Part A
AMC3330DWER
Техасские инструменты
- Lifecycle
- Active
- Stock
- 3848 ПКС
- Package
- SOIC-16
- Series
- Специализированные ИК
Replacement verdict
Compatible functional replacement candidate
The AMC3301DWE is a functionally compatible replacement candidate for the AMC3330DWER, sharing the same isolated amplifier architecture, SOIC-16 package, and single 3.3 V to 5.5 V supply rail. Designers should validate the input voltage range and output configuration against the target application before substitution, as the two devices differ in their input structures and output signal conditioning.
Package Type
High match
Supply Voltage Range
High match
Input Voltage Range
Validation required
Output Type
Validation required
Parts at a glance
Part B
AMC3301DWE
Техасские инструменты
- Lifecycle
- Active
- Stock
- 3842 ПКС
- Package
- SOIC-16
- Series
- Линейные - Усилители - Специальное назначение
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AMC3330DWER | AMC3301DWE | Why it matters |
|---|---|---|---|
| Input Configuration | Fully differential input | Single-ended input | Determines whether the device can directly accept a differential signal (e.g., shunt with both terminals sensed) or requires a single-ended referenced signal, affecting circuit topology and accuracy. |
| Input Voltage Range | ±1 V (differential) | ±250 mV (single-ended) | Defines the maximum signal swing the isolated amplifier can accept; a wider range allows direct sensing of higher-voltage shunts without external attenuation. |
| Fixed Gain | 2 | 8.2 | Sets the output-to-input scaling; different gains require different downstream ADC scaling and affect overall system resolution and full-scale mapping. |
| Input Offset Error | ±0.3 mV (max) | ±0.2 mV (max) | Offset directly adds to measurement error at zero current; lower offset improves accuracy especially for small-signal or low-current measurements. |
| Gain Error | ±0.3% (max) | ±0.3% (max) | Gain error affects full-scale accuracy; matching values indicate similar gain accuracy, though input range and gain differ. |
| Isolation Rating | 5 kV RMS (reinforced) | 5 kV RMS (reinforced) | Both provide reinforced isolation suitable for high-voltage safety requirements; identical rating means equivalent safety capability. |
| Supply Voltage (High Side) | 3.0 V to 5.5 V | 3.0 V to 5.5 V | Determines compatibility with the isolated-side power rail; identical range means the same supply can be reused. |
| Supply Voltage (Low Side) | 3.0 V to 5.5 V | 3.0 V to 5.5 V | Determines compatibility with the controller-side logic supply; identical range supports drop-in reuse of the digital interface supply. |
| Package | 16-pin SOIC (DWE) | 16-pin SOIC (DWE) | Same package and pin count enable PCB footprint compatibility, though pin functions may differ between the two devices. |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | Identical temperature range ensures equivalent environmental robustness for industrial applications. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AMC3330DWER | AMC3301DWE |
|---|---|---|
| Part Status | Active | Active |
| Type | Isolated Amplifier | Isolated |
| Applications | - | Driver |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key differences between the AMC3330DWER and AMC3301DWE?
Both are isolated amplifiers in a 16-pin SOIC (DWE) package from Texas Instruments. The AMC3330DWER integrates a DC/DC converter to generate an isolated supply for the high-side, allowing single-supply operation on the low side, while the AMC3301DWE requires an external isolated supply on the high side. The AMC3330 is a ±1-V input, isolated amplifier with integrated DC/DC; the AMC3301 is a ±250-mV input, isolated amplifier without integrated DC/DC. Input voltage range, isolation supply architecture, and gain/input scaling differ, so they are not drop-in replacements.
Are the AMC3330DWER and AMC3301DWE pin-to-pin compatible?
No. Although both use the same 16-pin SOIC (DWE) package footprint, the pin functions differ because the AMC3330DWER includes an integrated isolated DC/DC converter with supply and ground pins for the high side, whereas the AMC3301DWE expects an externally provided isolated high-side supply. The PCB layout and pin connections must be designed for the specific device; they cannot be interchanged on the same board without redesign.
What input voltage range does each device support?
The AMC3330DWER is specified for a ±1-V input range (differential input), while the AMC3301DWE is specified for a ±250-mV input range. The different full-scale input ranges mean the shunt resistor and signal scaling must be selected according to the specific device; substituting one for the other changes the measurement scaling and accuracy.
Does the AMC3330DWER eliminate the need for an isolated high-side supply?
Yes. The AMC3330DWER integrates an isolated DC/DC converter that generates the high-side supply from the low-side supply, so no separate isolated supply is required on the high side. The AMC3301DWE does not include this converter and requires an external isolated supply for its high-side circuitry. This is a primary architectural difference between the two parts.
What is the isolation rating of these devices?
Both the AMC3330DWER and AMC3301DWE are reinforced isolated amplifiers rated for 5-kV RMS isolation (per the DWE package) with high common-mode transient immunity, suitable for isolated shunt-based current sensing in industrial and motor-drive applications. Designers should confirm the exact isolation specifications and certifications in the respective TI datasheets for the target end equipment.
Can the AMC3301DWE be used as a direct substitute for the AMC3330DWER?
No. Beyond the pin and supply architecture differences, the input full-scale range differs (±250 mV vs ±1 V), so the signal chain scaling would be incorrect. A direct substitution would require redesign of the shunt resistor, supply circuitry, and PCB layout, and must be validated against the TI datasheets for both devices before use.
What applications are these isolated amplifiers intended for?
Both devices target isolated current and voltage sensing in industrial systems such as motor drives, inverters, solar string inverters, and battery management, where galvanic isolation between high-voltage and low-voltage domains is required. The AMC3330DWER's integrated DC/DC simplifies designs where no isolated high-side supply is available, while the AMC3301DWE suits designs that already provide an isolated high-side rail.