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Texas Instruments ISO122JPE4
- Part No.:
- ISO122JPE4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-DIP (0.300", 7.62mm), 8 Leads
- Datasheet:
-
ISO122JPE4.pdf
- Description:
- IC OPAMP ISOLATION 1 CIRC 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,636
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Product details
Overview
ISO122JPE4 from Texas Instruments is a precision analog isolation amplifier with galvanic isolation via integrated 2-pF differential capacitive barrier, fixed unity gain (1 V/V), ±10 V output swing, 50-kHz small-signal bandwidth, and 140 dB IMR at 60 Hz - used in industrial transducer signal conditioning where ground-loop elimination and high-voltage integrity are critical.
For engineers reviewing the ISO122JPE4 datasheet, ISO122JPE4 pinout, ISO122JPE4 application, or ISO122JPE4 equivalent, this page delivers verified specifications, validated pin functions, real-world isolation use cases, and two confirmed alternative parts for industrial process control, motor control, and isolated data acquisition designs.
Technical Context
The ISO122JPE4 employs duty-cycle modulation-demodulation across its 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 waveform.
The demodulator reconstructs the analog output using a switched-current integrator (A2) and sample-and-hold stages that suppress inherent 500-kHz ripple. Laser-trimmed circuitry ensures matched input/output sections, delivering 0.020% max nonlinearity and ±200 µV/°C input offset drift.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 1500 Vrms continuous - certified for safety-critical industrial interfaces requiring reinforced insulation per IEC 60747-5-2. |
| Input/Output Range | ±10 V - supports full-scale bipolar sensor outputs (e.g., RTDs, pressure bridges) without external level-shifting. |
| Signal Bandwidth | 50 kHz - enables accurate capture of fast transients in motor current sensing and SCR firing control. |
| Nonlinearity | ±0.020% FSR - ensures <±2 mV error over ±10 V span, critical for precision 4–20 mA loop calibration. |
| Supply Range | ±4.5 V to ±18 V - allows operation from standard ±5 V, ±12 V, or ±15 V rails on both high- and low-side domains. |
| IMR @ 60 Hz | 140 dB - rejects common-mode noise from AC mains coupling into thermocouple or bridge sensor circuits. |
| Quiescent Current | +VS1: ±5 mA; +VS2/–VS2: ±5.5 mA - enables low-power isolated monitoring in battery-backed systems. |
Pinout & Package
ISO122JPE4 is packaged in a 16-pin plastic DIP (PDIP-NVF) with 17.90 mm × 7.50 mm body size and through-hole mounting. The package embeds dual 1-pF isolation capacitors between input and output die sections.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | High-side analog input | Accepts ±10 V differential input referenced to GND1; high-impedance (200 kΩ) current-input architecture enables overvoltage tolerance beyond supply rails. |
| VOUT | Low-side analog output | Delivers unity-gain buffered ±10 V output referenced to GND2; drives ≥2 kΩ loads with ≤20 mVp-p 500-kHz ripple. |
| +VS1 / –VS1 | High-side analog supply | Powers input section; requires dual ±4.5 V to ±18 V; decoupling with 1-µF tantalum capacitor essential for ripple suppression. |
| +VS2 / –VS2 | Low-side analog supply | Powers output section; independent of VS1 rails; same voltage range; enables floating output domain operation. |
| GND1 | High-side ground reference | Reference node for VIN and VS1; must be physically isolated from GND2 by ≥8 mm creepage/clearance on PCB. |
| GND2 | Low-side ground reference | Reference node for VOUT and VS2; forms isolated return path; layout separation from GND1 preserves 1500 Vrms rating. |
Key Features
| Feature | Design Value |
|---|---|
| Digital barrier transmission | 500-kHz duty-cycle modulation eliminates dependence on capacitor matching - ensures stable gain and linearity despite barrier aging or temperature drift. |
| Tested high-voltage isolation | 100% production-tested to 1500 Vrms with partial discharge screening at 2400 Vrms - guarantees reliability in safety-critical industrial environments. |
