Texas Instruments AMC23C12DWVR

Overview

AMC23C12 from Texas Instruments is a reinforced isolated window comparator IC designed for high-speed overcurrent and overvoltage detection in high-side sensing applications. It features adjustable ±20mV to ±300mV trip thresholds, 280ns typical propagation delay, 55V/ns minimum CMTI, and operates across –40°C to +125°C with dual supply rails (3–27V high-side, 2.7–5.5V low-side). It is used in motor drives and solar inverters for fast fault isolation.

For engineers reviewing the AMC23C12 datasheet, AMC23C12 pinout, AMC23C12 application, or AMC23C12 equivalent, this page delivers verified specifications, functional context, package details, real-world use cases, and validated alternative options - all grounded in TI's production-grade documentation for safety-critical power monitoring designs.

Technical Context

The AMC23C12 implements a dual-comparator architecture (Cmp0 and Cmp1) separated by a reinforced galvanic isolation barrier certified to 7000VPK (DIN EN IEC 60747-17) and 5000VRMS (UL1577), supporting up to 1kVRMS working voltage. Its window-comparator mode triggers when |VIN| exceeds VREF, while positive-comparator mode (enabled above 550mV on REF) disables Cmp1 for unidirectional voltage monitoring.

Threshold adjustment uses a precise 100μA ±1% internal current source referenced to the REF pin; external resistor selection sets trip level, and optional capacitor filtering improves noise immunity. The open-drain OUT supports transparent mode (LATCH = GND2) or latch mode (LATCH = VDD2), with deglitching on mode transitions and start-up blanking (200µs high-side blanking time).

Key Specifications

Pinout & Package

AMC23C12 is housed in an 8-pin wide-body SOIC (DWV) package measuring 5.85mm × 11.5mm, optimized for creepage/clearance ≥8.5mm and reinforced insulation integrity per safety standards.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar isolated comparator applications.

Compared with AMC1301QDWVRQ1 and ISO224BDWVR, the AMC23C12 uniquely integrates reinforced isolation, adjustable window comparison, and latch-mode output in a single 8-pin SOIC-reducing component count, eliminating external logic, and guaranteeing deterministic <1µs fault response without MCU involvement.

Availability

AMC23C12 is available at Aetrix Electronics and suitable for motor drives, solar inverters, and frequency inverters requiring stable component supply, long-term lifecycle support, and compliance with reinforced isolation safety standards.

Supply support for AMC23C12 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

Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of expertise in isolation, power management, and industrial signal chain solutions.

The AMC23C12 belongs to TI's reinforced isolated comparator product line, engineered specifically for high-reliability overcurrent and overvoltage protection in high-voltage power conversion systems operating up to 125°C ambient.

FAQ

What is the maximum adjustable trip threshold range for AMC23C12 in window-comparator mode?

The AMC23C12 supports an adjustable window-comparator threshold range of ±20mV to ±300mV, set by a single external resistor connected to the REF pin. This range is achieved using the device's internal 100μA ±1% reference current source, enabling precise, temperature-stable current-sense thresholding without external calibration. The AMC23C12 maintains ±1% trip threshold error at 250mV across its full operating temperature range.

How does the LATCH pin affect AMC23C12 output behavior?

When the LATCH pin is pulled high (to VDD2), the AMC23C12 enters latch mode: the OUT pin goes low on fault detection and remains latched low until the LATCH pin is cycled low then high again. When LATCH is tied to GND2, the device operates in transparent mode, where OUT directly mirrors the comparator state. The AMC23C12 datasheet specifies deglitch times (1.8–3.2µs) to prevent spurious toggling during mode transitions.

Does AMC23C12 require external components to set its trip threshold?

Yes - the AMC23C12 requires a single external resistor from REF to GND1 to set the trip threshold. The internal 100μA ±1% current source flows through this resistor to generate VREF, which defines the window (±VREF) or positive threshold (VREF). A capacitor (20–100nF) is also recommended from REF to GND1 for noise filtering. No external reference voltage, op-amp, or comparator is needed - the AMC23C12 integrates all functions required for isolated window comparison.

What safety certifications apply to AMC23C12?

The AMC23C12 is certified to DIN EN IEC 60747-17 (VDE 0884-17) for 7000VPK reinforced isolation and UL1577 for 5000VRMS isolation for 1 minute. It also complies with EN IEC 62368-1 and carries UL Recognition (File E181974) and VDE Certificate 40040142. These certifications validate its suitability for end-equipment requiring reinforced insulation in industrial and automotive applications.

Can AMC23C12 operate with different supply voltages on its high-side and low-side domains?

Yes - the AMC23C12 is explicitly designed for asymmetric dual-supply operation: VDD1 accepts 3V to 27V (high-side), while VDD2 accepts 2.7V to 5.5V (low-side). This allows direct interfacing with high-voltage power stages and standard 3.3V/5V microcontrollers without level shifters. Undervoltage lockout thresholds (2.9V for VDD1, 2.1V for VDD2) ensure robust startup and brownout protection on both sides.