Texas Instruments AMC1200BDWV

Overview

AMC1200BDWV from Texas Instruments is a fully-differential isolation amplifier with silicon dioxide (SiO₂) capacitive barrier, optimized for shunt-based current sensing in high-voltage motor control and inverter systems. It delivers ±250-mV input range, 8× fixed gain (±0.5% accuracy), 108 dB CMRR at DC, 60 kHz minimum bandwidth, and 4250 V_PEAK certified galvanic isolation per UL1577 and VDE V 0884-10.

For engineers reviewing the AMC1200BDWV datasheet, AMC1200BDWV pinout, AMC1200BDWV application, or AMC1200BDWV equivalent, this page provides verified technical context, SOIC-8 (DWV) package mapping, differential output interface details, and validated alternatives for industrial current sensing designs requiring high common-mode transient immunity (≥10 kV/µs) and extended temperature operation (–40°C to 105°C).

Technical Context

The AMC1200BDWV implements a second-order delta-sigma modulator on the high-side, digitizing the ±250-mV differential analog input against a 2.5-V internal reference, then transmitting the bitstream across a SiO₂ isolation barrier. Its low-side stage includes a third-order active low-pass filter and output buffer delivering a fully differential analog output (VOUTP/VOUTN) with nominal gain of 8.

Input common-mode voltage range spans –0.16 V to VDD1; output common-mode voltage self-adjusts to either 1.29 V (at 3.3-V VDD2) or 2.55 V (at 5-V VDD2). The device operates with independent 4.5–5.5 V high-side (VDD1/GND1) and 2.7–5.5 V low-side (VDD2/GND2) supplies, enabling system-level ground separation and noise rejection in high dV/dt environments.

Key Specifications

Pinout & Package

AMC1200BDWV is housed in an 8-pin wide-body SOIC package (DWV), 7.50 mm × 5.85 mm body size, with creepage/clearance ≥8 mm and CTI ≥400 V per IEC 60664-1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar isolation amplifier applications.

Compared with AMC1200BDWV, AMC1301SDWV offers superior dynamic performance and long-term stability but demands more careful filtering design; ISO124U provides lower-cost isolation at the expense of bandwidth, CMTI, and safety certification - making AMC1200BDWV the optimal balance of precision, robustness, and qualification for modern inverter-grade current sensing.

Availability

AMC1200BDWV is available at Aetrix Electronics and suitable for motor control, green energy inverters, and uninterruptible power supplies requiring stable component supply, long-lifecycle support, and traceable sourcing for industrial OEM programs.

Supply support for AMC1200BDWV 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, embedded processing, and high-reliability components for industrial, automotive, and communications markets.

The AMC1200B product line delivers reinforced isolation amplifiers engineered for precision current sensing in high-voltage power conversion systems - emphasizing low offset drift, high CMTI, and regulatory compliance for functional safety applications.

FAQ

What is the isolation rating of the AMC1200BDWV?

The AMC1200BDWV is certified for 4250 V_PEAK galvanic isolation per UL1577 and VDE V 0884-10 standards, with a working voltage of 1200 V_PEAK. This reinforced insulation rating supports use in industrial motor drives and solar inverters where sustained high common-mode voltages and transient immunity are mandatory. The AMC1200BDWV achieves this via a monolithic SiO₂ capacitive barrier with >10¹² Ω isolation resistance and 1.2 pF barrier capacitance.

Can AMC1200BDWV operate with a 3.3-V low-side supply?

Yes, AMC1200BDWV supports low-side supply voltages from 2.7 V to 5.5 V. When VDD2 = 3.3 V, the output common-mode voltage is 1.29 V (typical), and nonlinearity remains ≤0.1% - enabling direct interface to 3.3-V SAR or sigma-delta ADCs without level-shifting circuitry. Low-side supply current is 3.8–6 mA in this configuration, optimizing power in controller-side domains.

What is the maximum input voltage before clipping for AMC1200BDWV?

The AMC1200BDWV clips when the differential input voltage exceeds ±320 mV, though its specified linear range is ±250 mV. Operating beyond ±250 mV degrades nonlinearity and increases noise; therefore, system design must ensure shunt resistor sizing and gain staging keep VINP–VINN within ±250 mV for full accuracy. Input common-mode range extends from –0.16 V to VDD1, accommodating negative rail sensing in low-side configurations.

How does AMC1200BDWV handle common-mode transients?

AMC1200BDWV guarantees ≥10 kV/µs common-mode transient immunity (CMTI), verified per VDE V 0884-10. Its SiO₂ capacitive barrier and differential modulation architecture reject fast dV/dt noise from IGBT/SiC switches, preserving output signal integrity during gate drive transitions. This allows reliable current sensing in 650-V and 1200-V inverter half-bridges without additional filtering or guard traces.

Is AMC1200BDWV pin-compatible with AMC1200DWV?

No - AMC1200BDWV and AMC1200DWV share identical pinout and package (SOIC-8 DWV), but differ in isolation rating: AMC1200BDWV is rated for 4250 V_PEAK, while AMC1200DWV is rated for 4000 V_PEAK. Both meet UL1577 and VDE V 0884-10, but AMC1200BDWV undergoes stricter qualification testing. Electrical specifications (gain, bandwidth, offset) are identical; substitution requires validation of system-level isolation margin requirements.