Part A
AMC1304M25DWR
Texas Instruments
- Lifecycle
- Active
- Stock
- 2290 Stückzahl
- Package
- SOIC-16
- Series
- Datenerfassung von ADCs-DACs für besonderen Zweck
Replacement verdict
Compatible functional replacement candidate
The AMC1304M25DWR and AMC1300DWV share a common isolated delta-sigma modulator architecture and SOIC-16 wide-body footprint, making them functionally related candidates. However, the AMC1304M25DWR integrates an internal isolated DC-DC converter for high-side power, whereas the AMC1300DWV requires an external isolated supply on the high side. Designers must validate the power architecture, input voltage range, and output interface before substituting one for the other in a given application.
Isolation Architecture
Validation required
Input Voltage Range
Validation required
Package Type
High match
Output Interface
Validation required
Parts at a glance
Part B
AMC1300DWV
Texas Instruments
- Lifecycle
- Active
- Stock
- 5165 Stückzahl
- Package
- SOIC-8
- Series
- Linear-Verstärker
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 | AMC1300DWV | Why it matters |
|---|---|---|---|
| Function / Type | Isolated delta-sigma modulator | Isolated amplifier | Determines the output signal format; a modulator outputs a bitstream requiring digital filtering, while an amplifier outputs an analog voltage, so they are not directly interchangeable. |
| Output Interface | 1-bit delta-sigma bitstream (digital) | Differential analog voltage | The downstream circuitry must match the output type; digital bitstream needs an SDF/filter, analog output needs an ADC. |
| Input Voltage Range | ±250 mV | ±250 mV | Defines the measurable signal span; both target shunt-based current sensing with the same nominal full-scale input. |
| Isolation Rating | 5000 V RMS (reinforced) | 5000 V RMS (reinforced) | Sets the safe working voltage across the isolation barrier for high-voltage systems. |
| Supply Voltage | 3.3 V (high side) / 3.3 V or 5 V (low side) | 3.3 V or 5 V (both sides) | Must match the available rails on each side of the isolation barrier for correct operation. |
| Package | SOIC-16 (wide body) | SOIC-8 (wide body) | Footprint and pin count differ, so PCB layout changes are required when substituting. |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | Confirms suitability for industrial temperature environments. |
| Gain / Sensitivity | Fixed modulator gain (bitstream density) | Fixed gain of 8.2 V/V | Affects signal scaling; the amplifier provides a defined analog gain while the modulator encodes amplitude as bitstream density. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AMC1304M25DWR | AMC1300DWV |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Active | Active |
| Type | Isolated Module | Isolation |
| 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 AMC1300DWV?
The AMC1304M25DWR is a precision, isolated delta-sigma modulator with a ±250 mV input range, designed for direct shunt-resistor current sensing, and it integrates a low-dropout regulator (LDO) on the high side. The AMC1300DWV is an isolated amplifier with a fixed gain of 8.2 and a ±250 mV input range, providing a differential analog output rather than a modulated bitstream. The AMC1304M25DWR outputs a 1-bit sigma-delta data stream for use with an external digital filter, while the AMC1300DWV outputs an analog differential voltage.
Are the AMC1304M25DWR and AMC1300DWV pin-to-pin or package compatible?
No. The AMC1304M25DWR is supplied in an 8-pin SOIC package (DWR suffix, wide-body), while the AMC1300DWV is supplied in an 8-pin SOIC wide-body package (DWV suffix). Although both are 8-pin wide-body SOIC devices, the pin functions differ: the AMC1304M25DWR includes high-side LDO and modulator-specific pins, whereas the AMC1300DWV provides analog output and gain-setting pins. They are not direct drop-in replacements and require separate PCB layouts.
Can the AMC1304M25DWR and AMC1300DWV be used interchangeably in a current-sensing design?
No. The AMC1304M25DWR requires a digital filter (e.g., an FPGA or microcontroller with Sinc filter) to reconstruct the measured value from its 1-bit modulator output, while the AMC1300DWV provides an analog differential output that can be fed directly to an ADC. Substitution would require changes to the signal chain, clocking, and layout, and is not a direct replacement.
What are the input voltage ranges of the AMC1304M25DWR and AMC1300DWV?
Both devices are specified for a linear input range of ±250 mV, intended for shunt-resistor current sensing. The AMC1304M25DWR is a ±250 mV input modulator, and the AMC1300DWV is a ±250 mV input isolated amplifier with a fixed gain of 8.2. Designs must ensure the shunt voltage stays within this range to avoid saturation and nonlinearity.
Do both devices provide reinforced isolation, and what are the isolation ratings?
Yes, both are isolated devices intended for current sensing in high-voltage systems. The AMC1304M25DWR and AMC1300DWV are both specified with reinforced isolation and are rated for a maximum isolation voltage of 5 kV RMS per the manufacturer's datasheet. Designers should verify the specific UL/IEC certification and working voltage ratings in the official datasheet for the target application.
What are the typical supply voltage requirements for the AMC1304M25DWR and AMC1300DWV?
The AMC1304M25DWR operates with a high-side supply (AVDD) of 3.0 V to 5.5 V and a low-side supply (DVDD) of 3.0 V to 5.5 V, with an integrated LDO allowing the high side to be powered from a single supply. The AMC1300DWV requires a high-side supply (VDD1) of 3.0 V to 5.5 V and a low-side supply (VDD2) of 3.0 V to 5.5 V. Both devices are typically used with 5 V or 3.3 V rails, and the exact limits should be confirmed in the datasheet.
Which device is better suited for a design that requires a digital output to an FPGA or microcontroller?
The AMC1304M25DWR is the appropriate choice because it outputs a 1-bit sigma-delta modulated stream that can be processed by a digital filter in an FPGA or microcontroller. The AMC1300DWV provides an analog differential output and would require an external ADC to interface with a digital system, adding components and complexity.
What are the key accuracy specifications to compare between the AMC1304M25DWR and AMC1300DWV?
The AMC1304M25DWR is specified with offset error, gain error, and nonlinearity for its modulator, and its accuracy depends on the external digital filter and reference. The AMC1300DWV is specified with fixed gain error, offset error, and nonlinearity for its analog amplifier. Because the output formats differ (modulated vs. analog), direct accuracy comparison requires accounting for the external filter and ADC in the AMC1304M25DWR signal chain; designers should consult the respective datasheets for the exact offset, gain, and nonlinearity limits.