Part A
AMC3301DWER
Texas Instruments
- Lifecycle
- Active
- Stock
- 5943 PCS
- Package
- SOIC-16
- Series
- Linear - Amplifiers - Special Purpose
Replacement verdict
Compatible functional replacement candidate
The AMC3301DWER and AMC3330DWE are both isolated delta-sigma modulators in the same SOIC-16 wide-body package with matching isolation ratings and supply architecture, making them strong functional replacement candidates. The AMC3330DWE offers a wider input voltage range and higher gain, so the AMC3301DWER can serve as a drop-in substitute only where the narrower input range and lower gain remain within the application's signal chain requirements. Designers should validate input range, gain, and output filter configuration before committing to the substitution.
Package Type
High match
Isolation Rating
High match
Input Voltage Range
Validation required
Gain Configuration
Validation required
Parts at a glance
Part B
AMC3330DWE
Texas Instruments
- Lifecycle
- Active
- Stock
- 8987 PCS
- Package
- SOIC-16
- Series
- Linear - Amplifiers - Special Purpose
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 | AMC3330DWE | Why it matters |
|---|---|---|---|
| Input Voltage Range | ±250 mV | ±1 V | Defines the maximum differential signal the isolated amplifier can accept; the wider range of the AMC3330 allows direct sensing of higher-voltage shunts or signals without external attenuation. |
| Fixed Gain | 8.2 | 2 | Determines the output scaling relative to the input; a different gain changes the full-scale output mapping and affects downstream ADC resolution and signal conditioning design. |
| Input Offset Voltage (max) | ±0.3 mV | ±1 mV | Offset error directly impacts measurement accuracy at low signal levels; the lower offset of the AMC3301 provides better precision for small shunt voltages. |
| Input Bias Current (max) | ±30 nA | ±40 nA | Bias current flowing through the shunt or source impedance creates additional offset error; lower bias current improves accuracy, especially with higher source impedances. |
| Common-Mode Input Impedance | ~22 kΩ | ~1 MΩ | Higher common-mode impedance reduces loading on the sensed node and improves rejection of common-mode transients; the AMC3330 is better suited to high-impedance sensing nodes. |
| Isolation Rating (VISO) | 5 kV RMS (reinforced) | 5 kV RMS (reinforced) | Both provide reinforced isolation suitable for high-voltage safety requirements; identical isolation ratings mean either can meet the same safety barrier specification. |
| Supply Voltage (High Side) | 3.0 V to 5.5 V (integrated DC/DC) | 3.0 V to 5.5 V (integrated DC/DC) | Both integrate an isolated DC/DC converter, simplifying high-side power design; matching supply ranges means the same low-side supply can drive either device. |
| Output Type | Differential analog | Differential analog | Differential outputs improve noise immunity and allow direct interface to differential ADCs; identical output topology supports similar downstream signal chains. |
| Bandwidth | ~330 kHz | ~330 kHz | Bandwidth sets the maximum signal frequency that can be accurately amplified; matching bandwidth means comparable dynamic response for current-sensing loops. |
| Package | 16-pin SOIC (wide body) | 16-pin SOIC (wide body) | Identical package and pinout enable drop-in PCB compatibility, simplifying substitution without layout changes. |
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Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AMC3301DWER | AMC3330DWE |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Active | Active |
| Type | Isolated | Isolated |
| Applications | Driver | Driver |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key differences between the AMC3301DWER and AMC3330DWE?
The AMC3301DWER is a precision isolated amplifier with a fixed gain of 8.2 and a ±250 mV input range, while the AMC3330DWE is a precision isolated amplifier with a fixed gain of 2.0 and a ±1 V input range. Both are single-channel, reinforced isolated amplifiers in a 16-pin SOIC (DWE) package, but they differ in input voltage range, gain, and specified linearity performance.
Are the AMC3301DWER and AMC3330DWE pin-compatible?
Yes. Both devices are offered in the same 16-pin SOIC (DWE) package with the same pinout, allowing them to share a common PCB footprint. However, because their input ranges and gains differ, the surrounding signal-conditioning circuitry and system calibration must be adjusted accordingly.
What isolation rating do the AMC3301DWER and AMC3330DWE provide?
Both devices provide reinforced isolation rated for 5 kV RMS per UL 1577 and are designed for basic isolation per IEC 60747-17, with a maximum working isolation voltage of 1.5 kV peak. They are intended for isolated shunt-based current sensing and voltage sensing in industrial and motor-drive applications.
What input voltage range does each device support?
The AMC3301DWER supports a linear input range of ±250 mV with a fixed gain of 8.2, making it suitable for low-level shunt voltage measurements. The AMC3330DWE supports a linear input range of ±1 V with a fixed gain of 2.0, allowing direct sensing of higher-level signals without external attenuation.
Can the AMC3301DWER and AMC3330DWE be used interchangeably in an existing design?
Not without redesign. Although they share the same package and pinout, the different input ranges and gains mean the output scaling, shunt selection, and downstream ADC configuration must be recalculated. A direct drop-in substitution would produce incorrect measurement scaling and may exceed the input range of the alternate device.
What is the typical supply voltage and output configuration of these devices?
Both the AMC3301DWER and AMC3330DWE operate from a single 3.3 V or 5 V supply on the high side and a 3.0 V to 5.5 V supply on the low side, and provide a differential analog output centered at a common-mode voltage of approximately 1.44 V (with a 3.3 V low-side supply). The output is intended for direct connection to a differential-input ADC.
Which device is better suited for low-side shunt current sensing?
The AMC3301DWER, with its ±250 mV input range and gain of 8.2, is optimized for low-side shunt current sensing where the shunt voltage is small (typically tens of millivolts). The AMC3330DWE, with its ±1 V input range, is better suited for higher-level voltage sensing or applications where a larger input signal is available.