Part A
AMC3302DWER
德州儀器
- Lifecycle
- Active
- Stock
- 8913 件
- Series
- 線性放大器-專用放大器
Replacement verdict
Compatible functional replacement candidate
The AMC3301DWER and AMC3302DWER are functionally compatible isolated amplifier candidates sharing the same package, pinout, and isolation architecture, with the AMC3302DWER offering a higher input voltage range that requires validation against the target application's signal swing before substitution.
Package Type
High match
Isolation Rating
High match
Input Voltage Range
Validation required
Output Type
High match
Parts at a glance
Part B
AMC3301DWER
德州儀器
- Lifecycle
- Active
- Stock
- 5943 件
- Package
- SOIC-16
- Series
- 線性放大器-專用
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AMC3301DWER | AMC3302DWER | Why it matters |
|---|---|---|---|
| Input Voltage Range | ±250 mV | ±50 mV | Defines the differential signal span the isolated amplifier can accept; the AMC3302 targets much smaller shunt voltages, so it is not a drop-in replacement where the AMC3301's wider range is needed. |
| Gain | 8.2 V/V | 41 V/V | Fixed gain determines the output scaling relative to the input; the 5x difference means the downstream ADC scaling and system calibration differ between the two parts. |
| Input Offset Voltage (max) | ±0.2 mV | ±0.05 mV | Offset error directly limits DC measurement accuracy; the AMC3302 offers tighter offset, which matters for precision current-sense applications. |
| Input Offset Drift (max) | ±3 µV/°C | ±1 µV/°C | Drift over temperature affects accuracy in wide-temperature systems; the AMC3302's lower drift provides more stable measurements across the operating range. |
| Input Noise Density | 55 µV/√Hz (typ) | 25 µV/√Hz (typ) | Noise density sets the achievable resolution; the AMC3302's lower noise benefits low-amplitude signal measurement but is tied to its smaller input range. |
| Bandwidth (-3 dB) | 330 kHz | 100 kHz | Bandwidth determines the maximum signal frequency the amplifier can faithfully pass; the AMC3301 supports faster control loops than the AMC3302. |
| Isolation Rating | 5 kV RMS (reinforced) | 5 kV RMS (reinforced) | Reinforced isolation is a safety-critical parameter for high-voltage systems; identical ratings mean both meet the same isolation requirements. |
| Supply Voltage (High Side) | 3.0 V to 5.5 V | 3.0 V to 5.5 V | The isolated high-side supply range must match the system rail; identical ranges allow the same power design for either part. |
| Package | 16-pin SOIC (DWE) | 16-pin SOIC (DWE) | Package and pinout compatibility is essential for board-level substitutability; identical packages allow the same footprint. |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | The temperature range must cover the application environment; identical ranges mean both suit the same operating conditions. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AMC3302DWER | AMC3301DWER |
|---|---|---|
| Part Status | Active | Active |
| Base Product Number | AMC3302 | - |
| Type | Isolation | Isolated |
| Applications | Driver | Driver |
| Mounting Type | Surface Mount | Surface Mount |
| Packaging | Cut Tape (CT), Tape & Reel (TR) | - |
Frequently asked questions
What are the AMC3301DWER and AMC3302DWER?
The AMC3301DWER and AMC3302DWER are isolated amplifiers from Texas Instruments designed for shunt-based current sensing in high-voltage systems. Both integrate a delta-sigma modulator with an isolated DC-DC converter in a single package, providing galvanic isolation between the high-voltage sensing side and the low-voltage controller side.
What is the key difference between the AMC3301DWER and AMC3302DWER?
The primary difference is the input voltage range. The AMC3301 supports a specified input range of ±250 mV, while the AMC3302 supports a wider input range of ±50 mV with a higher gain. The AMC3302 is optimized for lower shunt voltage drops, while the AMC3301 accommodates larger shunt voltage signals.
What isolation rating do the AMC3301DWER and AMC3302DWER provide?
Both devices are rated for reinforced isolation with a withstand voltage of 5 kV RMS per UL 1577 and a maximum working isolation voltage of 1.5 kV peak per VDE V 0884-11. This makes them suitable for high-voltage industrial and motor-drive applications requiring reinforced galvanic isolation.
What package do the AMC3301DWER and AMC3302DWER use?
Both devices are offered in a 16-pin SOIC (DW) package with a wide-body configuration that provides the creepage and clearance necessary for reinforced isolation. The package is specified for operation over the –40°C to +125°C temperature range.
What output interface do the AMC3301DWER and AMC3302DWER provide?
Both devices output a differential delta-sigma modulated bitstream that is typically processed by a digital filter or a microcontroller/Sigma-Delta modulator input. The output is referenced to the low-side supply and is intended for isolated current-sensing signal chains.
Can the AMC3301DWER and AMC3302DWER be used interchangeably in the same design?
No, they are not directly interchangeable. Because the AMC3302 has a different input voltage range and gain than the AMC3301, substituting one for the other changes the signal scaling and measurement range. A design change must account for the different shunt voltage range and the resulting digital output scaling.
What supply voltages do the AMC3301DWER and AMC3302DWER require?
Both devices operate from a single low-side supply of 3.0 V to 5.5 V. The high-side (isolated) supply is generated internally by the integrated DC-DC converter, so no separate isolated supply is required on the high-voltage side.
What are typical applications for the AMC3301DWER and AMC3302DWER?
Typical applications include isolated shunt-based current sensing in motor drives, inverters, solar string inverters, battery management systems, and industrial power supplies. The AMC3302 is often chosen for low-side shunt sensing where the shunt voltage is small, while the AMC3301 suits applications with larger shunt voltage signals.