ISO103B - Internally Powered Isolation Amplifier | Texas Instruments
MPN： ISO103B ✗ 停產ISO103B 概覽
An isolation amplifier is a type of instrumentation amplifier that transfers a signal across a galvanic barrier while preventing conductive current from flowing between the input and output domains. This protects sensitive measurement equipment from high common-mode voltages, ground faults, and potentially hazardous electrical environments. The ISO103B belongs to the broader signal-chain and isolation-IC hierarchy rather than a conventional non-isolated operational amplifier.
Key features include integrated signal and power handling in one double-wide, 0.6-inch side-brazed package; 5600 Vpk test voltage; 1500 Vrms continuous AC barrier rating; and a specified 20 kHz small-signal and full-power bandwidth. The internally powered architecture simplifies system design by reducing the number of external isolation-supply components. The 16-terminal CDIP package is intended for through-hole industrial and laboratory equipment.
Technically, the device combines an isolated input stage, isolation barrier, and output amplifier. Its bandwidth limits the fastest transient and signal behavior, while its continuous barrier rating addresses sustained AC isolation rather than only a short-duration production test. Designers must consider the complete isolation path, creepage, clearance, barrier insulation, and the datasheet pinout before applying the part to a high-voltage installation.
Typical uses include current and voltage measurement, process-control instrumentation, data acquisition, power-supply feedback isolation, laboratory signal conditioning, and industrial sensor interfaces. The 20 kHz bandwidth is appropriate for many measurement signals but not for high-frequency communications or waveform systems requiring greater bandwidth.
A critical design consideration is to preserve the intended isolation barrier and avoid unintended copper bridges or leakage paths. PCB layout, creepage, clearance, input filtering, grounding, and the package’s mechanical orientation must be reviewed against the manufacturer datasheet.
This page consolidates verified manufacturer and distributor information, package details, isolation specifications, comparison fields, and practical design guidance to support component selection without fabricating missing electrical values.
直接替換替代品，適用於 ISO103B — 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： ISO103B （相同外形與佔位） — 差異在於 Mounting Type, Product Type.
此產品無可直接替換的替代品。
申請替代品ISO103B 最大額定值與電氣特性
| Product Type | Internally powered isolation amplifier |
| Circuit Count | 1 circuit |
| Small-Signal Bandwidth | 20 kHz |
| Full-Power Bandwidth | 20 kHz |
| Test Voltage | 5600 Vpk |
| Continuous AC Barrier Rating | 1500 Vrms |
| Isolation Barrier | Galvanic isolation between input and output domains |
| Power Architecture | Internally powered |
| 封裝 | 16-CDIP |
| Package Construction | Double-wide 0.600-inch side-brazed package |
| 安裝類型 | Through-hole |
| Terminal Count | 16 terminals |
ISO103B double-wide 0.600-inch side-brazed package 腳位配置指南
ISO103B（double-wide 0.600-inch side-brazed package 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： ISO103B.
請參閱 資料表 以查看完整腳位配置。
典型應用
ISO103B 適用於 6 應用s: Industrial Process Instrumentation, Data Acquisition Systems, Power-Supply Feedback Isolation, Laboratory Sensor Conditioning, Industrial Control Signal Interfaces, High-Voltage Measurement Protection.
Industrial Process Instrumentation
The ISO103B fits industrial process instrumentation where a sensor signal must be transferred across a high common-mode voltage or ground-potential difference. Its 20 kHz small-signal and full-power bandwidth supports many process signals, while the 1500 Vrms continuous AC barrier rating and 5600 Vpk test voltage address isolation requirements. Use it between a field-side sensor and a grounded controller, with input protection and filtering selected for the actual sensor. The 16-CDIP package is mechanically robust but requires through-hole layout space.
推薦
Data Acquisition Systems
The ISO103B is appropriate for a laboratory or industrial data-acquisition front end when the measured input must remain electrically separated from the acquisition electronics. A 20 kHz bandwidth is useful for general-purpose analog measurement channels rather than high-speed sampling. The internal-powered isolation architecture can simplify the isolated signal chain, while the wide input signal range should be verified against the sensor and front-end limits. Add input filtering, shielding, and calibrated grounding to prevent unwanted coupling.
