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Texas Instruments AMC1203PSA
- Part No.:
- AMC1203PSA
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
AMC1203PSA.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 8SOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,669
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Product details
Overview
AMC1203PSA 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 drive current-sense shunts.
For engineers reviewing the AMC1203PSA datasheet, AMC1203PSA pinout, AMC1203PSA application, or AMC1203PSA equivalent, this page delivers verified specifications, SOP-8 (PSA) package details, functional pin roles, real-world implementation context for isolated current measurement, and validated alternative options for system-level design continuity.
Technical Context
The AMC1203PSA implements a second-order switched-capacitor delta-sigma modulator with SiO2 capacitive isolation barrier, delivering a synchronous 1-bit bitstream output referenced 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.
It operates with galvanically separated power domains: AVDD/AGND (high-side analog) and DVDD/DGND (low-side digital), each rated 4.5–5.5V. The device achieves 16-bit effective resolution (87dB SNR, 39kSPS) when paired with a sinc3 filter at OSR=256, and provides 15kV/µs CMTI for robust operation in fast-switching inverters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Range | ±280mV linear differential range - matches typical shunt voltage drop at full-scale motor current without external scaling. |
| Isolation Rating | 3500VPEAK basic isolation (VDE 0884-17) - enables safe interface between 690VAC motor phases and low-voltage MCU domains. |
| Internal Clock | 10MHz ±2MHz - eliminates need for external oscillator; CLKOUT pin provides synchronous timing for downstream digital filtering. |
| DC Accuracy | ±1mV offset error, ±2% gain error - ensures <0.5% full-scale current measurement error across –40°C to +105°C without calibration. |
| Dynamic Performance | 87dB SNR, 39kSPS data rate with sinc3/OSR=256 - supports high-fidelity torque control loop sampling in servo drives. |
| Supply Range | 4.5V–5.5V on both AVDD and DVDD - compatible with standard 5V industrial power rails and tolerant of rail droop during transients. |
| CMTI | ≥15kV/µs - maintains data integrity during IGBT switching edges in 1200V SiC inverter stages. |
Pinout & Package
The AMC1203PSA is housed in an 8-pin SOP (Small Outline Package) with gull-wing leads, measuring 5.27mm × 7.9mm. This surface-mount package supports automated assembly and provides creepage/clearance ≥6.3mm for reinforced PCB layout in 300VRMS systems.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 AVDD | High-side analog supply | Power source for modulator core and input stage; requires local 0.1µF + 10µF decoupling to AGND. |
| 2 INP | Noninverting analog input | Connects to shunt resistor high side; accepts ±280mV differential swing relative to INN. |
| 3 INN | Inverting analog input | Connects to shunt resistor low side or system ground; defines differential reference for current polarity detection. |
| 4 AGND | High-side analog ground | Return path for AVDD and analog inputs; must be isolated from DGND by physical separation and split ground plane. |
| 5 DGND | Low-side digital ground | Reference for DOUT and CLKOUT signals; connects to MCU ground domain on isolated side of PCB. |
| 6 DOUT | Modulator data output | 1-bit Manchester-encoded bitstream synchronized to CLKOUT falling edge; feeds sinc3 filter in MCU/FPGA. |
| 7 CLKOUT | Internal clock output | 10MHz square wave (50% duty cycle ±8ns); used as timing reference for digital filter sampling and synchronization. |
| 8 DVDD | Low-side digital supply | Power for isolation barrier receiver and output drivers; shares same 5V rail as host controller's I/O domain. |
Key Features
| Feature | Design Value |
|---|---|
| Capacitive SiO2 isolation barrier | Enables >15kV/µs CMTI and immunity to magnetic fields - critical for reliability in proximity to power inductors and busbars. |
| Integrated 10MHz clock generator | Removes external crystal or oscillator BOM item and associated layout sensitivity; reduces system cost and board area. |
| Differential input with 28kΩ impedance | Minimizes loading on low-value shunt resistors (<5mΩ), preserving accuracy and thermal stability in high-current paths. |
| VDE 0884-17 & UL1577 certification | Validates safety compliance for industrial equipment up to 300VRMS working voltage - accelerates end-equipment certification. |
| –40°C to +105°C operating range | Supports placement directly adjacent to power modules in motor drives and UPS systems without derating or heatsinking. |
Applications
| Industrial Motor Drives | Frequency Inverters |
|---|---|
Use Scenario: Real-time phase current feedback in 3-phase AC induction or PMSM servo drives using shunt resistors on inverter legs. IC Role / Device Role / Timing Role: Isolated delta-sigma modulator converting shunt voltage to synchronized bitstream for FPGA/MCU-based current reconstruction. Use Value: Enables precise field-oriented control (FOC) with <0.5% current error over temperature, supporting >20kHz PWM switching without aliasing. |
Use Scenario: Bidirectional DC-link current monitoring in regenerative frequency inverters for HVAC and traction systems. IC Role / Device Role / Timing Role: High-CMTI isolated modulator capturing fast transient currents during IGBT commutation events. Use Value: Maintains measurement fidelity during 10kV/µs common-mode transients, preventing false overcurrent trips and improving system uptime. |
| Uninterruptible Power Supplies (UPS) | Power Conversion Circuits |
Use Scenario: Input/output current sensing in double-conversion online UPS units with active rectifiers and IGBT-based inverters. IC Role / Device Role / Timing Role: Galvanically isolated current digitizer interfacing shunts to dual-core C2000™ MCUs with integrated SDFM filters. Use Value: Delivers 16-bit resolution at 39kSPS with <1µV/°C offset drift - enabling accurate battery charge/discharge balancing and efficiency optimization. |
