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Texas Instruments AMC1200SDUB
- Part No.:
- AMC1200SDUB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SMD, Gull Wing
- Datasheet:
-
AMC1200SDUB.pdf
- Description:
- IC OPAMP ISOLATION 1 CIRC 8SOP
- Quantity:
- Payment:
- Shipping:
Inventory:723
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Product details
Overview
AMC1200SDUB from Texas Instruments is a fully-differential precision isolation amplifier with SiO₂ capacitive isolation barrier, optimized for shunt-based current sensing in high-voltage motor control and power conversion systems. It delivers ±250-mV input range, 8× fixed gain (±0.5% accuracy), 108 dB CMRR at DC, 60 kHz minimum bandwidth, and 4250 VPEAK isolation rating per UL1577 and VDE V 0884-10.
For engineers reviewing the AMC1200SDUB datasheet, AMC1200SDUB pinout, AMC1200SDUB application, or AMC1200SDUB equivalent, this page provides verified technical context, real-world use cases in motor drives and inverters, pin-level circuit roles, and validated alternative options for industrial current-sensing designs requiring galvanic separation and <1.5 mV offset error.
Technical Context
The AMC1200SDUB implements a second-order delta-sigma modulator on the high-side domain, digitizing differential analog inputs and transmitting the bitstream across an integrated SiO₂ capacitive barrier. Its low-side domain includes a third-order active low-pass filter and output buffer delivering a fully differential analog output (VOUTP/VOUTN) with nominal gain of 8.
Input common-mode voltage range spans –0.16 V to VDD1; output common-mode voltage self-adjusts to either 1.29 V (at 3.3 V VDD2) or 2.55 V (at 5 V VDD2). The device supports dual supply operation: 4.5–5.5 V on high-side (VDD1/GND1) and 2.7–5.5 V on low-side (VDD2/GND2), enabling compatibility with both 3.3-V and 5-V controller domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Voltage | 4250 VPEAK (AMC1200B grade), certified per UL1577 & VDE V 0884-10 - enables safe operation in 1200 VPEAK working voltage systems |
| Input Range | ±250 mV differential - directly interfaces standard shunt resistors without external scaling or attenuation |
| Fixed Gain | 8 × (±0.5% initial accuracy) - eliminates gain calibration in closed-loop current control loops |
| Offset Error | ±1.5 mV max over –40°C to +105°C - ensures sub-0.1% full-scale error in 250-mV-range sensing |
| CMRR | 108 dB at DC, 95 dB at 50 kHz - rejects high dv/dt noise from switching nodes in IGBT/MOSFET inverters |
| CMTI | ≥10 kV/µs - maintains signal integrity during fast transient events in motor drive half-bridges |
| Supply Current | 8 mA max on high-side (VDD1), 7 mA max on low-side (VDD2) - supports thermally constrained PCB layouts |
Pinout & Package
AMC1200SDUB uses an 8-pin SOP (Small Outline Package) with gull-wing leads, body size 9.50 mm × 6.57 mm, rated for extended industrial temperature range (–40°C to +105°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | High-side power supply | Provides 4.5–5.5 V to input-stage modulator and isolation barrier - must be isolated from low-side domain |
| VINP | Noninverting analog input | Accepts one side of shunt resistor voltage drop; referenced to GND1; limited to ±250 mV differential swing |
| VINN | Inverting analog input | Accepts opposite side of shunt resistor; forms differential pair with VINP - defines measurement polarity |
| GND1 | High-side analog ground | Return path for VDD1 and input circuitry; galvanically separated from GND2 by SiO₂ barrier |
| GND2 | Low-side analog ground | Return path for VDD2 and output stage; connects to controller/system ground domain |
| VOUTN | Inverting analog output | Differential output terminal; swings symmetrically with VOUTP around programmable common-mode voltage |
| VOUTP | Noninverting analog output | Differential output terminal; used with VOUTN to drive ADC inputs or instrumentation amplifiers |
| VDD2 | Low-side power supply | Supplies 2.7–5.5 V to output filter and driver - supports direct interface to 3.3-V or 5-V microcontrollers |
