AMC0302D - ±50mV Reinforced Isolated Amplifier | Texas Instruments
MPN: AMC0302D ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.95 | $3.95 |
| 10 | $3.55 | $35.50 |
| 100 | $3.16 | $316.00 |
| 500 | $2.84 | $1,420.00 |
| 1,000 | $2.53 | $2,530.00 |
Drop-in alternatives for AMC0302D — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
AMC0302DD
✅ Drop-In📋 Reference alternative (not in catalog)
AMC0202D
✅ Drop-In✓ In Stock
$1.85 / Unit
View Datasheet →AMC0380D
✅ Drop-In✓ In Stock
$4.48 / Unit
View Datasheet →AMC1302DWVR
✅ Drop-In📋 Reference alternative (not in catalog)
HCPL-7860
⚡ Same Package📋 Reference alternative (not in catalog)
AMC0302D Maximum Ratings & Electrical Characteristics
| Input Voltage Range (Linear) | ±50 mV |
| Fixed Gain | 8.2 V/V |
| Bandwidth | 250 kHz |
| Output Type | Differential |
| Offset Error (Max) | ±0.3 mV |
| Gain Error (Max) | ±0.2% |
| Offset Drift | ±5 uV/C |
| High-Side Supply Voltage | 3.3 V or 5 V |
| Low-Side Supply Voltage | 3.3 V or 5 V |
| Isolation Rating (DWV Package) | 5 kVRMS (60 s), reinforced |
| Isolation Rating (D Package) | 3 kVRMS (60 s), basic |
| Isolation Barrier Type | Capacitive coupling |
| Architecture | Sigma-delta modulator with internal reference |
| Operating Temperature | -40C to +125C |
| Package | SOIC-8, wide-body (DWV) and narrow-body (D) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
AMC0302D Pin Configuration
| Pin 1 | VDD1 — High-side supply, 3.3V or 5V |
| Pin 2 | INP — Non-inverting input from shunt (high-side) |
| Pin 3 | INN — Inverting input from shunt (high-side) |
| Pin 4 | GND1 — High-side ground |
| Pin 5 | GND2 — Low-side ground |
| Pin 6 | OUTN — Inverted differential output (low-side) |
| Pin 7 | OUTP — Non-inverted differential output (low-side) |
| Pin 8 | VDD2 — Low-side supply, 3.3V or 5V |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
AMC0302D is suitable for 6 applications: Motor Phase Current Sensing, Solar Inverter Current Monitoring, Battery Management Systems, UPS and AC Power Monitoring, Industrial PLC Analog Input Modules, Electric Vehicle Traction Inverter.
Motor Phase Current Sensing
In variable frequency drives and servo drives, the AMC0302D measures phase current via a low-value shunt in the inverter leg. Its ±50mV linear range and 8.2 V/V gain produce a ±410mV differential signal suited to 3.3V ADCs, while the 250kHz bandwidth captures PWM ripple for accurate torque and ripple-current control. The 5kVRMS reinforced isolation (DWV package) withstands DC-bus transients, and the differential output rejects ground shifts between the power stage and controller, eliminating common-mode errors that plague non-isolated shunt amplifiers.
Recommended
Solar Inverter Current Monitoring
Grid-tied solar inverters require isolated DC-link and MPPT current measurement. The AMC0302D senses shunt voltage on the high-voltage DC bus and transmits a ground-shift-insensitive differential signal to the low-voltage control side. Its ±0.3mV offset and ±5uV/C drift keep measurement error low across outdoor -40C to +125C temperature swings, supporting MPPT efficiency. The capacitive isolation barrier resists magnetic interference from nearby power inductors, and the 250kHz bandwidth supports both control-loop feedback and arc-fault or residual-current detection algorithms.
Recommended
Battery Management Systems
In EV and stationary BMS, precise pack current measurement drives state-of-charge estimation. The AMC0302D's ±0.2% gain error and ±0.3mV offset allow coulomb counting with small shunts, reducing conduction losses in high-current paths. Reinforced 5kVRMS isolation (DWV) satisfies safety separation between the HV pack and the low-voltage CAN domain. The internal reference and sigma-delta architecture ensure stable readings across -40C to +125C, and the differential output tolerates the large ground offsets typical of traction-battery installations.
Recommended
UPS and AC Power Monitoring
Uninterruptible power supplies use the AMC0302D to measure inverter output and battery charge current with isolation from the mains-referenced circuitry. The 250kHz bandwidth tracks inverter switching transients for protection circuits, while the low offset drift keeps idle-current readings accurate for energy reporting. Because the output is differential and insensitive to ground shifts, the signal can be routed several centimeters to the DSP controller without noise pickup. Designers should filter the input with a small RC network to limit shunt thermal EMF and high-frequency aliasing.