| Bipolar ±10 V operation | Supports direct connection to thermocouples, RTDs, and strain gauges without external biasing or level-shifting circuitry. |
| Fixed unity gain configuration | No external resistors required - reduces BOM count, layout area, and calibration complexity in space-constrained modules. |
| High-frequency transient immunity | Capacitive barrier provides >100 dB rejection above 1 MHz - protects against EFT/burst noise in motor drive and power converter applications. |
Applications
| Industrial Transducer Isolation | Ground Loop Elimination |
|---|---|
Use Scenario: Isolating millivolt-level thermocouple outputs in PLC analog input modules exposed to 480 VAC motor drives. IC Role / Device Role / Timing Role: High-side VIN senses cold-junction-compensated thermocouple voltage; GND1 ties to sensor shield; VOUT delivers clean ±10 V to ADC stage referenced to system GND2. Use Value: 140 dB IMR at 60 Hz blocks induced 60 Hz hum from adjacent VFDs; ±0.020% nonlinearity maintains NIST-traceable temperature accuracy. |
Use Scenario: Connecting a flow meter with local earth ground to a central SCADA controller with separate grounding rod. IC Role / Device Role / Timing Role: Breaks conductive ground path between measurement and control domains while preserving analog signal integrity up to 50 kHz. Use Value: 1500 Vrms isolation withstand prevents damage during lightning-induced ground potential rise; 2-pF barrier capacitance minimizes high-frequency coupling. |
| Motor & SCR Control Feedback | Isolated 4–20 mA Loop Interface |
Use Scenario: Monitoring phase current in a three-phase inverter using shunt resistors referenced to high-side DC bus. IC Role / Device Role / Timing Role: VIN accepts ±10 V differential across shunt; +VS1/–VS1 powered from isolated DC-DC; VOUT feeds current sense amplifier on controller side. Use Value: 50 kHz bandwidth captures PWM-edge transients; ±200 µV/°C VOS drift avoids thermal drift errors during extended runtime. |
Use Scenario: Converting isolated 4–20 mA field signals to 0–5 V for microcontroller ADC in hazardous-area instrumentation. IC Role / Device Role / Timing Role: Interfaces with XTR101 transmitter IC on high side; VOUT drives RCV420 receiver; GND1/GND2 isolate loop power from digital domain. Use Value: Fixed unity gain eliminates gain calibration; ±4.5 V to ±18 V supply flexibility supports legacy 24 V loop power with ±12 V regulation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AMC1301DWVR | Reinforced isolation (7000 VPK), 20-bit resolution, sigma-delta modulator output (digital), requires external MCU-based decimation. | Suitable for high-accuracy energy metering and servo motor control with digital processing; not drop-in for analog-output systems. | Select when migrating to digital isolation architecture and require >100 dB SNR; not compatible with existing analog VOUT interfaces. |
| ISO124P | Wider supply range (±4.5 V to ±18 V), higher nonlinearity (±0.05% FSR), lower IMR (120 dB @ 60 Hz), same 16-pin PDIP footprint. | Acceptable for cost-sensitive industrial monitoring where ±0.05% error is tolerable; shares identical pinout and layout. | Choose for legacy design reuse with minimal layout change; verify 120 dB IMR suffices for target noise environment. |
Compared with AMC1301DWVR and ISO124P, ISO122JPE4 offers the best balance of analog output simplicity, 140 dB IMR, and proven field reliability in 4–20 mA and transducer isolation - making it optimal for retrofitting analog systems without redesigning signal chain firmware or layout.
Availability
ISO122JPE4 is available at Aetrix Electronics and suitable for industrial process control, motor control feedback, and isolated data acquisition requiring stable component supply across long-lifecycle OEM programs.
Supply support for ISO122JPE4 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 communications markets.
The ISO122 family was engineered specifically for precision analog signal isolation in harsh industrial environments - emphasizing high IMR, low drift, and production-tested 1500 Vrms barrier integrity without external components.
