Part A
AMC1300BDWV
Texas Instruments
- Lifecycle
- Active
- Stock
- 6086 PCS
- Package
- SOIC-8
- Series
- Linear - Amplifiers - Special Purpose
Replacement verdict
Not a drop-in replacement
The AMC1304M25DWR and AMC1300BDWV are both isolated delta-sigma modulator amplifiers, but they differ fundamentally in input architecture, output interface, and package footprint, so neither part can directly substitute for the other in an existing design without circuit and layout changes.
Different input architecture
Different output interface
Different package footprint
Different reference topology
Parts at a glance
Part B
AMC1304M25DWR
Texas Instruments
- Lifecycle
- Active
- Stock
- 2290 PCS
- Package
- SOIC-16
- Series
- Acquisição de dados - ADCs-DACs - Objetivo Especial
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AMC1304M25DWR | AMC1300BDWV | Why it matters |
|---|---|---|---|
| Input Type | Current sense (shunt, isolated delta-sigma modulator) | Voltage sense (isolated amplifier) | Determines whether the device measures current via a shunt or voltage directly; these are not functionally interchangeable in a signal chain. |
| Output Format | 1-bit delta-sigma bitstream | Analog differential output | A bitstream requires a digital filter/decimator (e.g., in an MCU), while an analog output feeds an ADC; the downstream interface differs fundamentally. |
| Isolation Rating | 5000 V RMS (reinforced) | 5000 V RMS (reinforced) | Both provide reinforced isolation suitable for high-voltage sensing, so isolation capability is comparable. |
| Input Voltage Range | ±250 mV (shunt input) | ±250 mV (with external gain setting) | The small differential input range suits shunt-based current sensing; the amplifier's gain is set externally, affecting usable range. |
| Supply Voltage | 3.0 V to 5.5 V (high side), 3.0 V to 5.5 V (low side) | 3.0 V to 5.5 V (high side), 3.0 V to 5.5 V (low side) | Both support common 3.3 V and 5 V rails on either side of the isolation barrier. |
| Package | SOIC-16 (wide body) | SOIC-8 (wide body) | Different footprints and pin counts mean the PCB layout cannot be shared without redesign. |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | Both cover industrial temperature ranges, so thermal suitability is equivalent. |
| Typical Application | Motor drive and inverter current sensing | Isolated voltage and current sensing with external shunt | The modulator targets direct shunt current sensing, while the amplifier is a general isolated signal conditioner; substitution changes system architecture. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AMC1300BDWV | AMC1304M25DWR |
|---|---|---|
| Part Status | Active | Active |
| Type | Isolation | Isolated Module |
| Applications | Current Sensing, Power Management | - |
| Mounting Type | Surface Mount | Surface Mount |
| Number of Channels | - | 1 |
| Resolution(Bits) | - | 16 b |
| Sampling Rate(Per Second) | - | 78k |
| Data Interface | - | CMOS, Serial |
| Voltage Supply Source | - | Single Supply |
| Voltage - Supply | - | 3V ~ 5.5V |
| Operating Temperature | - | -40°C ~ 125°C |
Frequently asked questions
What are the primary functional differences between the AMC1304M25DWR and the AMC1300BDWV?
The AMC1304M25DWR is a precision, isolated delta-sigma modulator with a ±250 mV input range and an integrated LDO regulator, designed for direct shunt-resistor current sensing. The AMC1300BDWV is an isolated amplifier with a ±250 mV input range and a fixed gain of 8.2, providing a differential output for current sensing. The AMC1304M25DWR outputs a 1-bit delta-sigma bitstream, while the AMC1300BDWV outputs an analog differential voltage.
Are the AMC1304M25DWR and AMC1300BDWV pin-to-pin compatible?
No. The AMC1304M25DWR is supplied in a 16-pin SOIC (DWR) package, while the AMC1300BDWV is supplied in an 8-pin SOIC (DWV) package. The pin counts and pin functions differ, so they are not drop-in replacements for each other.
What isolation rating do the AMC1304M25DWR and AMC1300BDWV provide?
Both devices are reinforced isolated components. The AMC1304M25DWR provides a withstand isolation voltage of 5000 VRMS per UL 1577 and a maximum working isolation voltage of 1500 VDC. The AMC1300BDWV provides a withstand isolation voltage of 5000 VRMS per UL 1577 and a maximum working isolation voltage of 1500 VDC. Both offer reinforced isolation suitable for high-voltage industrial applications.
Which device is better suited for direct connection to a microcontroller ADC?
The AMC1300BDWV is better suited for direct connection to a microcontroller ADC because it provides an analog differential output voltage that can be sampled by a standard SAR or delta-sigma ADC. The AMC1304M25DWR outputs a 1-bit delta-sigma bitstream that requires a digital filter (such as an sinc filter) in the microcontroller or FPGA to reconstruct the measurement, so it is not directly compatible with a standard ADC input.
Do both devices integrate an isolated DC-DC converter or LDO regulator?
No. The AMC1304M25DWR integrates an LDO regulator on the high-side to power the isolated side from a single supply, simplifying the isolated power design. The AMC1300BDWV does not integrate an LDO regulator and requires separate isolated supplies for the high-side and low-side, so external isolated power generation is needed.
What are the input voltage ranges of the AMC1304M25DWR and AMC1300BDWV?
Both devices are specified for a linear input range of ±250 mV, making them suitable for shunt-resistor-based current sensing in motor drive and inverter applications. The AMC1304M25DWR is optimized for direct shunt connection with its ±250 mV input range, and the AMC1300BDWV also specifies a ±250 mV input range with a fixed gain of 8.2.
Can the AMC1304M25DWR and AMC1300BDWV be used in the same motor drive current-sensing application?
Yes, both are intended for isolated current sensing in motor drives and inverters, but they require different signal-chain designs. The AMC1304M25DWR requires a digital filter to process its delta-sigma bitstream, while the AMC1300BDWV requires an ADC to sample its analog differential output. The choice depends on whether the system architecture prefers a digital modulator interface or an analog amplifier interface.
What are the typical supply voltage requirements for the AMC1304M25DWR and AMC1300BDWV?
The AMC1304M25DWR operates from a single 5 V supply on the low side and integrates an LDO to derive the high-side supply, simplifying the isolated power scheme. The AMC1300BDWV requires a 5 V supply on the high side and a 3.3 V or 5 V supply on the low side, with separate isolated supplies required for each side. Designers should verify the exact recommended operating conditions in the respective manufacturer datasheets.