Overview
The AMC1211-Q1, produced by Texas Instruments, is a precision, isolated amplifier designed for high-accuracy voltage sensing and control in various applications. This device features a capacitive isolation barrier that provides basic galvanic isolation of up to 3 kV RMS, adhering to DIN EN IEC 60747-17 (VDE 0884-17) and UL1577 standards. It supports working voltages up to 1000 V RMS, making it suitable for systems operating at different common-mode voltage levels. The AMC1211-Q1 is optimized for connection to high-impedance resistive dividers or other high-impedance voltage signal sources, ensuring excellent DC accuracy and low temperature drift. It is AEC-Q100 qualified for automotive applications and operates within a temperature range of –40°C to +125°C.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Offset Voltage (VOS) | -1.5 | ±0.4 | 1.5 | mV |
| Input Offset Thermal Drift (TCVOS) | -10 | ±3 | 10 | μV/°C |
| Output Common-Mode Voltage (VCMout) | 1.39 | 1.44 | 1.49 | V |
| Clipping Differential Output Voltage (VCLIPout) | 2.49 | V | ||
| Output Bandwidth (BW) | 220 | 275 | kHz | |
| Output Resistance (ROUT) | <0.2 | Ω | ||
| Common-Mode Transient Immunity (CMTI) | 30 | 45 | kV/μs | |
| High-Side Supply Voltage (VDD1) | -0.3 | 6.5 | V | |
| Low-Side Supply Voltage (VDD2) | -0.3 | 6.5 | V | |
| Operating Temperature Range | -40 | 125 | °C | |
| Package Type | Wide-body 8-pin SOIC |
Key Features
- High-Impedance Input: Optimized for connection to high-impedance resistive dividers or other high-impedance voltage signal sources.
- Precision and Accuracy: Excellent DC accuracy and low temperature drift for accurate, isolated voltage sensing and control in closed-loop systems.
- Isolation Barrier: Capacitive isolation barrier providing basic galvanic isolation of up to 3 kV RMS and working voltage up to 1000 V RMS.
- Integrated Diagnostics: Missing high-side supply voltage detection feature simplifies system-level design and diagnostics.
- AEC-Q100 Qualified: Suitable for automotive applications with a temperature range from –40°C to +125°C.
- Low Power Consumption: Maximum power dissipation of 98 mW (both sides) at VDD1 = VDD2 = 5.5 V.
- High Common-Mode Transient Immunity: Up to 45 kV/μs.
Applications
- Traction Inverters: Used in electric vehicle and hybrid electric vehicle systems for precise voltage sensing.
- Onboard Chargers: Essential for accurate voltage monitoring in onboard charging systems of electric vehicles.
- DC/DC Converters: Utilized in various power conversion applications requiring isolated voltage sensing.
- Automotive Systems: AEC-Q100 qualified, making it suitable for a wide range of automotive applications.
Q & A
- What is the primary function of the AMC1211-Q1?
The AMC1211-Q1 is a precision, isolated amplifier designed for high-accuracy voltage sensing and control.
- What is the isolation rating of the AMC1211-Q1?
The AMC1211-Q1 provides basic galvanic isolation of up to 3 kV RMS and supports working voltages up to 1000 V RMS.
- What is the operating temperature range of the AMC1211-Q1?
The device operates within a temperature range of –40°C to +125°C.
- What package type is the AMC1211-Q1 available in?
The AMC1211-Q1 is available in a wide-body 8-pin SOIC package.
- Is the AMC1211-Q1 suitable for automotive applications?
Yes, the AMC1211-Q1 is AEC-Q100 qualified for automotive applications.
- What is the typical output bandwidth of the AMC1211-Q1?
The typical output bandwidth is 275 kHz.
- What is the common-mode transient immunity of the AMC1211-Q1?
The common-mode transient immunity is up to 45 kV/μs.
- Does the AMC1211-Q1 have any integrated diagnostic features?
Yes, it includes a missing high-side supply voltage detection feature.
- What are some typical applications of the AMC1211-Q1?
Traction inverters, onboard chargers, DC/DC converters, and various automotive systems.
- What is the maximum power dissipation of the AMC1211-Q1?
The maximum power dissipation is 98 mW (both sides) at VDD1 = VDD2 = 5.5 V.
