INA223AIDSKR - 26V Zero-Drift Current Sense Amplifier | TI
料号： INA223AIDSKR ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1.66 | $1.66 |
| 10 | $1.49 | $14.90 |
| 100 | $1.28 | $128.00 |
| 500 | $1.08 | $540.00 |
| 1,000 | $0.94 | $940.00 |
INA223AIDSKR 概述
A current sense amplifier is a specialized differential amplifier that measures the voltage drop across a shunt resistor to derive load current, and often bus voltage and power, in a power rail. It sits within the power management IC hierarchy as a current and power monitoring device, distinct from regulators or converters because it measures rather than controls energy flow. High-side and low-side placement options let designers choose between ground-path integrity and load-drop immunity.
Key features of the INA223AIDSKR include bi-directional current measurement, which supports both charging and discharging current monitoring in battery systems; zero-drift architecture, which minimizes offset drift over temperature for accurate readings; programmable gain, allowing a single shunt value to cover multiple current ranges; and simultaneous current, bus voltage, and instantaneous power outputs on analog pins.
The zero-drift chopper-stabilized front end delivers DC accuracy that conventional amplifiers cannot match across the automotive-industrial temperature span, while the analog output interface allows direct connection to an ADC input or comparator without serial bus programming overhead. The 0 V to 26 V common-mode range makes the device tolerant of rail transients above its own 5.5 V supply.
Typical applications include battery charge and discharge monitoring in portable equipment, server and telecom power rail supervision, and power-budget telemetry in industrial automation systems where analog outputs feed system controllers or watchdog circuits.
Design consideration: choose the shunt resistance to balance full-scale drop (typically 50 mV to 100 mV at maximum load) against power dissipation, and use Kelvin connections at the shunt to preserve the accuracy offered by the zero-drift input stage.
This page synthesizes distributor pricing, drop-in variant cross-references, and practical design notes not found in the manufacturer datasheet.
直接替换替代料： INA223AIDSKR ——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： INA223AIDSKR （相同外形与封装尺寸） ——差异在于 Architecture, Output Type, Package, Product Type.
快速对比工具——选择替代料号进行并排对比：
INA223AIDGSR
✅ 直接替换📋 参考替代料（不在目录中）
INA223AIDSKR 最大额定值与电气特性
| Product Type | Current Shunt and Voltage Monitor with Analog Output |
| Common-Mode Voltage Range | 0 V to 26 V |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Sensing Configuration | High-Side / Low-Side, Bi-Directional |
| 输出类型 | Analog (voltage output) |
| Architecture | Zero-Drift Series |
| Measured Parameters | Current, Bus Voltage, Instantaneous Power |
| 工作温度范围 | -40C to +105C |
| 封装 | 10-WSON / 10-SON (2.5 mm x 2.5 mm) with Exposed Pad (DSK) |
| 安装类型 | Surface Mount |
| 引脚数 | 10 |
INA223AIDSKR 10-wson / 10-son (2.5 mm x 2.5 mm) with exposed pad (dsk) 引脚配置指南
INA223AIDSKR（10-wson / 10-son (2.5 mm x 2.5 mm) with exposed pad (dsk) 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： INA223AIDSKR.
请参阅 数据手册 以查看完整引脚配置。
典型应用
INA223AIDSKR 适用于 6 应用s: Battery Charge/Discharge Monitoring, Server and Telecom Power Rail Supervision, Industrial Automation Power Telemetry, Portable and Wearable Device Power Budgeting, Solar and Renewable Energy Monitoring, Test and Measurement Instrumentation.
Battery Charge/Discharge Monitoring
The INA223AIDSKR fits battery monitoring because it is bi-directional: one shunt in the battery pack lead captures both charging and discharging current, with the device resolving polarity on its analog outputs. Its 0 V to 26 V common-mode range covers single-cell Li-ion up to multi-cell and 12 V/24 V battery buses, while the 2.7 V to 5.5 V supply lets it run directly from a 3.3 V system rail. The zero-drift architecture keeps offset low across -40C to +105C, so coulomb-counting and overcurrent thresholds remain accurate as the pack heats and cools. Connect the current and bus-voltage outputs to the system microcontroller ADC or to comparators for autonomous overcurrent protection, avoiding any serial-bus dependency in the power path.
推荐
Server and Telecom Power Rail Supervision
Data-center and telecom boards densely pack 12 V and intermediate-bus rails, and the INA223AIDSKR supervises them at common-mode voltages up to 26 V while powered from a local 3.3 V or 5 V supply. The simultaneous current, bus voltage, and instantaneous power outputs allow baseboard controllers to log real power draw per rail with one shunt and three ADC channels. The 10-SON 2.5 mm x 2.5 mm footprint with exposed pad fits tight board real estate near hot-swap connectors and power stages. Because the outputs are analog, hot-swap comparators can react to overcurrent within microseconds without waiting for an I2C poll, improving fault containment. The industrial -40C to +105C rating tolerates elevated inlet-air temperatures in modern rack enclosures.
推荐
Industrial Automation Power Telemetry
Factory controllers and IO modules increasingly report per-load power budgets, and the INA223AIDSKR provides the measurement front end: current, bus voltage, and instantaneous power on analog outputs that feed a PLCs ADC or an isolated measurement channel. Its 26 V common-mode ceiling covers standard 24 V industrial buses with margin, and high-side placement keeps the ground path intact for downstream sensors. The zero-drift front end preserves measurement accuracy in electrically noisy cabinets where offset drift would otherwise corrupt low-current readings over the -40C to +105C ambient span. Gain programmability lets one shunt value serve both light idle-current logging and peak-load capture, simplifying BOM standardization across a product family.
