Part A
AMC3330DWER
德州儀器
- Lifecycle
- Active
- Stock
- 3848 件
- Package
- SOIC-16
- Series
- 專用集成電路
Replacement verdict
Compatible functional replacement candidate
The AMC3330DWER and AMC3302QDWERQ1 are both isolated amplifiers in the same SOIC-16 (DW) package with comparable isolation ratings and supply architecture, making them strong functional replacement candidates. However, the AMC3302QDWERQ1 is an automotive-qualified variant with a wider specified input range and tighter gain error, while the AMC3330DWER offers an integrated DC/DC converter for single-supply operation. Designers should validate input range, gain accuracy, and qualification requirements against the target application before substituting.
Package Type
High match
Isolation Rating
High match
Input Voltage Range
Validation required
Qualification Grade
Validation required
Parts at a glance
Part B
AMC3302QDWERQ1
德州儀器
- Lifecycle
- Active
- Stock
- 9368 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 | AMC3330DWER | AMC3302QDWERQ1 | Why it matters |
|---|---|---|---|
| Input Type | Voltage input (isolated amplifier) | Current shunt input (isolated amplifier) | Determines whether the device measures a voltage directly or a shunt-derived current, which fundamentally changes the sensing circuit topology. |
| Input Voltage Range | ±1 V (differential) | ±50 mV (shunt input) | The full-scale input range must match the sensed signal amplitude; a ±50 mV shunt input cannot directly accept a ±1 V signal without external scaling. |
| Fixed Gain | 2 | 41 | Gain sets the output-to-input transfer ratio; the very different gains mean the output scaling and downstream ADC requirements differ significantly. |
| Isolation Rating | 5 kV RMS (reinforced) | 5 kV RMS (reinforced) | Both provide reinforced isolation, so safety isolation capability is equivalent for high-voltage applications. |
| Output Interface | Differential analog output | Differential analog output | Both present a differential analog output suitable for driving a delta-sigma or SAR ADC, so the downstream interface style is compatible. |
| Supply Voltage (High Side) | 3.0 V to 5.5 V | 3.0 V to 5.5 V | Matching high-side supply ranges allow the same isolated power scheme to be reused across both parts. |
| Supply Voltage (Low Side) | 3.0 V to 5.5 V | 3.0 V to 5.5 V | Identical low-side supply requirements mean the controller-side power rail is interchangeable. |
| Package | 16-pin SOIC (DWE) | 16-pin SOIC (DWE) | Same package and pin count allow a common PCB footprint, though pin functions must still be verified. |
| Qualification | Industrial grade | AEC-Q100 automotive qualified | The automotive qualification of the Q1 variant is required for automotive applications, while the industrial part may not meet those reliability standards. |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | Equivalent temperature ranges mean both can serve in the same thermal environment. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AMC3330DWER | AMC3302QDWERQ1 |
|---|---|---|
| Part Status | Active | Active |
| Type | Isolated Amplifier | Amplifier |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key differences between the AMC3330DWER and the AMC3302QDWERQ1?
The AMC3330DWER is a precision isolated amplifier with a ±1 V input range and fixed gain of 2, while the AMC3302QDWERQ1 is an automotive-qualified (AEC-Q100 Grade 1) isolated amplifier with a ±50 mV input range and fixed gain of 41. The AMC3302QDWERQ1 is designed for shunt-based current sensing in automotive and industrial applications, whereas the AMC3330DWER targets general-purpose isolated voltage and current sensing with a wider input range.
Are the AMC3330DWER and AMC3302QDWERQ1 pin-to-pin compatible?
Both devices are offered in the same 16-pin SOIC (DWE) package with the same pinout, so they are pin-to-pin compatible at the package level. However, because their input ranges and gains differ significantly, they are not functionally interchangeable without redesigning the signal chain and validating the new transfer function.
What is the input voltage range of each device?
The AMC3330DWER supports a nominal input range of ±1 V (differential), while the AMC3302QDWERQ1 supports a nominal input range of ±50 mV (differential). The much smaller input range of the AMC3302QDWERQ1 makes it suitable for low-side or high-side shunt current sensing where the shunt voltage is small.
What are the fixed gains of the AMC3330DWER and AMC3302QDWERQ1?
The AMC3330DWER has a fixed gain of 2, and the AMC3302QDWERQ1 has a fixed gain of 41. These gains are set internally and cannot be adjusted externally, so the output swing and downstream ADC scaling must be matched to the selected device.
Is the AMC3302QDWERQ1 automotive qualified, and is the AMC3330DWER?
The AMC3302QDWERQ1 is qualified to AEC-Q100 Grade 1 for automotive applications, as indicated by the "Q1" suffix. The AMC3330DWER is a standard industrial-grade device and is not automotive qualified. Designs requiring automotive qualification should use the AMC3302QDWERQ1.
What is the isolation rating of these devices?
Both the AMC3330DWER and AMC3302QDWERQ1 are reinforced isolated amplifiers rated for 5 kV RMS isolation (per the DWE package) and are designed to meet UL 1577 and VDE 0884-17 reinforced isolation requirements. Designers should confirm the exact isolation specification and certification details in the respective manufacturer datasheets for the target end equipment.
Can the AMC3330DWER be used as a drop-in replacement for the AMC3302QDWERQ1 in a shunt current-sensing design?
No. Although the packages and pinouts match, the AMC3330DWER has a ±1 V input range and gain of 2, while the AMC3302QDWERQ1 has a ±50 mV input range and gain of 41. Substituting one for the other would change the measurement scaling by more than an order of magnitude and would also lose automotive qualification, so a redesign and revalidation would be required.
Which device should be selected for automotive shunt current sensing?
The AMC3302QDWERQ1 should be selected for automotive shunt current sensing because it is AEC-Q100 Grade 1 qualified and its ±50 mV input range with gain of 41 is optimized for small shunt voltages. The AMC3330DWER is better suited to industrial applications requiring a wider ±1 V input range.