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Home > Products > Integrated Circuits (ICs) > Data Acquisition > Analog to Digital Converters (ADC)

Texas Instruments AMC1203DUB

Name: AMC1203DUB
Brand: Texas Instruments
SKU: AMC1203DUB
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AMC1203DUB

Manufacturer:: Texas Instruments

Category:: Analog to Digital Converters (ADC)

Package:: 8-SMD, Gull Wing

Datasheet:: AMC1203DUB.pdf

Description:: IC ADC 16BIT SIGMA-DELTA 8SOP

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Product details

Overview

AMC1203DUB 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-phase shunt resistors in inverters and UPS.

For engineers reviewing the AMC1203DUB datasheet, AMC1203DUB pinout, AMC1203DUB application, or AMC1203DUB equivalent, this page delivers verified specifications, SOP-8 gull-wing package details, functional role in isolated current feedback loops, and validated alternative options for motor control and power conversion designs.

Technical Context

The AMC1203DUB implements a second-order switched-capacitor delta-sigma modulator with SiO₂ capacitive isolation barrier, delivering a 1-bit bitstream synchronized to its internally generated 10MHz clock (±2MHz tolerance). Its differential analog front-end exhibits 28kΩ dynamic input impedance and supports common-mode voltages from 0V to AVDD.

Output data requires external digital filtering (e.g., sinc3 with OSR=256) to achieve 16-bit resolution, 39kSPS data rate, and 87dB dynamic range. The device separates high-side analog (AVDD/AGND/INP/INN) and low-side digital (DVDD/DGND/CLKOUT/DOUT) domains, with CMTI ≥15kV/µs and certified 2500V_RMS/1min UL1577 isolation.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Range	±280mV linear differential range - matches typical shunt voltage drop at full-scale motor current.
Isolation Rating	3500V_PEAK basic isolation (VDE 0884-17) - enables safe operation across 690VAC motor drive bus potentials.
Internal Clock	10MHz ±2MHz - eliminates need for external oscillator; CLKOUT provides synchronous timing for downstream filter logic.
DC Accuracy	±1mV offset error, ±2% gain error - ensures <0.5% full-scale current measurement error over –40°C to +105°C.
Supply Range	4.5V–5.5V on both AVDD and DVDD - supports standard 5V industrial rails without LDO regulation.
CMTI	≥15kV/µs - maintains data integrity during fast IGBT switching transients in frequency inverters.
Resolution & Rate	16-bit effective (sinc3, OSR=256), 39kSPS - balances precision and bandwidth for closed-loop torque control.

Pinout & Package

SOP-8 gull-wing package (DUB), 9.5mm × 10.4mm footprint, surface-mount compatible with standard reflow profiles.

Pin/Terminal	Circuit Role	Design Meaning
1 AVDD	High-side power	Analog domain supply - must be decoupled locally to AGND for noise-sensitive modulator core.
2 INP	Analog input	Noninverting input - connects directly to shunt resistor high side; 28kΩ dynamic impedance minimizes loading.
3 INN	Analog input	Inverting input - connects to shunt resistor low side; differential pair rejects common-mode bus noise.
4 AGND	High-side ground	Analog reference return - must be isolated from DGND; forms high-side domain with AVDD.
5 DGND	Low-side ground	Digital reference return - connects to MCU/FPGA ground; galvanically separated from AGND by SiO₂ barrier.
6 DOUT	Digital output	1-bit bitstream output - synchronous to CLKOUT falling edge; requires external sinc filter for decimation.
7 CLKOUT	Digital output	10MHz clock replica - drives downstream filter logic; duty cycle 42–58%, t_D = –2 to +2ns relative to CLKOUT edge.
8 DVDD	Low-side power	Digital domain supply - powers output drivers and isolation interface; separate from AVDD for noise isolation.

Key Features

Feature	Design Value
Capacitive Isolation Barrier	SiO₂-based, 3500V_PEAK rated - provides magnetic-field immunity superior to transformer-based isolators in motor drive EMI environments.
Integrated Clock Generator	10MHz internal oscillator - removes external crystal cost, layout area, and startup delay; CLKOUT enables deterministic timing.
High CMTI	≥15kV/µs - prevents bit errors during 1200V/µs IGBT switching events in 3-phase inverters.
Low DC Errors	±1mV offset, ±2% gain error - enables single-point calibration for <0.3% total unadjusted error in production test.
Wide Temp Range	–40°C to +105°C ambient - qualified for under-hood and cabinet-mounted industrial power electronics.

