INA169NA/3K - 60V High-Side Current Sense Amplifier | TI
MPN： INA169NA/3K ✓ 啟用中INA169NA/3K 概覽
A current sense amplifier is an integrated circuit that measures the voltage drop across a shunt resistor placed in series with a load, converting it to a proportional output current or voltage. The INA169 is a variable gain current sense amplifier, meaning its gain is set by a single external resistor, providing design flexibility. It belongs to the family of current shunt monitors, which are essential for power management, battery monitoring, and load detection in electronic systems.
Key features of the INA169NA/3K include a wide input common-mode voltage range of 2.7V to 60V, a bandwidth of 440kHz, and a low quiescent current of 60µA (typical). The gain is set by a single resistor, allowing for precise scaling of the output. The device also features independent supply and input common-mode voltages, enabling operation with a lower supply voltage while sensing higher voltages. The SOT-23-5 package is ideal for portable and space-limited applications.
Technically, the INA169 uses a bipolar process to achieve high accuracy and stability. The input offset voltage is typically 1000µV (max), and the output is a current proportional to the differential input voltage divided by the external gain resistor. This architecture allows for high-side sensing without disrupting the ground path, which is critical in many power systems. The device is specified for operation over the -40°C to +125°C temperature range, making it suitable for industrial and automotive environments.
Typical applications include battery chargers, power supplies, motor control, and load monitoring in automotive and industrial systems. The INA169NA/3K is also used in portable devices where low quiescent current is essential. Its high bandwidth of 440kHz enables fast transient response, which is beneficial for detecting rapid load changes.
When designing with the INA169NA/3K, ensure the shunt resistor is placed on the high side and the gain resistor is selected to provide the desired output current range. The output can be converted to a voltage with a load resistor to ground. Proper PCB layout, including Kelvin connections to the shunt, is recommended for accurate measurements.
直接替換替代品，適用於 INA169NA/3K — 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： INA169NA/3K （相同外形與佔位） — 差異在於 Gain Setting, Output Type, Package, Quiescent Current, Operating Temperature Range.
INA169NA/250
✅ 直接替換📋 參考替代品（不在目錄中）
INA139NA/3K
✅ 直接替換聯絡詢價
查看資料表 →INA139NA/250
✅ 直接替換聯絡詢價
查看資料表 →INA169NA/3K
✅ 直接替換聯絡詢價
查看資料表 →INA169NA/250
✅ 直接替換📋 參考替代品（不在目錄中）
INA169NA/3K
✅ 直接替換聯絡詢價
查看資料表 →INA169NA/3K 最大額定值與電氣特性
| Supply Voltage Range | 2.7 V to 60 V |
| Common-Mode Voltage Range | 2.7 V to 60 V |
| Bandwidth | 440 kHz |
| 靜態電流 | 60 µA (typ) |
| Input Offset Voltage | 1000 µV (max) |
| Gain Setting | Single external resistor |
| 輸出類型 | Current |
| 封裝 | SOT-23-5 (DBV) |
| 腳位數 | 5 |
| 工作溫度範圍 | -40°C to +125°C |
| 安裝類型 | Surface Mount |
| RoHS 狀態 | Compliant |
| REACH Status | Compliant |
| AEC-Q100 Qualified | No |
| Lead-Free | Yes |
INA169NA/3K 腳位配置
| 腳位 1 | OUT — Output current, proportional to sensed voltage |
| 腳位 2 | GND — Ground |
| 腳位 3 | IN- — Negative input, connect to load side of shunt |
| 腳位 4 | IN+ — Positive input, connect to supply side of shunt |
| 腳位 5 | VS — Supply voltage, 2.7V to 60V |
典型應用
INA169NA/3K 適用於 6 應用s: Battery Management Systems, Power Supply Monitoring, Motor Control, Automotive Load Detection, Portable Electronics, Industrial Automation.
Battery Management Systems
The INA169NA/3K is ideal for battery management systems (BMS) in portable electronics and electric vehicles. Its wide common-mode range of 2.7V to 60V allows monitoring of battery packs with varying voltages. The low quiescent current of 60µA minimizes drain on the battery, and the high bandwidth of 440kHz enables fast detection of overcurrent conditions. The SOT-23-5 package fits compact BMS designs, and the single-resistor gain setting simplifies calibration for different shunt values.