Recommended
Industrial PLC Analog Input Modules
Isolated analog input cards in PLC systems use the AMC0302D to bring shunt- or sensor-derived signals from field potentials into the backplane safely. The reinforced isolation rating supports card-level safety certification, while ±0.2% gain error meets typical 12-bit measurement class requirements without per-channel calibration. The differential output connects directly to a delta-sigma ADC such as the ADS131M08 on the controller side. Capacitive barrier technology provides high immunity to the electrically noisy environment of motor cabinets and switchgear.
Recommended
Electric Vehicle Traction Inverter
Traction inverters demand functional-safety-grade isolated current feedback for torque control and overcurrent protection. The AMC0302D provides ±50mV shunt measurement with reinforced 5kVRMS isolation and specified behavior over the full automotive -40C to +125C range. Its low latency sigma-delta path supports fast phase-current sampling in field-oriented control loops running at 10-20kHz PWM. Compared with hall-effect sensing, the shunt-based approach avoids magnetic offset drift and cross-talk between the three phase channels.
Recommended
Recommended Products Summary
Engineering reference data for AMC0302D — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AMC0302DD | AMC0202D | AMC0380D | HCPL-7860 |
|---|---|---|---|---|---|
| Package | SOIC-8 (DWV wide-body / D narrow-body) | SOIC-8 (D, narrow-body) - same pinout | SOIC-8 (DWV/D) - same pinout | SOIC-8 (DWV/D) - same pinout | SOIC-8 - different pinout |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Broadcom |
| Input Voltage Range | ±50 mV | ±50 mV | ±50 mV | ±125 mV | [DATA_NEEDED] |
| Fixed Gain | 8.2 V/V | 8.2 V/V | 8.2 V/V | 8.2 V/V | [DATA_NEEDED] |
| Isolation Rating (60 s) | 5 kVRMS reinforced (DWV) | 3 kVRMS basic | 5 kVRMS reinforced (DWV) | 5 kVRMS reinforced (DWV) | [DATA_NEEDED] |
| Offset Error | ±0.3 mV (max) | ±0.3 mV | higher (standard accuracy) | [DATA_NEEDED] | [DATA_NEEDED] |
| Bandwidth | 250 kHz | 250 kHz | 250 kHz | 250 kHz | [DATA_NEEDED] |
| Operating Temperature | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C | [DATA_NEEDED] |
Key Differentiators
- Precision accuracy class (vs AMC0202D)
- Wider input headroom option in same footprint (vs AMC0380D)
- Reinforced safety isolation (vs AMC0302DD)
Design Notes
Maintain TI-specified creepage and clearance across the isolation barrier per the AMC0x02D datasheet. Keep the high-side (GND1) and low-side (GND2) ground planes fully separated, and do not route high-voltage traces beneath the SOIC-8 package. For reinforced isolation applications (DWV package), consider slotting the PCB under the device to increase creepage distance in polluted or humid environments, and verify the board material's CTI rating supports the required isolation class.
Decouple both VDD1 and VDD2 with 0.1uF ceramic capacitors placed as close to the supply pins as possible, each with a low-impedance return to its own ground. High-side decoupling is especially important because the sigma-delta modulator draws dynamic current at the sampling clock rate; insufficient decoupling manifests as output glitches. Both supplies may be 3.3V or 5V; ensure the low-side supply is clean since the differential output common-mode and swing scale with VDD2.
Use a differential low-pass filter at OUTP/OUTN before the ADC input, typically an RC filter with cutoff set between 100kHz and the ADC sampling rate, to reject modulation noise outside the 250kHz signal bandwidth. Route OUTP and OUTN as a matched differential pair on the low-side, away from switching nodes. Keep shunt sense traces (INP/INN) as a Kelvin connection directly at the shunt terminals to avoid parasitic resistance errors.
Do not exceed the ±50mV linear input range - signals beyond the range clip the output and corrupt current readings during inrush or fault events; size the shunt so maximum fault current stays within range or add clamping. Avoid using the AMC0302DD (narrow-body, 3kVRMS basic isolation) where safety standards require reinforced isolation; only the DWV wide-body package carries the 5kVRMS reinforced rating.
Compliance Information
RoHS compliance per TI product page. For detailed REACH and AEC-Q100 qualification status, consult the TI product page and quality documentation for the specific ordering part (e.g., AMC0302DDWVR).
