Part A
AMC3330DWER
Texas Instruments
- Lifecycle
- Active
- Stock
- 3848 PCS
- Package
- SOIC-16
- Series
- Specialized ICs
Replacement verdict
Compatible functional replacement candidate
The AMC3301DWER and AMC3330DWER are both isolated delta-sigma modulators in the same SOIC-16 (DWE) package with matching isolation ratings and supply architecture, making them strong functional replacement candidates. The primary distinction is the input voltage range: the AMC3301 supports a bipolar ±250 mV input, while the AMC3330 is optimized for a unipolar ±1 V input, so the correct choice depends on the shunt signal amplitude in the target design. Designers should confirm input range, gain, and output filter requirements before substituting one for the other.
Input Voltage Range
Validation required
Package Type
High match
Isolation Rating
High match
Output Type
High match
Parts at a glance
Part B
AMC3301DWER
Texas Instruments
- Lifecycle
- Active
- Stock
- 5943 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 | AMC3330DWER | Why it matters |
|---|---|---|---|
| Input Voltage Range | ±250 mV | ±1 V | Defines the maximum differential signal the isolated amplifier can accept; a wider range allows direct sensing of higher-voltage shunts without external attenuation. |
| Fixed Gain | 8.2 | 2 | Determines the output-to-input scaling; gain affects the full-scale output swing and the resolution achievable for a given input signal. |
| Input Offset Error | ±0.3 mV (max) | ±0.5 mV (max) | Offset error directly limits DC measurement accuracy, especially important for low-level shunt sensing in motor and power-supply current loops. |
| Gain Error | ±0.2% (max) | ±0.3% (max) | Gain error affects the accuracy of the measured current over the full input range and impacts system-level calibration requirements. |
| Input Bandwidth | 330 kHz | 300 kHz | Bandwidth sets the maximum signal frequency that can be accurately amplified, which is critical for fast current-loop and overcurrent detection. |
| Isolation Rating | 5 kV RMS (reinforced) | 5 kV RMS (reinforced) | Reinforced isolation rating determines the safety and voltage withstand capability between the high-voltage and low-voltage domains. |
| Supply Voltage (High Side) | 3.0 V to 5.5 V | 3.0 V to 5.5 V | The high-side supply range must match the available isolated power rail; both parts support common 3.3 V and 5 V systems. |
| Supply Voltage (Low Side) | 3.0 V to 5.5 V | 3.0 V to 5.5 V | The low-side supply must be compatible with the controller or ADC reference; matching ranges simplify drop-in substitution. |
| Package | 16-pin SOIC (DWE) | 16-pin SOIC (DWE) | Identical package and pinout enable direct PCB footprint compatibility, which is essential for functional substitutability. |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | The temperature range must cover the application environment; matching industrial-grade ranges supports use in harsh conditions. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AMC3330DWER | AMC3301DWER |
|---|---|---|
| Part Status | Active | Active |
| Type | Isolated Amplifier | Isolated |
| Mounting Type | Surface Mount | Surface Mount |
| Applications | - | Driver |
Frequently asked questions
What are the key differences between the AMC3301DWER and AMC3330DWER isolated amplifiers?
Both are single-channel, isolated delta-sigma modulators in a 16-pin SOIC (DWE) package with reinforced isolation. The AMC3301DWER is a precision current-sensing amplifier with a fixed gain of 8 and a ±50 mV input range, while the AMC3330DWER is a voltage-sensing amplifier with a fixed gain of 2 and a ±1 V input range. Their input structures and gain stages differ, so they are not interchangeable without design validation.
Do the AMC3301DWER and AMC3330DWER have the same package and pinout?
Yes. Both devices are offered in the same 16-pin SOIC (DWE) package and share a common pinout, including the isolated input side, the isolated supply pins, and the digital output and clock pins. This allows a common PCB footprint, but the differing input ranges and gains must still be accounted for in the signal chain.
What are the input voltage ranges of the AMC3301DWER and AMC3330DWER?
The AMC3301DWER is designed for a ±50 mV input range with a gain of 8, making it suitable for shunt-based current sensing. The AMC3330DWER has a ±1 V input range with a gain of 2, making it suitable for direct voltage sensing. The input range and gain must match the sensed signal to avoid saturation or loss of resolution.
Are the AMC3301DWER and AMC3330DWER pin-to-pin compatible for direct substitution?
They share the same package and pinout, but they are not functionally interchangeable. Because the input range and gain differ (AMC3301DWER: ±50 mV, gain 8; AMC3330DWER: ±1 V, gain 2), a direct substitution changes the measurement scaling and may saturate the input. Substitution requires revalidation of the sensing circuit and digital filter scaling.
What isolation rating do the AMC3301DWER and AMC3330DWER provide?
Both devices are reinforced isolated amplifiers rated for 5 kV RMS isolation per UL 1577 and are designed to meet reinforced isolation requirements. They are intended for high-voltage sensing applications where galvanic isolation between the high-voltage and low-voltage domains is required. Designers should confirm the specific isolation parameters in the respective manufacturer datasheets for their application.
What digital output format do the AMC3301DWER and AMC3330DWER provide?
Both devices provide a delta-sigma modulated 1-bit digital output stream that is synchronized to an external clock. The modulator output is intended to be processed by a digital filter (such as a sinc filter) in an FPGA or microcontroller to reconstruct the analog signal. The output format is identical, but the scaling differs due to the different input ranges and gains.
Which device should be selected for shunt-based current sensing versus voltage sensing?
The AMC3301DWER, with its ±50 mV input range and gain of 8, is intended for shunt-based current sensing where a small voltage drop across a shunt resistor is measured. The AMC3330DWER, with its ±1 V input range and gain of 2, is intended for direct voltage sensing. Selection should be based on the sensed signal amplitude and the required measurement resolution.
Do the AMC3301DWER and AMC3330DWER require the same external components?
Both devices require an isolated supply on the high-voltage side and a low-voltage supply on the controller side, along with decoupling capacitors and an external clock source. Because the input ranges and gains differ, the input filtering and shunt or divider networks must be designed separately for each device. External component values should be taken from the respective manufacturer datasheets.