Applications

Industrial Motor Drives	Frequency Inverters
Use Scenario: Real-time phase current monitoring in 3-phase AC induction motor drives using low-value shunt resistors. IC Role / Device Role / Timing Role: Isolated delta-sigma modulator converting shunt voltage to synchronized bitstream for FPGA-based sinc filtering. Use Value: Enables precise field-oriented control (FOC) with <1% current ripple at 10kHz PWM, meeting IEC 61800-3 EMC requirements.	Use Scenario: Bidirectional DC-link current sensing in regenerative frequency inverters for HVAC and pump systems. IC Role / Device Role / Timing Role: High-CMTI isolated modulator interfacing shunt to dual-core C2000™ MCU with hardware SDFM. Use Value: Supports zero-crossing detection and energy recovery accuracy within ±0.5% over temperature, improving system efficiency by 1.2%.
Uninterruptible Power Supplies (UPS)	Power Conversion Circuits
Use Scenario: Input/output current monitoring in online double-conversion UPS with 400VDC bus and 20kVA rating. IC Role / Device Role / Timing Role: Basic-isolated modulator feeding isolated ADC interface in redundant control architecture. Use Value: Maintains measurement integrity during 10kV surge events on AC input, satisfying UL 1778 transient immunity requirements.	Use Scenario: Isolated current feedback in 10kW server PSU LLC resonant converters with GaN FETs. IC Role / Device Role / Timing Role: High-bandwidth modulator capturing fast transient currents up to 500kHz switching frequency. Use Value: Delivers 39kSPS sampled data with 87dB SNR, enabling adaptive dead-time control that reduces conduction losses by 8%.

Industrial Motor Drives

Frequency Inverters

Use Scenario: Real-time phase current monitoring in 3-phase AC induction motor drives using low-value shunt resistors.

IC Role / Device Role / Timing Role: Isolated delta-sigma modulator converting shunt voltage to synchronized bitstream for FPGA-based sinc filtering.

Use Value: Enables precise field-oriented control (FOC) with <1% current ripple at 10kHz PWM, meeting IEC 61800-3 EMC requirements.

Use Scenario: Bidirectional DC-link current sensing in regenerative frequency inverters for HVAC and pump systems.

IC Role / Device Role / Timing Role: High-CMTI isolated modulator interfacing shunt to dual-core C2000™ MCU with hardware SDFM.

Use Value: Supports zero-crossing detection and energy recovery accuracy within ±0.5% over temperature, improving system efficiency by 1.2%.

Uninterruptible Power Supplies (UPS)

Power Conversion Circuits

Use Scenario: Input/output current monitoring in online double-conversion UPS with 400VDC bus and 20kVA rating.

IC Role / Device Role / Timing Role: Basic-isolated modulator feeding isolated ADC interface in redundant control architecture.

Use Value: Maintains measurement integrity during 10kV surge events on AC input, satisfying UL 1778 transient immunity requirements.

Use Scenario: Isolated current feedback in 10kW server PSU LLC resonant converters with GaN FETs.

IC Role / Device Role / Timing Role: High-bandwidth modulator capturing fast transient currents up to 500kHz switching frequency.

Use Value: Delivers 39kSPS sampled data with 87dB SNR, enabling adaptive dead-time control that reduces conduction losses by 8%.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
AMC1303M0510DWR	Reinforced isolation (5000V_PEAK), ±250mV input, integrated sinc filter; 10MHz clock.	Required where reinforced isolation is mandated (e.g., medical, EV charging); higher BOM cost.	Select when safety certification requires reinforced isolation beyond basic; not drop-in due to different pinout and filtered output.
ISO224BDWVR	Galvanic isolation amplifier (not modulator), ±10V input, 10MHz bandwidth, 12-bit output.	Suitable for analog-output systems needing direct voltage scaling; lacks bitstream interface for sinc filtering.	Choose for legacy analog signal chains or where MCU lacks SDFM; requires external ADC and adds latency vs. modulator+filter path.

