My Inquiry
My Account
Texas Instruments AMC22C12DR
- Part No.:
- AMC22C12DR
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AMC22C12DR.pdf
- Description:
- IC COMPARATOR 1 WINDW 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,418
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AMC22C12 from Texas Instruments is a basic isolated window comparator IC with galvanic isolation barrier, designed for fast overvoltage/overcurrent fault detection in high-side power domains. It features adjustable ±20mV to ±300mV trip thresholds, 280ns typical propagation delay, and operates across –40°C to +125°C with 3V–27V high-side and 2.7V–5.5V low-side supplies.
For engineers reviewing the AMC22C12 datasheet, AMC22C12 pinout, AMC22C12 application, or AMC22C12 equivalent, this page delivers verified technical context, real-world use cases in motor drives and solar inverters, confirmed pin functions, and two validated alternative parts - all grounded in TI's SBASAJ8B production data sheet (Dec 2024 revision).
Technical Context
The AMC22C12 implements dual comparators (Cmp0 and Cmp1) across an isolation barrier certified to 4250VPK basic isolation (DIN EN IEC 60747-17) and 3000VRMS (UL1577), supporting up to 560VRMS working voltage. Its window-comparator mode centers trip thresholds around 0V, triggering when |VIN| exceeds VREF ± VHYS.
Threshold adjustment is achieved via a precision 100μA (±1%) internal current source at the REF pin, enabling resistor-set thresholds from ±20mV to ±300mV (window mode) or 600mV–2.7V (positive-only mode). The open-drain OUT supports transparent mode (LATCH = GND2) or latch mode (LATCH = VDD2), with deglitching on mode transitions and start-up blanking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 4250VPK basic isolation per VDE 0884-17; 3000VRMS per UL1577 - enables safe monitoring of high-voltage rails without ground-loop risk. |
| Propagation Delay | 280ns typical - supports sub-microsecond fault response in fast-switching systems like SiC/GaN inverters. |
| Adjustable Threshold Range | ±20mV to ±300mV (window mode); 600mV to 2.7V (positive mode) - allows precise shunt-based current sensing or supply rail monitoring. |
| Reference Current Accuracy | 100μA ±1% - ensures predictable threshold setting with external resistor, minimizing calibration overhead. |
| Common-Mode Transient Immunity | 55V/ns minimum - maintains reliable operation during high-dV/dt switching events in motor drives and converters. |
| Operating Temperature | –40°C to +125°C - fully specified for extended industrial environments including under-hood automotive and industrial power modules. |
| Supply Voltage Ranges | VDD1: 3V–27V (high-side); VDD2: 2.7V–5.5V (low-side) - supports wide-input DC/DC converters and MCU-compatible logic side. |
Pinout & Package
The AMC22C12 is housed in an 8-pin SOIC (D package), 4.9mm × 6mm footprint, with reinforced creepage and clearance ≥4mm for reinforced isolation compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | High-side power supply | Accepts 3V–27V input to power the isolated input-side comparators and reference circuitry. |
| IN | Analog input | Differential input referenced to GND1; accepts –400mV to 4V for bidirectional current/voltage monitoring. |
| REF | Reference input | Sinks 100μA ±1% current; resistor-to-GND1 sets trip threshold; voltage >550mV disables negative comparator. |
| GND1 | High-side ground | Return path for input-side circuitry; galvanically isolated from GND2 by reinforced barrier. |
| VDD2 | Low-side power supply | Supplies 2.7V–5.5V to output-side logic and latch control; decoupling required per TI layout guidelines. |
| LATCH | Digital mode select | High = latch mode (output holds fault state until reset); low = transparent mode (output follows input state). |
| GND2 | Low-side ground | Return for output-side circuitry; connects to MCU/system logic ground; isolated from GND1. |
| OUT | Open-drain digital output | Active-low fault signal; requires external pull-up; sinks up to 4mA; supports wired-OR fault bus architectures. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable window-comparator architecture | Enables single-resistor threshold tuning from ±20mV to ±300mV - eliminates need for matched external resistors or DACs. |
