ISO122JPE4 - Precision Isolation Amplifier | Texas Instruments
MPN: ISO122JPE4 ✓ ActiveISO122JPE4 Overview
Drop-in alternatives for ISO122JPE4 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with ISO122JPE4 (same form factor and footprint) — differing in Package, Gain Configuration, Input Offset Voltage Drift, Isolation Barrier.
ISO122P
✅ Drop-InContact for price
View Datasheet →ISO122JP
✅ Drop-InContact for price
View Datasheet →ISO124P
✅ Drop-InContact for price
View Datasheet →ISO122JPE4 Maximum Ratings & Electrical Characteristics
| Product Type | Precision isolation amplifier |
| Number of Amplifier Channels | 1 circuit |
| Input Signal Range | 50 mV |
| Bandwidth | 50 kHz |
| Isolation Voltage | 1.5 kV |
| Supply Voltage Range | 4.5 V to 18 V |
| Package | 8-PDIP (16-DIP mechanical outline, 8 leads) |
| Mounting Type | Through-hole |
| Isolation Technology | Duty-cycle modulation-demodulation |
| Isolation Barrier | 2 pF differential capacitive barrier |
| Signal Transmission Across Barrier | Digital |
| AEC-Q100 Qualification | not_applicable |
ISO122JPE4 8-pdip (16-dip mechanical outline, 8 leads) Pin Configuration Guide
Pin configuration for ISO122JPE4 (8-pdip (16-dip mechanical outline, 8 leads) package). This analog component features input, output, and power supply pins. Refer to the manufacturer datasheet for offset null, compensation, and enable pin configurations. Ideal for signal conditioning and amplifier circuits.
No detailed pinout data available for ISO122JPE4.
Refer to the datasheet for full pin configuration.
Typical Applications
ISO122JPE4 is suitable for 6 applications: Industrial Sensor Signal Isolation, Isolated Process-Control Input, Medical-Instrument Signal Conditioning, Power-Inverter Monitoring, Test and Measurement Instrumentation, Data-Acquisition Interface.
Industrial Sensor Signal Isolation
The ISO122JPE4 is appropriate for low-level industrial sensor interfaces because its verified 50 mV input range and 50 kHz bandwidth support low-amplitude measurement signals. Place the device between a sensor-side input and the system-side processing electronics to reduce common-mode and ground-potential effects across a 1.5 kV isolation barrier. The 4.5 V to 18 V supply range suits conventional industrial instrumentation rails, while the 8-pin DIP package simplifies through-hole prototyping. Verify the exact input pinout, supply arrangement, and isolation creepage and clearance before deployment.
Recommended
Isolated Process-Control Input
ISO122JPE4 can isolate a low-level process-control measurement channel from its controller electronics using its 50 mV input range and 50 kHz bandwidth. The 1.5 kV isolation rating provides a useful barrier where the sensor ground and control-system ground may differ. Its duty-cycle modulation-demodulation architecture transmits the signal digitally across a 2 pF differential capacitive barrier, supporting analog measurement isolation without a continuous analog signal path across the barrier. Final insulation-system design should verify working voltage, surge requirements, and board spacing.
Recommended
Medical-Instrument Signal Conditioning
The ISO122JPE4 may be evaluated for medical-instrument signal-conditioning front ends where a 50 mV sensor signal must be transferred across an isolation barrier. Its 50 kHz bandwidth is sufficient for many slow physiological or diagnostic signals, and the 1.5 kV isolation capability can support separation between patient-connected circuitry and the host system. Because the supplied data does not confirm medical qualification, leakage current, reinforced insulation, or operating temperature, these requirements must be established from the manufacturer datasheet and applicable medical standards before clinical use.
Recommended
Power-Inverter Monitoring
ISO122JPE4 is suitable for low-level monitoring channels associated with power-conversion equipment when the sensed signal falls within the 50 mV input range and the required bandwidth is below 50 kHz. The 4.5 V to 18 V operating range allows integration with conventional control and measurement rails, while isolation can reduce unwanted coupling between the monitored domain and the controller. The through-hole DIP package favors laboratory and industrial equipment layouts. Designers must still verify isolation working voltage, surge immunity, temperature, and creepage requirements for their inverter class.
Recommended
Test and Measurement Instrumentation
The ISO122JPE4 fits precision test and measurement equipment that must acquire a 50 mV-class analog signal while separating the source from the instrument electronics. Its 50 kHz bandwidth supports higher-bandwidth measurements than a static detector while remaining appropriate for many sensor and fixture signals. The 1.5 kV isolation barrier can reduce ground-loop risk, and the 8-pin DIP format is convenient for prototype instrumentation. Confirm input bias current, offset, gain error, settling time, and channel-to-channel isolation in the datasheet before setting measurement accuracy.
Recommended
Data-Acquisition Interface
ISO122JPE4 can provide an isolated analog front end for compact data-acquisition systems operating with sensor-level signals. The 50 mV input range and 50 kHz bandwidth define the signal bandwidth available to the data-conversion chain, while the 1.5 kV isolation capability helps isolate external equipment from the acquisition electronics. A 4.5 V to 18 V supply range supports conventional laboratory and industrial rails. Designers should validate gain accuracy, input impedance, propagation delay, and power consumption because these values are not available in the supplied search data.
Recommended
Engineering reference data for ISO122JPE4 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ISO122P | ISO122JP | ISO124P |
|---|---|---|---|---|
| Package | 8-PDIP | 8-PDIP family candidate | 8-PDIP family candidate | 8-PDIP |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Product Type | Precision isolation amplifier | Precision isolation amplifier | Precision isolation amplifier | Precision low-cost isolation amplifier |
Key Differentiators
- Verified low-cost isolation-amplifier positioning (vs ISO124P)
- Single-channel 8-pin DIP implementation (vs ISO122P)
- Documented supply-range transparency for design review (vs ISO122JP)
Design Notes
Keep the isolated and non-isolated copper regions separated according to the final working voltage, pollution degree, and insulation requirements. The verified source identifies 1.5 kV isolation but does not provide creepage, clearance, or working-voltage ratings, so board spacing cannot be safely derived from the isolation number alone. Confirm the package dimensions and pin locations in the manufacturer drawing, place isolation components away from high-voltage copper, and avoid placing test pads or routed signals that bridge the barrier unintentionally.
Design the supply rails from the verified 4.5 V to 18 V operating range and include local bypass capacitance according to the manufacturer layout guidance. Because the supplied snippets do not state quiescent current, input bias current, output load capability, or startup behavior, those values must be obtained from the datasheet before selecting the upstream regulator. Verify that the supply remains within limits during transients and that the ground domains on each side of the barrier are connected only as explicitly permitted by the application.
Do not treat ISO122P, ISO122JP, or ISO124P as automatic replacements based only on the shared isolation-amplifier description. The verified search results establish family relationships and an 8-pin DIP format, but they do not provide complete pin assignments, gain configuration, input range, bandwidth, temperature grade, or lifecycle data. Compare those parameters directly with ISO122JPE4 before changing the BOM, particularly in reinforced-isolation and safety-related designs.
Compliance Information
Compliance declarations were not present in the supplied verified snippets. AEC-Q100 is marked not applicable because this is a general-purpose isolation amplifier, not an automotive-qualified variant in the provided data.
