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

Texas Instruments AMC1203BDUBR

Name: AMC1203BDUBR
Brand: Texas Instruments
SKU: AMC1203BDUBR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AMC1203BDUBR

Manufacturer:: Texas Instruments

Category:: Analog to Digital Converters (ADC)

Package:: 8-SMD, Gull Wing

Datasheet:: AMC1203BDUBR.pdf

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

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Product details

Overview

AMC1203BDUBR 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 basic isolation per VDE 0884-17 - enabling direct connection to motor-phase shunt resistors in inverter legs.

For engineers reviewing the AMC1203BDUBR datasheet, AMC1203BDUBR pinout, AMC1203BDUBR application, or AMC1203BDUBR equivalent, this device delivers galvanically isolated 1-bit bitstream output synchronized to an on-chip clock, supporting sinc3 filtering for 16-bit resolution at 39kSPS with 87dB dynamic range in motor control and UPS feedback loops.

Technical Context

The AMC1203BDUBR implements a second-order switched-capacitor delta-sigma modulator with SiO₂ capacitive isolation barrier, providing inherent immunity to magnetic interference and 15kV/µs common-mode transient immunity. Its differential analog front-end has 28kΩ dynamic input impedance and supports ±320mV clipping voltage while maintaining linearity over ±280mV full-scale range.

It operates with fully separated high-side (AVDD/AGND) and low-side (DVDD/DGND) supplies, each rated 4.5V–5.5V, and outputs a CMOS-compatible DOUT bitstream referenced to DVDD with Schmitt-trigger inputs on CLKOUT. The internal 10MHz clock (±2MHz tolerance) eliminates external timing components and ensures deterministic synchronization for digital filter alignment.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Range	±280mV linear differential range - matches typical shunt voltage drop at rated motor current without external scaling.
Isolation Rating	3500V_PEAK basic isolation (VDE 0884-17) - enables safe operation across 600V AC bus domains in industrial drives.
Internal Clock	10MHz ±2MHz - provides fixed, jitter-controlled sampling for consistent sinc3 decimation and eliminates external crystal cost/layout.
Offset Error	±1mV max over –40°C to +105°C - ensures <0.4% full-scale error at ±280mV range, critical for torque accuracy in servo control.
Gain Error	±2% max - defines end-point accuracy of current measurement chain before digital calibration.
CMTI	15kV/µs min - sustains reliable bitstream integrity during fast IGBT switching transients in 3-phase inverters.
Supply Range	High-side: 4.5–5.5V (AVDD); Low-side: 4.5–5.5V (DVDD) - supports standard 5V rail designs with margin for ripple.

Pinout & Package

SOP-8 gull-wing (DUB) package, 9.5mm × 10.4mm footprint, surface-mount, with 3.9mm creepage/clearance between high- and low-side pins.

Pin/Terminal	Circuit Role	Design Meaning
1 AVDD	High-side power	Analog-side supply input - must be decoupled locally to AGND to minimize noise coupling into modulator core.
2 INP	Analog input	Noninverting input - connects directly to shunt resistor high side; forms differential pair with INN for common-mode rejection.
3 INN	Analog input	Inverting input - connects to shunt resistor low side; matched impedance with INP enables >92dB DC CMRR.
4 AGND	High-side ground	Analog reference return - must be isolated from DGND and routed separately to preserve isolation barrier integrity.
5 DGND	Low-side ground	Digital reference return - connects to MCU/FPGA ground plane; no electrical continuity with AGND.
6 DOUT	Digital output	1-bit bitstream output - synchronous to CLKOUT falling edge; requires external sinc3 filter for 16-bit word recovery.
7 CLKOUT	Digital output	10MHz clock output - provides timing reference for downstream digital filter; CMOS level with Schmitt trigger.
8 DVDD	Low-side power	Digital-side supply input - powers DOUT/CLKOUT drivers; independent of AVDD for true galvanic separation.

Key Features

Feature	Design Value
Capacitive SiO₂ isolation barrier	Enables 3500V_PEAK basic isolation with >10¹²Ω insulation resistance and ~1.5pF barrier capacitance - minimizes high-frequency coupling into sensitive analog front-end.
Integrated 10MHz clock generator	Eliminates need for external oscillator or crystal - reduces BOM count, PCB area, and timing skew in multi-channel current sensing systems.
±280mV input range with 28kΩ input impedance	Optimized for direct interface with 1–5mΩ shunts at 100–500A motor currents - avoids gain-stage errors and thermal drift of op-amp signal conditioning.
15kV/µs CMTI	Withstands rapid common-mode dv/dt from IGBT switching in 600V+ inverters - prevents data corruption during PWM dead-time transitions.
Specified –40°C to +105°C operation	Validated performance across full industrial temperature range - supports placement near power modules without derating.

