Overview
The AMC3330DWER, produced by Texas Instruments, is a precision, isolated amplifier designed for high-performance voltage measurement applications. This device features a fully integrated, isolated DC/DC converter, allowing it to operate from a single 3.3V or 5V supply. The AMC3330 is optimized for direct connection to high-impedance, voltage-signal sources and is particularly suited for measuring non-ground-referenced signals in space-constrained applications. The device boasts excellent performance, supporting accurate voltage monitoring and control, and includes diagnostic features to simplify system-level design.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Supply Voltage (VDD) | 3.0 V to 5.5 V | |
| Input Voltage Range | ±1 V | |
| Differential Input Impedance | 1.2 GΩ | |
| Output Voltage Range | Up to 2 V (differential) | For differential input voltages from -1 V to 1 V |
| Operating Temperature Range | -40°C to +125°C | |
| Isolation Barrier | Certified according to DIN EN IEC 60747-17 (VDE 0884-17) and UL1577 |
Key Features
- Single-supply operation from 3.3V or 5V with integrated DC/DC converter
- ±1V input voltage range optimized for high-impedance voltage-signal sources
- High differential input impedance (1.2 GΩ) for low gain-error signal sensing
- Differential analog output with a nominal gain of 2
- Integrated low-dropout regulator (LDO) for supply voltage stabilization
- Diagnostic output pin for monitoring device operation and output validity
- Spread-spectrum clock generation to reduce electromagnetic interference
Applications
- Voltage measurements in high-voltage applications requiring isolation, such as AC line voltage measurements at the input of a power factor correction (PFC) stage or the output of a DC/DC converter
- Space-constrained applications where non-ground-referenced signal measurement is necessary
- High-performance voltage monitoring and control systems
Q & A
- What is the supply voltage range for the AMC3330DWER?
The AMC3330DWER can operate from a single supply voltage of 3.0 V to 5.5 V.
- What is the input voltage range of the AMC3330DWER?
The input voltage range is ±1 V.
- What is the differential input impedance of the AMC3330DWER?
The differential input impedance is 1.2 GΩ.
- What is the nominal gain of the AMC3330DWER?
The nominal gain is 2 for differential input voltages from -1 V to 1 V.
- What certifications does the isolation barrier of the AMC3330DWER hold?
The isolation barrier is certified according to DIN EN IEC 60747-17 (VDE 0884-17) and UL1577.
- What is the purpose of the integrated DC/DC converter in the AMC3330DWER?
The integrated DC/DC converter allows the device to operate from a single supply voltage and enables measurement of non-ground-referenced signals.
- How does the AMC3330DWER reduce electromagnetic interference?
The device uses spread-spectrum clock generation to reduce the spectral density of electromagnetic interference.
- What is the diagnostic output pin used for in the AMC3330DWER?
The diagnostic output pin (DIAG) can be monitored to confirm the device is operational and the output voltage is valid.
- In what types of applications is the AMC3330DWER typically used?
The AMC3330DWER is typically used in high-voltage applications requiring isolation, such as AC line voltage measurements and space-constrained applications.
- What are the key benefits of using the AMC3330DWER in voltage measurement applications?
The key benefits include high differential input impedance, low gain-error signal sensing, and excellent performance for accurate voltage monitoring and control.
