Part A
AMC1300DWVR
Texas Dụng cụ
- Lifecycle
- Active
- Stock
- 1951 PCS
- Package
- SOIC-8
- Series
- Linear - Amplifiers - Special Purpose
Replacement verdict
Compatible functional replacement candidate
The AMC1311BDWV and AMC1300DWVR are both isolated amplifiers in the SOIC-8 (DWV) package with a 1.5 kVrms isolation rating and a ±50 mV input range, making them functionally interchangeable in many isolated shunt-measurement designs. However, the AMC1311BDWV provides a differential output while the AMC1300DWVR provides a single-ended output, so the downstream ADC interface and signal-conditioning network must be validated before substitution.
Input Voltage Range
High match
Isolation Rating
High match
Package Type
High match
Output Type
Validation required
Parts at a glance
Part B
AMC1311BDWV
Texas Dụng cụ
- Lifecycle
- Active
- Stock
- 3238 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 | AMC1311BDWV | AMC1300DWVR | Why it matters |
|---|---|---|---|
| Input Signal Type | Voltage input (high-impedance, ±1 V range) | Current shunt input (low-impedance, ±250 mV range) | Determines whether the device senses a voltage directly or a shunt resistor voltage drop; these are not functionally interchangeable in the same sensing topology. |
| Input Voltage Range | ±1 V (2 V full-scale) | ±250 mV (±250 mV full-scale) | Sets the maximum signal the isolated amplifier can accept; a mismatch requires different front-end scaling and affects resolution and accuracy. |
| 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 is intended for shunt-based current sensing. |
| Isolation Rating | 5 kV RMS (reinforced, per datasheet) | 5 kV RMS (reinforced, per datasheet) | Isolation rating governs safety and common-mode voltage tolerance; both meet reinforced isolation, so this is not a differentiator. |
| Gain | Fixed gain of 1 (unity) | Fixed gain of 8 | Gain determines output scaling relative to input; different gains require different downstream ADC scaling and signal conditioning. |
| Output Type | Differential analog output | Differential analog output | Both provide differential outputs suitable for driving delta-sigma ADCs, so output interface compatibility is maintained. |
| Supply Voltage | 3.0 V to 5.5 V (high side and low side) | 3.0 V to 5.5 V (high side and low side) | Supply range affects compatibility with system rails; identical ranges mean the same power supply design can be reused. |
| Package | 8-pin SOIC (DWV) | 8-pin SOIC (DWV) | Package and pinout affect PCB layout and drop-in compatibility; identical packages simplify substitution at the board level. |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | Temperature range determines suitability for industrial environments; identical ranges mean equivalent thermal robustness. |
| Typical Application | Isolated voltage sensing (e.g., DC-link, battery voltage) | Isolated current sensing via shunt resistor (e.g., motor drive, inverter) | The intended sensing function differs, so these parts are not direct substitutes despite sharing package and isolation ratings. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AMC1300DWVR | AMC1311BDWV |
|---|---|---|
| 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 AMC1311BDWV and AMC1300DWVR?
The AMC1311BDWV is a precision, isolated voltage amplifier designed for voltage sensing applications, featuring a high input impedance of 1 GΩ and a fixed gain of 1 V/V. The AMC1300DWVR is an isolated amplifier optimized for current sensing, typically used with shunt resistors, featuring a low input impedance and a fixed gain of 8.2 V/V. The AMC1311BDWV is intended for high-voltage voltage measurement, while the AMC1300DWVR is intended for current measurement across a shunt.
Are the AMC1311BDWV and AMC1300DWVR pin-to-pin compatible?
Yes, both devices are offered in the same 8-pin SOIC (DWV) package with identical pinout assignments for the primary and secondary sides, including VDD1, VDD2, GND1, GND2, INP, INN, OUTP, and OUTN. However, pin-to-pin compatibility does not imply functional interchangeability; the input structures and gains differ significantly.
Can the AMC1311BDWV be used as a direct drop-in replacement for the AMC1300DWVR in a current-sensing circuit?
No. The AMC1311BDWV has a gain of 1 V/V and a high-impedance input intended for voltage sensing, whereas the AMC1300DWVR has a gain of 8.2 V/V and a low-impedance input intended for shunt-based current sensing. Substituting one for the other without redesigning the input network and recalibrating the signal chain will produce incorrect output scaling and may not meet the intended measurement accuracy.
What are the input voltage ranges of the AMC1311BDWV and AMC1300DWVR?
The AMC1311BDWV is specified for a linear input voltage range of ±1 V (with a full-scale range of ±1 V) at a gain of 1 V/V. The AMC1300DWVR is specified for a linear input voltage range of ±250 mV at a gain of 8.2 V/V, corresponding to a differential input span suitable for shunt resistor voltage drops. These ranges are not interchangeable without external signal conditioning.
Do both devices provide the same isolation rating?
Both the AMC1311BDWV and AMC1300DWVR are reinforced isolated amplifiers rated for 5 kV RMS isolation per UL 1577 and provide basic isolation according to IEC 60747-17, with a maximum working isolation voltage of 1.5 kV peak. Designers should still verify the specific isolation parameters in the respective datasheets for the target application's safety requirements.
What are the supply voltage requirements for the AMC1311BDWV and AMC1300DWVR?
Both devices operate with a primary-side supply (VDD1) of 3.0 V to 5.5 V and a secondary-side supply (VDD2) of 3.0 V to 5.5 V. The isolated output is ratiometric to the secondary supply, so VDD2 stability directly affects output accuracy in both parts.
Which device is better suited for high-voltage DC bus voltage monitoring?
The AMC1311BDWV is the appropriate choice for high-voltage DC bus voltage monitoring because its high input impedance (1 GΩ) and unity gain allow direct connection to a high-value resistive divider without significant loading error. The AMC1300DWVR's low input impedance and 8.2 V/V gain make it unsuitable for direct voltage sensing without additional signal conditioning.
Which device is better suited for motor phase current sensing with a shunt resistor?
The AMC1300DWVR is intended for shunt-based current sensing because its ±250 mV input range and 8.2 V/V gain match the low-level differential voltage developed across a shunt resistor, providing improved signal-to-noise ratio before the isolation barrier. The AMC1311BDWV's ±1 V input range and unity gain are not optimized for this purpose.