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Texas Instruments AMC1203DUBR
- Part No.:
- AMC1203DUBR
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SMD, Gull Wing
- Datasheet:
-
AMC1203DUBR.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 8SOP
- Quantity:
- Payment:
- Shipping:
Inventory:651
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Product details
Overview
AMC1203DUBR 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 3500VPEAK isolation per VDE 0884-17 - enabling direct connection to motor-phase shunt resistors in servo drives.
For engineers reviewing the AMC1203DUBR datasheet, AMC1203DUBR pinout, AMC1203DUBR application, or AMC1203DUBR equivalent, this page delivers verified electrical specs, SOP-8 gull-wing package mapping, functional role in isolated current feedback loops, and validated alternative options for IEC 61800-compliant drive designs.
Technical Context
The AMC1203DUBR implements a second-order switched-capacitor delta-sigma modulator with silicon-dioxide capacitive isolation barrier, delivering a 1-bit bitstream synchronized to its internally generated 10MHz clock (±2MHz tolerance). Its differential analog front-end has 28kΩ dynamic input impedance and supports common-mode voltages from 0V to AVDD.
Digital output (DOUT) and clock (CLKOUT) reside on the low-side domain, referenced to DGND/DVDD, while analog inputs (INP/INN) and supply (AVDD/AGND) operate on the high-side domain - enabling galvanic separation of measurement and control circuitry in 3-phase inverter legs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Range | ±280mV linear full-scale - matches typical voltage drop across 1–5mΩ shunts at 50–100A currents. |
| Isolation Rating | 3500VPEAK basic isolation (VDE 0884-17) - meets reinforced insulation requirements for 690V AC drives. |
| Internal Clock | 10MHz ±2MHz - eliminates external oscillator, simplifies layout, and enables fixed OSR filter timing. |
| Offset Error | ±1mV max over –40°C to +105°C - ensures <0.5% current measurement error at 200mV full scale. |
| CMTI | 15kV/µs min - withstands fast dv/dt transients from SiC/GaN switching in UPS and inverters. |
| Supply Range | 4.5V–5.5V on both high-side (AVDD) and low-side (DVDD) - supports single 5V rail with local regulation. |
| Resolution | 16-bit effective (ENOB) with sinc3 filter @ OSR=256 - delivers 39kSPS data rate and 87dB dynamic range. |
Pinout & Package
SOP-8 gull-wing package (DUB), 9.5mm × 10.4mm footprint, surface-mount, moisture-sensitive level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 AVDD | High-side power | Analog domain supply (4.5–5.5V); requires local 100nF ceramic decoupling to AGND. |
| 2 INP | Analog input | Noninverting input for differential shunt voltage; connects directly to shunt's high-side terminal. |
| 3 INN | Analog input | Inverting input; connects to shunt's low-side terminal or system ground reference point. |
| 4 AGND | High-side ground | Analog return path - must be separated from digital ground by isolation barrier. |
| 5 DGND | Low-side ground | Digital domain reference; ties to MCU/FPGA ground plane on isolated side. |
| 6 DOUT | Digital output | 1-bit bitstream output synchronized to CLKOUT falling edge; interfaces to SDFM or FPGA logic. |
| 7 CLKOUT | Digital output | 10MHz square-wave clock output; used to time digital filter sampling and synchronize multiple modulators. |
| 8 DVDD | Low-side power | Digital domain supply (4.5–5.5V); decoupled separately from AVDD to minimize coupling noise. |
Key Features
| Feature | Design Value |
|---|---|
| Capacitive isolation barrier | SiO₂ dielectric enables 15kV/µs CMTI and immunity to magnetic fields - critical for gate-driver proximity in motor drives. |
| Integrated clock generator | Eliminates external crystal or oscillator, reducing BOM count and PCB area while ensuring deterministic timing for sinc filtering. |
| Low DC error stack-up | ±1mV offset + ±2% gain error ensures <±0.7% total unadjusted error at 25°C - reduces need for per-unit calibration in production. |
| Differential input architecture | 28kΩ dynamic impedance and 92dB CMRR at DC enable accurate sensing in high common-mode voltage environments (e.g., phase-leg midpoints). |
| Extended temperature range | Specified from –40°C to +105°C ambient - supports operation inside enclosed variable-frequency drives without derating. |
Applications
| Industrial Motor Drives | Frequency Inverters |
|---|---|
Use Scenario: Real-time phase current monitoring in 3-phase PMSM/induction motor control loops. IC Role / Device Role / Timing Role: High-side isolated analog-to-bitstream converter feeding SDFM in C2000 MCU for field-oriented control. Use Value: Enables <1µs current loop latency with 16-bit resolution at 39kSPS - meeting IEC 61800-3 torque ripple requirements. |
Use Scenario: Bidirectional DC-link current sensing in regenerative braking circuits. IC Role / Device Role / Timing Role: Galvanically isolated modulator capturing fast transient currents during IGBT/SiC switching transitions. Use Value: 15kV/µs CMTI prevents data corruption during 1000V/µs bus transients - maintaining closed-loop stability under fault conditions. |
| Uninterruptible Power Supplies (UPS) | Power Conversion Circuits |