推荐
Portable and Wearable Device Power Budgeting
In smartphones, tablets, and wearables, the INA223AIDSKR measures current into SoC and RF power amplifiers so firmware can build accurate power-consumption profiles. The 2.5 mm x 2.5 mm WSON-10 package with exposed pad minimizes board area and provides a low-inductance shunt connection, while the analog outputs tie directly into a host PMIC ADC with no bus transactions or standby configuration overhead. The devices low operating supply range (2.7 V to 5.5 V) and bi-directional sensing support both battery discharge and charge-current profiling with a single shunt. Zero-drift accuracy ensures microamp-scale sleep currents remain resolvable, which is essential for extending battery-life estimates that consumers see on screen.
推荐
Solar and Renewable Energy Monitoring
Solar charge controllers and micro-inverter auxiliary rails need continuous string or battery current visibility, and the INA223AIDSKR delivers it with a 26 V common-mode range that accommodates 12 V and 24 V PV battery buses. The bi-directional analog outputs distinguish charge current flowing into the battery from discharge current into the load, enabling a single-shunt topology that reduces shunt cost and measurement error stacking. Its zero-drift architecture maintains accuracy through wide diurnal temperature swings from -40C to +105C, and the analog power output can feed a simple scaling network to the systems telemetry ADC. Designers should shield the IN+/IN- Kelvin traces from switching nodes of the DC-DC converter stage.
推荐
Test and Measurement Instrumentation
Bench supplies, load meters, and automated test equipment benefit from the INA223AIDSKRs analog current, voltage, and power outputs, which can be digitized by the instruments precision ADC or routed to hardware comparators for fast trip response. The programmable gain allows one instrument front end to span multiple current decades by switching shunt-to-gain configuration without changing the shunt resistor, preserving burden-voltage characteristics across ranges. The zero-drift input stage provides the DC precision expected in instrumentation, with minimal offset drift across the -40C to +105C specified range. The 26 V common-mode rating allows direct placement on output rails up to 24 V, and the small WSON-10 footprint suits probe-head and channel-card geometries.
推荐
推荐产品汇总
工程参考数据： INA223AIDSKR ——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 | INA223AIDGSR | INA226AIDGSR | INA219AIDCNR |
|---|---|---|---|---|
| Package | 10-WSON (DSK) 2.5x2.5, exposed pad | 10-WSON (DSK) 2.5x2.5 - same | VSSOP-10 - different (not drop-in) | SOT-23-8 - different (not drop-in) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Output Interface | Analog (voltage outputs) | Analog - same | Digital I2C/SMBus, 16-bit | Digital I2C |
| Common-Mode Voltage | 0 V to 26 V | 0 V to 26 V | 0 V to 36 V | 0 V to 26 V |
| Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 3 V to 5.5 V |
| Sensing Direction | Bi-directional, high/low-side | Bi-directional, high/low-side | Bi-directional, high/low-side | Bi-directional, high/low-side |
| Resolution / Gain | Programmable analog gain | Programmable analog gain - same | 16-bit digital | 12-bit digital, lower precision |
关键差异点
- Analog output with zero firmware overhead （对比 INA226AIDGSR)
- Integrated instantaneous power output （对比 INA219AIDCNR)
- Zero-drift architecture over industrial temperature range （对比 INA223AIDGSR)
设计说明
Use Kelvin (4-wire) connections at the shunt resistor: route the IN+ and IN- traces directly from the shunt pads, not from shared current-carrying copper. Even a few milliohms of trace resistance introduces gain error proportional to load current. Keep the IN+/IN- pair as a tightly coupled differential pair, and place the INA223AIDSKR within a few millimeters of the shunt. The exposed pad under the WSON-10 should be tied to GND for thermal and grounding performance.
Decouple the VS pin with a 0.1 uF ceramic capacitor placed within 2 mm of the pin, plus a bulk 1 uF if the supply rail is long. The device can be powered from a 3.3 V or 5 V rail independent of the monitored bus (up to 26 V common-mode), which allows monitoring a 12 V or 24 V bus from a logic supply. Verify the shunt power dissipation: at 100 mV full-scale and 10 A, the shunt dissipates 1 W - size the resistor accordingly.
Route the analog output traces away from switching-node and gate-drive nets; if the outputs must cross a noisy region, add an RC filter (for example 100 ohm / 10 nF) close to the receiving ADC input. Estimated: a 100 ohm / 10 nF filter sets a pole at roughly 160 kHz, well above the monitor signal bandwidth for DC-current telemetry while rejecting switching-frequency ripple. Maintain a solid ground plane beneath the analog outputs to minimize loop area.
Do not exceed the 26 V common-mode rating on IN+/IN- even transiently without verifying system-level surge protection; bus transients from inductive loads can exceed the rating during hot-plug events. Also confirm the ordering suffix: INA223AIDSKR and INA223AIDGSR are the same die with different reel quantities, but INA226/INA219 devices are digital and not pin-compatible - do not substitute them onto an INA223 footprint.
合规信息
Compliance status not stated in the retrieved web data; verify on the TI product page quality section before production release.