Applications

Industrial Motor Drives	Frequency Inverters
Use Scenario: Real-time phase current measurement in 3-phase PMSM/induction motor drives using low-value shunt resistors mounted on inverter leg PCBs. IC Role / Device Role / Timing Role: Galvanically isolated delta-sigma modulator converting shunt voltage to synchronized 1-bit bitstream for FPGA/MCU-based sinc3 filtering. Use Value: Enables precise field-oriented control (FOC) with <1% current measurement error across temperature, supporting high-efficiency torque regulation.	Use Scenario: Bidirectional current sensing in regenerative braking circuits of variable-frequency drives operating on 400–690V AC mains. IC Role / Device Role / Timing Role: High-CMTI isolated modulator capturing fast transient currents during IGBT commutation with deterministic 10MHz sampling. Use Value: Maintains measurement fidelity during 10kV/µs bus transients, preventing false overcurrent trips and enabling safe energy recovery.
Uninterruptible Power Supplies (UPS)	Power Conversion Circuits
Use Scenario: Input/output DC-link current monitoring in double-conversion online UPS systems with IGBT-based rectifier/inverter stages. IC Role / Device Role / Timing Role: Isolated modulator interfacing with shunts on high-voltage DC bus, delivering bitstream to TI C2000 SDFM for real-time current protection. Use Value: Provides sub-millisecond overcurrent response with ±1mV offset stability - critical for battery bank and inverter short-circuit protection.	Use Scenario: Primary-side current sensing in isolated DC-DC converters (e.g., phase-shifted full-bridge) for peak-current-mode control and fault limiting. IC Role / Device Role / Timing Role: High-accuracy isolated modulator feeding bitstream to digital controller, enabling cycle-by-cycle current limiting without optocoupler latency. Use Value: Achieves <0.5% gain error stability over temperature - improves converter efficiency and load transient response in telecom/server PSUs.

Industrial Motor Drives

Frequency Inverters

Use Scenario: Real-time phase current measurement in 3-phase PMSM/induction motor drives using low-value shunt resistors mounted on inverter leg PCBs.

IC Role / Device Role / Timing Role: Galvanically isolated delta-sigma modulator converting shunt voltage to synchronized 1-bit bitstream for FPGA/MCU-based sinc3 filtering.

Use Value: Enables precise field-oriented control (FOC) with <1% current measurement error across temperature, supporting high-efficiency torque regulation.

Use Scenario: Bidirectional current sensing in regenerative braking circuits of variable-frequency drives operating on 400–690V AC mains.

IC Role / Device Role / Timing Role: High-CMTI isolated modulator capturing fast transient currents during IGBT commutation with deterministic 10MHz sampling.

Use Value: Maintains measurement fidelity during 10kV/µs bus transients, preventing false overcurrent trips and enabling safe energy recovery.

Uninterruptible Power Supplies (UPS)

Power Conversion Circuits

Use Scenario: Input/output DC-link current monitoring in double-conversion online UPS systems with IGBT-based rectifier/inverter stages.

IC Role / Device Role / Timing Role: Isolated modulator interfacing with shunts on high-voltage DC bus, delivering bitstream to TI C2000 SDFM for real-time current protection.

Use Value: Provides sub-millisecond overcurrent response with ±1mV offset stability - critical for battery bank and inverter short-circuit protection.

Use Scenario: Primary-side current sensing in isolated DC-DC converters (e.g., phase-shifted full-bridge) for peak-current-mode control and fault limiting.

IC Role / Device Role / Timing Role: High-accuracy isolated modulator feeding bitstream to digital controller, enabling cycle-by-cycle current limiting without optocoupler latency.

Use Value: Achieves <0.5% gain error stability over temperature - improves converter efficiency and load transient response in telecom/server PSUs.

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_RMS), ±50mV input range, integrated reference, 20MHz clock	Better suited for ultra-high-voltage systems (>1000V) requiring reinforced safety; narrower input range demands external gain	Select when UL/IEC reinforced certification or higher CMTI (>50kV/µs) is mandatory; not drop-in due to different input scaling and pinout.
ISO224BDWVR	Galvanic isolation amplifier (not modulator), ±10V input, 10MHz bandwidth, analog output	Provides conditioned analog output instead of bitstream - requires external ADC and lacks inherent oversampling noise shaping	Choose when legacy analog signal chain exists or when deterministic latency <1µs is required; incompatible with sinc3-based digital filtering architecture.