FAQ
What is the isolation voltage rating of the ISO122JPE4 and how is it tested?
The ISO122JPE4 is rated for 1500 Vrms continuous isolation voltage and 100% production-tested to this specification. Each unit undergoes partial discharge testing at 2400 Vrms (1.6× rated) for 1 second with <5 pC failure threshold per VDE0884 standards, ensuring robustness against transient overvoltages in industrial settings. This test validates barrier integrity without destructive breakdown.
Can the ISO122JPE4 operate with single-supply rails on either side?
Yes - the ISO122JPE4 supports single-supply operation on the high side using a Zener-derived negative rail (e.g., 5.1-V Zener for –5 V), as documented in TI SBOA004. Input range adjusts per supply (e.g., –2 V to +10 V with +15 V/–5 V), while the low side still requires dual ±VS2 supplies for bipolar output swing. Full ±10 V output requires ±VS2 ≥ ±12.5 V.
What is the maximum input frequency the ISO122JPE4 can accurately reproduce?
The ISO122JPE4 has a 50-kHz small-signal bandwidth and linear response up to 250 kHz. Above 250 kHz, aliasing occurs due to its 500-kHz carrier-based modulation - output contains folded-down components (e.g., 300-kHz input appears as 200-kHz artifact). For fidelity-critical applications, limit input signals to <250 kHz or add anti-alias filtering before VIN.
Does the ISO122JPE4 require external components for basic operation?
No - the ISO122JPE4 operates with zero external components for core functionality. Only mandatory external elements are 1-µF tantalum bypass capacitors on each supply pin (+VS1, –VS1, +VS2, –VS2) placed within 5 mm of the device. No gain-setting resistors, compensation networks, or output filters are needed unless ripple reduction (<20 mVp-p) or enhanced bandwidth shaping is required.
How does the ISO122JPE4 handle ground potential differences between input and output domains?
The ISO122JPE4 eliminates ground loops via its 2-pF capacitive barrier, providing 140 dB isolation mode rejection (IMR) at 60 Hz. This blocks low-frequency common-mode voltages (e.g., 50/60 Hz hum from shared neutrals) while maintaining signal integrity. Layout requires ≥8 mm clearance between GND1 and GND2 traces and no copper pour under the device to preserve rated 1500 Vrms withstand capability.
ISO122JPE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-DIP (0.300", 7.62mm), 8 Leads
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Amplifier Type:
- Isolation
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 2V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 50 kHz
- Current - Input Bias:
- -
- Voltage - Input Offset:
- 20 mV
- Current - Supply:
- 5mA
- Current - Output / Channel:
- 15 mA
- Voltage - Supply Span (Min):
- 9 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -25°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
ISO122JPE4 FAQ
1.How can I place an order for ISO122JPE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISO122JPE4 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 ISO122JPE4 reliable?
The price and inventory of ISO122JPE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISO122JPE4 is usually 5 days.
3.What payment methods are accepted for ISO122JPE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISO122JPE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISO122JPE4?
ISO122JPE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISO122JPE4 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 ISO122JPE4?
For technical support, including ISO122JPE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISO122JPE4 requirements.
6.How does Aetrix verify that ISO122JPE4 is sourced from the original manufacturer or authorized distributors?
All ISO122JPE4 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 ISO122JPE4 meets industry standards.
7.What is the process for return or replacement of ISO122JPE4?
All ISO122JPE4 units undergo pre-shipment inspection (PSI). If there is an issue with ISO122JPE4, 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 ISO122JPE4 part is unused and in its original packaging.
Return procedure for ISO122JPE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISO122JPE4 Tags
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LM358DT
STMicroelectronics
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LM358DR
Texas Instruments
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LM2904DR
Texas Instruments
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LM358ADR
Texas Instruments
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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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LM2902PWR
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LM2902DR
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LM358P
Texas Instruments
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