Part A
AMC1300BDWVR
Texas Dụng cụ
- Lifecycle
- Active
- Stock
- 1306 PCS
- Package
- SOIC-8
- Series
- Linear - Amplifiers - Special Purpose
Replacement verdict
Compatible functional replacement candidate
The AMC1300BDWVR is a viable functional replacement candidate for the AMC1311DWV in isolated voltage-sensing applications, sharing the same isolated amplifier architecture, SOIC-8 package, and 5 V supply rail. However, designers must validate the tighter input voltage range and reduced gain tolerance before committing to a drop-in substitution, as these differences directly affect measurement accuracy and signal headroom.
Input Voltage Range
High match
Gain and Accuracy
Validation required
Package Type
High match
Isolation Rating
High match
Parts at a glance
Part B
AMC1311DWV
Texas Dụng cụ
- Lifecycle
- Active
- Stock
- 6795 PCS
- Package
- SOIC-8
- Series
- Linear - Amplifiers - Special Purpose
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AMC1311DWV | AMC1300BDWVR | Why it matters |
|---|---|---|---|
| Input Signal Type | Voltage input (high-impedance, ±1 V range) | Current shunt / voltage input (±250 mV range) | Determines what physical quantity the isolator measures; a voltage-input part cannot directly replace a shunt-input part without signal conditioning. |
| Input Voltage Range | ±1 V (2 V full-scale) | ±250 mV (500 mV full-scale) | The full-scale input span must match the sensed signal amplitude; mismatched ranges cause clipping or poor resolution. |
| Input Impedance | High impedance (approx. 1 GΩ typical) | Low impedance (approx. 20 kΩ typical) | High input impedance allows direct voltage sensing without loading the source, while low impedance suits shunt-resistor current sensing. |
| Isolation Rating | 5 kV RMS (reinforced, per datasheet) | 5 kV RMS (reinforced, per datasheet) | Isolation rating defines safety and common-mode voltage capability; both meet reinforced isolation but must be verified for the target system. |
| Output Type | Differential analog output | Differential analog output | Both provide differential outputs suitable for driving ADCs, but gain and offset differ, affecting downstream scaling. |
| Gain / Sensitivity | Fixed gain (approx. 1 V/V, output scaled to input range) | Fixed gain (approx. 8 V/V, ±250 mV to ±2 V output) | Gain determines the output-to-input transfer function; different gains require recalibration of the measurement chain. |
| Supply Voltage | 3.0 V to 5.5 V (both sides) | 3.0 V to 5.5 V (both sides) | Supply compatibility ensures the part can operate in the existing rail architecture without additional regulation. |
| Package | SOIC-8 (DWV) | SOIC-8 (DWV) | Package footprint and pinout must match for drop-in board compatibility; both use the same SOIC-8 wide-body package. |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | Industrial temperature range ensures reliable operation across harsh environments; identical ranges ease substitution. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AMC1300BDWVR | AMC1311DWV |
|---|---|---|
| Part Status | Active | Active |
| Type | Isolation | Isolation |
| Applications | Current Sensing, Power Management | - |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the primary functional differences between the AMC1311DWV and the AMC1300BDWVR?
The AMC1311DWV is a precision, isolated voltage-sensing amplifier designed for high-impedance voltage measurements, while the AMC1300BDWVR is an isolated current-sensing amplifier intended for shunt-based current measurement. The AMC1311DWV features a high input impedance (typically 1 GΩ) suitable for direct voltage sensing, whereas the AMC1300BDWVR has a low input impedance (typically 20 kΩ) optimized for shunt resistor interfaces.
Are the AMC1311DWV and AMC1300BDWVR pin-to-pin compatible?
Both devices are offered in the same 8-pin SOIC (DWV) package with identical pinout assignments (VDD1, INP, INN, GND1, VDD2, OUTP, OUTN, GND2). However, pin-to-pin compatibility does not guarantee functional equivalence; the input stage topologies and intended signal domains differ, so direct substitution requires validation against the target application.
What are the input voltage ranges for the AMC1311DWV and AMC1300BDWVR?
The AMC1311DWV is specified for a linear input voltage range of ±1 V (with a full-scale range of ±1 V) and supports a high input impedance for voltage sensing. The AMC1300BDWVR is specified for a linear input voltage range of ±250 mV, which is typical for shunt-based current sensing. These differing input ranges mean the devices are not interchangeable without signal-conditioning adjustments.
Do both devices provide reinforced isolation?
Yes. Both the AMC1311DWV and AMC1300BDWVR are reinforced isolated amplifiers rated for a maximum isolation voltage of 5 kVRMS per UL 1577 and provide reinforced isolation according to VDE 0884-11, making them suitable for high-voltage industrial applications requiring galvanic isolation.
What are the supply voltage requirements for the AMC1311DWV and AMC1300BDWVR?
Both devices operate with 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. The isolated output stage is designed to interface with 3.3 V or 5 V ADCs and digital controllers, allowing flexible system-level integration.
Which device is better suited for motor drive current sensing?
The AMC1300BDWVR is better suited for motor drive current sensing because its ±250 mV input range and low input impedance are optimized for shunt resistor-based phase current measurement. The AMC1311DWV, with its high input impedance and ±1 V range, is intended for voltage sensing such as DC-link or bus voltage monitoring rather than shunt current sensing.
What are the key AC performance specifications for these two amplifiers?
The AMC1311DWV offers a bandwidth of 400 kHz and a typical signal-to-noise ratio (SNR) of 78 dB. The AMC1300BDWVR offers a bandwidth of 400 kHz and a typical SNR of 78 dB. Both devices provide similar dynamic performance, but their input configurations differ, so AC performance should be evaluated in the context of the specific sensing application.
Can the AMC1311DWV and AMC1300BDWVR be used in the same isolated measurement system?
Yes, they can be used together in a system where the AMC1311DWV monitors voltage (e.g., DC-link voltage) and the AMC1300BDWVR monitors current via a shunt. Because both share the same package, pinout, and isolation ratings, they simplify PCB layout and isolation coordination, but each must be configured with its appropriate input network.