Part A
AMC3330QDWERQ1
德州儀器
- Lifecycle
- Active
- Stock
- 3759 件
- Package
- SOIC-16
- Series
- 線性放大器-專用
Replacement verdict
Compatible functional replacement candidate
The AMC3330QDWERQ1 and AMC3301DWE are both isolated delta-sigma modulators with integrated DC/DC converters in the same SOIC-16 package, sharing a high degree of functional and pin-level similarity. However, they differ in input voltage range, input structure, and qualification grade, so the AMC3301DWE can serve as a functional substitute for the AMC3330QDWERQ1 only after validating the input signal range and the automotive qualification requirement for the target application.
Input Voltage Range
High match
Input Structure
Validation required
Package Type
High match
Qualification Grade
Validation required
Parts at a glance
Part B
AMC3301DWE
德州儀器
- Lifecycle
- Active
- Stock
- 3842 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 | AMC3330QDWERQ1 | AMC3301DWE | Why it matters |
|---|---|---|---|
| Input Voltage Range | ±1 V (fully differential) | ±250 mV (fully differential) | Defines the maximum signal swing the isolated amplifier can accept; a ±1 V input supports higher-voltage shunt sensing than the ±250 mV input, so the two parts are not directly interchangeable for a given shunt drop. |
| Fixed Gain | 2 | 8.2 | Gain sets the output scaling relative to the input; different gains mean the downstream ADC scaling and full-scale mapping must be recalculated when substituting one part for the other. |
| Input Offset Voltage (max) | ±0.5 mV | ±0.2 mV | Offset error directly limits DC measurement accuracy at the shunt; the tighter offset of the AMC3301DWE provides better low-current accuracy. |
| Input Offset Drift (max) | ±5 µV/°C | ±1 µV/°C | Drift determines how stable the offset remains over temperature; lower drift yields more consistent accuracy across the operating range. |
| Gain Error (max) | ±0.3% | ±0.2% | Gain error affects the slope accuracy of the transfer function; a smaller gain error improves overall measurement accuracy without calibration. |
| Input Resistance | 1 GΩ (typical) | 4.1 kΩ (typical) | Input resistance affects loading on the shunt and the allowable external filter resistance; the high-impedance input of the AMC3330QDWERQ1 allows larger series filter resistors, while the AMC3301DWE requires careful input network design. |
| Isolation Rating | 5 kV RMS (reinforced) | 4.25 kV RMS (reinforced) | Isolation rating determines the maximum working voltage and safety margin between the high- and low-voltage sides; substituting a lower-rated part may violate system safety requirements. |
| Qualification | AEC-Q100 qualified (automotive) | Industrial grade | Automotive qualification indicates tested robustness over extended temperature and reliability standards; an industrial-grade part may not meet automotive mission-profile requirements. |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | The temperature range must cover the application environment; both parts share the same range, so thermal envelope is not a differentiator here. |
| Package | 16-pin SOIC (wide body) | 16-pin SOIC (wide body) | Package and pinout determine board footprint and layout compatibility; identical packages simplify drop-in evaluation but pin functions must still be verified. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AMC3330QDWERQ1 | AMC3301DWE |
|---|---|---|
| Part Status | Active | Active |
| Type | Isolation Amplifier | Isolated |
| Applications | - | Driver |
| Mounting Type | Surface Mount | Surface Mount |
| Series | Automotive, AEC-Q100 | - |
Frequently asked questions
What are the key differences between the AMC3330QDWERQ1 and the AMC3301DWE?
The AMC3330QDWERQ1 is an automotive-qualified (AEC-Q100 Grade 1) isolated amplifier with a ±1 V input range and a fixed gain of 2, while the AMC3301DWE is a non-automotive isolated amplifier with a ±250 mV input range and a fixed gain of 8.41. Both are single-channel, reinforced isolated amplifiers in a 16-pin SOIC (DWE) package with integrated DC/DC converters, but they differ in input range, gain, and qualification grade.
Are the AMC3330QDWERQ1 and AMC3301DWE pin-to-pin compatible?
Yes. Both devices are offered in the same 16-pin SOIC (DWE) package and share the same pinout, including supply, ground, input, output, and integrated isolated DC/DC converter pins. However, pin-to-pin compatibility does not guarantee functional interchangeability because input range and gain differ.
Can the AMC3301DWE be used as a drop-in replacement for the AMC3330QDWERQ1?
No, not as a direct drop-in replacement. The AMC3330QDWERQ1 has a ±1 V input range with gain 2, whereas the AMC3301DWE has a ±250 mV input range with gain 8.41. Substitution requires revalidation of the input signal conditioning, output scaling, and system accuracy against the target design.
What is the isolation rating of these devices?
Both the AMC3330QDWERQ1 and AMC3301DWE are reinforced isolated amplifiers rated for 5 kV RMS isolation per UL 1577 and provide basic isolation per IEC 60747-17 (VDE 0884-17), with a maximum working isolation voltage of 1.5 kV peak. Designers should confirm the exact isolation specifications in the respective manufacturer datasheets for the target application.
Do both devices include an integrated isolated DC/DC converter?
Yes. Both the AMC3330QDWERQ1 and AMC3301DWE integrate an isolated DC/DC converter that supplies the high-side circuitry, eliminating the need for a separate isolated power supply on the field side. This simplifies design and reduces board space in isolated measurement systems.
Which device is suitable for automotive applications?
The AMC3330QDWERQ1 is the automotive-qualified option, meeting AEC-Q100 Grade 1 requirements and suitable for automotive systems such as traction inverters, onboard chargers, and battery management. The AMC3301DWE is not automotive-qualified and is intended for industrial and general-purpose isolated measurement applications.
What are the typical applications for each device?
The AMC3330QDWERQ1 is typically used in automotive current and voltage sensing, including motor drive and battery management systems, where AEC-Q100 qualification is required. The AMC3301DWE is typically used in industrial motor drives, solar inverters, and power supplies for shunt-based current sensing with a ±250 mV input range.
What supply voltage do these devices require?
Both devices operate from a single low-side supply of 3.0 V to 5.5 V, with the integrated DC/DC converter generating the high-side supply. The high-side supply is derived internally, so no external isolated supply is required. Designers should verify the exact recommended operating conditions in the manufacturer datasheet.