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Texas Instruments AMC1203BDW
- Part No.:
- AMC1203BDW
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AMC1203BDW.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,684
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Product details
Overview
AMC1203BDW 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, 16-bit effective resolution (with sinc3 filter, OSR=256), 87dB dynamic range, and 39kSPS data rate. It operates across –40°C to +105°C with dual 4.5–5.5V supplies on isolated sides.
For engineers reviewing the AMC1203BDW datasheet, AMC1203BDW pinout, AMC1203BDW application, or AMC1203BDW equivalent, this page delivers verified specifications, SOIC-16 package details, isolation-critical timing behavior, and validated alternatives for motor drive and UPS current feedback loops.
Technical Context
The AMC1203BDW implements a second-order switched-capacitor delta-sigma modulator with SiO₂ capacitive isolation barrier, enabling galvanic separation between high-side analog (AVDD/AGND/INP/INN) and low-side digital (DVDD/DGND/CLKOUT/DOUT) domains. Its internal 10MHz clock generator eliminates external timing components and synchronizes the 1-bit bitstream output to CLKOUT.
It delivers DC accuracy with ±1mV offset error (max), ±2% gain error (max), ±5µV/°C offset drift, and ±20ppm/°C gain drift - all specified over full –40°C to +105°C ambient. Common-mode transient immunity exceeds 15kV/µs, and it meets 3500VPEAK basic isolation per VDE 0884-17 and 2500VRMS/1min per UL1577.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Range | ±280mV differential - matches typical shunt resistor voltage drop at full-scale current, eliminating external scaling. |
| Internal Clock | 10MHz ±2MHz - enables fixed, jitter-free sampling without external oscillator; supports 39kSPS output with sinc3/OSR=256. |
| Isolation Rating | 3500VPEAK basic (VDE 0884-17) - certifies safe operation in 400V AC motor drives and UPS DC-link monitoring. |
| DC Accuracy | ±1mV offset error (max), ±2% gain error (max) - ensures <0.1% full-scale error in closed-loop current control without calibration. |
| Dynamic Performance | 87dB SNR, 16-bit ENOB (sinc3, OSR=256) - achieves high-resolution digitization of low-amplitude current signals amid EMI. |
| Supply Range | 4.5V–5.5V on both AVDD (high-side) and DVDD (low-side) - supports standard 5V rail designs with margin for ripple and dropout. |
| Operating Temp | –40°C to +105°C - qualified for under-hood, inverter module, and industrial enclosure environments. |
Pinout & Package
AMC1203BDW is housed in a 16-pin SOIC (DW) package measuring 10.3mm × 10.3mm, with gull-wing leads and internal SiO₂ isolation barrier. Pin 1 is AVDD; pins 4 and 8 are AGND (internally tied); pins 9 and 16 are DGND (internally tied); pins 5, 6, 7, 10, 12, and 15 are NC (no internal connection).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, AVDD | High-side analog supply | Power for modulator core and input stage; requires local 0.1µF decoupling to AGND. |
| 2, INP | Differential analog input (+) | Connects directly to shunt resistor high side; 28kΩ dynamic input impedance minimizes loading. |
| 3, INN | Differential analog input (–) | Connects directly to shunt resistor low side; common-mode range 0V to AVDD enables ground-referenced sensing. |
| 4 & 8, AGND | High-side analog ground | Reference for AVDD and analog inputs; must be star-connected near shunt to avoid noise coupling. |
| 9 & 16, DGND | Low-side digital ground | Reference for DVDD, DOUT, and CLKOUT; must be isolated from AGND except via isolation barrier. |
| 11, DOUT | 1-bit modulator output | CMOS-level bitstream synchronized to CLKOUT falling edge; requires external sinc3 or FPGA-based decimation. |
| 13, CLKOUT | Internal clock output | 10MHz square wave (tHIGH = 43.5–58.5ns); used to clock downstream digital filter or MCU SDFM. |
| 14, DVDD | Low-side digital supply | Power for isolation transmitter and output drivers; separate from AVDD to maintain galvanic separation. |
Key Features
| Feature | Design Value |
|---|---|
| Capacitive SiO₂ isolation barrier | Enables >15kV/µs CMTI and immunity to magnetic fields - critical for IGBT gate-drive noise environments. |
| Integrated 10MHz clock generator | Removes need for external crystal or oscillator, reducing BOM count and layout sensitivity to clock routing. |
| ±280mV input range with 28kΩ input impedance | Directly interfaces 100µΩ–1mΩ shunts at 10–100A full scale without gain stages or level shifting. |
| Specified DC errors over –40°C to +105°C | Supports uncalibrated current measurement in wide-temperature industrial inverters without software compensation. |
| SOIC-16 DW package with creepage ≥8mm | Meets reinforced insulation spacing requirements for 400V AC mains-connected equipment per IEC 60664-1. |
Applications
| Motor Phase Current Sensing | DC-Link Current Monitoring |
|---|---|
Use Scenario: Real-time current feedback in 3-phase PMSM or induction motor drives using space-vector PWM. IC Role / Device Role / Timing Role: Isolated delta-sigma modulator digitizing shunt voltage with 10MHz clock-synchronized bitstream for SDFM decimation. Use Value: Enables precise field-oriented control with <1% current error across temperature, supporting torque ripple <2% at full load. |
Use Scenario: Bidirectional current measurement in UPS or solar inverter DC bus for battery charge/discharge management. IC Role / Device Role / Timing Role: High-CMTI isolated modulator capturing fast transients during IGBT switching events without corruption. Use Value: Delivers 39kSPS sampled data with 87dB SNR, allowing accurate RMS calculation and overcurrent detection within 10µs. |
| Industrial Servo Amplifier Feedback | Energy Meter Current Channel |
