Overview
The AMC1311-Q1, produced by Texas Instruments, is a precision, isolated amplifier designed for automotive applications. This device features a capacitive isolation barrier that provides reinforced galvanic isolation, making it highly resistant to magnetic interference. It is certified to offer up to 5 kV RMS isolation according to DIN EN IEC 60747-17 (VDE 0884-17) and UL1577, and supports working voltages up to 1500 V RMS. The AMC1311-Q1 is optimized for isolated voltage measurement with a high-impedance input and is available in two performance grade options: AMC1311-Q1 and AMC1311B-Q1.
Key Specifications
| Parameter | Test Conditions | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|---|
| Input Offset Voltage (VOS) | TA = 25°C, 4.5 V ≤ VDD1 ≤ 5.5 V | -9.9 | ±0.4 | 9.9 | mV (AMC1311-Q1) |
| Input Offset Voltage (VOS) | TA = 25°C, 3.0 V ≤ VDD1 ≤ 5.5 V | -1.5 | ±0.4 | 1.5 | mV (AMC1311B-Q1) |
| Input Offset Thermal Drift (TCVOS) | TA = 25°C | -20 | - | 20 | µV/°C (AMC1311-Q1) |
| Input Offset Thermal Drift (TCVOS) | TA = 25°C | -10 | - | 10 | µV/°C (AMC1311B-Q1) |
| Gain Error (EG) | TA = 25°C | -1% | 0.4% | 1% | % (AMC1311-Q1) |
| Gain Error (EG) | TA = 25°C | -0.2% | ±0.05% | 0.2% | % (AMC1311B-Q1) |
| Gain Error Drift (TCEG) | TA = 25°C | -30 | - | 30 | ppm/°C (AMC1311-Q1) |
| Gain Error Drift (TCEG) | TA = 25°C | -40 | - | 40 | ppm/°C (AMC1311B-Q1) |
| Common-Mode Transient Immunity (CMTI) | - | 15 | 30 | 30 | kV/µs (AMC1311-Q1) |
| Common-Mode Transient Immunity (CMTI) | - | 100 | 150 | 150 | kV/µs (AMC1311B-Q1) |
| Operating Temperature Range | - | -40°C | - | 125°C | °C (AMC1311-Q1) |
| Operating Temperature Range | - | -55°C | - | 125°C | °C (AMC1311B-Q1) |
Key Features
- High-Impedance Input: Optimized for connection to high-impedance resistive dividers or any other high-impedance voltage signal source.
- Reinforced Galvanic Isolation: Certified to provide up to 5 kV RMS isolation according to DIN EN IEC 60747-17 (VDE 0884-17) and UL1577.
- Low DC Errors: Low offset error and gain error with minimal drift over temperature.
- Fixed Gain: Fixed gain of 1 for simplicity in system design.
- Missing High-Side Supply Voltage Detection: Integrated feature for system-level design and diagnostics.
- AEC-Q100 Qualified: Qualified for automotive applications with a temperature grade of -40°C to +125°C.
- Functional Safety-Capable: Documentation available to aid in functional safety system design.
- High Common-Mode Transient Immunity (CMTI): Up to 150 kV/µs for the AMC1311B-Q1.
Applications
- Isolated Voltage Sensing: In traction inverters, onboard chargers, and DC/DC converters.
- Automotive Systems: Suitable for various automotive applications requiring isolated voltage measurement and control.
Q & A
- What is the primary function of the AMC1311-Q1?
The AMC1311-Q1 is a precision, isolated amplifier designed for isolated voltage measurement and control in automotive applications.
- What level of galvanic isolation does the AMC1311-Q1 provide?
The AMC1311-Q1 provides reinforced galvanic isolation of up to 5 kV RMS according to DIN EN IEC 60747-17 (VDE 0884-17) and UL1577.
- What are the key features of the high-impedance input of the AMC1311-Q1?
The high-impedance input is optimized for connection to high-impedance resistive dividers or any other high-impedance voltage signal source.
- What are the performance grade options available for the AMC1311-Q1?
The AMC1311-Q1 is available in two performance grade options: AMC1311-Q1 and AMC1311B-Q1.
- What is the operating temperature range for the AMC1311-Q1 and AMC1311B-Q1?
The operating temperature range is -40°C to +125°C for the AMC1311-Q1 and -55°C to +125°C for the AMC1311B-Q1.
- Is the AMC1311-Q1 AEC-Q100 qualified?
- What is the common-mode transient immunity (CMTI) of the AMC1311B-Q1?
The CMTI of the AMC1311B-Q1 is up to 150 kV/µs.
- Does the AMC1311-Q1 have integrated missing high-side supply voltage detection?
- What are typical applications for the AMC1311-Q1?
- Is the AMC1311-Q1 functional safety-capable?
