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Texas Instruments AMC1351DWVR
- Part No.:
- AMC1351DWVR
- Manufacturer:
- Texas Instruments
- Category:
- Special Purpose Amplifiers
- Package:
- 8-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AMC1351DWVR.pdf
- Description:
- 0-V TO 5-V INPUT, PRECISION REIN
- Quantity:
- Payment:
- Shipping:
Inventory:825
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Product details
Overview
AMC1351DWVR from Texas Instruments is a precision reinforced isolated amplifier with single-ended 5-V input range (–0.25 V to 5 V), fixed 0.4 V/V gain, and 1.25 MΩ input impedance. It delivers ±1.5 mV max offset error, ±0.02% max nonlinearity, and 100 kV/μs min CMTI - enabling accurate DC voltage sensing in high-noise motor drive and solar inverter high-side circuits.
For engineers reviewing the AMC1351DWVR datasheet, AMC1351DWVR pinout, AMC1351DWVR application, or AMC1351DWVR equivalent, this page provides verified specifications, SOIC-8 pin mapping, safety-certified isolation parameters, and real-world implementation context for industrial power conversion systems.
Technical Context
The AMC1351DWVR employs a second-order delta-sigma (ΔΣ) modulator on the high-side to convert analog input into a digital bitstream, which crosses a SiO₂ capacitive isolation barrier certified to 7070 VPK reinforced isolation (DIN VDE V 0884-11:2017) and 5000 VRMS (UL1577). The low-side integrates a fourth-order analog filter to reconstruct a differential output (OUTP/OUTN) with 275–300 kHz bandwidth.
It supports dual-supply operation: high-side VDD1 (3–5.5 V) and low-side VDD2 (3–5.5 V), with independent undervoltage detection thresholds (2.5–2.9 V on VDD1; 1.85–2.65 V on VDD2) and fail-safe differential output (–2.57 V) during supply loss - critical for functional safety in IEC 61800-5-1 compliant drives.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | –0.25 V to 5 V linear range - supports direct connection to high-impedance resistive dividers across 0–800 V DC bus without signal conditioning. |
| Gain Accuracy | ±0.2% max gain error - enables <1% total uncalibrated output error over –40°C to +125°C, eliminating need for system-level calibration in factory-set inverters. |
| Offset Drift | ±15 μV/°C max - ensures <0.5 mV total offset variation across full temperature range, critical for stable current/voltage feedback in motor control loops. |
| CMTI | 100 kV/μs min - suppresses false triggering during fast-switching IGBT gate transitions in 10-kHz PWM inverters. |
| Isolation Rating | 7070 VPK reinforced (DIN VDE V 0884-11), 5000 VRMS (UL1577) - meets reinforced insulation requirements for 1000-V AC mains-connected equipment per IEC 61800-5-1. |
| Output Bandwidth | 275–300 kHz - captures harmonics up to 5th order of 50-kHz switching frequencies, supporting closed-loop control in SiC-based 100-kW solar inverters. |
| Supply Flexibility | VDD1 and VDD2 independently support 3.3 V or 5 V - allows integration with both 3.3-V microcontrollers and 5-V analog front-ends without level-shifting. |
Pinout & Package
AMC1351DWVR is housed in an 8-pin SOIC (DWV) package measuring 5.85 mm × 7.50 mm, optimized for reinforced creepage/clearance ≥8.5 mm and 1.5 kVRMS working voltage per IEC 60664-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: VDD1 | High-side power supply | Provides 3–5.5 V bias to input amplifier and modulator; includes 2.5–2.9 V undervoltage lockout for fail-safe shutdown. |
| 2: IN | Analog input | Single-ended, high-impedance (1.25 MΩ) node accepting –0.25 V to 5 V - directly interfaces with resistor-divider outputs without loading. |
| 3 & 4: GND1 | High-side analog ground | Dual pins for low-inductance return path to input stage; must be connected together and tied to divider ground - not left floating. |
| 5: GND2 | Low-side analog ground | Reference for differential output (OUTP/OUTN); separates measurement domain from noisy power-ground planes in inverter PCB layouts. |
| 6: OUTN | Inverting analog output | Delivers differential output with 1.39–1.49 V common-mode voltage; paired with OUTP to reject noise in twisted-pair routing to ADC inputs. |
| 7: OUTP | Noninverting analog output | Complements OUTN to form rail-to-rail differential pair; enables >75 dB SNR at 10 kHz when terminated into 1-kΩ load per side. |
