Part A
AMC1311BDWVR
Texas Instruments
- Lifecycle
- Active
- Stock
- 3122 PCS
- Package
- SOIC-8
- Series
- Amplificateur linéaire - spécial
Replacement verdict
Not a drop-in replacement
The AMC1306M25DWVR and AMC1311BDWVR are both isolated delta-sigma modulators in the same SOIC-8 package, but they are not functionally interchangeable: the AMC1306M25DWVR is a ±250 mV input, 20 MHz clock modulator with a 1-bit Manchester-coded data output, while the AMC1311BDWVR is a ±1 V input, 10 MHz clock modulator with a differential analog output. The differing input range, output format, and clock frequency require circuit and firmware redesign, so substitution is not recommended without full validation.
Different output type
Different input range
Different clock frequency
Firmware redesign required
Parts at a glance
Part B
AMC1306M25DWVR
Texas Instruments
- Lifecycle
- Active
- Stock
- 4162 PCS
- Package
- SOIC-8
- Series
- Acquisition de données - ADC DAC - dédié
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AMC1306M25DWVR | AMC1311BDWVR | Why it matters |
|---|---|---|---|
| Input Signal Type | Current shunt (differential voltage input, ±250 mV) | Voltage (high-impedance resistive divider input, ±1 V) | Determines what physical quantity the device measures; a current-sense amplifier cannot directly replace a voltage-sense amplifier without redesigning the sensing front end. |
| Input Voltage Range | ±250 mV | ±1 V | Sets the maximum measurable signal before clipping; the 4x difference affects scaling, shunt selection, and overall measurement accuracy. |
| Input Impedance | Low (shunt-connected, ~25 kΩ differential) | Very high (1 GΩ typical, for direct high-voltage divider connection) | High input impedance allows direct connection to high-voltage rails via a divider; low impedance requires a shunt and is unsuitable for direct voltage sensing. |
| Isolation Working Voltage | Reinforced isolation, 1 kV RMS working voltage (VDE V 0884-11) | Reinforced isolation, 1 kV RMS working voltage (VDE V 0884-11) | Both provide reinforced isolation suitable for high-voltage systems, so safety ratings are comparable for isolated measurement applications. |
| Output Interface | Digital (1-bit delta-sigma modulator, Manchester-coded bitstream) | Analog differential output (single-ended or differential) | A digital modulator output requires an external digital filter/decoder, while an analog output can feed an ADC directly; the two are not pin- or signal-compatible. |
| Supply Voltage | 3.0 V to 5.5 V (high side), 3.0 V to 5.5 V (low side) | 3.0 V to 5.5 V (high side), 3.0 V to 5.5 V (low side) | Identical supply requirements simplify power-rail design and allow either device to operate from the same isolated supplies. |
| Package | 8-pin SOIC (DW, wide-body) | 8-pin SOIC (DW, wide-body) | Same package and pin count enable drop-in footprint compatibility, though pin functions differ between the two devices. |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | Identical industrial temperature ratings mean both are suitable for the same harsh-environment applications. |
| Typical Application | Motor drive current sensing, shunt-based current measurement | Isolated voltage sensing, DC-link and inverter bus voltage monitoring | The intended measurement function differs fundamentally, so they are not functionally substitutable despite shared isolation and package characteristics. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AMC1311BDWVR | AMC1306M25DWVR |
|---|---|---|
| Part Status | Active | Active |
| Type | Isolation | Isolated Module |
| 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 | - | 2.7V ~ 5.5V |
| Operating Temperature | - | -40°C ~ 125°C |
Frequently asked questions
What are the primary functional differences between the AMC1306M25DWVR and the AMC1311BDWVR?
The AMC1306M25DWVR is a precision isolated delta-sigma modulator designed for current sensing, while the AMC1311BDWVR is an isolated amplifier designed for voltage sensing. The AMC1306M25DWVR outputs a 1-bit bitstream with a ±250 mV input range, whereas the AMC1311BDWVR provides a differential analog output with a ±1 V input range.
Are the AMC1306M25DWVR and AMC1311BDWVR pin-to-pin compatible?
Yes, both devices are offered in the same 8-pin SOIC (DWV) package with identical pinout assignments for VDD1, VDD2, GND1, GND2, and the input/output signal pins. However, pin-to-pin compatibility does not imply functional interchangeability, as the output signal types and input ranges differ.
Can the AMC1306M25DWVR and AMC1311BDWVR be used interchangeably in the same circuit?
No. The AMC1306M25DWVR delivers a digital bitstream output requiring a digital filter (e.g., sinc filter) on the controller side, while the AMC1311BDWVR provides a differential analog output that can be directly sampled by an ADC. The input ranges also differ (±250 mV vs ±1 V), so the signal conditioning and downstream processing must be redesigned for each device.
What are the input voltage ranges of the AMC1306M25DWVR and AMC1311BDWVR?
The AMC1306M25DWVR has a linear input range of ±250 mV (with a full-scale range of ±320 mV), optimized for shunt-based current sensing. The AMC1311BDWVR has a linear input range of ±1 V (with a full-scale range of ±1.25 V), optimized for resistive-divider-based voltage sensing.
What are the output formats of the AMC1306M25DWVR and AMC1311BDWVR?
The AMC1306M25DWVR outputs a 1-bit, 20 MHz delta-sigma modulated bitstream on a single data line. The AMC1311BDWVR outputs a differential analog voltage with a fixed gain of 1 V/V, centered around a common-mode voltage of 1.44 V.
Do both devices provide reinforced isolation?
Yes, both the AMC1306M25DWVR and AMC1311BDWVR are reinforced isolated devices rated for 5 kV RMS isolation per UL 1577 and 1.5 kV peak working voltage per VDE V 0884-11, making them suitable for high-voltage industrial applications requiring reinforced isolation.
What are the typical applications for each device?
The AMC1306M25DWVR is typically used for shunt-based current sensing in motor drives, inverters, and power supplies. The AMC1311BDWVR is typically used for isolated voltage sensing in DC-link monitoring, battery management systems, and grid-tied inverters.
What are the supply voltage requirements for the AMC1306M25DWVR and AMC1311BDWVR?
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 AMC1306M25DWVR is optimized for 5 V operation on both sides, while the AMC1311BDWVR supports 3.3 V or 5 V on either side.