Texas Instruments AMC1203BPSAR

Overview

AMC1203BPSAR 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, ±1% max gain error (AMC1203B variant), and 3500V_PEAK basic isolation per VDE 0884-17 - enabling direct connection to motor-drive shunt resistors with galvanic separation between high-side analog and low-side digital domains.

For engineers reviewing the AMC1203BPSAR datasheet, AMC1203BPSAR pinout, AMC1203BPSAR application, or AMC1203BPSAR equivalent, this page delivers verified specifications, SOP-8 (PSA) package mapping, functional role in isolated current feedback loops, and validated alternative options for motor control and UPS signal conditioning designs.

Technical Context

The AMC1203BPSAR implements a second-order switched-capacitor delta-sigma modulator with SiO₂ capacitive isolation barrier, shifting quantization noise beyond 1MHz for effective sinc3 filtering. Its differential analog front-end presents 28kΩ dynamic input impedance and supports common-mode voltages from 0V to AVDD.

Digital output (DOUT) is synchronous to the internally generated 10MHz clock (CLKOUT), requiring external decimation via MCU SDFM or FPGA sinc3 filter (OSR=256) to achieve 16-bit resolution, 87dB SNR, and 39kSPS data rate - with guaranteed linearity over –40°C to +105°C ambient.

Key Specifications

Pinout & Package

The AMC1203BPSAR is supplied in an 8-pin SOP (PSA) gull-wing surface-mount package measuring 5.27mm × 7.9mm, with creepage/clearance ≥6.3mm and 1.5pF input-to-output capacitance for minimal noise coupling.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AMC1303L2510DWVR and ISO224BDWVR, the AMC1203BPSAR provides the only combination of VDE 0884-17 certification, ±280mV shunt-optimized input, integrated clock, and SOP-8 footprint - making it uniquely suited for cost-sensitive, safety-compliant motor drive current sensing where board space and BOM count are constrained.

Availability

AMC1203BPSAR is available at Aetrix Electronics and suitable for industrial motor drives, frequency inverters, and uninterruptible power supplies requiring stable component supply across extended product lifecycles and multi-year production ramps.

Supply support for AMC1203BPSAR 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 precision isolation and real-time control ICs.

The AMC1203BPSAR belongs to TI's isolated delta-sigma modulator product line, designed specifically for high-accuracy, noise-immune current sensing in industrial motor control, renewable energy inverters, and power conversion systems.

FAQ

What is the isolation rating of the AMC1203BPSAR and which standards does it meet?

The AMC1203BPSAR provides 3500V_PEAK basic isolation per DIN EN IEC 60747-17 (VDE 0884-17) and 2500V_RMS for 1 minute per UL1577. These certifications validate its use in industrial equipment requiring reinforced insulation barriers, such as motor drives operating up to 690VAC mains. The AMC1203BPSAR meets both standards with test conditions fully documented in its TI datasheet SBAS427E.

Does the AMC1203BPSAR require an external clock source?

No, the AMC1203BPSAR integrates a 10MHz internal clock generator, eliminating the need for external oscillators or crystals. The CLKOUT pin delivers this clock as a CMOS-compatible square wave, which synchronizes the DOUT bitstream and serves as the timing reference for external sinc3 decimation filters. This feature simplifies layout and reduces BOM cost in space-constrained applications like servo drives.

What is the difference between the AMC1203 and AMC1203B variants?

The AMC1203B variant (as in AMC1203BPSAR) offers tighter gain error specification: ±1% maximum versus ±2% for the base AMC1203. Both share identical offset error (±1mV), offset drift (±5µV/°C), and gain drift (±20ppm/°C). The AMC1203BPSAR part number explicitly denotes the B-grade version, ensuring higher accuracy for applications demanding <0.5% total unadjusted error over temperature.

Which package type does AMC1203BPSAR use and what are its key mechanical dimensions?

The AMC1203BPSAR uses the SOP-8 PSA package (gull-wing), measuring 5.27mm × 7.9mm with 1.75mm height. It features ≥6.3mm creepage and clearance, 1.5pF input-to-output capacitance, and is RoHS-compliant. This package is optimized for automated assembly and thermal performance in industrial PCBs, with RθJA = 164°C/W on standard JEDEC test boards.

Can the AMC1203BPSAR interface directly with C2000™ microcontrollers?

Yes, the AMC1203BPSAR is fully compatible with TI's C2000™ real-time MCUs (e.g., TMS320F28004x, F2837x) via their integrated Sigma-Delta Filter Module (SDFM). The DOUT and CLKOUT signals connect directly to SDFM inputs, enabling hardware-accelerated sinc3 filtering, decimation, and oversampling ratio configuration - all without CPU intervention. This integration is validated in TI reference designs like TIDM-1000.