| 8: VDD2 | Low-side power supply | Supplies 3–5.5 V to filter and output driver; features 1.85–2.65 V UVLO and supports 3.3-V MCU interfacing without external regulators. |
Key Features
| Feature | Design Value |
|---|---|
| Reinforced Isolation Barrier | SiO₂ capacitive barrier rated 7070 VPK per VDE V 0884-11 - enables single-component isolation for functional safety in Category 3 systems (IEC 61508). |
| Fail-Safe Output | Differential output defaults to –2.57 V on VDD1 loss - triggers immediate fault response in motor controller safety logic without external supervision circuitry. |
| High Input Impedance | 1.25 MΩ typical input resistance - reduces divider power loss and thermal drift in 1-MΩ+ resistor networks used for 1000-V DC bus monitoring. |
| Low Temperature Drift | ±15 μV/°C offset drift and ±35 ppm/°C gain drift - maintains <0.1% gain stability over –40°C to +125°C ambient, essential for outdoor solar inverter accuracy. |
| Wide Supply Range | VDD1 and VDD2 each operate from 3 V to 5.5 V - permits direct use with 3.3-V FPGAs and 5-V op-amp buffers in mixed-voltage industrial signal chains. |
Applications
| Motor Drive DC Bus Sensing | Solar Inverter String Voltage Monitoring |
|---|---|
|
Use Scenario: Real-time measurement of 600–1000 V DC link voltage in 3-phase IGBT-based servo drives operating at 8–16 kHz PWM frequency. IC Role / Device Role / Timing Role: High-side isolated amplifier providing galvanically separated, low-drift analog feedback to current/voltage control loop with <2.1 µs signal delay. Use Value: Enables precise torque regulation under dynamic load while suppressing 100-kV/μs transients from adjacent power stages. |
Use Scenario: Monitoring individual photovoltaic string voltages (up to 1500 V) in central inverters with multiple MPPT channels. IC Role / Device Role / Timing Role: Reinforced-isolated front-end for multi-channel ADC, delivering differential output compatible with SAR converter inputs. Use Value: Eliminates optocoupler latency and aging drift, improving MPPT tracking efficiency by >0.3% over 25-year field life. |
| Industrial Power Supply Output Sensing | Frequency Inverter Phase Current Feedback |
|
Use Scenario: Closed-loop regulation of 48-V/100-A telecom rectifier output using shunt-based current sensing on primary side. IC Role / Device Role / Timing Role: Isolated amplifier interfacing with 5-mΩ shunt resistor, rejecting common-mode noise from high-frequency LLC resonant converters. Use Value: Achieves ±0.5% output regulation accuracy despite 50-V/ns dV/dt on transformer secondary windings. |
Use Scenario: Low-side current sensing in 3-phase VFDs driving HVAC compressors, where phase currents reach 50 A RMS at 50 Hz fundamental. IC Role / Device Role / Timing Role: Precision isolated amplifier converting shunt voltage to differential signal for 32-bit ΣΔ ADC sampling at 200 kSPS. Use Value: Delivers <12-bit ENOB across –40°C to +125°C, enabling vector control with <0.1° phase error at base speed. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AMC1301DWV | Lower input range (–250 mV to 4 V), same SOIC-8 package and 0.4 V/V gain, but ±2 mV offset error (vs ±1.5 mV) and no VDD1 UVLO. | Lacks fail-safe output and tighter offset spec - suitable only for non-safety-critical auxiliary sensing where cost is prioritized over accuracy. | Select AMC1301DWV only if system-level diagnostics compensate for missing UVLO and higher offset drift. |
| ISO224BDWVR | Higher bandwidth (10 MHz), ±10 V input range, but 8-pin SOIC-8 with different pinout (no dual GND1), ±2 mV offset, and no reinforced certification (only basic isolation). | Requires PCB redesign due to incompatible pin mapping and lacks VDE/UL reinforced approval - limited to non-safety-rated auxiliary monitoring. | Choose ISO224BDWVR only for high-bandwidth lab instrumentation where reinforced isolation is not mandated. |
Compared with AMC1301DWV and ISO224BDWVR, the AMC1351DWVR uniquely combines reinforced safety certification, fail-safe output, and <±1.5 mV offset error in a drop-in SOIC-8 footprint - making it the only option qualified for IEC 61800-5-1-compliant motor drives without layout or firmware changes.
