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Texas Instruments ISO102
- Part No.:
- ISO102
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 24-CDIP (0.600", 15.24mm), 16 Leads
- Datasheet:
-
ISO102.pdf
- Description:
- IC OPAMP ISOLATION 1 CIRC 16CDIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,531
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Product details
Overview
ISO102 from Burr-Brown is a hermetic, capacitive-coupled isolation buffer amplifier designed for high-voltage analog signal isolation in industrial measurement systems. It provides 1500Vrms continuous isolation, ±10V input/output range, 70kHz small-signal bandwidth, and 14-bit linearity in a 24-pin ceramic DIP package. It is used to isolate transducer signals in process control while rejecting ground-loop noise.
For engineers reviewing the ISO102 datasheet, ISO102 pinout, ISO102 application, or ISO102 equivalent, key selection criteria include its 1500Vrms isolation rating, 125dB min IMR at 60Hz, 14-bit linearity, ±10V analog range, and compatibility with ±10V to ±20V dual supplies - all critical for safe, accurate high-voltage sensor interfacing.
Technical Context
The ISO102 employs a voltage-controlled oscillator (VCO)–phase-locked loop (PLL) architecture with two internal 3pF high-voltage ceramic capacitors forming a differential isolation barrier. Its digital modulation scheme enables immunity to common-mode dV/dt up to 100V/µs, with transient recovery in ~50µs.
It features fully independent input and output stages powered by separate ±VCC1 and ±VCC2 supplies referenced to Common1 and Common2, respectively. The isolation barrier voltage appears across Common1–Common2, and no external components are required for basic operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 1500Vrms continuous AC (60Hz); 2121VDC - defines maximum working voltage across barrier in long-term operation |
| Isolation Breakdown | 4000Vrms for 10 seconds - confirms robustness against short-duration overvoltage stress |
| IMR @ 60Hz | 115–120dB minimum - ensures <1µVrms/V output error under 60Hz ground-noise coupling |
| Input/Output Range | ±10V rated, ±12V derated - supports full-scale industrial sensor outputs without clipping |
| Small-Signal BW | 70kHz - enables accurate capture of fast transients in motor control or power monitoring |
| Linearity Error | ±0.007% FSR - corresponds to ≤1.4mV deviation over ±10V span, enabling 14-bit system resolution |
| Reference Outputs | +4.975V to +5.025V (Ref1 & Ref2) - stable 5V references for bipolar offset setting and signal conditioning |
Pinout & Package
ISO102 is housed in a 24-pin side-brazed ceramic DIP (package drawing #208), 600mil wide, with industry-standard dimensions except for missing pins between input and output sections to support automated insertion and maximize creepage/clearance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 23, 24 | ±VCC1 / Common1 | Input stage power rails and analog reference ground - must be decoupled locally with 0.1µF ceramics |
| 11–14, 16, 21, 22 | VIN, VOUT, Offset, Gain Adjust, Reference1, Reference2 | Analog signal and calibration interface - Reference1 must be strapped to Offset for basic operation |
| 3, 4, 9, 10, 15 | C1, C2, Digital Common, Common2 | Bandwidth control nodes and output-stage reference - C1/C2 set filter rolloff; Digital Common isolates digital return currents |
| 17–20 | ±VCC2 | Output stage power rails - electrically isolated from VCC1; requires separate decoupling |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic ceramic barrier | Two 3pF tungsten-thick-film capacitors sealed in solder-cavity hybrid - achieves >10kV dielectric strength and 10¹⁴Ω barrier resistance |
| No external components required | Complete isolation circuit integrated - eliminates discrete modulator, demodulator, and filter design effort |
| 100% HV breakdown tested | Each unit screened at 4000Vrms/10s - guarantees reliability in safety-critical industrial deployments |
| Adjustable gain & offset | ±1.5% gain and ±150mV offset trim via external potentiometers - enables field calibration without redesign |
| High IMR with frequency scaling | 125dB at 60Hz dropping to 80dB at 100kHz - allows predictable noise rejection across power-line and switching frequencies |
Applications
| Industrial Process Control | 4–20mA Loop Isolation |
|---|---|
Use Scenario: Isolating thermocouple or RTD signals in chemical plant temperature monitoring where input grounds float at ±1kV relative to control room earth. IC Role / Device Role / Timing Role: Signal isolation buffer with unity gain and ±10V range - preserves millivolt-level accuracy while blocking ground-potential differences. Use Value: Eliminates measurement drift caused by ground loops; enables direct connection to ADCs without level-shifting or guard driving. | Use Scenario: Breaking galvanic continuity in analog current loops feeding PLC analog inputs in factory automation cabinets. IC Role / Device Role / Timing Role: High-impedance input / low-impedance output isolation amplifier - accepts 4–20mA loop voltage drop without loading, delivers clean ±10V to downstream circuitry. Use Value: Prevents fault propagation between loop-powered sensors and centralized controllers; maintains loop integrity during surge events. |
| Motor & SCR Control Monitoring | Power Plant Monitoring |
Use Scenario: Measuring shunt voltage across IGBT gate drivers or motor phase legs operating at 600VDC bus potentials. IC Role / Device Role / Timing Role: High-dV/dt tolerant isolation amplifier - withstands >100V/µs transients and recovers in <50µs without latch-up. Use Value: Enables real-time current feedback in variable-frequency drives without optical isolation latency or LED aging concerns. | Use Scenario: Monitoring auxiliary DC bus voltages in turbine excitation systems where sensor grounds sit at 1.2kV above station ground. IC Role / Device Role / Timing Role: Hermetically sealed isolation barrier - prevents partial discharge degradation under continuous 1500Vrms stress at elevated ambient temperatures. Use Value: Supports 20+ year field life in unattended power infrastructure with zero maintenance or recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISO122 | Higher 4000Vrms isolation rating; 20kHz BW; laser-trimmed 0.005% max nonlinearity | Targeted at precision medical instrumentation requiring tighter gain stability and lower noise | Select ISO122 only when >2500Vrms working voltage or sub-10ppm/°C gain drift is mandatory |
| AMC1301 | Replaces capacitive barrier with reinforced SiO₂ isolation; 7kVrms rating; 20MHz signal bandwidth | Designed for modern current sensing in inverters with integrated delta-sigma modulation and digital output | Choose AMC1301 for new designs needing SPI interface, higher bandwidth, or RoHS-compliant monolithic construction |
Compared with ISO122 and AMC1301, the ISO102 offers proven hermetic reliability at 1500Vrms with minimal external components, making it optimal for legacy industrial retrofits and environments where long-term parametric stability outweighs digital integration needs.
