ISO122JUG4 - 50 kHz Isolation Amplifier | Texas Instruments
MPN： ISO122JUG4 ✓ 啟用中ISO122JUG4 概覽
An isolation amplifier is an amplifier with two electrically separated sides: an input side connected to the sensed signal and an output side connected to the host electronics. This separation can help protect sensitive measurement circuitry from high common-mode voltages and reduce the need for a direct ground connection between different portions of an industrial system. Within the broader semiconductor hierarchy, ISO122JUG4 is an analog integrated circuit, an isolation amplifier, an instrumentation signal-conditioning component, and a power-management-adjacent interface device for protected measurement systems.
The verified product information identifies the ISO122JUG4 as a 50 kHz isolation amplifier with one circuit in an 8-SOIC package. The 8-lead surface-mount format supports compact PCB layouts while providing separate input-side and output-side connections. The verified distributor records also identify the device as a Texas Instruments isolation amplifier. Detailed electrical characteristics such as supply voltage, isolation rating, gain configuration, input impedance, output offset, common-mode rejection, and temperature range were not included in the supplied data and therefore must be confirmed against the manufacturer datasheet before design release.
A 50 kHz bandwidth is appropriate for many industrial analog signals, including current-transformer outputs, voltage-derived measurements, and feedback loops requiring isolation. The bandwidth should be compared with the required signal bandwidth and phase margin; a signal that approaches the device's upper frequency limit may require additional consideration because the total system response includes the isolation amplifier, sensing network, input and output filters, and load. No gain or filter values are inferred here because the provided sources do not specify them.
Typical uses include isolated current measurement in power supplies, industrial process-control interfaces, motor-drive sensing, medical-instrument signal acquisition, and communication equipment requiring an isolation barrier. In these applications, the device can interface a floating sensor to a grounded controller while preserving the functional separation between high-energy and low-energy circuits. The system's isolation requirements, creepage, clearance, and reinforced-insulation targets must still be evaluated independently of signal bandwidth.
The most important design step is to obtain and review the official ISO122 datasheet before assigning the supply rails, external gain components, input network, output filter, and isolation layout. Because the supplied sources establish the device type, 50 kHz bandwidth, single-circuit configuration, and 8-SOIC package, but do not provide a complete electrical table or pin mapping, no unsupported pin names or voltage ratings are asserted in this record.
This page consolidates verified distributor pricing, package information, source links, and practical application context into one engineering-oriented reference. It also distinguishes what is confirmed from what remains datasheet-dependent, helping engineers evaluate ISO122JUG4 without confusing similar isolation products or unrelated digital isolators with this analog isolation amplifier.
直接替換替代品，適用於 ISO122JUG4 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： ISO122JUG4 （相同外形與佔位） — 差異在於 Package.
ISO122JUG4 最大額定值與電氣特性
| Product Type | Isolation amplifier |
| Manufacturer | Texas Instruments |
| Bandwidth | 50 kHz |
| Circuit Count | 1 circuit |
| 封裝 | 8-lead SOIC |
| Package Body Width | 0.295 inch (7.50 mm) |
| 安裝類型 | Surface mount |
| Amplifier Category | Instrumentation amplifier |
| Isolation Function | Galvanic signal isolation |
ISO122JUG4 0.295 inch (7.50 mm) 腳位配置指南
ISO122JUG4（0.295 inch (7.50 mm) 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： ISO122JUG4.
請參閱 資料表 以查看完整腳位配置。
典型應用
ISO122JUG4 適用於 6 應用s: Isolated Industrial Current Sensing, Power-Supply Feedback Isolation, Motor-Drive Current Monitoring, Industrial Process-Sensor Interface, Medical-Instrument Signal Acquisition, Communications Equipment Signal Conditioning.
Isolated Industrial Current Sensing
ISO122JUG4 fits isolated current-measurement paths that operate below the device's verified 50 kHz bandwidth. Its single-circuit analog isolation-amplifier function can condition a sensor signal while keeping the measurement side separated from grounded controller electronics. The 8-lead SOIC package supports a compact surface-mount layout. Before deployment, verify the sensor signal range, required gain, common-mode voltage, supply rails, and isolation category against the manufacturer datasheet, because those values were not included in the supplied data.
推薦
Power-Supply Feedback Isolation
The ISO122JUG4 can be considered for power-conversion feedback signals whose relevant content remains within 50 kHz. Placing an analog isolation amplifier between a floating power stage and a controller may help preserve the intended galvanic separation while conveying the feedback measurement. The implementation must account for loop bandwidth, propagation delay, output filtering, and component tolerances. Supply voltage, gain range, and common-mode limits require confirmation in the official ISO122 datasheet before control-loop tuning.
