ISO122JUG4 - 50 kHz Isolation Amplifier | Texas Instruments
料号： ISO122JUG4 ✓ 量产中ISO122JUG4 概述
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.
直接替换替代料： ISO122JUG4 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： ISO122JUG4 （相同外形与封装尺寸） ——差异在于 Package.
ISO122JUG4 最大额定值与电气特性
| Product Type | Isolation amplifier |
| Manufacturer | Texas Instruments |
| Bandwidth | 50 kHz |
| Circuit Count | 1 circuit |
| 封装 | 8-lead SOIC |
| Package Body Width | 0.295 inch (7.50 mm) |
| 安装类型 | Surface mount |
| Amplifier Category | Instrumentation amplifier |
| Isolation Function | Galvanic signal isolation |
ISO122JUG4 0.295 inch (7.50 mm) 引脚配置指南
ISO122JUG4（0.295 inch (7.50 mm) 封装）的引脚配置。 该模拟元件具有输入、输出和电源引脚。请参阅制造商数据手册以了解失调调零、补偿和使能引脚配置。适用于信号调理和放大器电路。
暂无详细引脚数据： ISO122JUG4.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ISO122JUG4 适用于 6 应用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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： ISO122JUG4 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | 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 |
关键差异点
- Confirmed 50 kHz signal bandwidth （对比 ISO122U)
- Single analog isolation circuit （对比 ISO122U)
- Documented 8-lead SOIC ordering configuration （对比 ISO122U)
设计说明
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.
合规信息
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.
