ISO120G-BI - 60 kHz Precision Isolation Amplifier | Texas Instruments
料号： ISO120G-BI ✗ 停产ISO120G-BI 概述
An isolation amplifier is a type of instrumentation amplifier that separates an input signal from its output reference by galvanic isolation. This category sits within instrumentation amplifiers, analog signal-chain ICs, interface ICs, and broader semiconductor systems. It is useful when the measured node is at a hazardous or high-potential voltage, or when ground differences between connected equipment could otherwise disrupt signal measurement or damage downstream circuitry.
The verified ISO120 family information identifies a 1500 Vrms isolation rating, high input common-mode rejection at 60 Hz, user control of carrier frequency, and maximum nonlinearity of 0.01%. The ISO120 and ISO121 families can achieve precision operation without external components at 60 kHz bandwidth. Adding two external capacitors permits guaranteed precision specifications of 0.01% maximum nonlinearity and 150 uV/°C maximum voltage-offset drift with a reduced 6 kHz bandwidth.
The ISO120G-BI is intended for analog instrumentation, industrial measurement interfaces, current-sensing systems, data-acquisition equipment, and isolated sensor front ends. Its 60 kHz signal bandwidth supports measurements that need more response than a slow precision-only configuration, while the 0.01% nonlinearity specification helps preserve amplitude accuracy. Carrier-frequency control provides an additional design consideration because filter selection, system emissions, and synchronization can be affected by the modulation scheme.
Designers should use the manufacturer datasheet for the exact pin names, isolation creepage and clearance dimensions, recommended input and output networks, and supply arrangements. The input signal range, supply voltages, input offset voltage, input impedance, output impedance, and isolation lifetime were not supplied in the verified excerpts and therefore require confirmation before schematic release. Verify that the selected 16-lead footprint, isolation rating, bandwidth, nonlinearity, and package dimensions meet the final system requirements.
This product page consolidates the verified manufacturer description, distributor package and inventory information, family-level isolation and precision characteristics, drop-in replacement findings, and practical selection considerations. It distinguishes confirmed ISO120 family data from parameters that still require datasheet verification, helping engineers avoid assigning unsupported precision, safety, or lifecycle assumptions.
直接替换替代料： ISO120G-BI ——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： ISO120G-BI （相同外形与封装尺寸） ——差异在于 Package, Carrier Frequency, Product Type, Nonlinearity, Number of Circuits.
ISO120G
✅ 直接替换联系询价
查看数据手册 →ISO120G
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →ISO120BG
✅ 直接替换联系询价
查看数据手册 →ISO120SG
✅ 直接替换联系询价
查看数据手册 →ISO120G-BI 最大额定值与电气特性
| Product Type | Precision isolation amplifier |
| Number of Circuits | 1 circuit |
| Signal Bandwidth | 60 kHz |
| Rated Isolation Voltage | 1500 Vrms |
| Maximum Nonlinearity | 0.01% |
| Precision Configuration Bandwidth | 6 kHz |
| Maximum Voltage-Offset Drift | 150 uV/°C |
| Input Common-Mode Rejection | High at 60 Hz |
| Carrier Frequency | User controlled |
| Operation | Bipolar |
| Partial Discharge Qualification | 100% tested |
| 封装 | 16-lead CDIP |
| Package Pitch | 7.62 mm |
| Package Length | 0.300 inch |
| 安装类型 | Through-hole |
| External Components for 60 kHz Bandwidth | None required |
| External Capacitors for Guaranteed Precision | 2 capacitors |
| Lifecycle Recommendation | Not recommended for new designs |
ISO120G-BI 0.300 inch 引脚配置指南
ISO120G-BI（0.300 inch 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： ISO120G-BI.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ISO120G-BI 适用于 6 应用s: Industrial Process Measurement, High-Voltage Sensor Interface, Power-Inverter Current Sensing, Data-Acquisition Instrumentation, Medical Equipment Signal Isolation, Isolated Communications Interface.
Industrial Process Measurement
The Texas Instruments ISO120G-BI fits isolated industrial process-measurement front ends that must convey a low-level analog measurement across a 1500 Vrms barrier. Its 60 kHz bandwidth handles dynamic process signals without requiring the 6 kHz precision configuration, while the 0.01% maximum nonlinearity specification supports amplitude accuracy. The 16-lead CDIP package is also useful in through-hole industrial instrumentation. Designers should verify input range, supply voltage, common-mode limits, and isolation dimensions before finalizing the circuit.