推薦
Motor-Drive Current Monitoring
ISO122JUG4 is applicable to motor-drive current monitoring when the measured waveform components of interest fall below 50 kHz. The one-circuit isolation-amplifier arrangement can connect a floating shunt or sensor interface to a controller without requiring the measurement domain and control domain to share the same reference potential. Motor systems demand careful grounding and surge-control planning; verify transient immunity, common-mode range, creepage, clearance, and propagation behavior using the complete manufacturer electrical data.
推薦
Industrial Process-Sensor Interface
The ISO122JUG4's confirmed 50 kHz bandwidth suits many low-to-medium-bandwidth industrial process signals when a floating sensor must feed grounded instrumentation. Its 8-lead SOIC package is useful for compact analog front ends, while the isolation-amplifier topology helps maintain separate high- and low-side circuitry. Engineers should calculate the complete signal-chain bandwidth, confirm input and output ranges, and validate galvanic-isolation requirements. Those electrical and safety details must be sourced from the datasheet because they are absent from the supplied distributor snippets.
推薦
Medical-Instrument Signal Acquisition
ISO122JUG4 may be evaluated for low-bandwidth medical-instrument signal acquisition when the required waveform is below 50 kHz and the device's documented isolation, safety, and leakage characteristics satisfy the applicable requirements. Its single analog isolation circuit can help separate a patient-connected measurement front end from downstream processing electronics. This application must not be approved from the package and bandwidth information alone; review the complete datasheet, applicable medical standards, isolation rating, leakage behavior, and system risk controls.
推薦
Communications Equipment Signal Conditioning
ISO122JUG4 can support analog conditioning in communications equipment where a signal below 50 kHz must cross an isolation boundary. The 50 kHz bandwidth allows many baseband or slow-control measurements, while the 8-lead SOIC format simplifies compact board placement. The system designer must still evaluate noise, gain accuracy, settling behavior, isolation capacitance, grounding, and external filtering. Only bandwidth, circuit count, and package are confirmed in the provided sources, so remaining claims must be validated from the official manufacturer documentation.
推薦
推薦產品摘要
工程參考資料，適用於 ISO122JUG4 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | ISO122U |
|---|---|---|
| Brand | Texas Instruments | Texas Instruments |
| Package | 8-lead SOIC | 8-lead SOIC - package match indicated by family comparison |
| Product Type | Isolation amplifier | Isolation amplifier |
主要差異化特點
- Confirmed 50 kHz signal bandwidth (對比ISO122U)
- Single analog isolation circuit (對比ISO122U)
- Documented 8-lead SOIC ordering configuration (對比ISO122U)
設計說明
Keep the isolated input-side and output-side copper regions separated according to the datasheet's isolation-layout guidance. Do not route high-voltage or high-current paths beneath the device, and avoid placing decoupling or signal traces across the isolation boundary. Maintain the specified creepage and clearance distances using the package dimensions and the applicable working-voltage category. The supplied data confirms the 8-lead SOIC package but does not provide the isolation dimensions, so PCB spacing must be calculated from the official datasheet and relevant safety requirements.
Treat the 50 kHz ISO122JUG4 bandwidth as an upper limit for the complete analog signal path, not merely a nominal bandwidth isolated from external circuitry. Sensor impedance, input filtering, gain components, output loading, and downstream converter input capacitance can each alter the realized response. Simulate or measure the assembled channel rather than relying only on the IC specification, and verify settling behavior if the signal contains low-frequency content or the application uses feedback control.
Confirm the ISO122JUG4's supply-voltage range and whether both isolated sides require separate supplies before committing PCB power architecture. Decoupling values, permitted ESR, startup behavior, and bypass placement must follow the manufacturer datasheet. Do not infer supply requirements from general isolation-amplifier practice, because ISO122-family variants can differ in gain and supply implementation. Where the data sheet calls for isolation-rated or safety capacitors, place them only on the side and in the position specified by the reference circuit.
Do not substitute a digital isolator for ISO122JUG4 merely because both provide isolation. ISO122JUG4 is an analog isolation amplifier, so the replacement must also reproduce the analog signal path, gain structure, bandwidth, supply arrangement, and pinout. Likewise, do not treat ISO122U as an automatic substitution until its package dimensions and electrical table have been compared. Confirm exact ordering-code suffix, lead geometry, isolation rating, and gain configuration before production release.
合規資訊
The supplied Full-Electronic result included a RoHS field but did not provide its value. No explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status was available, so every field remains unknown.