推薦
Power-Supply Feedback Isolation
The ISO103B can be evaluated for power-supply feedback paths where the controller ground and output stage are at substantially different potentials. Its internally powered isolation function can reduce the number of isolation-supply components, and the 20 kHz bandwidth is suitable for many supervisory feedback loops that do not require high-frequency compensation information. Validate loop stability, propagation delay, input range, and isolation capacitance in the complete converter design before production use.
推薦
Laboratory Sensor Conditioning
The ISO103B is useful in laboratory measurement equipment that must interface a sensor to analog circuitry without sharing the same galvanic ground. The 20 kHz full-power bandwidth supports many pressure, temperature, strain, and slow dynamic measurements, provided the complete signal path does not require a faster response. The device’s isolation barrier should be combined with shielded cabling, low-leakage input protection, and careful analog grounding. Its through-hole 16-CDIP construction is practical for custom laboratory instruments but consumes substantial board area.
推薦
Industrial Control Signal Interfaces
The ISO103B can provide isolation for analog control or monitoring signals that cross between high-energy equipment and a controller. Its 5600 Vpk test voltage and 1500 Vrms continuous AC barrier rating provide the verified isolation figures needed for initial architecture selection, while the 20 kHz bandwidth is compatible with many monitoring signals. The application must still define input filtering, surge protection, fault response, and safety insulation. Avoid treating the test voltage as a substitute for a continuous working-voltage analysis.
推薦
High-Voltage Measurement Protection
The ISO103B is relevant to high-voltage measurement systems where direct conductive connection would expose the measurement electronics to hazardous or unstable potentials. Its specified isolation barrier can help separate the measured domain, but the designer must ensure that the complete assembly satisfies the required creepage, clearance, insulation, and fault-current limits. The internally powered architecture is useful for reducing system complexity, while the 20 kHz bandwidth limits it to signals whose frequency content is sufficiently low. Production validation should include dielectric, noise, and fault-condition testing.
推薦
推薦產品摘要
工程參考資料，適用於 ISO103B — 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 | ISO103 |
|---|---|---|
| Product Type | Internally powered isolation amplifier | Isolation amplifier |
| Manufacturer | Texas Instruments | Texas Instruments |
| Package | 16-CDIP | 24-CDIP |
| Pin Count | 16 terminals | 24 terminals |
| Small-Signal Bandwidth | 20 kHz | 20 kHz listed in cross-reference result |
主要差異化特點
- Wide specified isolation ratings (對比ISO103)
- Internally powered isolation architecture (對比ISO103)
- Defined measurement bandwidth (對比ISO103)
設計說明
Treat the isolation barrier as a controlled PCB structure. Keep the input-side and output-side copper regions separated according to the manufacturer’s creepage and clearance requirements, remove accidental copper bridges, and verify the completed layout under the intended working voltage. The supplied data confirms a 1500 Vrms continuous AC barrier rating and 5600 Vpk test voltage, but those figures do not replace an application-specific insulation-safety calculation.
Do not substitute ISO103 for ISO103B without a redesign. The supplied cross-reference data describes ISO103 as a 24-CDIP part, while ISO103B is a 16-CDIP part. The differing terminal counts and package geometry invalidate a same-footprint drop-in assumption. If the functional requirements are similar, evaluate ISO103 only in a new PCB layout and against its complete manufacturer datasheet.
Keep the 20 kHz bandwidth requirement consistent with the complete signal path. Sensor lead length, input capacitance, filtering, isolation capacitance, output loading, and PCB parasitics can affect usable bandwidth and isolation performance. Add filtering close to the protected input where appropriate, and validate the assembled design with the intended source impedance and cable environment rather than relying only on the amplifier’s headline bandwidth.
合規資訊
The supplied verified snippets do not establish RoHS, REACH, lead-free, halogen-free, conflict-minerals, or automotive qualification status.
