Texas Instruments AMC22C11DR

Overview

AMC22C11 from Texas Instruments is a fast-response, basic isolated comparator with galvanic isolation barrier, adjustable trip threshold (20mV–2.7V), open-drain output with latch/transparent mode selection, and 240ns typical propagation delay. It operates across high-side supply (3V–27V) and low-side supply (2.7V–5.5V) rails, targeting overcurrent/overvoltage detection in motor drives and solar inverters.

For engineers reviewing the AMC22C11 datasheet, AMC22C11 pinout, AMC22C11 application, or AMC22C11 equivalent, this page delivers verified electrical specs, isolation certification details (4250VPK basic, 3000VRMS UL1577), thermal derating curves, latch-mode timing behavior, and real-world implementation guidance for high-noise industrial power systems.

Technical Context

The AMC22C11 implements a SiO₂-based capacitive isolation barrier with 75V/ns minimum CMTI and certified basic insulation per DIN EN IEC 60747-17 (VDE 0884-17) and UL1577. Its comparator core uses an internal 100μA ±1% reference current to set VREF via external resistor, enabling precise threshold adjustment across two hysteresis modes (low: 20–450mV, high: 600–2700mV).

Output behavior is controlled by the LATCH pin: logic-low enables transparent mode (output follows input state), while logic-high activates latch mode (output latches on over-threshold event until cleared by falling edge). Propagation delay remains stable at 240ns (typ) across –40°C to +125°C with <±1% trip error at 250mV reference.

Key Specifications

Pinout & Package

AMC22C11 is housed in an 8-pin SOIC (D package), 4.9mm × 6mm footprint, with creepage/clearance ≥4mm and DTI ≥15.4µm for reinforced basic isolation compliance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AMC22C11, AMC1301QDWVRQ1 offers higher isolation and speed but removes user-adjustable hysteresis and latch control, while ISO224BDWVR provides analog output instead of digital decision-making-making both unsuitable as drop-in replacements for fast, configurable overcurrent latching in industrial inverters.

Availability

AMC22C11 is available at Aetrix Electronics and suitable for motor drives, solar inverters, and frequency inverters requiring stable component supply with guaranteed long-term manufacturability and full traceability.

Supply support for AMC22C11 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 precision signal chain solutions.

The AMC22C11 belongs to TI's isolated comparator product line, designed specifically for high-reliability overcurrent and overvoltage protection in industrial power conversion systems operating under harsh EMI and wide temperature conditions.

FAQ

What is the maximum working voltage supported by the AMC22C11 isolation barrier?

The AMC22C11 supports a maximum rated isolation working voltage (VIOWM) of 560VRMS at AC sine wave and 790VDC, validated per DIN EN IEC 60747-17 and UL1577 standards. This enables safe operation in 400VAC motor drive and 1000VDC solar inverter applications where continuous working voltage exceeds 500VRMS.

How does the AMC22C11 implement adjustable hysteresis without external components?

The AMC22C11 automatically selects hysteresis mode based on the REF pin voltage: below 500mV it defaults to low-hysteresis (4mV), and above 600mV it switches to high-hysteresis (25mV). This dual-mode behavior is internally controlled by a dedicated threshold detector and requires no external hysteresis resistors - simplifying PCB layout while maintaining noise immunity across the full 20mV–2.7V adjustment range.

Can the AMC22C11 operate with different supply voltages on each side simultaneously?

Yes, the AMC22C11 is explicitly designed for asymmetric dual-supply operation: VDD1 supports 3V–27V (high-side), and VDD2 supports 2.7V–5.5V (low-side). This allows direct interfacing with 24V industrial sensors on the input side and 3.3V microcontrollers on the output side without level-shifting circuitry, preserving signal integrity and minimizing component count.

What is the purpose of the deglitch timing on the LATCH pin and REF pin?

The AMC22C11 applies 3.2µs deglitch filtering on the LATCH pin and 10µs deglitch on the REF pin to suppress noise-induced false triggering during power-up or EMI events. This ensures that latch mode activation and hysteresis mode selection occur only after stable logic levels are established - critical for reliable fault capture in electrically noisy motor drive environments.

Does the AMC22C11 require external passive components for basic operation?

Yes - a single external resistor from REF to GND1 sets the trip threshold, and a recommended 20–100nF capacitor from REF to GND1 filters reference noise. An external pull-up resistor on OUT is also required for open-drain operation. No additional components are needed for isolation, latch control, or hysteresis selection - all functions are integrated into the AMC22C11 die.