Use Scenario: High-bandwidth current loop closure in CNC motion controllers requiring sub-µs latency and thermal stability. IC Role / Device Role / Timing Role: Galvanically isolated analog front-end converting shunt voltage to bitstream for FPGA-based real-time filtering. Use Value: ±5µV/°C offset drift and ±20ppm/°C gain drift ensure <0.05% gain error shift over operating temperature swing. |
Use Scenario: Revenue-grade current sensing in three-phase smart meters with anti-tampering isolation requirements. IC Role / Device Role / Timing Role: Basic-isolated modulator meeting IEC 62053-22 Class 0.5S accuracy with certified 3500VPEAK barrier. Use Value: 16-bit ENOB and 87dB SNR support 0.1% metering accuracy even with 100dB conducted EMI on neutral lines. |
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 |
|---|---|---|---|
| AMC1303M2510DW | Reinforced isolation (5000VPK), ±250mV input, integrated sinc3 filter, 20MHz clock | Required where system-level safety mandates reinforced (not basic) isolation per IEC 61800-5-1 | Select when upgrading from basic to reinforced isolation; pinout differs - not drop-in. |
| ISO224BDW | Isolated amplifier (not modulator), ±10V input, 10MHz bandwidth, 12-bit output | Suitable for analog-output systems needing direct voltage interface to SAR ADCs, not bitstream-based filtering | Choose for legacy designs using analog signal chains; lacks inherent oversampling noise shaping. |
Compared with AMC1303M2510DW and ISO224BDW, the AMC1203BDW provides cost-optimized basic isolation with deterministic 10MHz clocking and proven integration with C2000 SDFM - making it ideal for volume industrial motor drives where UL1577/IEC60747-17 compliance suffices.
Availability
AMC1203BDW is available at Aetrix Electronics and suitable for industrial motor drives, uninterruptible power supplies (UPS), frequency inverters, and power conversion circuits requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for AMC1203BDW 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 focused on analog and embedded processing technologies, with decades of expertise in precision isolation and signal conditioning.
The AMC1203BDW belongs to TI's isolated delta-sigma modulator product line, engineered specifically for high-accuracy, high-CMTI current sensing in industrial motor control and power conversion systems.
FAQ
What is the isolation rating of the AMC1203BDW?
The AMC1203BDW provides 3500VPEAK basic isolation per DIN EN IEC 60747-17 (VDE 0884-17) and 2500VRMS/1 minute per UL1577. This certification validates its use in 400V AC industrial systems where basic insulation suffices, such as motor drive phase-leg current sensing. The AMC1203BDW does not meet reinforced isolation requirements.
Does the AMC1203BDW require an external clock source?
No, the AMC1203BDW integrates a 10MHz ±2MHz internal clock generator. Its CLKOUT pin delivers this clock directly, eliminating external oscillators or crystals. This simplifies layout, reduces EMI susceptibility, and ensures deterministic timing for sinc3 filter synchronization - a key advantage of the AMC1203BDW in noise-sensitive applications.
How is the AMC1203BDW output decoded into usable data?
The AMC1203BDW outputs a 1-bit Manchester-encoded bitstream on DOUT, synchronized to CLKOUT. To obtain usable multibit data, a digital low-pass filter - typically a sinc3 filter with OSR=256 - must be applied. This is commonly implemented in TI C2000 microcontrollers' SDFM or in FPGA logic. The AMC1203BDW itself performs no decimation.
What is the maximum recommended shunt resistor value for AMC1203BDW?
Given the AMC1203BDW's ±280mV linear input range and 28kΩ differential input impedance, the maximum recommended shunt resistance is ~1mΩ for 280A full-scale current. Higher values risk violating the ±320mV clipping limit or exceeding input leakage-induced offset. For 100A systems, 250µΩ–500µΩ shunts are optimal - ensuring signal integrity without external amplification in the AMC1203BDW design.
Can the AMC1203BDW operate with asymmetric supply voltages?
No - the AMC1203BDW requires matched 4.5V–5.5V supplies on both AVDD (high-side) and DVDD (low-side). Operation outside this range risks violating absolute maximum ratings or degrading CMTI and accuracy. The AMC1203BDW datasheet specifies no derating or extended operation for mismatched rails; both sides must be independently regulated within nominal 5V ±10%.
AMC1203BDW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- 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:
- 16-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AMC1203BDW FAQ
1.How can I place an order for AMC1203BDW through Aetrix?
Please submit a Request for Quotation (RFQ) for AMC1203BDW 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 AMC1203BDW reliable?
The price and inventory of AMC1203BDW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AMC1203BDW is usually 5 days.
3.What payment methods are accepted for AMC1203BDW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AMC1203BDW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AMC1203BDW?
AMC1203BDW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AMC1203BDW 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 AMC1203BDW?
For technical support, including AMC1203BDW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AMC1203BDW requirements.
6.How does Aetrix verify that AMC1203BDW is sourced from the original manufacturer or authorized distributors?
All AMC1203BDW 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 AMC1203BDW meets industry standards.
7.What is the process for return or replacement of AMC1203BDW?
All AMC1203BDW units undergo pre-shipment inspection (PSI). If there is an issue with AMC1203BDW, 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 AMC1203BDW part is unused and in its original packaging.
Return procedure for AMC1203BDW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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