Texas Instruments AMC23C11DWVR

Overview

AMC23C11DWVR from Texas Instruments is a reinforced isolated comparator with 240ns typical propagation delay, adjustable 20mV–2.7V trip threshold via external resistor, and open-drain output supporting transparent or latch mode. It operates across independent high-side (3V–27V) and low-side (2.7V–5.5V) supplies and delivers ±1% trip threshold error at 250mV in motor drive overcurrent detection.

For engineers reviewing the AMC23C11DWVR datasheet, AMC23C11DWVR pinout, AMC23C11DWVR application, or AMC23C11DWVR equivalent, key selection criteria include its 75V/ns CMTI, VDE 0884-17/UL1577 reinforced isolation certification, latch-mode fault retention capability, and SOIC-8 wide-body package for high-voltage system monitoring.

Technical Context

The AMC23C11DWVR implements a SiO₂-based capacitive reinforced isolation barrier between input and output sides, enabling galvanic separation up to 5000VRMS and 7000VPK. Its comparator core uses an internally generated 100μA ±1% reference current to set trip thresholds through a single external resistor on the REF pin.

Two hysteresis modes are supported: low-hysteresis (20mV–450mV, 4mV hysteresis) and high-hysteresis (600mV–2.7V, 25mV hysteresis), selected automatically based on REF voltage crossing 500–600mV. The LATCH pin controls output behavior-low enables transparent mode; high enables latch mode with reset on falling edge.

Key Specifications

Pinout & Package

AMC23C11DWVR is housed in an 8-pin wide-body SOIC (DWV) package measuring 5.85mm × 11.5mm, optimized for creepage and clearance ≥8.5mm per reinforced isolation 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 AMC23C11DWVR uniquely combines sub-250ns propagation delay, user-adjustable threshold with automatic hysteresis selection, and hardware latch functionality-all within a reinforced-isolation SOIC-8 package-making it optimal for safety-critical overcurrent protection where deterministic timing and fault retention are mandatory.

Availability

AMC23C11DWVR 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 industrial safety certifications.

Supply support for AMC23C11DWVR 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 delivering analog and embedded processing solutions, with deep expertise in isolation technology and industrial-grade reliability.

The AMC23C11DWVR belongs to TI's reinforced isolated comparator product line, designed specifically for high-speed, high-accuracy fault detection in demanding power electronics applications such as traction inverters and grid-tied energy systems.

FAQ

What is the maximum working voltage supported by the AMC23C11DWVR isolation barrier?

The AMC23C11DWVR supports a maximum rated isolation working voltage (VIOWM) of 1000VRMS at AC sine wave and 1410VDC, validated per DIN EN IEC 60747-17 (VDE 0884-17) and UL1577. Its reinforced insulation structure is rated for continuous operation at up to 1kVRMS, making it suitable for use in 690VAC industrial motor drives and 1000VDC solar DC links. The device's 8.5mm creepage and clearance further ensure robustness under pollution degree 2 conditions.

How does the AMC23C11DWVR implement adjustable threshold without external voltage references?

The AMC23C11DWVR integrates a precision 100μA ±1% current source connected to the REF pin. By connecting an external resistor from REF to GND1, users generate a voltage drop (V = I × R) that directly sets the trip threshold. For example, a 2.5kΩ resistor yields 250mV, while a 27kΩ resistor yields 2.7V. This eliminates dependency on external voltage references or op-amps, reducing BOM count and layout complexity while maintaining ±1% accuracy at nominal conditions.

Can the AMC23C11DWVR operate with different supply voltages on each side?

Yes - the AMC23C11DWVR is explicitly designed for asymmetric dual-supply operation: VDD1 accepts 3V–27V for the high-side analog input domain, while VDD2 accepts 2.7V–5.5V for the low-side digital output domain. This decoupling allows direct interfacing with 24V industrial sensors on the input side and 3.3V or 5V microcontrollers on the output side, without level shifters. Undervoltage lockout is independently implemented on both rails (VDD1 UV = 3V, VDD2 UV = 2.7V).

What is the functional difference between transparent mode and latch mode in the AMC23C11DWVR?

In transparent mode (LATCH = low), the AMC23C11DWVR output follows the comparator state in real time: OUT goes low when IN exceeds VIT+, and returns high when IN falls below VIT–. In latch mode (LATCH = high), the output goes low on trip but remains latched low until the LATCH pin transitions from high to low - providing persistent fault indication even after the overcurrent condition clears. This enables reliable interrupt handling in firmware without missing transient events.

Does the AMC23C11DWVR require external filtering on the REF pin?

Yes - the datasheet recommends placing a capacitor (20–100nF) from REF to GND1 to filter noise and improve transient immunity. Because the REF pin hosts both the 100μA reference current and serves as the hysteresis selection node, unfiltered noise can cause unintended mode switching or threshold instability. TI specifies that the capacitor must be placed as close as possible to the REF pin to minimize parasitic inductance, especially in high-dV/dt environments like IGBT switching nodes.