INA223AIDSKT - 26V Current Sense Amplifier & Power Monitor | TI
MPN： INA223AIDSKT ✓ 啟用中INA223AIDSKT 概覽
A current sense amplifier (also called a current shunt monitor) is a specialized precision amplifier that converts the small differential voltage developed across a shunt resistor into a ground-referenced, scalable output signal. Within the power management hierarchy, it sits in the current and power monitoring layer between raw voltage regulators and system controllers, enabling battery management, fault protection, and energy telemetry without a dedicated ADC front end.
Key features include a wide common-mode input range of up to 26V that is independent of the supply voltage, a programmable gain architecture that lets designers trade shunt value against full-scale range, and bidirectional sensing that supports both charge and discharge current measurement. The analog voltage output and power-monitor function can be read by a simple ADC channel or comparator, minimizing system cost and software complexity.
Technically, the INA223 uses a zero-drift architecture that suppresses offset and offset drift over time and temperature, which is essential for accurate low-side and high-side sensing across the automotive and industrial temperature span. The high/low-side capability means the same design can be reused above or below the shunt, simplifying platform designs across 3.3V, 5V, 12V, and 24V rails within the 26V limit.
Typical applications include battery-powered systems current and power telemetry, server and telecom -48V/negative-rail-adjacent monitoring within ratings, motor drive DC bus supervision, and power-supply health monitoring in industrial equipment. The analog output interfaces directly to microcontroller ADC inputs such as TI MSP430 or C2000 devices.
Design consideration: choose the shunt resistor so maximum expected current produces an output swing comfortably inside the ADC range; excessive shunt value wastes power and degrades accuracy through self-heating.
This page synthesizes distributor pricing, drop-in same-family gain alternatives, and practical design guidance not consolidated in the manufacturer datasheet.
直接替換替代品，適用於 INA223AIDSKT — 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： INA223AIDSKT （相同外形與佔位） — 差異在於 Architecture, Output Type, Package, Product Type.
INA223AIDSKR
✅ 直接替換聯絡詢價
查看資料表 →INA223A1IDSKR
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
INA223A2IDSKR
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
INA223A3IDSKR
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
INA223A4IDSKR
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
INA223AIDSKT 最大額定值與電氣特性
| Product Type | Current Sense Amplifier / Analog Power Monitor |
| Common-Mode Voltage Range | 0 V to 26 V |
| Gain Configuration | Programmable-gain |
| Measurement Type | High-Side / Low-Side, Bidirectional |
| Architecture | Zero-Drift |
| 輸出類型 | Analog voltage output |
| 工作溫度 | -40C to +105C |
| 封裝 | 10-SON / WSON (DSK) 2.5 mm x 2.5 mm |
| 安裝類型 | Surface Mount |
| 腳位數 | 10 |
| RoHS 狀態 | Compliant |
INA223AIDSKT 10-son / wson (dsk) 2.5 mm x 2.5 mm 腳位配置指南
INA223AIDSKT（10-son / wson (dsk) 2.5 mm x 2.5 mm 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： INA223AIDSKT.
請參閱 資料表 以查看完整腳位配置。
典型應用
INA223AIDSKT 適用於 6 應用s: Battery Current & Power Monitoring, 24V Industrial Rail Supervision, Server & Telecom Power Telemetry, Motor Drive DC Bus Monitoring, Power Supply Health & Efficiency Monitoring, IoT & Smart Device Energy Metering.
Battery Current & Power Monitoring
The INA223AIDSKT fits battery-powered systems because its bidirectional high/low-side sensing tracks both charge and discharge current across a 0V to 26V common-mode range that covers most single-cell stacks and 24V lead-acid or multi-cell lithium packs. Placed across a low-side shunt with the reference pin biased at mid-scale, the analog output swings above and below reference for current direction, feeding a single MCU ADC channel. The zero-drift architecture keeps offset error negligible across the wide shunt signal range typical of batteries, and the integrated analog power monitor provides instantaneous power for state-of-charge and state-of-health algorithms without extra computation.
推薦
24V Industrial Rail Supervision
Industrial 24V buses sit comfortably inside the 26V common-mode rating, so the INA223AIDSKT monitors motor drives, PLC I/O channels, and factory automation loads while being powered itself from a 3.3V or 5V logic supply - the common-mode range is independent of supply. The amplifier is placed high-side with a milliohm-class shunt; the analog power-monitor output scales with current, giving controllers a single-signal health indicator for overload and brownout detection. The zero-drift topology maintains accuracy across the -40C to +105C industrial temperature range, and the small 2.5 mm x 2.5 mm WSON footprint fits crowded I/O boards.
推薦
Server & Telecom Power Telemetry
Data center and telecom equipment require continuous power telemetry on dense power distribution boards. The INA223AIDSKT suits this role because the analog output and power monitor can be multiplexed into existing ADC channels without adding an I2C bus segment, and the 26V common-mode range covers 12V server rails, 24V intermediate buses, and -48V-adjacent monitoring topologies within ratings. The zero-drift input stage preserves low-percentage accuracy at light loads where server sleep-state currents are small relative to full load. Its tiny WSON-10 package enables one monitor per rail on high-density PDUs, and the programmable-gain family lets one shunt serve multiple current ranges across product variants.