Key Features
| Feature | Design Value |
|---|---|
| SiO₂ capacitive isolation barrier | Immune to magnetic interference; achieves 4250 VPEAK isolation and ≥10 kV/µs CMTI without transformer or opto coupling |
| Self-adjusting output common-mode voltage | Automatically sets to ~1.29 V (at 3.3 V VDD2) or ~2.55 V (at 5 V VDD2) - matches input range of most SAR or delta-sigma ADCs |
| Low-noise analog front-end | 3.1 mVRMS output noise - enables high-resolution current measurement down to <10-bit ENOB at 60 kHz BW |
| Extended temperature operation | Specified from –40°C to +105°C - suitable for under-hood automotive inverters and industrial motor drives |
| Integrated 2.5-V reference | Stable internal reference for delta-sigma modulator - eliminates need for external precision reference in shunt sensing path |
Applications
| Motor Control Phase Current Sensing | Photovoltaic Inverter DC-Link Monitoring |
|---|---|
|
Use Scenario: Real-time measurement of phase currents in three-phase PMSM or induction motor drives using low-value shunt resistors placed on inverter leg outputs. IC Role / Device Role / Timing Role: Isolation amplifier providing galvanically separated, low-latency (≤5.6 µs signal delay), differential analog output synchronized to PWM switching frequency. Use Value: Enables precise field-oriented control (FOC) with <1.5 mV offset error and 108 dB CMRR - reduces torque ripple and improves efficiency at partial load. |
Use Scenario: High-side current monitoring of DC-link in string inverters or battery energy storage systems operating up to 1000 VDC bus voltage. IC Role / Device Role / Timing Role: High-common-mode-voltage isolation amplifier interfacing shunt resistor between PV array/battery and inverter H-bridge input. Use Value: Supports safe, accurate DC current measurement with 4250 VPEAK isolation and 1200 VPEAK working voltage - meets IEC 62109 and UL 1741 requirements. |
| Industrial UPS Output Current Protection | Frequency Inverter Motor Winding Monitoring |
|
Use Scenario: Continuous output current monitoring in online double-conversion uninterruptible power supplies to detect overload, short-circuit, or ground-fault conditions. IC Role / Device Role / Timing Role: Isolated analog sensor feeding protection logic and digital controller; operates continuously during mains failure and battery backup mode. Use Value: Delivers stable ±250-mV input range and <0.075% nonlinearity - ensures reliable trip thresholds across temperature and line voltage variations. |
Use Scenario: Embedded current sensing in variable-frequency drives for predictive maintenance, detecting winding imbalance or insulation degradation via harmonic analysis. IC Role / Device Role / Timing Role: Precision isolation amplifier capturing high-fidelity current waveforms up to 60 kHz bandwidth for FFT-based diagnostics. Use Value: Provides 3.1 mVRMS noise floor and 100 kHz small-signal bandwidth - preserves harmonic content up to 11th order for motor health assessment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AMC1301SDWVR | Higher CMTI (75 kV/µs), ±350-mV input range, 20-bit resolution delta-sigma output (digital), no analog output pins | Requires external digital isolator and MCU with sinc-filter or DSP capability; not pin-compatible | Select when system-level noise immunity >75 kV/µs is required and digital processing infrastructure exists |
| ISO124U | Transformer-based isolation, ±10-V input range, 1000 VRMS isolation, 10 kHz bandwidth, higher offset drift (±5 µV/°C) | Lower bandwidth limits use in high-speed motor control; requires external gain/level-shifting for shunt signals | Select for legacy analog-only systems where wide input range and transformer reliability are prioritized over bandwidth and offset stability |
Compared with AMC1200SDUB, AMC1301SDWVR offers superior transient immunity but demands digital signal chain redesign, while ISO124U provides broader input range but sacrifices bandwidth and DC accuracy - AMC1200SDUB remains optimal for cost-sensitive, analog-output-focused shunt sensing in 60-kHz-class motor drives.
