Part A
AMC1300DWVR
STマイクロエレクトロニクス
- Lifecycle
- Active
- Stock
- 1951 個数
- Package
- SOIC-8
- Series
- リニアアンプ - 特殊用途
Replacement verdict
Not a drop-in replacement
The AMC1304M25DWR and AMC1300DWVR are not drop-in replacements for one another. Although both are isolated delta-sigma modulator devices in the SOIC-16 (DW) package, they differ in input architecture, clocking scheme, and output interface, so the AMC1300DWVR cannot be substituted directly for the AMC1304M25DWR without circuit redesign and validation.
Different input architecture
Different clocking scheme
Different output interface
Different isolation rating
Parts at a glance
Part B
AMC1304M25DWR
STマイクロエレクトロニクス
- Lifecycle
- Active
- Stock
- 2290 個数
- Package
- SOIC-16
- Series
- データ取得 - ADC/DAC - 特殊用途向け
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 | AMC1300DWVR | Why it matters |
|---|---|---|---|
| Function / Type | Isolated delta-sigma modulator with integrated DC-DC converter | Isolated amplifier (linear isolation amplifier) | These are fundamentally different device classes; a modulator outputs a bitstream requiring digital filtering, while an amplifier outputs an analog voltage, so they are not functionally interchangeable. |
| Output Signal | 1-bit delta-sigma bitstream | Differential analog voltage | The downstream interface (digital filter/FPGA vs. ADC or analog stage) must match the output type, which differs completely between the two parts. |
| Isolation Rating | 5000 V RMS (reinforced) | 5000 V RMS (reinforced) | Both provide reinforced isolation suitable for high-voltage sensing, so isolation capability is comparable and not a differentiator. |
| Input Voltage Range | ±250 mV (fixed, optimized for shunt sensing) | ±250 mV (fixed, optimized for shunt sensing) | Both target low-level shunt-resistor sensing with the same input range, so signal-level compatibility is similar. |
| Integrated Isolated Power | Yes (integrated DC-DC converter) | No (requires external isolated supply) | The AMC1304M25DWR can power its high side internally, simplifying design, whereas the AMC1300DWVR needs an external isolated supply on the high side. |
| Supply Voltage (High Side) | 3.0 V to 5.5 V (internally generated) | 3.0 V to 5.5 V (externally supplied) | Both operate over a similar high-side supply range, but the source of that supply differs, affecting board-level power design. |
| Package | SOIC-16 (wide body) | SOIC-8 (wide body) | Different package footprints and pin counts mean the parts are not drop-in compatible on an existing PCB layout. |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | Both cover the same industrial temperature range, so thermal suitability is equivalent. |
| Typical Application | Motor drive current sensing, isolated shunt measurement with digital output | Motor drive current sensing, isolated shunt measurement with analog output | Both target isolated shunt current sensing, but the output format dictates the surrounding signal chain and cannot be substituted directly. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AMC1300DWVR | 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 AMC1300DWVR?
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 AMC1300DWVR 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 digital bitstream, while the AMC1300DWVR outputs an analog voltage, so they serve different signal-chain architectures.
Are the AMC1304M25DWR and AMC1300DWVR pin-to-pin or package compatible?
No. The AMC1304M25DWR is supplied in a 16-pin SOIC (DWR) package, while the AMC1300DWVR is supplied in an 8-pin SOIC (DWV) package. The pin counts, pin functions, and package body dimensions differ, so they are not drop-in replacements and require different PCB land patterns.
What isolation rating do the AMC1304M25DWR and AMC1300DWVR provide?
Both devices are reinforced isolated components rated for 5000 VRMS isolation per UL 1577 and provide a working voltage of 1500 VDC per VDE V 0884-11 (VDE 0884-11) reinforced isolation. Designers should confirm the specific certification and working-voltage limits in the respective manufacturer datasheets for the target application.
Can the AMC1304M25DWR and AMC1300DWVR be used for the same current-sensing application?
Both target shunt-based current sensing with a ±250 mV input range, but they are not interchangeable without redesign. The AMC1304M25DWR requires a digital filter or modulator demodulator (e.g., an FPGA or a sigma-delta filter) to reconstruct the signal, whereas the AMC1300DWVR provides an analog output that can be fed directly to an ADC or comparator. The choice depends on whether the system architecture is digital-isolator or analog-isolator based.
What are the typical supply voltage requirements for each device?
The AMC1304M25DWR operates from a single 3.0 V to 5.5 V supply on the high side (with an integrated LDO for the isolated side) and 3.0 V to 5.5 V on the low side. The AMC1300DWVR requires a 3.0 V to 5.5 V supply on the high side and a 3.0 V to 5.5 V supply on the low side. Exact recommended operating conditions should be verified in the manufacturer datasheets.
Which device is better suited for high-precision motor-drive current sensing?
The AMC1304M25DWR is typically preferred in motor-drive designs that use digital sigma-delta filtering because its 1-bit modulator output supports high-resolution, low-latency current reconstruction when paired with an appropriate digital filter. The AMC1300DWVR is suited to designs that require a simple analog isolated amplifier output feeding an external ADC. Selection depends on the system's signal-chain and filtering architecture rather than a single precision metric.
Do the AMC1304M25DWR and AMC1300DWVR share the same input common-mode and offset specifications?
No. Although both have a ±250 mV input range, their input common-mode voltage ranges, offset error, gain error, and nonlinearity specifications differ. The AMC1304M25DWR is specified as a modulator with parameters such as offset error and gain error in the digital domain, while the AMC1300DWVR is specified as an amplifier with gain error and offset referred to its analog output. Designers must consult each datasheet for the exact limits.
What clock or output interface does each device require?
The AMC1304M25DWR requires an external clock (typically 5 MHz to 20 MHz) and outputs a 1-bit sigma-delta bitstream on a single data line. The AMC1300DWVR requires no external clock and provides a differential analog output voltage proportional to the input. This difference is a key factor in system partitioning and digital filter requirements.