Use Scenario: Input/output current monitoring in double-conversion online UPS with active PFC and inverter stages. IC Role / Device Role / Timing Role: Isolated current digitizer on both AC input and DC bus sides, referenced to separate grounds. Use Value: Dual-domain 4.5–5.5V supply range allows shared 5V bias across isolated domains - simplifying auxiliary power design. |
Use Scenario: High-accuracy current feedback in telecom rectifiers and server PSU modules. IC Role / Device Role / Timing Role: Precision shunt interface providing 16-bit ENOB for digital power management ICs (e.g., TI UCD3138). Use Value: ±280mV input range matches standard 0.5–2mΩ shunts at 100–200A, eliminating signal conditioning amplifiers. |
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 (5000VRM), ±250mV input, integrated LDO, lower CMTI (10kV/µs) | Required where UL/IEC reinforced insulation is mandated (e.g., medical or grid-tied solar) | Select when safety certification level exceeds basic isolation requirements - not drop-in due to different supply architecture and pinout. |
| ISO224BDWVR | Galvanic isolation amplifier (not modulator), ±10V input, 12-bit output, no internal clock | Suitable for analog-output systems needing buffered voltage output instead of bitstream | Choose only if downstream ADC or processor lacks sigma-delta filter capability - requires external clock and differs in signal chain topology. |
Compared with AMC1203DUBR, AMC1303M0510DWR provides higher isolation rating but sacrifices CMTI and requires external power sequencing; ISO224BDWVR offers analog output convenience but loses resolution, noise performance, and inherent oversampling flexibility - making AMC1203DUBR optimal for cost-sensitive, high-performance digital current sensing.
Availability
AMC1203DUBR 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 AMC1203DUBR 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 solutions.
The AMC1203 belongs to TI's isolated delta-sigma modulator product line, designed specifically for high-fidelity current sensing in industrial motor control, renewable energy, and power conversion systems demanding accuracy, noise immunity, and long-term reliability.
FAQ
What is the isolation rating of the AMC1203DUBR and which standards does it meet?
The AMC1203DUBR provides 3500VPEAK basic isolation per DIN EN IEC 60747-17 (VDE 0884-17) and 2500VRMS 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 DUB package configuration used in AMC1203DUBR.
Does the AMC1203DUBR require an external clock source?
No, the AMC1203DUBR includes an internal 10MHz clock generator. The CLKOUT pin delivers this clock as a square wave for synchronizing external digital filters. No external oscillator or crystal is needed, reducing component count and layout complexity in designs using AMC1203DUBR.
What is the maximum recommended data rate achievable with the AMC1203DUBR?
With a sinc3 digital filter and oversampling ratio (OSR) of 256, the AMC1203DUBR achieves a 39kSPS output data rate and 16-bit effective resolution. Higher data rates (e.g., 78kSPS at OSR=128) are possible but reduce resolution and dynamic range - the 39kSPS point represents the optimal balance for motor control loop bandwidth.
Can the AMC1203DUBR be used with microcontrollers other than TI C2000 devices?
Yes, the AMC1203DUBR outputs a synchronous 1-bit bitstream compatible with any FPGA, ASIC, or MCU capable of implementing a sinc3 filter - including Xilinx Zynq, Intel Cyclone, STMicro STM32H7, and NXP S32K series. The key requirement is access to CLKOUT for precise sampling timing, not vendor-specific IP.
How does the AMC1203DUBR handle common-mode transients in noisy inverter environments?
The AMC1203DUBR achieves ≥15kV/µs common-mode transient immunity (CMTI) via its silicon-dioxide capacitive isolation barrier and differential input architecture. This specification is tested and guaranteed - ensuring reliable bitstream integrity even during rapid 1200V bus switching events typical in SiC-based inverters using AMC1203DUBR.
AMC1203DUBR 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:
- -
- 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:
- -
AMC1203DUBR FAQ
1.How can I place an order for AMC1203DUBR through Aetrix?
Please submit a Request for Quotation (RFQ) for AMC1203DUBR 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 AMC1203DUBR reliable?
The price and inventory of AMC1203DUBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AMC1203DUBR is usually 5 days.
3.What payment methods are accepted for AMC1203DUBR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AMC1203DUBR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AMC1203DUBR?
AMC1203DUBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AMC1203DUBR 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 AMC1203DUBR?
For technical support, including AMC1203DUBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AMC1203DUBR requirements.
6.How does Aetrix verify that AMC1203DUBR is sourced from the original manufacturer or authorized distributors?
All AMC1203DUBR 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 AMC1203DUBR meets industry standards.
7.What is the process for return or replacement of AMC1203DUBR?
All AMC1203DUBR units undergo pre-shipment inspection (PSI). If there is an issue with AMC1203DUBR, 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 AMC1203DUBR part is unused and in its original packaging.
Return procedure for AMC1203DUBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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