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Texas Instruments ISO122JUE4
- Part No.:
- ISO122JUE4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 28-SOIC (0.295", 7.50mm Width), 8 Leads
- Datasheet:
-
ISO122JUE4.pdf
- Description:
- 10-V INPUT, VOLTAGE SENSING ISOL
- Quantity:
- Payment:
- Shipping:
Inventory:3,823
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Product details
Overview
ISO122JUE4 from Texas Instruments is a precision analog isolation amplifier with galvanic isolation via integrated 2-pF differential capacitive barrier, 1500 Vrms rated isolation voltage, 140 dB IMR at 60 Hz, ±10 V output swing, and 50 kHz small-signal bandwidth - used in industrial transducer signal conditioning where ground-loop elimination and high common-mode rejection are critical.
For engineers reviewing the ISO122JUE4 datasheet, ISO122JUE4 pinout, ISO122JUE4 application, or ISO122JUE4 equivalent, key selection criteria include verified 1500 Vrms isolation rating, bipolar ±4.5 V to ±18 V dual-supply operation, fixed unity-gain configuration, 0.020% maximum nonlinearity, and SOIC-28 package compatibility for high-density industrial PCB layouts.
Technical Context
The ISO122JUE4 employs duty-cycle modulation-demodulation across an embedded capacitive barrier, transmitting input signals digitally to eliminate barrier-dependent distortion. Its modulator integrates VIN/200 kΩ against a switched ±100 mA current source, generating a 500 kHz carrier-modulated waveform.
The demodulator recovers the analog output using a sense amplifier, switched-current integrator (A2), and sample-and-hold stages that suppress 500 kHz ripple. Laser-trimmed matching between input and output sections ensures <±0.05% gain error and <±20 µV/°C input offset drift over –25°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 1500 Vrms continuous - certified for safety-critical industrial isolation per UL/IEC standards |
| IMR @ 60 Hz | 140 dB - enables accurate measurement in noisy 60 Hz AC environments (e.g., motor drives) |
| Small-Signal Bandwidth | 50 kHz - supports fast analog signals including 4–20 mA loop diagnostics and thermocouple response |
| Nonlinearity | ±0.020% FSR - ensures high-fidelity DC-coupled signal transmission for precision sensor interfaces |
| Supply Range | ±4.5 V to ±18 V - allows flexible dual-rail design with ±15 V standard or low-voltage ±5 V operation |
| Output Drive | ±5 mA - sufficient to drive 2 kΩ loads or feed downstream instrumentation amplifiers directly |
| Quiescent Current | ±5.5 mA on VS2, ±5 mA on VS1 - enables low-power isolated sensing in battery-backed systems |
Pinout & Package
ISO122JUE4 is housed in a 28-lead SOIC (DVA) package measuring 20.01 mm × 6.61 mm, optimized for surface-mount assembly and creepage/clearance compliance in industrial PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | High-side analog input | Accepts ±10 V differential input referenced to GND1; current-input architecture enables overvoltage tolerance beyond supply rails |
| VOUT | Low-side analog output | Delivers ±10 V unity-gain output referenced to GND2; includes 20 mVp-p 500 kHz ripple requiring optional filtering |
| +VS1 / –VS1 | High-side analog supply | Provides power to input section; ±4.5 V to ±18 V range supports wide input signal headroom |
| +VS2 / –VS2 | Low-side analog supply | Power for output section; independent rail allows floating ground domains and eliminates shared-noise paths |
| GND1 | High-side ground reference | Reference node for VIN and VS1; must be physically separated from GND2 to maintain isolation barrier integrity |
| GND2 | Low-side ground reference | Reference node for VOUT and VS2; layout requires ≥8 mm clearance from GND1 per IEC 61000-4-5 |
Key Features
| Feature | Design Value |
|---|---|
| Digital modulation barrier | 2-pF differential capacitive isolation eliminates dielectric absorption and aging effects - ensures long-term gain stability |
| 100% high-voltage tested | Every unit screened at 2400 Vrms for partial discharge <5 pC - guarantees reliability under transient overvoltage stress |
| Bipolar operation | ±10 V output swing with ±4.5 V to ±18 V supplies - supports true bipolar sensor interfaces (e.g., RTDs, strain gauges) |
| Fixed unity gain | No external resistors required - reduces BOM count and layout sensitivity while maintaining ±0.05% gain accuracy |
| High-frequency transient immunity | Immune to dV/dt >1000 V/µs up to 250 kHz - prevents false triggering in SCR/motor control EMI environments |
Applications
| Transducer Isolation | Ground Loop Elimination |
|---|---|
|
Use Scenario: Isolating thermocouple or RTD signals in multi-node PLC backplanes where chassis grounds differ by >10 V. IC Role / Device Role / Timing Role: High-side VIN senses millivolt-level sensor output; low-side VOUT delivers noise-free ±10 V to ADC front-end. Use Value: 140 dB IMR rejects 60 Hz ground noise; 1500 Vrms rating protects downstream circuitry from fault currents. |
Use Scenario: Connecting 4–20 mA field transmitters to centralized DCS controllers across different building earth potentials. IC Role / Device Role / Timing Role: Breaks conductive ground path while preserving analog fidelity; operates at full 50 kHz bandwidth for loop diagnostics. Use Value: Eliminates measurement drift caused by ground potential differences >500 mV without signal attenuation. |
| Motor Control Feedback | Power Monitoring |
|
Use Scenario: Isolating phase current feedback in IGBT-based VFDs where switching dv/dt exceeds 1000 V/µs. IC Role / Device Role / Timing Role: High-side input monitors shunt voltage; low-side output feeds current regulator with <350 µs 0.01% settling. Use Value: Immunity to fast transients prevents false trips; 0.020% nonlinearity maintains torque control accuracy. |
Use Scenario: Measuring bus voltage in 600 V battery stacks for EV charging infrastructure or UPS systems. IC Role / Device Role / Timing Role: Senses high-voltage rail via resistive divider; provides isolated ±10 V representation to MCU ADC. Use Value: 1500 Vrms isolation meets IEC 61000-4-5 surge requirements; ±200 µV/°C offset drift ensures thermal stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AMC1301DWV | Replaces capacitive isolation with reinforced SiO2 barrier; 7000 Vpk rating; 20-bit resolution; requires external reference | Targeted at high-accuracy current sensing (shunt-based) rather than general-purpose voltage isolation | Choose AMC1301DWV when >0.3% system accuracy and 20-bit digital output are required; not drop-in for analog-output designs |
| ISO124P | Higher 2500 Vrms isolation; 100 kHz bandwidth; ±13 V output; 16-pin PDIP only - no SOIC option | Designed for high-voltage test equipment and medical imaging where extended creepage and higher bandwidth are mandatory | Choose ISO124P when 2500 Vrms certification or >50 kHz signal fidelity is needed; incompatible pinout and package |
Compared with ISO122JUE4, AMC1301DWV offers superior isolation voltage and digital output but demands redesign for reference and interface; ISO124P delivers higher bandwidth and isolation rating but lacks SOIC packaging and increases board area by 40%.
