Overview
The AMC1200BDUB is a precision isolation amplifier produced by Texas Instruments. This device is designed to provide high accuracy and reliability in current sensing applications, particularly those involving shunt resistors. The AMC1200BDUB features a silicon dioxide (SiO2) barrier that ensures galvanic isolation, protecting sensitive circuitry from noise currents and magnetic interference. It operates over an extended industrial temperature range of -40°C to 105°C and is available in an 8-pin SOP (DUB) package.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Input Voltage Range | -250 | 250 | mV | |
| Nonlinearity | 0.075% | |||
| Offset Error | 1.5 mV | |||
| Noise (RMS) | 3.1 | mV | ||
| High-Side Supply Current | 8 mA | |||
| Input Bandwidth | 60 | kHz | ||
| Fixed Gain | 8 (0.5% accuracy) | |||
| Common Mode Rejection Ratio | 108 | dB | ||
| Isolation Voltage | 4250 V (PEAK) | |||
| Working Voltage | 1200 V (PEAK) | |||
| Transient Immunity | 10 | kV/µs | ||
| Operating Temperature Range | -40 | 105 | °C |
Key Features
- ±250-mV input voltage range optimized for shunt resistors
- Very low nonlinearity: 0.075% maximum at 5 V
- Low offset error: 1.5 mV maximum
- Low noise: 3.1 mV RMS typical
- Low high-side supply current: 8 mA maximum at 5 V
- Input bandwidth: 60 kHz minimum
- Fixed gain: 8 (0.5% accuracy)
- High common mode rejection ratio: 108 dB
- 3.3-V operation on low-side
- Certified galvanic isolation: UL1577 and VDE V 0884-10 approved
- Transient immunity: 10 kV/µs minimum
- Typical 10-year lifespan at rated working voltage
Applications
- Shunt resistor based current sensing in motor control
- Green energy systems
- Frequency inverters
- Uninterruptible power supplies (UPS)
Q & A
- What is the input voltage range of the AMC1200BDUB?
The input voltage range is ±250 mV, optimized for shunt resistors.
- What is the nonlinearity of the AMC1200BDUB?
The nonlinearity is 0.075% maximum at 5 V.
- What is the offset error of the AMC1200BDUB?
The offset error is 1.5 mV maximum.
- What is the noise level of the AMC1200BDUB?
The noise level is 3.1 mV RMS typical.
- What is the high-side supply current of the AMC1200BDUB?
The high-side supply current is 8 mA maximum at 5 V.
- What is the input bandwidth of the AMC1200BDUB?
The input bandwidth is 60 kHz minimum.
- What is the fixed gain of the AMC1200BDUB?
The fixed gain is 8 with 0.5% accuracy.
- What is the common mode rejection ratio of the AMC1200BDUB?
The common mode rejection ratio is 108 dB.
- What are the isolation certifications for the AMC1200BDUB?
The device is certified to UL1577 and VDE V 0884-10 standards.
- What is the operating temperature range of the AMC1200BDUB?
The operating temperature range is -40°C to 105°C.