Availability
ISO102 is available at Aetrix Electronics and suitable for industrial process control, motor control monitoring, and power plant monitoring requiring stable component supply and long-lifecycle support.
Supply support for ISO102 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
Burr-Brown Corporation was a U.S.-based analog IC designer acquired by Texas Instruments in 2000, known for high-precision amplifiers, data converters, and isolation products.
The ISO102 belongs to Burr-Brown's capacitive isolation amplifier family, engineered specifically for rugged, high-voltage analog signal transmission in harsh industrial environments where galvanic isolation and long-term stability are critical.
FAQ
What is the maximum continuous isolation voltage rating for the ISO102?
The ISO102 is rated for 1500Vrms continuous isolation at 60Hz and 2121VDC. This rating is verified by 100% production testing at 4000Vrms for 10 seconds. The isolation barrier consists of two 3pF high-voltage ceramic capacitors with >10kV dielectric strength, ensuring reliable operation in industrial settings where sustained high-voltage differentials exist between input and output grounds.
Does the ISO102 require external components to function as an isolation amplifier?
No, the ISO102 is a complete isolation solution requiring no external components for basic operation. All functional blocks - including input VCO, differential ceramic barrier, PLL decoder, and second-order output filter - are integrated into the 24-pin ceramic DIP. Only local 0.1µF ceramic bypass capacitors on each supply rail are recommended per the datasheet to ensure stable operation and optimal IMR performance.
How does the ISO102 achieve high isolation-mode rejection (IMR) at 60Hz?
The ISO102 achieves ≥115dB IMR at 60Hz through its differential capacitive barrier architecture and internal synchronous demodulation. The two matched 3pF ceramic capacitors reject common-mode barrier voltage changes, while the PLL-based decoding rejects amplitude-modulated interference. Its IMR degrades predictably with frequency (e.g., 80dB at 100kHz), allowing designers to select appropriate bandwidth-limiting capacitors (C1/C2) for target noise environments.
Can the ISO102 be used with supply voltages other than ±15V?
Yes, the ISO102 operates over a supply range of ±10V to ±20V for both VCC1 and VCC2. Performance specifications (gain error, offset, bandwidth) are guaranteed at ±15V, but functional operation is maintained across the full range. Quiescent current varies only modestly - e.g., +VCC1 draws +11 to +15mA and –VCC1 draws –9 to –12mA - enabling flexible power system design in multi-rail industrial equipment.
What is the purpose of the C1 and C2 pins on the ISO102?
The C1 and C2 pins connect to internal nodes of the ISO102's second-order Butterworth output filter. Adding external capacitance (C2 = 2×C1) reduces small-signal bandwidth - e.g., 100pF/200pF yields ~7kHz flat response - to improve dynamic range and reduce residual carrier ripple. With no external caps, the ISO102 delivers full 70kHz bandwidth. These pins must be shielded from high electric fields to preserve AC IMR, as specified in the layout guidelines.
ISO102 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 24-CDIP (0.600", 15.24mm), 16 Leads
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- Isolation
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 0.5V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 70 kHz
- Current - Input Bias:
- -
- Voltage - Input Offset:
- 25 mV
- Current - Supply:
- 25mA
- Current - Output / Channel:
- 5 mA
- Voltage - Supply Span (Min):
- 20 V
- Voltage - Supply Span (Max):
- 40 V
- Operating Temperature:
- -25°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 16-CDIP
ISO102 FAQ
1.How can I place an order for ISO102 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISO102 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 ISO102 reliable?
The price and inventory of ISO102 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISO102 is usually 5 days.
3.What payment methods are accepted for ISO102?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISO102 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISO102?
ISO102 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISO102 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 ISO102?
For technical support, including ISO102 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISO102 requirements.
6.How does Aetrix verify that ISO102 is sourced from the original manufacturer or authorized distributors?
All ISO102 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 ISO102 meets industry standards.
7.What is the process for return or replacement of ISO102?
All ISO102 units undergo pre-shipment inspection (PSI). If there is an issue with ISO102, 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 ISO102 part is unused and in its original packaging.
Return procedure for ISO102:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISO102 Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
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LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
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LM2904DGKR
Texas Instruments
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LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
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