| Configurable latch/transparent output mode | LATCH pin selects between self-clearing (transparent) or latched fault reporting - simplifies system-level fault handling logic. |
| High CMTI (55V/ns min) | Ensures robust operation during rapid common-mode transients in SiC/GaN half-bridges without false triggering. |
| Integrated 100μA ±1% reference current source | Removes dependency on external current sources or precision references - reduces BOM count and layout sensitivity. |
| –40°C to +125°C full-spec operation | Validated performance across automotive under-hood and industrial ambient extremes without derating. |
Applications
| Motor Drive Overcurrent Protection | Solar Inverter DC Link Monitoring |
|---|---|
|
Use Scenario: Real-time shunt-based current sensing in IGBT/SiC half-bridge legs to detect short-circuit faults before device destruction. IC Role / Device Role / Timing Role: Isolated window comparator monitors differential voltage across shunt resistor; triggers within 280ns when |VIN| exceeds ±100mV threshold. Use Value: Enables <1µs fault response time while maintaining galvanic separation between high-voltage power stage and low-voltage controller. |
Use Scenario: Continuous monitoring of photovoltaic string voltage against upper/lower limits to prevent overvoltage damage or islanding risks. IC Role / Device Role / Timing Role: Window comparator detects if DC link voltage deviates beyond ±250mV from nominal, signaling controller to initiate shutdown or bypass. Use Value: Eliminates need for separate high-side ADC and isolator, reducing cost and latency in safety-critical PV protection loops. |
| Frequency Inverter Phase Loss Detection | DC/DC Converter Output OVP/UVP |
|
Use Scenario: Detecting asymmetry in three-phase motor currents indicating phase loss or winding imbalance in variable-frequency drives. IC Role / Device Role / Timing Role: Compares each phase current against a common reference; latched output flags sustained deviation exceeding ±50mV window. Use Value: Provides deterministic, isolated fault flag independent of MCU sampling rate - critical for Class 1 functional safety compliance. |
Use Scenario: Monitoring regulated output voltage of isolated DC/DC converters for overvoltage (OVP) and undervoltage (UVP) conditions. IC Role / Device Role / Timing Role: Positive-comparator mode (REF >550mV) sets 2.4V OVP and 2.1V UVP thresholds using single resistor divider. Use Value: Delivers fail-safe protection with <300ns response - faster than most microcontroller-based monitoring, preventing downstream load damage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AMC1301QDWVRQ1 | Reinforced isolation (7000VPK), integrated sigma-delta modulator, requires external digital filter; no adjustable analog threshold. | Targeted at high-resolution current sensing with MCU-based filtering; not suitable for direct analog threshold comparison. | Select when high-accuracy current measurement (not simple fault detection) is required and digital processing resources are available. |
| ISO224BDWVR | Reinforced isolation (5000VPK), precision isolated amplifier (gain = 8.2), fixed gain architecture; no comparator or latch function. | Used for isolated analog signal conditioning prior to external comparator; adds complexity and latency vs integrated solution. | Choose when linear isolation of sensor signals is needed, and threshold comparison is handled separately in FPGA or ASIC. |
Compared with AMC22C12, AMC1301QDWVRQ1 offers higher isolation but requires digital post-processing and lacks direct threshold control, while ISO224BDWVR provides analog amplification but no built-in decision logic - making AMC22C12 uniquely suited for low-latency, resistor-programmable fault detection without external components.
Availability
AMC22C12 is available at Aetrix Electronics and suitable for motor drives, solar inverters, and frequency inverters requiring stable component supply, long-term lifecycle support, and guaranteed traceability for industrial and automotive programs.
Supply support for AMC22C12 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, embedded processing, and high-reliability power solutions for industrial, automotive, and enterprise applications.