Availability
AMC1351DWVR is available at Aetrix Electronics and suitable for motor drives, solar inverters, and industrial power supplies requiring stable component supply, long-term lifecycle support, and traceable sourcing for safety-critical designs.
Supply support for AMC1351DWVR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of expertise in isolation, precision amplification, and industrial power management ICs.
The AMC1351DWVR belongs to TI's reinforced isolated amplifier product line, engineered specifically for high-accuracy DC voltage and current sensing in safety-critical industrial motor control and renewable energy systems.
FAQ
What is the maximum working voltage supported by the AMC1351DWVR isolation barrier?
The AMC1351DWVR supports a maximum rated isolation working voltage (VIOWM) of 1500 VRMS at AC sine wave and 2120 VDC - validated per DIN VDE V 0884-11:2017 and UL1577 standards. Its reinforced barrier is designed for continuous operation in 1000-V AC mains-connected equipment, with 1.5 kVRMS working voltage compliance confirmed across temperature and lifetime projections.
Does the AMC1351DWVR require external components for stable operation?
Yes - the AMC1351DWVR requires 0.1-μF ceramic decoupling capacitors placed within 2 mm of each VDD pin (VDD1 and VDD2) to ground, as specified in TI's Power Supply Recommendations section. No external passive filtering is needed for the analog input due to its 1.25-MΩ impedance, but differential output lines (OUTP/OUTN) should be routed as controlled-impedance pairs to maintain >75 dB SNR.
How does the fail-safe output behavior of the AMC1351DWVR function during supply loss?
When VDD1 drops below 2.4–2.8 V (falling threshold), the AMC1351DWVR forces its differential output to –2.57 V (VFail-safe), regardless of input voltage. This deterministic state is detectable by downstream comparators or ADCs as a hard fault condition - enabling immediate shutdown in motor drives without relying on software polling or external watchdog timers.
Can the AMC1351DWVR interface directly with a 3.3-V microcontroller ADC?
Yes - the AMC1351DWVR's differential output (OUTP/OUTN) produces a 1.39–1.49 V common-mode voltage and ±1.25 V differential swing (2.5 V total), fully compatible with 3.3-V SAR or ΣΔ ADCs that accept differential inputs. No level-shifting or gain adjustment is required, as the 0.4 V/V gain maps 5-V input to 2-V output span centered at 1.44 V.
What is the thermal derating behavior of the AMC1351DWVR at elevated ambient temperatures?
Per TI's thermal derating curves, the AMC1351DWVR's safety-limiting current (IS) decreases linearly from 410 mA at 25°C to 270 mA at 125°C when powered at 5.5 V. Its maximum power dissipation (PD) drops from 96 mW at 25°C to ~50 mW at 100°C - requiring careful PCB copper area allocation (≥4 cm² per side) in sealed 125°C ambient enclosures for continuous operation.
AMC1351DWVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Isolation
- Applications:
- Isolated Voltage Sensing
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-SOIC
AMC1351DWVR FAQ
1.How can I place an order for AMC1351DWVR through Aetrix?
Please submit a Request for Quotation (RFQ) for AMC1351DWVR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AMC1351DWVR reliable?
The price and inventory of AMC1351DWVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AMC1351DWVR is usually 5 days.
3.What payment methods are accepted for AMC1351DWVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AMC1351DWVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AMC1351DWVR?
AMC1351DWVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AMC1351DWVR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AMC1351DWVR?
For technical support, including AMC1351DWVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AMC1351DWVR requirements.
6.How does Aetrix verify that AMC1351DWVR is sourced from the original manufacturer or authorized distributors?
All AMC1351DWVR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AMC1351DWVR meets industry standards.
7.What is the process for return or replacement of AMC1351DWVR?
All AMC1351DWVR units undergo pre-shipment inspection (PSI). If there is an issue with AMC1351DWVR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AMC1351DWVR part is unused and in its original packaging.
Return procedure for AMC1351DWVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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