Availability
AMC1200SDUB is available at Aetrix Electronics and suitable for motor control, photovoltaic inverters, and industrial UPS systems requiring stable component supply, long-term lifecycle support, and guaranteed traceability for safety-critical deployments.
Supply support for AMC1200SDUB 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 power applications.
The AMC1200 product line delivers precision galvanic isolation for current sensing, targeting high-efficiency motor drives, renewable energy inverters, and industrial power supplies where accuracy, safety certification, and thermal robustness are critical.
FAQ
What is the isolation rating of the AMC1200SDUB and which standards does it meet?
The AMC1200SDUB is rated for 4250 VPEAK isolation per UL1577 and VDE V 0884-10, with 1200 VPEAK maximum working voltage and ≥10 kV/µs common-mode transient immunity. It carries VDE certificate number 40016131 and UL file number E181974, confirming compliance for industrial and renewable energy applications requiring reinforced insulation.
Can the AMC1200SDUB operate with a 3.3-V low-side supply?
Yes, the AMC1200SDUB supports low-side supply voltages from 2.7 V to 5.5 V. At 3.3 V VDD2, its output common-mode voltage settles to 1.29 V (typical), and gain error remains within ±0.1% - enabling direct interface with 3.3-V ADCs without level-shifting circuitry.
What is the maximum differential input voltage the AMC1200SDUB can handle without clipping?
The AMC1200SDUB guarantees linear operation for differential input voltages within ±250 mV. Input clipping begins beyond ±320 mV, as specified in the Electrical Characteristics table. For reliable current sensing, design must constrain VINP–VINN to ±250 mV to maintain <0.075% nonlinearity and specified offset performance.
How does the AMC1200SDUB manage output common-mode voltage?
The AMC1200SDUB automatically adjusts its differential output common-mode voltage based on VDD2: ~1.29 V at 3.3 V supply and ~2.55 V at 5 V supply. This self-biasing eliminates external common-mode setting resistors and ensures optimal dynamic range when driving single-supply ADCs or instrumentation amplifiers.
Is the AMC1200SDUB pin-compatible with the AMC1200BDUB?
No - AMC1200SDUB and AMC1200BDUB share identical pinout and package (DUB), but differ in isolation rating: AMC1200SDUB is the standard-grade 4000 VPEAK version, while AMC1200BDUB is the enhanced 4250 VPEAK variant. Both are functionally identical otherwise and may be substituted only if the higher isolation rating is not required.
AMC1200SDUB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SMD, Gull Wing
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- Isolation
- Number of Circuits:
- 1
- Output Type:
- Differential
- Slew Rate:
- -
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 100 kHz
- Current - Input Bias:
- -
- Voltage - Input Offset:
- 200 µV
- Current - Supply:
- 5.4mA
- Current - Output / Channel:
- 20 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOP
AMC1200SDUB FAQ
1.How can I place an order for AMC1200SDUB through Aetrix?
Please submit a Request for Quotation (RFQ) for AMC1200SDUB 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 AMC1200SDUB reliable?
The price and inventory of AMC1200SDUB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AMC1200SDUB is usually 5 days.
3.What payment methods are accepted for AMC1200SDUB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AMC1200SDUB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AMC1200SDUB?
AMC1200SDUB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AMC1200SDUB 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 AMC1200SDUB?
For technical support, including AMC1200SDUB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AMC1200SDUB requirements.
6.How does Aetrix verify that AMC1200SDUB is sourced from the original manufacturer or authorized distributors?
All AMC1200SDUB 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 AMC1200SDUB meets industry standards.
7.What is the process for return or replacement of AMC1200SDUB?
All AMC1200SDUB units undergo pre-shipment inspection (PSI). If there is an issue with AMC1200SDUB, 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 AMC1200SDUB part is unused and in its original packaging.
Return procedure for AMC1200SDUB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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