推薦
Motor Drive DC Bus Monitoring
In motor drives, the DC bus current and instantaneous power indicate mechanical load and fault conditions. The INA223AIDSKT monitors the bus via a high-side shunt with 0V to 26V common mode - suitable for 12V and 24V drive platforms - while its analog power output gives a load-proportional signal for closed-loop torque estimation and stall detection. Zero-drift accuracy prevents offset-induced false trips at idle, and the bidirectional capability captures regenerative braking current flowing back into the bus. Response on the analog output is fast enough for comparator-based overcurrent latching when paired with a fast reference, complementing slower telemetry ADC sampling.
推薦
Power Supply Health & Efficiency Monitoring
AC-DC and DC-DC power supplies increasingly include real-time efficiency telemetry. The INA223AIDSKT measures input or output current with a compact shunt; because current and power are output as scaled analog voltages, a single ADC capture yields instantaneous power for computing efficiency against an input voltage measurement. The 26V common-mode ceiling covers 12V, 19V, and 24V rails, and the zero-drift architecture keeps light-load readings meaningful, which is where efficiency curves degrade first. The tiny 10-SON package fits inside enclosed adapters and open-frame supplies without significant layout penalty, enabling adaptive power management in the host system.
推薦
IoT & Smart Device Energy Metering
Battery and mains-powered IoT nodes benefit from knowing their own consumption profile. The INA223AIDSKT's low component count - one shunt, one IC, a reference voltage - and the 2.5 mm x 2.5 mm WSON-10 footprint make per-device energy metering practical in space-constrained smart home products. The analog output connects directly to low-cost MCU ADC pins, and the power monitor output can trigger wake-up when load power exceeds a threshold, supporting energy harvesting and duty-cycling strategies. Its -40C to +105C rating allows outdoor sensor installations, and the 26V common-mode range accommodates solar-charged 12V and 24V battery nodes.
推薦
推薦產品摘要
工程參考資料，適用於 INA223AIDSKT — 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 | INA223AIDSKR | INA223A1IDSKR | INA223A2IDSKR |
|---|---|---|---|---|
| Package | 10-SON / WSON (DSK) 2.5x2.5 | 10-SON / WSON (DSK) 2.5x2.5 - same | 10-SON / WSON (DSK) 2.5x2.5 - same | 10-SON / WSON (DSK) 2.5x2.5 - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Common-Mode Voltage | 0 V to 26 V | 0 V to 26 V | 0 V to 26 V | 0 V to 26 V |
| Gain Configuration | Programmable-gain | Programmable-gain | Fixed gain (A1) | Fixed gain (A2) |
| Measurement Type | High/Low-side, bidirectional | High/Low-side, bidirectional | High/Low-side, bidirectional | High/Low-side, bidirectional |
| Architecture | Zero-drift | Zero-drift | Zero-drift | Zero-drift |
| Output | Analog voltage + power monitor | Analog voltage + power monitor | Analog voltage + power monitor | Analog voltage + power monitor |
主要差異化特點
- Analog power monitor output on top of current output (對比INA210 series shunt monitors)
- Programmable-gain flexibility within one footprint (對比INA223A1IDSKR (fixed-gain A1 variant))
- 26V common-mode independent of supply (對比Generic low-side current sense amps)
設計說明
Use Kelvin (4-wire) connections from the shunt resistor to the INA223AIDSKT sense inputs: route dedicated traces from the shunt pads directly to the amplifier inputs rather than tapping the main current path. Parasitic resistance in shared traces adds gain error, and parasitic inductance in long sense lines causes ringing during load transients. Keep sense traces short and matched. Place 100 nF decoupling close to the supply pin and the 10-SON exposed pad must be soldered to a grounded copper pour for thermal and electrical performance per the TI datasheet layout section.
Select the shunt for 50-100 mV full-scale drop at maximum load current. Estimated: a 10 mOhm shunt at 5 A dissipates I2R = 0.25 W, requiring at least a 1206 or shunt-rated resistor to limit self-heating drift; a 5 mOhm shunt halves dissipation but doubles offset-referred error, which the zero-drift architecture mitigates. With the programmable-gain INA223, prefer a smaller shunt with higher gain over a large shunt with low gain, unless small-signal resolution is the binding constraint.
Do not exceed 26V common-mode on the sense inputs even transiently - inductive spikes on motor or battery cables during switching can exceed the absolute maximum and damage the part; add a small RC filter or TVS on the sense lines in high-di/dt environments. Also verify that the reference pin bias voltage keeps the analog output within the ADC input range for both current polarities, and confirm the Q1 (automotive) suffix separately if AEC-Q100 compliance is required for your build.
合規資訊
RoHS compliance standard for current TI production; AEC-Q100 status applies to separate INA223 Q1 ordering variants - verify on TI quality portal for this exact suffix.