Compared with AMC1303M0510DWR and ISO224BDWVR, the AMC1203BDUBR offers optimal balance of basic isolation compliance, ±280mV shunt-native input range, and integrated clock for cost-sensitive motor drive and UPS designs where 3500V_PEAK meets safety requirements and digital filtering infrastructure is already deployed.

Availability

AMC1203BDUBR is available at Aetrix Electronics and suitable for industrial motor drives, frequency inverters, and uninterruptible power supplies requiring stable component supply across extended temperature and high-reliability production cycles.

Supply support for AMC1203BDUBR 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 power management solutions for industrial, automotive, and communications markets.

The AMC1203BDUBR belongs to TI's precision isolated modulator product line, designed specifically for high-accuracy current sensing in noisy, high-voltage power conversion systems where galvanic isolation and dc accuracy are critical.

FAQ

What is the isolation rating of the AMC1203BDUBR and which standards does it meet?

The AMC1203BDUBR provides 3500V_PEAK basic isolation per DIN EN IEC 60747-17 (VDE 0884-17) and 2500V_RMS for 1 minute per UL1577. It is certified for basic insulation only and is not rated for reinforced isolation. These ratings are validated through production testing and apply to the SOP-8 DUB package configuration used in the AMC1203BDUBR.

Does the AMC1203BDUBR require an external clock source?

No, the AMC1203BDUBR includes an internal 10MHz clock generator. The CLKOUT pin provides this clock as a CMOS-level output, eliminating the need for external timing components. This internal clock drives both the modulator core and the DOUT bitstream, ensuring deterministic synchronization for downstream sinc3 filtering.

What is the maximum data rate achievable with the AMC1203BDUBR when using a sinc3 filter?

When paired with a sinc3 digital filter at OSR = 256, the AMC1203BDUBR achieves a 39kSPS output data rate with 16-bit effective resolution and 87dB dynamic range. This rate is derived from its 10MHz internal clock divided by OSR and is confirmed in the device's Electrical Characteristics table under "Data Rate" specifications.

Can the AMC1203BDUBR interface directly with TI C2000 microcontrollers?

Yes, the AMC1203BDUBR is fully compatible with TI C2000™ microcontrollers featuring the Sigma-Delta Filter Module (SDFM). The DOUT bitstream and CLKOUT signals connect directly to SDFM inputs, enabling hardware-accelerated sinc3 filtering without CPU overhead - a key design advantage documented in TI application reports for motor control.

What are the supply voltage requirements for the AMC1203BDUBR high-side and low-side rails?

The AMC1203BDUBR requires separate 4.5V to 5.5V supplies: AVDD and AGND on the high side for analog circuitry, and DVDD and DGND on the low side for digital outputs. Both rails must be independently decoupled; operation outside this range risks exceeding absolute maximum ratings and invalidating isolation certification.

AMC1203BDUBR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: -

Package/Case:: 8-SMD, Gull Wing

Packaging:: Tape & Reel (TR)

Product Status:: Active

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:: -

AMC1203BDUBR FAQ

1.How can I place an order for AMC1203BDUBR through Aetrix?

Please submit a Request for Quotation (RFQ) for AMC1203BDUBR 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 AMC1203BDUBR reliable?

The price and inventory of AMC1203BDUBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AMC1203BDUBR is usually 5 days.

3.What payment methods are accepted for AMC1203BDUBR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AMC1203BDUBR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AMC1203BDUBR?

AMC1203BDUBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AMC1203BDUBR 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 AMC1203BDUBR?

For technical support, including AMC1203BDUBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AMC1203BDUBR requirements.

6.How does Aetrix verify that AMC1203BDUBR is sourced from the original manufacturer or authorized distributors?

All AMC1203BDUBR 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 AMC1203BDUBR meets industry standards.

7.What is the process for return or replacement of AMC1203BDUBR?

All AMC1203BDUBR units undergo pre-shipment inspection (PSI). If there is an issue with AMC1203BDUBR, 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 AMC1203BDUBR part is unused and in its original packaging.

Return procedure for AMC1203BDUBR:

1.Submit a request within 90 days.

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

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