Part A
AMC3330DWER
Техасские инструменты
- Lifecycle
- Active
- Stock
- 3848 ПКС
- Package
- SOIC-16
- Series
- Специализированные ИК
Replacement verdict
Compatible functional replacement candidate
The AMC3301QDWERQ1 is a functionally compatible replacement candidate for the AMC3330DWER, sharing the same isolated amplifier architecture, SOIC-16 package, and single 3.3 V to 5.5 V supply rail. Designers should validate the ±50 mV versus ±250 mV input range and the automotive qualification grade before substituting in production, as these differences affect signal scaling and qualification requirements.
Input Voltage Range
High match
Package Type
High match
Supply Voltage
Validation required
Qualification Grade
Validation required
Parts at a glance
Part B
AMC3301QDWERQ1
Техасские инструменты
- Lifecycle
- Active
- Stock
- 2547 ПКС
- Series
- Линейные - Усилители - Усилители специального назначения
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 | AMC3301QDWERQ1 | Why it matters |
|---|---|---|---|
| Input Voltage Range | ±1 V (bipolar, ±1 V) | ±250 mV (bipolar, ±250 mV) | Determines the maximum signal amplitude the isolated amplifier can accept; a ±1 V input suits higher-voltage shunt/divider signals while ±250 mV targets low-level shunt sensing, so they are not directly interchangeable without signal scaling. |
| Fixed Gain | 2.0 V/V | 8.2 V/V | Gain sets the output-to-input transfer ratio; different gains mean the same input produces different output swings, requiring recalibration of downstream ADC scaling if substituted. |
| Input Resistance | 1 GΩ (typical) | ~4.1 kΩ (typical) | High input impedance allows direct connection to high-impedance dividers without loading, whereas a low input resistance loads the source and changes measurement accuracy, affecting substitutability. |
| Isolation Rating | 5 kV RMS (reinforced, per datasheet) | 5 kV RMS (reinforced, per datasheet) | Isolation rating defines safety and common-mode voltage tolerance; both share similar reinforced isolation, so this parameter is largely equivalent for safety-critical designs. |
| Qualification / Grade | Industrial grade | AEC-Q100 automotive qualified (Q1) | Automotive qualification (Q1) indicates enhanced reliability and temperature/quality screening; an industrial part cannot be substituted in automotive applications requiring AEC-Q100 compliance. |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | Temperature range affects usable environments; identical ranges mean both suit the same thermal conditions, though the automotive grade adds qualification rigor. |
| Package | 16-pin SOIC (wide body, DWE) | 16-pin SOIC (wide body, DWE) | Package footprint and pinout determine PCB compatibility; matching packages allow drop-in layout reuse, though pin functions must still be verified. |
| Supply Voltage (High Side) | 3.0 V to 5.5 V | 3.0 V to 5.5 V | Supply range must match the system rail; identical ranges mean both operate from the same high-side supply, easing substitution from a power standpoint. |
| Output Type | Differential analog output | Differential analog output | Differential outputs improve noise immunity and match differential ADC inputs; both being differential means the downstream interface topology is compatible. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AMC3330DWER | AMC3301QDWERQ1 |
|---|---|---|
| Part Status | Active | Active |
| Type | Isolated Amplifier | Isolation |
| Mounting Type | Surface Mount | Surface Mount |
| Base Product Number | - | AMC3301 |
| Grade | - | Automotive |
| Qualification | - | AEC-Q100 |
Frequently asked questions
What are the key differences between the AMC3330DWER and the AMC3301QDWERQ1?
The AMC3330DWER is a reinforced isolated amplifier with an integrated DC/DC converter, ±1-V input range, and differential output, offered in a 16-pin SOIC (DWE) package. The AMC3301QDWERQ1 is an automotive-qualified (AEC-Q100 Grade 1) reinforced isolated amplifier with an integrated DC/DC converter, ±250-mV input range, and differential output, also in a 16-pin SOIC (DWE) package. The primary differences are the input voltage range (±1 V vs ±250 mV) and the automotive qualification of the AMC3301QDWERQ1.
Are the AMC3330DWER and AMC3301QDWERQ1 pin-to-pin compatible?
Both devices are offered in the same 16-pin SOIC (DWE) package, and their pin functions (supply, input, output, and DC/DC converter pins) are aligned per the respective manufacturer datasheets. However, because the input ranges differ (±1 V vs ±250 mV), a direct drop-in replacement requires verifying that the signal chain and shunt resistor values are compatible with the alternate input range.
Is the AMC3301QDWERQ1 automotive qualified?
Yes. The AMC3301QDWERQ1 carries the Q1 suffix and is qualified to AEC-Q100 Grade 1, making it suitable for automotive applications. The AMC3330DWER is the industrial-grade variant and is not AEC-Q100 qualified.
What input voltage range does each device support?
The AMC3330DWER supports a nominal input range of ±1 V, while the AMC3301QDWERQ1 supports a nominal input range of ±250 mV. The narrower input range of the AMC3301QDWERQ1 is typically paired with a lower-value shunt resistor for current sensing.
Do both devices include an integrated isolated DC/DC converter?
Yes. Both the AMC3330DWER and the AMC3301QDWERQ1 integrate an isolated DC/DC converter, which eliminates the need for a separate isolated supply on the high-voltage side and simplifies isolated measurement designs.
What is the isolation rating of these amplifiers?
Both devices are reinforced isolated amplifiers designed to provide reinforced isolation per the manufacturer's datasheet, supporting high working-voltage isolation suitable for industrial and automotive high-voltage measurement. Designers should confirm the specific isolation voltage, working voltage, and certification ratings from the official datasheet for the target application.
Can the AMC3330DWER be used as a substitute for the AMC3301QDWERQ1 in an automotive design?
No. The AMC3330DWER is not AEC-Q100 qualified, so it should not be substituted for the AMC3301QDWERQ1 in automotive applications requiring Q1 qualification. Additionally, the ±1 V input range of the AMC3330DWER differs from the ±250 mV range of the AMC3301QDWERQ1, so the shunt and signal chain would need revalidation.