Compared with AMC1303M0510DWR and ISO224BDWVR, the AMC1203DUB offers lower-cost basic isolation with native bitstream output optimized for TI C2000™ SDFM or FPGA filter implementation - ideal for cost-sensitive industrial motor drives where 3500V_PEAK meets system-level safety requirements.

Availability

AMC1203DUB is available at Aetrix Electronics and suitable for industrial motor drives, frequency inverters, and uninterruptible power supplies requiring stable component supply, long-term lifecycle support, and traceable sourcing for production ramp.

Supply support for AMC1203DUB 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 AMC1203 belongs to TI's precision isolated sensing portfolio, designed specifically for high-accuracy current measurement in noisy power electronics - emphasizing robustness, low drift, and seamless integration with C2000™ real-time MCUs.

FAQ

What is the isolation rating of the AMC1203DUB and which standards does it meet?

The AMC1203DUB 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 suitability for industrial motor drives and UPS systems operating up to 690VAC mains, with clearance and creepage ≥7mm in the DUB package.

Does the AMC1203DUB require an external clock source?

No, the AMC1203DUB integrates a 10MHz internal clock generator. The CLKOUT pin provides a buffered replica of this clock, eliminating the need for external oscillators or crystals. This simplifies layout, reduces BOM count, and ensures deterministic timing alignment between modulation and downstream digital filtering.

How is the AMC1203DUB typically interfaced with a microcontroller?

The AMC1203DUB outputs a 1-bit bitstream on DOUT, synchronized to the falling edge of CLKOUT. It is commonly interfaced with TI C2000™ MCUs using their hardware sigma-delta filter module (SDFM), or with FPGAs implementing a sinc3 filter. No external ADC is required - the modulator + digital filter achieves 16-bit effective resolution at 39kSPS.

What are the supply voltage requirements for the AMC1203DUB?

The AMC1203DUB requires two independent 4.5V–5.5V supplies: AVDD and AGND for the high-side analog domain, and DVDD and DGND for the low-side digital domain. Both rails must be decoupled locally with 100nF ceramic capacitors; no level-shifting or regulation is needed for standard 5V industrial systems.

Can the AMC1203DUB be used with shunt resistors in high-common-mode-voltage applications?

Yes - the AMC1203DUB is explicitly designed for shunt-based current sensing with common-mode input voltage ranging from 0V to AVDD. Its 15kV/µs CMTI and SiO₂ isolation barrier maintain accuracy even during fast-switching transients in 3-phase inverters with >1000V bus potentials, provided the differential input stays within ±280mV.

AMC1203DUB Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: -

Package/Case:: 8-SMD, Gull Wing

Packaging:: Bulk

Product Status:: Obsolete

Number of Bits:: 16

Sampling Rate (Per Second):: 40k

Number of Inputs:: 1

Input Type:: Differential

Data Interface:: SPI

Configuration:: ADC

Ratio - S/H:ADC:: -

Number of A/D Converters:: 1

Architecture:: Sigma-Delta

Reference Type:: Internal

Voltage - Supply, Analog:: 5V

Voltage - Supply, Digital:: 5V

Features:: -

Operating Temperature:: -40°C ~ 105°C

Supplier Device Package:: 8-SOP

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

AMC1203DUB FAQ

1.How can I place an order for AMC1203DUB through Aetrix?

Please submit a Request for Quotation (RFQ) for AMC1203DUB 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 AMC1203DUB reliable?

The price and inventory of AMC1203DUB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AMC1203DUB is usually 5 days.

3.What payment methods are accepted for AMC1203DUB?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AMC1203DUB transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AMC1203DUB?

AMC1203DUB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AMC1203DUB 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 AMC1203DUB?

For technical support, including AMC1203DUB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AMC1203DUB requirements.

6.How does Aetrix verify that AMC1203DUB is sourced from the original manufacturer or authorized distributors?

All AMC1203DUB 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 AMC1203DUB meets industry standards.

7.What is the process for return or replacement of AMC1203DUB?

All AMC1203DUB units undergo pre-shipment inspection (PSI). If there is an issue with AMC1203DUB, 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 AMC1203DUB part is unused and in its original packaging.

Return procedure for AMC1203DUB:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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