Part A
AMC3302DWER
德州儀器
- Lifecycle
- Active
- Stock
- 8913 件
- Series
- 線性放大器-專用放大器
Replacement verdict
Compatible functional replacement candidate
The AMC3330QDWERQ1 and AMC3302DWER are both isolated delta-sigma modulators in the same SOIC-16 wide-body package with comparable isolation ratings, making them a viable functional replacement candidate. However, the AMC3330QDWERQ1 is AEC-Q100 qualified with an integrated DC/DC converter for single-supply operation, while the AMC3302DWER requires a dual supply and is not automotive-qualified. Designers must validate supply architecture, input voltage range, and qualification requirements before substituting.
Input Voltage Range
Validation required
Supply Architecture
Validation required
Package Type
High match
Qualification Grade
Validation required
Parts at a glance
Part B
AMC3330QDWERQ1
德州儀器
- Lifecycle
- Active
- Stock
- 3759 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 | AMC3302DWER | Why it matters |
|---|---|---|---|
| Input Type | Fully differential (isolated amplifier) | Current shunt (isolated amplifier) | Determines whether the device is designed to sense a differential voltage directly or a shunt resistor drop, affecting circuit topology and substitutability. |
| Input Voltage Range | ±1 V (differential) | ±50 mV (shunt input) | The full-scale input range dictates the maximum signal the amplifier can accept, so mismatched ranges require different front-end scaling. |
| Gain | 2 (fixed) | 41 (fixed) | Fixed gain sets the output scaling relative to input; a large gain difference means the two parts are not directly interchangeable without recalibration. |
| Isolation Rating | 5 kV RMS (reinforced) | 5 kV RMS (reinforced) | Isolation rating defines the safety barrier between high-voltage and low-voltage domains; matching ratings supports equivalent safety performance. |
| Supply Voltage (High Side) | 3.0 V to 5.5 V | 3.0 V to 5.5 V | Compatible supply ranges allow the same high-side power rail to be reused, simplifying substitution. |
| Supply Voltage (Low Side) | 3.0 V to 5.5 V | 3.0 V to 5.5 V | Matching low-side supply requirements ensure the controller-side interface remains compatible. |
| Output Type | Differential analog | Differential analog | Both provide differential outputs, so the downstream ADC interface can remain the same. |
| Bandwidth | 330 kHz | 330 kHz | Signal bandwidth affects the ability to capture fast transients; identical bandwidth supports similar dynamic response. |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | Equivalent temperature ranges ensure both parts meet the same environmental requirements. |
| Package | 16-pin SOIC (wide body) | 16-pin SOIC (wide body) | Identical package and pinout allow drop-in board-level replacement without layout changes. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AMC3302DWER | AMC3330QDWERQ1 |
|---|---|---|
| Part Status | Active | Active |
| Base Product Number | AMC3302 | - |
| Type | Isolation | Isolation Amplifier |
| Applications | Driver | - |
| Mounting Type | Surface Mount | Surface Mount |
| Packaging | Cut Tape (CT), Tape & Reel (TR) | - |
| Series | - | Automotive, AEC-Q100 |
Frequently asked questions
What are the key differences between the AMC3330QDWERQ1 and the AMC3302DWER?
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 AMC3302DWER is a non-automotive isolated amplifier with a ±50 mV input range and a fixed gain of 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 AMC3302DWER pin-to-pin compatible?
Yes. 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, the surrounding signal chain and scaling must be re-evaluated before substitution.
What isolation rating do the AMC3330QDWERQ1 and AMC3302DWER provide?
Both devices provide reinforced isolation rated for 5 kV RMS (UL 1577) and are designed for basic and reinforced isolation per IEC 60747-17, with a maximum working isolation voltage of 1.5 kV peak. The AMC3330QDWERQ1 additionally carries automotive AEC-Q100 Grade 1 qualification.
What are the input voltage ranges of the AMC3330QDWERQ1 and AMC3302DWER?
The AMC3330QDWERQ1 has a specified input range of ±1 V with a fixed gain of 2, making it suitable for higher-level shunt or voltage sensing. The AMC3302DWER has a specified input range of ±50 mV with a fixed gain of 41, making it suited for low-level shunt current sensing.
Can the AMC3302DWER be used as a drop-in replacement for the AMC3330QDWERQ1 in an automotive design?
No. The AMC3302DWER is not AEC-Q100 qualified, so it does not meet automotive qualification requirements. Additionally, its ±50 mV input range and gain of 41 differ from the AMC3330QDWERQ1's ±1 V input range and gain of 2, so signal scaling and accuracy must be re-validated even in non-automotive applications.
Do both devices include an integrated isolated DC/DC converter?
Yes. Both the AMC3330QDWERQ1 and AMC3302DWER 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.
What are the supply voltage requirements for the AMC3330QDWERQ1 and AMC3302DWER?
Both devices operate from a single 3.3 V to 5.5 V supply on the low side (VDD1) and generate the high-side supply (VDD2) internally via the integrated isolated DC/DC converter, so no external isolated supply is required on the high side.
Which device should be selected for automotive shunt current sensing versus general isolated voltage sensing?
For automotive-qualified designs, the AMC3330QDWERQ1 is the appropriate choice due to its AEC-Q100 Grade 1 qualification and ±1 V input range suited to voltage or higher-level sensing. The AMC3302DWER, with its ±50 mV input range and gain of 41, is intended for low-level shunt current sensing in non-automotive applications.