Part A
AMC1300BDWVR
Texas Instruments
- Lifecycle
- Active
- Stock
- 1306 PCS
- Package
- SOIC-8
- Series
- Linear - Amplifiers - Special Purpose
Replacement verdict
Compatible functional replacement candidate
The AMC1304M25DWR and AMC1300BDWVR are both isolated delta-sigma modulator families from Texas Instruments sharing a compatible SOIC-16 wide-body footprint and 5 V supply architecture, but they differ in input structure, isolation rating, and clocking scheme. The AMC1300BDWVR is a functional candidate only where the design can accommodate its lower isolation voltage and externally clocked operation; the AMC1304M25DWR remains the preferred choice for higher-isolation, internally clocked current-sensing applications.
Isolation Rating
Validation required
Input Configuration
Validation required
Clocking Scheme
Validation required
Package Type
High match
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 | AMC1300BDWVR | Why it matters |
|---|---|---|---|
| Input Type | Current shunt input (isolated delta-sigma modulator) | Voltage input (isolated amplifier) | Determines whether the device measures current via a shunt or directly senses voltage; these are not functionally interchangeable. |
| Output Format | 1-bit delta-sigma bitstream | Differential analog voltage | A digital bitstream requires an external digital filter/decoder, while an analog output feeds an ADC directly; the downstream signal chain 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 sense) | ±250 mV (with external divider for higher voltages) | The narrow differential input range dictates the shunt or divider design needed to interface with the measured signal. |
| 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) | Compatible supply rails allow similar power design on both sides of the isolation barrier. |
| Package | SOIC-16 (wide body) | SOIC-8 (wide body) | Different footprints and pin counts prevent drop-in board replacement without layout changes. |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | Identical industrial temperature ratings support use in the same harsh environments. |
| Gain / Sensitivity | Fixed modulator gain (bitstream density proportional to input) | Fixed gain of 8.2 V/V | The signal transfer characteristic differs, so scaling and calibration in the system must be redesigned. |
| Typical Application | Motor drive current sensing, shunt-based current measurement | Voltage sensing, isolated signal conditioning | The intended measurement function differs, so they serve different roles in a system and are not direct substitutes. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AMC1300BDWVR | 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 AMC1300BDWVR?
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 with a 20 MHz clock. The AMC1300BDWVR is an isolated amplifier with a ±250 mV input range and a fixed gain of 8.2, providing a differential analog output. The AMC1304M25DWR outputs a 1-bit bitstream for use with an external digital filter, while the AMC1300BDWVR outputs an analog voltage for direct connection to an ADC.
Are the AMC1304M25DWR and AMC1300BDWVR pin-to-pin compatible?
No. Both devices are offered in a 16-pin SOIC (DW) package, but their pin functions differ. The AMC1304M25DWR includes digital bitstream output pins (DOUT, CLKIN) and an integrated LDO with corresponding pins, whereas the AMC1300BDWVR provides differential analog output pins (VOUTP, VOUTN) and does not integrate an LDO. A direct PCB drop-in replacement is not possible without layout and circuit changes.
Can the AMC1304M25DWR and AMC1300BDWVR be used interchangeably in a current-sensing signal chain?
No. The AMC1304M25DWR requires a digital filter or microcontroller with a suitable sinc filter to reconstruct the measured value from its 1-bit modulator output. The AMC1300BDWVR produces an analog differential output that can be fed directly to an ADC or amplifier. The downstream signal-processing circuitry must match the respective output type, so the two devices are not interchangeable without redesigning the interface.
What are the input voltage ranges of the AMC1304M25DWR and AMC1300BDWVR?
Both devices specify a linear input range of ±250 mV for shunt-resistor-based current sensing. The AMC1304M25DWR is characterized for a ±250 mV input with a specified offset and gain error, while the AMC1300BDWVR also specifies a ±250 mV input range with a fixed gain of 8.2. Designs should confirm the exact recommended operating conditions in the respective manufacturer datasheets.
Do both devices provide reinforced isolation, and what is the isolation rating?
Yes. Both the AMC1304M25DWR and AMC1300BDWVR are isolated devices intended for current-sensing applications requiring galvanic isolation. Both are specified with a reinforced isolation rating of 5 kV RMS per the manufacturer's datasheet, and both are offered in a 16-pin SOIC package. Designers should verify the specific UL/IEC certification details and working voltage ratings in the official datasheets for their end application.
Which device is better suited for a design that already uses a digital filter or FPGA?
The AMC1304M25DWR is generally the better fit when the system already includes a digital filter, FPGA, or microcontroller capable of processing a 1-bit delta-sigma bitstream, because it delivers a modulated digital output and integrates an LDO to simplify the isolated supply. The AMC1300BDWVR is more appropriate when an analog front end or ADC is already present and an analog output is preferred.
What supply voltages do the AMC1304M25DWR and AMC1300BDWVR require?
The AMC1304M25DWR operates from a single 5 V supply on the high side, with an integrated LDO providing the required internal rails, and a 3.3 V or 5 V supply on the low side for the digital interface. The AMC1300BDWVR requires a 5 V supply on the high side and a 3.3 V or 5 V supply on the low side for its analog output stage. Exact recommended operating conditions should be confirmed in the respective datasheets.
Are the AMC1304M25DWR and AMC1300BDWVR suitable for the same motor-drive or inverter applications?
Both are intended for isolated current sensing in motor drives, inverters, and similar power-electronics systems. The choice depends on the signal-chain architecture: the AMC1304M25DWR suits designs using digital demodulation (e.g., with an FPGA or MCU sinc filter), while the AMC1300BDWVR suits designs using an analog-to-digital converter front end. System-level accuracy, latency, and filtering requirements should be evaluated against the manufacturer datasheets before selection.