The AMC22C12 belongs to TI's isolated analog sensing portfolio, engineered specifically for fast, accurate, and robust fault detection in high-voltage power conversion systems where galvanic isolation and nanosecond response are mandatory.
FAQ
What is the maximum working voltage supported by the AMC22C12 isolation barrier?
The AMC22C12 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 when properly implemented per TI layout guidelines.
How does the AMC22C12 switch between window-comparator and positive-comparator modes?
The AMC22C12 switches modes based on the voltage applied to the REF pin: below 500mV enables full window-comparator operation (±VREF); above 550mV disables the negative comparator (Cmp1), leaving only the positive comparator (Cmp0) active with thresholds from 600mV to 2.7V. Hysteresis is automatically adjusted to 4mV or 25mV depending on mode.
What is the purpose of the LATCH pin on the AMC22C12?
The LATCH pin configures the behavior of the open-drain OUT signal: when pulled high to VDD2, it enables latch mode - the output remains asserted after fault detection until cleared by a falling edge on LATCH; when tied to GND2, it enables transparent mode - the output tracks the instantaneous comparator state. Floating the pin is prohibited.
Can the AMC22C12 be used with a 24V high-side supply and 3.3V MCU logic side?
Yes - the AMC22C12 explicitly supports VDD1 from 3V to 27V and VDD2 from 2.7V to 5.5V, making it compatible with 24V high-side power domains and 3.3V microcontrollers. Its 2.7V low-side minimum ensures reliable operation with modern ultra-low-voltage MCUs and level-shifting is unnecessary due to the isolated open-drain output.
What is the accuracy of the trip threshold at 250mV reference setting?
At a 250mV reference setting, the AMC22C12 guarantees a maximum trip threshold error of ±1% (±2.5mV) across temperature and supply variations, as specified in the Electrical Characteristics table. This accuracy is maintained over the full –40°C to +125°C range with typical error under ±1.5mV at 25°C.
AMC22C12DR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Window
- Number of Elements:
- 1
- Output Type:
- Open-Drain
- Voltage - Supply, Single/Dual (±):
- 3V ~ 27V
- :
- -
- Voltage - Input Offset (Max):
- 0.025µA @ 4V
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 2.2mA, 4.3mA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- 410ns
- Propagation Delay (Max):
- 25mV
- Hysteresis:
- -40°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
AMC22C12DR FAQ
1.How can I place an order for AMC22C12DR through Aetrix?
Please submit a Request for Quotation (RFQ) for AMC22C12DR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AMC22C12DR reliable?
The price and inventory of AMC22C12DR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AMC22C12DR is usually 5 days.
3.What payment methods are accepted for AMC22C12DR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AMC22C12DR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AMC22C12DR?
AMC22C12DR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AMC22C12DR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AMC22C12DR?
For technical support, including AMC22C12DR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AMC22C12DR requirements.
6.How does Aetrix verify that AMC22C12DR is sourced from the original manufacturer or authorized distributors?
All AMC22C12DR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AMC22C12DR meets industry standards.
7.What is the process for return or replacement of AMC22C12DR?
All AMC22C12DR units undergo pre-shipment inspection (PSI). If there is an issue with AMC22C12DR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AMC22C12DR part is unused and in its original packaging.
Return procedure for AMC22C12DR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AMC22C12DR Tags
-
LM2903DR
Texas Instruments
-
LM339DR
Texas Instruments
-
LM339PWR
Texas Instruments
-
LM393DT
STMicroelectronics
-
LM2901PWR
Texas Instruments
-
LM2903DT
STMicroelectronics
-
LM393DR
Texas Instruments
-
LM239DR
Texas Instruments
-
LM339APWR
Texas Instruments
-
LM2903P
Texas Instruments
-
LM393ADR
Texas Instruments
-
NCX2200GMAZ
NXP Semiconductors
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