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Power Supply Monitoring
In power supply designs, the INA169NA/3K provides accurate load current monitoring without interrupting the ground path. Its high-side sensing capability allows measurement of current flowing from the supply to the load, which is essential for detecting overloads and short circuits. The wide supply range of 2.7V to 60V makes it compatible with various power rails, from low-voltage logic supplies to industrial 48V systems. The 440kHz bandwidth ensures fast response to transient load changes, enabling protective actions.
推薦
Motor Control
The INA169NA/3K is well-suited for motor control applications, where monitoring the current drawn by the motor is critical for torque control and protection. Its high bandwidth of 440kHz allows accurate measurement of fast-changing motor currents, enabling real-time feedback for closed-loop control. The wide common-mode range supports sensing on the high side of the motor supply, which can be up to 60V. The low quiescent current is beneficial in battery-powered motor drives, and the small package fits compact motor controllers.
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Automotive Load Detection
In automotive systems, the INA169NA/3K is used for load detection and diagnostics, such as monitoring current in lighting circuits, solenoids, and sensors. Its wide temperature range of -40°C to +125°C ensures reliable operation in harsh automotive environments. The high-side sensing capability allows detection of open loads and short circuits without affecting the ground integrity. The device's small SOT-23-5 package is ideal for space-constrained automotive modules, and its low quiescent current helps reduce overall system power consumption.
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Portable Electronics
The INA169NA/3K is ideal for portable electronics such as smartphones, tablets, and wearables, where monitoring battery current is essential for power management. Its low quiescent current of 60µA is crucial for extending battery life. The wide common-mode range allows sensing on the battery rail, which can vary from 2.7V to 4.2V. The small SOT-23-5 package is perfect for space-constrained PCBs, and the single-resistor gain setting simplifies design. The 440kHz bandwidth enables fast detection of load changes, improving system responsiveness.
推薦
Industrial Automation
In industrial automation, the INA169NA/3K is used for monitoring current in PLCs, motor drives, and power distribution systems. Its wide supply range of 2.7V to 60V accommodates various industrial voltage levels, from 24V control systems to 48V servo drives. The high bandwidth of 440kHz allows accurate measurement of dynamic loads, enabling predictive maintenance and fault detection. The device's robust temperature range and small package make it suitable for industrial control boards, and its low quiescent current reduces power dissipation in always-on monitoring circuits.
推薦
推薦產品摘要
工程參考資料，適用於 INA169NA/3K — 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 | INA169NA/250 | INA139NA/3K | INA139NA/250 |
|---|---|---|---|---|
| Package | SOT-23-5 (DBV) | SOT-23-5 (DBV) | SOT-23-5 (DBV) | SOT-23-5 (DBV) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Supply Voltage Range | 2.7V to 60V | 2.7V to 60V | 2.7V to 60V | 2.7V to 60V |
| Bandwidth | 440kHz | 440kHz | 440kHz | 440kHz |
| Quiescent Current | 60µA | 60µA | 60µA | 60µA |
| Input Offset Voltage | 1000µV | 1000µV | 1000µV | 1000µV |
| Gain Setting | Single resistor | Single resistor | Single resistor | Single resistor |
| Operating Temperature | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C |
主要差異化特點
- Wide common-mode voltage range of 60V (對比INA139NA/3K)
- High bandwidth of 440kHz (對比INA139NA/3K)
- Low quiescent current of 60µA (對比INA139NA/3K)
設計說明
For accurate current sensing, use Kelvin connections to the shunt resistor to minimize parasitic resistance. Place the shunt close to the INA169 inputs and keep the trace lengths short. The gain resistor should be placed close to the OUT pin to reduce noise pickup.
The INA169NA/3K can operate with a supply voltage lower than the sensed common-mode voltage, as long as it is within 2.7V to 60V. Ensure the supply pin is bypassed with a 0.1µF ceramic capacitor to ground to filter high-frequency noise.
Do not exceed the absolute maximum ratings of 60V on any pin. The output current is limited by the external load resistor; ensure it is chosen to keep the output voltage within the specified range. Also, avoid connecting the output directly to a low-impedance load without a resistor, as this can cause excessive current.
合規資訊
RoHS and REACH compliant per TI product page. Not AEC-Q100 qualified; automotive variant INA169QPWRQ1 is available.
