.

FAQ

What is the exact detection threshold voltage of the ADM8642T100ACBZ-R7, and how accurate is it across temperature?

The ADM8642T100ACBZ-R7 has a factory-trimmed detection threshold of 1.0 V with ±1.6% accuracy over the full −40°C to +85°C operating temperature range. This specification is confirmed in Table 7 of the Rev. D datasheet for threshold number "100", and applies directly to the ADM8642T100ACBZ-R7 part number. No external calibration is needed to achieve this accuracy.

Can the ADM8642T100ACBZ-R7 monitor a 1.0 V rail while being powered from a different supply voltage?

Yes - the ADM8642T100ACBZ-R7 uses separate pins for supply (VCC) and monitoring (VIN), allowing it to supervise a 1.0 V rail (connected to VIN) while operating from a higher VCC supply (2 V to 5.5 V). This architecture is fundamental to the ADM8642 family and explicitly supported for the ADM8642T100ACBZ-R7.

What is the quiescent current of the ADM8642T100ACBZ-R7, and under what conditions is it measured?

The ADM8642T100ACBZ-R7 draws 92 nA typical quiescent current (ICC), measured at TA = 25°C with VCC = 2 V to 5.5 V and the OUT pin pulled high. Maximum ICC is 190 nA across −40°C to +85°C. This ultralow value is specified in Table 1 of the datasheet and applies directly to the ADM8642T100ACBZ-R7.

Does the ADM8642T100ACBZ-R7 have built-in glitch immunity on its VIN input?

Yes - the ADM8642T100ACBZ-R7 includes integrated input glitch rejection on the VIN pin, with 21 μs immunity for falling transients and 38 μs for rising transients (Table 1, "ADM8642 VIN Glitch Rejection"). This prevents false triggering from short-duration supply noise, and is a confirmed feature of the ADM8642T100ACBZ-R7 per the Rev. D datasheet.

What package type and dimensions does the ADM8642T100ACBZ-R7 use?

The ADM8642T100ACBZ-R7 uses a 6-ball wafer-level chip-scale package (WLCSP) designated CB-6-17, measuring 1.46 mm × 0.96 mm with 0.5 mm ball pitch. This is confirmed in the Ordering Guide (page 11) and Outline Dimensions (Figure 22) of the Rev. D datasheet, and applies specifically to the ADM8642T100ACBZ-R7.