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 AMC3302DWE is a functionally compatible replacement candidate for the AMC3330DWER, sharing the same isolated amplifier architecture, package footprint, and channel configuration, though the two devices differ in input voltage range and gain characteristics that must be validated against the target application requirements.
Package Type
High match
Channel Count
High match
Input Voltage Range
Validation required
Gain Configuration
Validation required
Parts at a glance
Part B
AMC3302DWE
德州儀器
- Lifecycle
- Active
- Stock
- 3709 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 | AMC3302DWE | 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 voltage drop for current sensing, which fundamentally changes the application circuit. |
| Input Voltage Range | ±1 V (differential) | ±50 mV (differential) | The full-scale input range must match the sensed signal amplitude; a ±50 mV device suits shunt sensing while a ±1 V device suits direct voltage sensing. |
| Fixed Gain | 2 V/V | 41 V/V | Gain sets the output scaling relative to input; the much higher gain of the current-sense variant is needed to amplify small shunt voltages. |
| Output Type | Differential analog output | Differential analog output | Both provide differential outputs for noise immunity, but the output swing relative to input differs due to gain, affecting downstream ADC configuration. |
| Isolation Rating | Reinforced isolation (5 kVrms, per datasheet) | Reinforced isolation (5 kVrms, per datasheet) | Isolation rating determines safety and suitability for high-voltage systems; both meet reinforced isolation but must be verified against system requirements. |
| Supply Voltage (High Side) | 3.0 V to 5.5 V | 3.0 V to 5.5 V | High-side supply compatibility affects the isolated power design; identical ranges simplify substitution of the power stage. |
| Supply Voltage (Low Side) | 3.0 V to 5.5 V | 3.0 V to 5.5 V | Low-side supply must match the controller/ADC logic level; identical ranges ease drop-in replacement on the isolated side. |
| Package | SOIC-16 (wide body) | SOIC-16 (wide body) | Package and pinout determine PCB footprint compatibility; matching packages allow the same board layout to be reused. |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | Industrial temperature range ensures reliable operation in harsh environments; identical ranges mean no thermal derating differences. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AMC3330DWER | AMC3302DWE |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Active | Active |
| Type | Isolated Amplifier | Isolated |
| Applications | - | Driver |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key differences between the AMC3330DWER and AMC3302DWE?
The AMC3330DWER is a reinforced isolated amplifier with an integrated DC/DC converter that provides an isolated output supply, while the AMC3302DWE is a reinforced isolated amplifier that requires an external isolated supply on the high side. Both are single-channel, precision isolated amplifiers in a 16-pin SOIC (DWE) package, but the AMC3330 integrates an isolated DC/DC converter to power the high-side circuitry, whereas the AMC3302 does not.
Do the AMC3330DWER and AMC3302DWE share the same package and pinout?
Both devices are offered in a 16-pin SOIC (DWE) package. However, the pin functions differ because the AMC3330DWER integrates an isolated DC/DC converter, which uses pins for the isolated supply and related functions that are not present on the AMC3302DWE. Therefore, the pinouts are not identical and the devices are not pin-for-pin drop-in replacements.
What is the input voltage range of these isolated amplifiers?
Both the AMC3330DWER and AMC3302DWE are designed for a nominal input voltage range of ±1 V (differential), with a specified linear input range of approximately ±1 V. The input is intended for shunt-resistor-based current sensing and similar low-level signal measurement in isolated systems.
What isolation rating do the AMC3330DWER and AMC3302DWE provide?
Both devices are reinforced isolated amplifiers rated for a maximum isolation working voltage of 1.5 kVRMS (per the reinforced isolation rating) and are qualified for a maximum transient isolation voltage of 7 kVPK per the manufacturer's datasheet. Designers should confirm the exact isolation specifications against the latest official datasheet for the specific grade and package.
Does the AMC3330DWER require an external isolated power supply on the high side?
No. The AMC3330DWER integrates an isolated DC/DC converter that generates the high-side supply from the low-side supply, so an external isolated supply on the high side is not required. In contrast, the AMC3302DWE requires an external isolated supply to power its high-side circuitry.
Can the AMC3330DWER and AMC3302DWE be used interchangeably in an existing design?
They should not be treated as direct drop-in replacements. Although both are reinforced isolated amplifiers in the same 16-pin SOIC (DWE) package, the AMC3330DWER includes an integrated isolated DC/DC converter and has different pin functions and supply requirements compared with the AMC3302DWE. Any substitution must be validated against the manufacturer datasheets and the target design's power, pinout, and isolation requirements.
What are the typical applications for the AMC3330DWER and AMC3302DWE?
Both devices are intended for isolated current and voltage sensing in industrial and automotive systems, such as motor drives, inverters, battery management systems, and power supplies. The AMC3330DWER is advantageous where the high-side supply is not readily available because its integrated isolated DC/DC converter simplifies the isolated measurement design, while the AMC3302DWE suits designs that already provide an external isolated high-side supply.