Part A
AMC1301DWVR
텍사스 인스트루먼트(주)
- Lifecycle
- Active
- Stock
- 6629 PCS
- Series
- 선형 증폭기 - 계측기, 연산 증폭기, 완충 증폭기
Replacement verdict
Compatible functional replacement candidate
The AMC1304M25DWR and AMC1301DWVR are both isolated delta-sigma modulator families sharing a comparable SOIC-wide footprint and isolated amplification role, but they differ in input structure, clocking, and channel configuration. The AMC1304M25DWR integrates a ±250 mV input with an internal clock and single-channel architecture, while the AMC1301DWVR provides a ±250 mV differential input with an external clock requirement and a fixed gain stage. Designers should validate clocking scheme, input bias network, and channel count against the target application before committing to a substitution.
Input Configuration
Validation required
Clocking Scheme
Validation required
Package Type
High match
Channel Count
Validation required
Parts at a glance
Part B
AMC1304M25DWR
텍사스 인스트루먼트(주)
- Lifecycle
- Active
- Stock
- 2290 PCS
- Package
- SOIC-16
- Series
- 데이터 수집 - ADC DAC- 전용
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 | AMC1301DWVR | Why it matters |
|---|---|---|---|
| Input Type | Current shunt (isolated delta-sigma modulator) | Voltage (isolated amplifier) | Determines whether the device measures current via a shunt or amplifies a voltage signal; these are fundamentally different signal-chain functions and are not directly substitutable. |
| Output Interface | 1-bit digital bitstream (delta-sigma) | Differential analog voltage | The output format dictates the downstream circuitry: a digital modulator needs a digital filter/SINC decoder, while an analog amplifier feeds an ADC directly. |
| Isolation Rating | 5000 V RMS (reinforced) | 5000 V RMS (reinforced) | Both provide reinforced isolation suitable for high-voltage measurement, but the isolation is applied to different signal types, affecting system architecture. |
| Input Voltage Range | ±250 mV (shunt input) | ±250 mV (amplifier input) | The small differential input range suits low-level shunt or sensor signals; matching this range to the sensed signal is critical for accuracy and headroom. |
| Gain | Fixed (modulator, defined by bitstream) | Fixed gain of 8.2 V/V | A defined analog gain scales the input before conversion; the modulator instead encodes the signal digitally, so gain handling differs entirely. |
| Supply Voltage | 3.0 V to 5.5 V (both sides) | 3.0 V to 5.5 V (both sides) | Compatible supply ranges simplify power design, but the two devices still require different surrounding circuitry despite similar rails. |
| Package | SOIC-16 (wide body) | SOIC-8 (wide body) | Different pin counts and footprints mean the parts are not drop-in replacements on an existing PCB layout. |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | Both cover industrial temperature ranges, so thermal suitability is comparable even though the functional roles differ. |
| Typical Application | Motor drive and inverter current sensing | Current/voltage sensing with external ADC | Application fit highlights the architectural difference: one integrates modulation for digital isolation, the other provides an isolated analog front end. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AMC1301DWVR | AMC1304M25DWR |
|---|---|---|
| Part Status | Active | Active |
| Amplifier Type | Isolation | - |
| Number of Circuits | 1 | - |
| Gain Bandwidth Product | 1 MHz | - |
| Current - Input Bias | 60 µA | - |
| Voltage - Input Offset | 50 µV | - |
| Supply Current | 5.9mA | - |
| Current - Output / Channel | 13 mA | - |
| Voltage - Supply Span(Min) | 3 V | - |
| Voltage - Supply Span(Max) | 5.5 V | - |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
| Type | - | Isolated Module |
| 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 |
Frequently asked questions
What are the key architectural differences between the AMC1304M25DWR and the AMC1301DWVR?
The AMC1304M25DWR is a precision isolated delta-sigma modulator with a ±250 mV input range and an integrated low-dropout regulator (LDO) on the isolated side, while the AMC1301DWVR is a fully differential isolated amplifier with a ±250 mV input range and a fixed gain of 8. The AMC1304M25DWR outputs a 1-bit delta-sigma bitstream at 20 MHz, whereas the AMC1301DWVR provides a differential analog output voltage.
Are the AMC1304M25DWR and AMC1301DWVR pin-to-pin compatible?
No. Both devices are offered in a 16-pin SOIC (DW) package, but their pin functions differ. The AMC1304M25DWR includes isolated-side power supply pins for its integrated LDO and a bitstream data output, while the AMC1301DWVR provides differential analog output pins (VOUTP, VOUTN) and does not integrate an isolated-side LDO. The PCB layout and pin connections must be designed specifically for each device.
Can the AMC1304M25DWR directly replace the AMC1301DWVR in an existing design?
No, a direct replacement is not possible without redesign. The AMC1304M25DWR outputs a delta-sigma bitstream requiring a digital filter (e.g., in an FPGA or MCU) to reconstruct the signal, while the AMC1301DWVR outputs an analog differential voltage that can be fed directly to an ADC. The signal chain, pinout, and isolated-side power architecture differ, so the surrounding circuitry must be adapted accordingly.
What are the input voltage ranges of the AMC1304M25DWR and AMC1301DWVR?
Both devices are specified for a linear input range of ±250 mV, making them suitable for shunt-resistor-based current sensing. The AMC1304M25DWR is a ±250 mV input delta-sigma modulator, and the AMC1301DWVR is a ±250 mV input isolated amplifier with a fixed gain of 8.
How do the output interfaces of the AMC1304M25DWR and AMC1301DWVR differ?
The AMC1304M25DWR provides a 1-bit delta-sigma modulated bitstream output at a 20 MHz clock, which must be processed by a digital decimation filter. The AMC1301DWVR provides a differential analog output voltage (with a gain of 8) that can be sampled by an external ADC. This difference determines whether the downstream system requires digital filtering or an analog-to-digital conversion stage.
Do both devices provide reinforced isolation, and what is the isolation rating?
Yes, both the AMC1304M25DWR and AMC1301DWVR are isolated devices intended for current sensing in high-voltage systems. According to Texas Instruments documentation, both are specified with a reinforced isolation rating of 5 kV RMS (per UL 1577) and support working voltages suitable for industrial motor drive and inverter applications. Designers should confirm the exact isolation parameters in the respective datasheets for their end-equipment certification requirements.
Which device is better suited for a design that already uses a digital filter in an MCU or FPGA?
The AMC1304M25DWR is typically the better fit when a digital decimation filter is already available, because its delta-sigma bitstream output can be processed directly by the MCU or FPGA, eliminating the need for an external ADC. The AMC1301DWVR is more appropriate when an analog front end feeding an external ADC is preferred.
What are the supply voltage requirements for the AMC1304M25DWR and AMC1301DWVR?
Both devices use a 5 V nominal supply on the high-side (isolated) and low-side (controller-side) domains, but the AMC1304M25DWR integrates an LDO on the isolated side to generate its internal supply from the isolated 5 V rail, simplifying the isolated power design. The AMC1301DWVR requires the isolated-side supply to be provided externally. Designers should verify the exact recommended operating conditions in the respective TI datasheets.