Availability
ISO122JUE4 is available at Aetrix Electronics and suitable for industrial process control, motor control feedback, and power monitoring requiring stable component supply across extended product lifecycles.
Supply support for ISO122JUE4 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 high-reliability isolation solutions.
The ISO122 product line was engineered specifically for cost-sensitive industrial isolation applications demanding precision, robustness, and ease of use - targeting transducer interfaces, ground-loop mitigation, and analog signal integrity in harsh EMI environments.
FAQ
What is the isolation voltage rating of the ISO122JUE4?
The ISO122JUE4 is rated for 1500 Vrms continuous isolation voltage and 100% tested to 2400 Vrms for partial discharge <5 pC. This rating complies with UL 1577 and IEC 60747-5-2 standards, making ISO122JUE4 suitable for reinforced insulation in industrial safety applications where transient overvoltage protection is critical.
Does the ISO122JUE4 require external components for basic operation?
No, the ISO122JUE4 operates in fixed unity-gain configuration with no external resistors or capacitors required. Only 1-µF tantalum bypass capacitors on each supply pin (+VS1, –VS1, +VS2, –VS2) are recommended per TI's layout guidelines. The ISO122JUE4's internal laser-trimmed architecture eliminates calibration components, reducing design complexity and BOM cost.
Can the ISO122JUE4 operate with single-supply voltages on either side?
The ISO122JUE4 requires dual ± supplies on both high-side (VS1) and low-side (VS2) - it does not support true single-supply operation. However, TI application note SBOA004 demonstrates generating a negative rail using a Zener diode on the high side, enabling operation from a single positive supply there. The low side still requires ±VS2 for bipolar output swing.
What is the maximum input signal frequency supported by the ISO122JUE4?
The ISO122JUE4 has a 50 kHz small-signal bandwidth and maintains linear response up to 250 kHz. Above 250 kHz, aliasing occurs due to its 500 kHz duty-cycle modulation carrier - output contains folded components below 250 kHz. For signals >250 kHz, the ISO122JUE4 behaves like a sampling amplifier, and designers must apply anti-aliasing filters before VIN.
How does the ISO122JUE4 handle high dV/dt transients across the isolation barrier?
The ISO122JUE4 exhibits high immunity to fast common-mode transients, with reliable operation up to 1000 V/µs. Beyond this rate, the sense amplifier may false-trigger, introducing spurious output errors. Reducing supply voltages to ±12 V or lower lowers effective dV/dt and restores clean operation - a documented mitigation technique validated in TI's SBOS160A datasheet.
ISO122JUE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 28-SOIC (0.295", 7.50mm Width), 8 Leads
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Isolation
- Number of Circuits:
- 1
- Output Type:
- Single-Ended
- Slew Rate:
- 2V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 50 kHz
- Current - Input Bias:
- -
- Voltage - Input Offset:
- 20 mV
- Current - Supply:
- 5.5mA
- Current - Output / Channel:
- 15 mA
- Voltage - Supply Span (Min):
- 9 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -25°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ISO122JUE4 FAQ
1.How can I place an order for ISO122JUE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISO122JUE4 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 ISO122JUE4 reliable?
The price and inventory of ISO122JUE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISO122JUE4 is usually 5 days.
3.What payment methods are accepted for ISO122JUE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISO122JUE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISO122JUE4?
ISO122JUE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISO122JUE4 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 ISO122JUE4?
For technical support, including ISO122JUE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISO122JUE4 requirements.
6.How does Aetrix verify that ISO122JUE4 is sourced from the original manufacturer or authorized distributors?
All ISO122JUE4 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 ISO122JUE4 meets industry standards.
7.What is the process for return or replacement of ISO122JUE4?
All ISO122JUE4 units undergo pre-shipment inspection (PSI). If there is an issue with ISO122JUE4, 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 ISO122JUE4 part is unused and in its original packaging.
Return procedure for ISO122JUE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISO122JUE4 Tags
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LM358DT
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LM358DR
Texas Instruments
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LM2904DR
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LM358ADR
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LM2904DGKR
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MCP6006T-E/OT
Microchip Technology
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MCP6006UT-E/OT
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LM324PWR
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