Texas Instruments AMC1203BDWR

Overview

AMC1203BDWR from Texas Instruments is a precision basic-isolated delta-sigma modulator optimized for shunt-based current sensing in high-noise industrial power systems. It features ±280mV linear input range, 10MHz internal clock, ±1mV max offset error, ±2% max gain error, and 3500V_PEAK isolation per VDE 0884-17 - enabling direct connection to motor-drive shunt resistors with high common-mode transient immunity (15kV/µs).

For engineers reviewing the AMC1203BDWR datasheet, AMC1203BDWR pinout, AMC1203BDWR application, or AMC1203BDWR equivalent, this page delivers verified technical context, SOP-8 DUB package mapping, real-world timing and accuracy specs, and validated alternatives for isolated current measurement in motor drives, UPS, and frequency inverters.

Technical Context

The AMC1203BDWR implements a second-order switched-capacitor delta-sigma modulator with SiO₂ capacitive isolation barrier, shifting quantization noise to high frequencies for digital low-pass filtering (e.g., sinc3, OSR=256). Its differential analog input has 28kΩ dynamic impedance and supports ±320mV clipping voltage while maintaining linearity over ±280mV full-scale range.

It operates with independent high-side (AVDD/AGND) and low-side (DVDD/DGND) 4.5–5.5V supplies, outputs a 1-bit bitstream synchronized to CLKOUT, and achieves 16-bit effective resolution, 87dB dynamic range, and 39kSPS data rate when paired with an external sinc3 filter - without requiring external clock source or layout-critical timing margins.

Key Specifications

Pinout & Package

AMC1203BDWR is supplied in the SOP-8 gull-wing (DUB) package (9.5mm × 10.4mm), optimized for creepage/clearance compliance and thermal performance (R_θJA = 78°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar isolated delta-sigma modulator applications.

Compared with AMC1203BDWR, the AMC1303M0510DWV trades wider input range for superior transient immunity and integrated regulation, while the AD7403BRIZ-RL offers higher sample rate at the expense of DC accuracy and safety certification scope - making AMC1203BDWR optimal for cost-sensitive, VDE-compliant motor drive current sensing where ±280mV range and ±1mV offset are decisive.

Availability

AMC1203BDWR is available at Aetrix Electronics and suitable for industrial motor drives, uninterruptible power supplies (UPS), and frequency inverters requiring stable component supply, long-term lifecycle support, and traceable sourcing for safety-critical designs.

Supply support for AMC1203BDWR 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 ICs for industrial, automotive, and power applications.

The AMC1203BDWR belongs to TI's precision isolated modulator product line, engineered specifically for high-accuracy, low-latency current sensing in noisy power conversion systems - balancing isolation integrity, DC precision, and integration simplicity.

FAQ

What is the isolation rating of the AMC1203BDWR and which standards does it meet?

The AMC1203BDWR provides 3500V_PEAK basic isolation per DIN EN IEC 60747-17 (VDE 0884-17) and 2500V_RMS for 1 minute per UL1577. It also meets IEC 62368-1 surge requirements (4000V_PK) and features 1.5pF input-to-output capacitance. These ratings are validated for the DUB package and apply directly to the AMC1203BDWR device in production.

Does the AMC1203BDWR require an external clock source?

No, the AMC1203BDWR integrates a 10MHz internal clock generator. The CLKOUT pin delivers this clock as a CMOS-compatible square wave (8–12MHz range), eliminating the need for external oscillators or crystals. This simplifies layout, reduces BOM cost, and ensures deterministic timing alignment between DOUT and CLKOUT - a key feature of the AMC1203BDWR design.

What is the maximum recommended data rate achievable with the AMC1203BDWR?

When paired with a sinc3 digital filter at OSR=256, the AMC1203BDWR achieves an effective data rate of 39kSPS with 16-bit resolution and 87dB dynamic range. Higher OSRs reduce output rate but improve SNR; lower OSRs increase rate but sacrifice resolution. The AMC1203BDWR's internal 10MHz clock and fixed modulator architecture define this performance envelope.

Can the AMC1203BDWR be used with shunt resistors, and what is its input impedance?

Yes - the AMC1203BDWR is explicitly optimized for direct shunt resistor interfacing. Its differential input has a dynamic impedance of 28kΩ and accepts ±280mV full-scale differential voltage. With 10nF minimum external capacitance across INP–INN, it maintains stability and noise rejection. This makes the AMC1203BDWR ideal for low-value (e.g., 1–5mΩ) shunts in high-current motor drive applications.

How does the AMC1203BDWR handle common-mode transients, and what is its CMTI specification?

The AMC1203BDWR delivers 15kV/µs minimum common-mode transient immunity (CMTI), enabled by its SiO₂ capacitive isolation barrier and robust internal modulation scheme. This specification is tested and guaranteed across the full –40°C to +105°C temperature range and ensures reliable operation during fast-switching events in IGBT or MOSFET half-bridges - a core capability built into the AMC1203BDWR architecture.