Use Scenario: Primary-side current sensing in isolated DC-DC converters (e.g., LLC, phase-shifted full-bridge) for peak current mode control. IC Role / Device Role / Timing Role: Isolated modulator feeding bitstream to digital controller for real-time current limiting and soft-start sequencing. Use Value: Supports <100ns overcurrent response via hardware-triggered shutdown, protecting GaN/SiC FETs during fault conditions. |
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 |
|---|---|---|---|
| AMC1303M0510DWV | Higher CMTI (±50kV/µs), ±50mV input range, SOIC-8 package with reinforced isolation (5000VRMS) | Better suited for SiC/GaN-based converters requiring ultra-fast transient immunity and tighter input range for low-Rshunt designs | Select when system-level CMTI >25kV/µs is required or when operating with <2mΩ shunts where ±50mV range improves SNR |
| ISO224BDW | Analog output (±10V), 10MHz bandwidth, 120dB CMRR, SOIC-8, no internal clock - requires external ADC and clock source | Used where analog isolation is preferred over digital bitstream, e.g., legacy systems with SAR ADCs or analog control loops | Choose when existing signal chain lacks digital filtering capability or when deterministic latency <1µs is mandatory for analog feedback |
Compared with AMC1303M0510DWV and ISO224BDW, the AMC1203PSA offers the lowest BOM count for digital-current-loop implementations due to its integrated clock and bitstream interface, while providing optimal balance of accuracy, isolation robustness, and temperature stability for mainstream industrial motor control.
Availability
AMC1203PSA is available at Aetrix Electronics and suitable for industrial motor drives, frequency inverters, uninterruptible power supplies (UPS), and isolated power conversion circuits requiring stable component supply across extended temperature and high-reliability production cycles.
Supply support for AMC1203PSA 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 ICs for industrial, automotive, and communications markets.
The AMC1203PSA belongs to TI's precision isolated delta-sigma modulator product line, engineered specifically for high-accuracy, noise-immune current sensing in next-generation motor drives and energy conversion systems.
FAQ
What is the exact package type and footprint for AMC1203PSA?
The AMC1203PSA uses an 8-pin SOP (Small Outline Package) with gull-wing leads, designated PSA in TI documentation. Its nominal dimensions are 5.27mm × 7.9mm, with 1.27mm lead pitch and ≥6.3mm creepage/clearance - matching JEDEC MS-012AC standards. This footprint is not pin-compatible with the DUB or DW variants of the AMC1203 family.
Does AMC1203PSA require an external clock source?
No, the AMC1203PSA integrates a 10MHz ±2MHz internal clock generator. The CLKOUT pin provides this clock as a CMOS-level square wave for synchronizing downstream digital filters. No external oscillator, crystal, or clock buffer is needed - simplifying layout and reducing bill-of-materials cost.
How does AMC1203PSA achieve 16-bit resolution without an onboard ADC?
The AMC1203PSA outputs a 1-bit sigma-delta bitstream synchronized to CLKOUT. When processed by an external sinc3 digital filter (e.g., TI C2000™ SDFM or FPGA logic) at OSR=256, it delivers 16-bit effective resolution, 87dB SNR, and 39kSPS output data rate - shifting quantization noise to high frequencies for clean baseband reconstruction.
What safety certifications apply specifically to AMC1203PSA?
The AMC1203PSA is certified to DIN EN IEC 60747-17 (VDE 0884-17) for 3500VPEAK basic isolation and UL1577 for 2500VRMS withstand voltage (1 minute). These certifications are valid for the PSA package and cover all operating conditions from –40°C to +105°C, supporting industrial equipment compliance under IEC 61800-5-1 and IEC 62109.
Can AMC1203PSA interface directly with a microcontroller's GPIO pins?
Yes - the AMC1203PSA's DOUT and CLKOUT outputs are CMOS-compatible (VOH ≥ DVDD–0.4V, VOL ≤ 0.4V at 4mA) and operate at 5V logic levels. It interfaces directly with C2000™, Sitara™, or other MCUs featuring dedicated sigma-delta filter modules (SDFM) or FPGA-based decimation logic, requiring no level-shifting or signal conditioning.
AMC1203PSA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.209", 5.30mm Width)
- Packaging:
- Bulk
- 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:
- -
AMC1203PSA FAQ
1.How can I place an order for AMC1203PSA through Aetrix?
Please submit a Request for Quotation (RFQ) for AMC1203PSA 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 AMC1203PSA reliable?
The price and inventory of AMC1203PSA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AMC1203PSA is usually 5 days.
3.What payment methods are accepted for AMC1203PSA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AMC1203PSA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AMC1203PSA?
AMC1203PSA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AMC1203PSA 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 AMC1203PSA?
For technical support, including AMC1203PSA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AMC1203PSA requirements.
6.How does Aetrix verify that AMC1203PSA is sourced from the original manufacturer or authorized distributors?
All AMC1203PSA 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 AMC1203PSA meets industry standards.
7.What is the process for return or replacement of AMC1203PSA?
All AMC1203PSA units undergo pre-shipment inspection (PSI). If there is an issue with AMC1203PSA, 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 AMC1203PSA part is unused and in its original packaging.
Return procedure for AMC1203PSA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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