推荐
High-Voltage Sensor Interface
ISO120G-BI can isolate a high-voltage sensor signal from the low-voltage electronics that acquire or process it. The verified 1500 Vrms isolation rating provides a defined separation level, and the 60 kHz bandwidth allows the channel to respond to changing sensor conditions. Its 0.01% maximum nonlinearity is beneficial when the system must preserve measurement amplitude. Input bias current, input voltage range, and the exact protection network still require confirmation from the manufacturer documentation before implementation.
推荐
Power-Inverter Current Sensing
The ISO120G-BI is applicable to isolated current-sensing channels in power-conversion equipment when the measurement amplifier must withstand a large voltage difference between the shunt and controller ground. Its 60 kHz bandwidth can support switching-frequency-related measurement content, while 0.01% maximum nonlinearity helps retain current information. The 1500 Vrms rating must be checked against the working voltage, surge environment, and applicable creepage and clearance rules. Shielding and layout remain important to prevent conducted noise from corrupting the sensed signal.
推荐
Data-Acquisition Instrumentation
For laboratory and industrial data-acquisition systems, ISO120G-BI can isolate multiplexed or dedicated analog channels from the acquisition circuitry. The 60 kHz operating bandwidth supports faster measurements than the 6 kHz filtered precision mode, and the specified 0.01% maximum nonlinearity helps maintain consistency across channels. Two external capacitors may be added when the guaranteed 150 uV/°C maximum offset-drift and 0.01% nonlinearity conditions at 6 kHz are preferred. Reference grounding, input filtering, and channel calibration should be designed with the exact datasheet limits.
推荐
Medical Equipment Signal Isolation
ISO120G-BI can provide an isolated analog measurement path in medical and diagnostic equipment where patient-connected circuitry must be separated from downstream electronics. Its 1500 Vrms isolation rating and 0.01% maximum nonlinearity are useful starting parameters, while the 60 kHz bandwidth allows measurement of physiological signals with more bandwidth than the 6 kHz precision configuration. These ratings alone do not establish medical-device compliance; designers must additionally validate applicable patient-protection, creepage, clearance, leakage, and risk-control requirements.
推荐
Isolated Communications Interface
ISO120G-BI is suitable for analog communication interfaces that require a high-impedance or high-voltage measurement to cross a galvanic barrier, such as line-current monitoring or transducer interfaces. The 60 kHz bandwidth accommodates a wider range of dynamic signals, and the carrier-frequency architecture must be coordinated with downstream filters. The 16-lead CDIP package favors through-hole laboratory and industrial equipment rather than compact mixed-signal modules. Engineers should validate long-term isolation reliability and PCB pollution-degree requirements before deployment.
推荐
工程参考数据： ISO120G-BI ——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 | ISO120G | ISO120 | ISO120BG | ISO120SG |
|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Product Type | Precision isolation amplifier | Precision isolation amplifier | Precision isolation amplifier | Precision isolation amplifier | Precision isolation amplifier |
关键差异点
- Family-specific 60 kHz bandwidth without external components （对比 ISO121G)
- Lower verified isolation rating than ISO121G （对比 ISO121G)
- 16-lead CDIP distribution format （对比 ISO121G)
设计说明
Use the official package drawing and pin table before laying out the 16-lead CDIP footprint. The verified distributor excerpt specifies a 0.300-inch, 7.62 mm CDIP, but it does not expose individual pin functions or detailed land patterns. Confirm row spacing, pin length, and mechanical tolerances against the manufacturer drawing. Maintain the isolation barrier's required creepage and clearance with no low-voltage copper, solder mask, or conductive keepouts crossing the protected region.
Choose between the 60 kHz no-external-component mode and the 6 kHz precision mode according to the required measurement bandwidth. According to the verified family documentation, two external capacitors allow 0.01% maximum nonlinearity and 150 uV/°C maximum offset drift to be guaranteed at 6 kHz. Place the required capacitors directly at their specified pins and use the manufacturer's filter values; changing carrier-frequency or feedback settings without the recommended network can alter accuracy and frequency response.
Do not treat ISO121G as a drop-in replacement merely because both devices are precision isolation amplifiers. The verified manufacturer information states that ISO120 and ISO121 differ in package size and isolation rating: ISO120 is rated at 1500 Vrms and ISO121 at 3500 Vrms. Also note that the TI support result identifies ISO120G as not recommended for new designs, so production continuity and migration should be reviewed rather than assuming that a same-family ordering option solves the lifecycle issue.
合规信息
The verified excerpts describe 100% partial-discharge testing for the ISO120 family but do not provide extracted RoHS, REACH, lead-free, halogen-free, or conflict-minerals declarations. AEC-Q100 is not applicable because ISO120G-BI is presented as an industrial precision isolation amplifier rather than an automotive-qualified ordering option.
