Part A
AMC1302DWVR
STマイクロエレクトロニクス
- Lifecycle
- Active
- Stock
- 4875 個数
- Package
- SOIC-8
- Series
- リニアアンプ - 特殊用途
Replacement verdict
Not a drop-in replacement
The AMC1305M25DWR and AMC1302DWVR are both isolated delta-sigma modulators, but they differ fundamentally in output interface, input voltage range, isolation rating, and package footprint, so neither part can directly substitute for the other without circuit redesign and validation.
Different output interface
Different input voltage range
Different isolation rating
Different package footprint
Parts at a glance
Part B
AMC1305M25DWR
STマイクロエレクトロニクス
- Lifecycle
- Active
- Stock
- 3118 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 | AMC1305M25DWR | AMC1302DWVR | Why it matters |
|---|---|---|---|
| Input Type | Current shunt (isolated delta-sigma modulator) | Current shunt (isolated amplifier) | The AMC1305M25 is a modulator that outputs a bitstream, while the AMC1302 is a linear isolated amplifier with an analog output; they are not functionally interchangeable without changing the downstream interface. |
| Output Format | 1-bit delta-sigma bitstream | Differential analog voltage | A bitstream requires a digital filter/SINC stage in an MCU or FPGA, whereas an analog output can feed an ADC directly; this fundamentally changes the system architecture. |
| Isolation Rating | 5000 V RMS (reinforced) | 5000 V RMS (reinforced) | Both provide reinforced isolation suitable for high-voltage current sensing, so safety isolation capability is equivalent. |
| Input Voltage Range | ±250 mV | ±50 mV | The narrower ±50 mV range of the AMC1302 suits smaller shunt drops, while the ±250 mV range of the AMC1305M25 accommodates larger shunt signals; this affects shunt selection and gain. |
| Gain | Fixed (modulator, defined by bitstream scaling) | 41 (fixed) | The AMC1302 provides a defined analog gain of 41, while the modulator's effective scaling depends on the digital filter; gain behavior differs significantly. |
| Supply Voltage | 3.3 V or 5 V (high side), 3.3 V or 5 V (low side) | 3.3 V or 5 V (high side), 3.3 V or 5 V (low side) | Both support flexible 3.3 V/5 V supplies on either side, so power supply compatibility is comparable. |
| Package | SOIC-16 (wide body) | SOIC-8 (wide body) | Different package footprints and pin counts mean the two parts are not drop-in replacements on an existing PCB. |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | Both cover the industrial temperature range, so environmental robustness is equivalent. |
| Bandwidth | Up to ~20 MHz clock (modulator) | ~100 kHz (analog) | The modulator supports much higher effective sampling bandwidth via its clock, while the analog amplifier bandwidth is limited; this affects achievable measurement speed and control loop response. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AMC1302DWVR | AMC1305M25DWR |
|---|---|---|
| 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 | - | Analog and Digital |
| Voltage - Supply | - | 3V ~ 5.5V |
| Operating Temperature | - | -40°C ~ 125°C |
Frequently asked questions
What are the primary functional differences between the AMC1305M25DWR and the AMC1302DWVR?
The AMC1305M25DWR is a reinforced isolated delta-sigma modulator with a ±250-mV input range and a 20-MHz clock, designed for isolated current and voltage sensing with a bit-stream output. The AMC1302DWVR is an isolated amplifier with a ±50-mV input range and a fixed gain of 41, providing a differential analog output. The AMC1305M25DWR outputs a 1-bit delta-sigma stream, while the AMC1302DWVR outputs an analog voltage, so they are not functionally interchangeable.
Are the AMC1305M25DWR and AMC1302DWVR pin-to-pin compatible?
No. Both devices are offered in an 8-pin SOIC (D) package, but their pin functions differ. The AMC1305M25DWR provides a clock input and a data output for the delta-sigma bit stream, whereas the AMC1302DWVR provides an analog differential output and does not have a clock input. The pinouts are therefore not directly interchangeable.
What input voltage range does each device support?
The AMC1305M25DWR supports a linear input range of ±250 mV, while the AMC1302DWVR supports a linear input range of ±50 mV. The AMC1302DWVR's smaller input range is paired with a fixed gain of 41 to produce a differential output of ±2.05 V, whereas the AMC1305M25DWR digitizes its ±250-mV input directly into a delta-sigma bit stream.
What isolation rating do the AMC1305M25DWR and AMC1302DWVR provide?
Both devices are reinforced isolated amplifiers/modulators rated for 5-kV RMS isolation per UL 1577 and provide reinforced isolation according to VDE V 0884-11. They are intended for isolated current and voltage sensing in industrial and motor-drive applications where reinforced isolation is required.
What output interface does each device provide to the system controller?
The AMC1305M25DWR provides a 1-bit delta-sigma modulated bit stream that must be processed by a digital filter or modulator interface (such as an MCU or FPGA with a sinc filter) to reconstruct the sampled signal. The AMC1302DWVR provides a differential analog output that can be fed directly into an ADC or an analog control loop. The choice depends on whether the system architecture is digital (bit-stream) or analog.
Can the AMC1302DWVR be used as a drop-in replacement for the AMC1305M25DWR in an existing design?
No. Because the AMC1305M25DWR outputs a delta-sigma bit stream and requires an external clock, while the AMC1302DWVR outputs an analog differential voltage, the downstream signal chain, clocking, and PCB layout would need to be redesigned. A direct drop-in replacement is not possible without validating the entire signal path against the manufacturer datasheets.
What are the typical applications for each device?
The AMC1305M25DWR is typically used for isolated shunt-based current sensing in motor drives, inverters, and battery management systems where a digital bit-stream output is preferred. The AMC1302DWVR is typically used for isolated current sensing in motor control, servo drives, and power inverters where an analog output is required by the downstream ADC or controller.