Part A
AMC1311BDWV
Texas Instruments
- Lifecycle
- Active
- Stock
- 3238 PCS
- Package
- SOIC-8
- Series
- Linear - Amplifiers - Special Purpose
Replacement verdict
Not a drop-in replacement
The AMC1306M25DWVR and AMC1311BDWV are not drop-in replacements for one another. Although both are isolated delta-sigma modulators in the same SOIC-8 (DWV) package, they differ fundamentally in input architecture, output format, and intended signal chain. The AMC1306M25DWVR is a ±250 mV shunt-current modulator with a 1-bit Manchester-coded bitstream output, while the AMC1311BDWV is a ±1 V high-impedance voltage-input modulator with a single-ended analog output. Substitution requires redesign of the input front end, digital interface, and downstream filtering, so the parts should be treated as functionally distinct rather than interchangeable.
Different input architecture
Different output type
Different input voltage range
Different signal chain role
Parts at a glance
Part B
AMC1306M25DWVR
Texas Instruments
- Lifecycle
- Active
- Stock
- 4162 PCS
- Package
- SOIC-8
- Series
- Acquisição de dados - ADCs-DACs - Objetivo Especial
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 | AMC1311BDWV | Why it matters |
|---|---|---|---|
| Input Type | Current (shunt-based, differential) | Voltage (high-impedance, differential) | Determines the physical quantity being measured; a current-sense amplifier cannot directly replace a voltage-sense amplifier in the same circuit. |
| Input Voltage Range | ±250 mV | ±1 V (2 V full-scale) | Defines the maximum signal the device can accept; mismatched ranges require different shunt or divider networks and affect measurement resolution. |
| Output Format | Digital (1-bit sigma-delta, CMOS) | Analog differential (single-ended output) | Digital output requires an external digital filter/decoder, while analog output feeds an ADC directly; the downstream signal chain differs fundamentally. |
| Isolation Rating | 5000 V RMS (reinforced) | 5000 V RMS (reinforced) | Both provide reinforced isolation, so safety isolation capability is equivalent and not a differentiator for substitutability. |
| 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 mean the same power rails can be reused, simplifying board-level substitution. |
| Bandwidth | 20 MHz (clock), signal bandwidth ~1 MHz | ~100 kHz (typical) | Bandwidth affects the ability to capture fast transients; the digital modulator supports much higher effective bandwidth than the analog amplifier. |
| Package | SOIC-8 (DW, 7.5 mm body) | SOIC-8 (DWV, 7.5 mm body) | Package footprint and creepage/clearance affect PCB layout and isolation spacing; both share the same SOIC-8 outline but differ in specific isolation dimensions. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Identical temperature ratings mean both suit the same industrial environments without derating differences. |
| Gain / Transfer Function | Fixed gain (modulator, ±250 mV input) | Fixed gain of 1 (unity, ±1 V input) | The transfer function determines how input maps to output; different scaling requires recalibration of the measurement system. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AMC1311BDWV | 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 AMC1311BDWV?
The AMC1306M25DWVR is a precision isolated delta-sigma modulator with a ±250 mV input range, designed for current sensing across shunts. The AMC1311BDWV is an isolated amplifier with a ±1 V input range, designed for voltage sensing. The AMC1306M25DWVR outputs a 1-bit delta-sigma bitstream, while the AMC1311BDWV provides a differential analog output.
Are the AMC1306M25DWVR and AMC1311BDWV pin-to-pin compatible?
Yes, both devices are offered in the same 8-pin SOIC (DWV) package with the same pin count and footprint. However, pin functions differ: the AMC1306M25DWVR provides a clock input and a data output, whereas the AMC1311BDWV provides an analog output and does not require an external clock. Direct substitution requires verifying the surrounding circuit configuration.
What are the input voltage ranges of the AMC1306M25DWVR and AMC1311BDWV?
The AMC1306M25DWVR has a specified input voltage range of ±250 mV, optimized for shunt-based current sensing. The AMC1311BDWV has a specified input voltage range of ±1 V, optimized for isolated voltage sensing. The input ranges are not interchangeable without external signal conditioning.
Do both devices provide reinforced isolation?
Yes, both the AMC1306M25DWVR and the AMC1311BDWV are reinforced isolated devices rated for 5 kV RMS isolation per the respective Texas Instruments datasheets. Both are suitable for isolated signal acquisition in high-voltage systems where reinforced isolation is required.
What output interface does each device provide to the host controller?
The AMC1306M25DWVR provides a 1-bit delta-sigma modulated bitstream output that must be processed by a digital filter or modulator interface on the host controller. The AMC1311BDWV provides a differential analog output that must be digitized by an external ADC. The host-side interface requirements therefore differ significantly between the two devices.
Can the AMC1306M25DWVR and AMC1311BDWV be used in the same application interchangeably?
No, they are not functionally interchangeable. The AMC1306M25DWVR is intended for current sensing with a delta-sigma digital output, while the AMC1311BDWV is intended for voltage sensing with an analog output. Substitution would require redesigning the signal chain, including the host interface and signal conditioning, and must be validated against the respective datasheets.
What are the typical supply voltage requirements for these devices?
Both the AMC1306M25DWVR and the AMC1311BDWV operate with a high-side supply (AVDD) of 3.0 V to 5.5 V and a low-side supply (DVDD) of 3.0 V to 5.5 V, per the Texas Instruments datasheets. The isolated supplies must be provided on both sides of the isolation barrier for proper operation.