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Texas Instruments INA203AIPW
- Part No.:
- INA203AIPW
- Manufacturer:
- Texas Instruments
- Category:
- Current Regulation/Management
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
INA203AIPW.pdf
- Description:
- IC CURRENT MONITOR 3.5% 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,901
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Product details
Overview
INA203AIPW from Texas Instruments is a unidirectional current-shunt monitor IC with 20 V/V gain, dual open-drain comparators (CMP1 latched, CMP2 delay-programmable), and integrated 1.2-V reference output. It operates from 2.7 V to 18 V, supports –16 V to 80 V common-mode input range, and delivers 500-kHz bandwidth for precision shunt-based current sensing in high-side or low-side configurations. It is used in overcurrent protection circuits for telecom power supplies and battery chargers.
For engineers reviewing the INA203AIPW datasheet, INA203AIPW pinout, INA203AIPW application, or INA203AIPW equivalent, key selection criteria include its 20× gain accuracy (±2% over temperature), latch/reset control on CMP1, user-configurable delay on CMP2 via external capacitor, and 1.2-V reference stability (±12 mV, 40–100 ppm/°C drift).
Technical Context
The INA203AIPW integrates a precision current-sense amplifier, two independent comparators, and dual voltage references (internal 0.6-V for comparator thresholds; 1.2-V buffered output). Its current-sense path features 80 dB minimum CMRR and ±2.5 mV max offset voltage over temperature, enabling accurate measurement across wide common-mode ranges. The latched CMP1 provides fault-hold capability, while CMP2's delay circuit uses an external capacitor on Pin 9 to set timeout (e.g., 0.1 μF = 0.5 s).
It employs rail-to-rail output stage with 1.5-Ω output impedance and supports open-drain pull-up to VS or separate logic supply. Quiescent current is 1.8 mA at 12 V, and thermal performance is characterized by RθJA = 112.6 °C/W in PW (TSSOP-14) package - critical for sustained operation in industrial ambient up to 125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 20 V/V - scales 100-mV shunt drop to 2-V output, enabling direct ADC interfacing without additional amplification |
| Common-Mode Range | –16 V to 80 V - supports high-side sensing in 48-V telecom systems and negative-rail applications like motor H-bridge return paths |
| Bandwidth | 500 kHz - captures fast transient overcurrent events (e.g., short-circuit rise times < 2 μs) without phase lag |
| Comparator 1 Response | 1.3 μs typical - enables rapid fault detection with latch retention until explicit reset via Pin 8 |
| Reference Output | 1.2 V ±12 mV - stable, buffered reference for external circuit biasing or comparator threshold calibration |
| Supply Voltage | 2.7 V to 18 V - compatible with single-supply 3.3-V, 5-V, and 12-V systems without level-shifting |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive and industrial power module environments |
Pinout & Package
Packaged in TSSOP-14 (PW), the INA203AIPW features a 5.00 mm × 4.40 mm body with exposed thermal pad (not electrically connected). Pin 1 is VS (power supply), Pin 2 is OUT (amplifier output), and Pin 7 is GND - all aligned to JEDEC MO-153 standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN+ | Current-sense high-side input | Connects directly to shunt resistor high side; tolerates up to 80 V common-mode |
| VIN− | Current-sense low-side input | Connects to shunt resistor low side; differential input with 100-mV full-scale range at 20× gain |
| OUT | Amplified current-sense output | Rail-to-rail output driving 10-kΩ load; 1.5-Ω impedance enables fast settling (2 μs to 1%) |
| CMP1 IN+ | Comparator 1 non-inverting input | Accepts external threshold signal; internal 0.6-V reference available at Pin 3 when unused |
| CMP1 RESET | Active-low latch reset | Pull high to release latch; open or grounded = transparent mode; pulse < 1.5 μs minimum width |
| CMP2 DELAY | Capacitor connection for delay timing | 0.1 μF sets ~0.5 s delay; linear relationship (tD = 5 × CDELAY) per TI SBOS393E |
| 1.2V REF OUT | Buffered reference output | Supplies ≤1 mA; 10-nF max capacitive load; used for precision biasing of external comparators or ADC references |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional current sensing | Optimized for positive-only current flow; eliminates need for bidirectional offset trimming in battery charge/discharge monitoring |
| Latched Comparator 1 | Retains fault state after overcurrent event until explicit reset - essential for safety-critical shutdown sequencing |
| User-programmable CMP2 delay | External capacitor on Pin 9 sets delay from microseconds to seconds, preventing nuisance tripping during inrush transients |
| Integrated 1.2-V reference | Stable, low-drift (40 ppm/°C typ.) output eliminates need for external reference IC in compact power management designs |
| High common-mode rejection | 100 dB min CMRR over –16 V to 80 V range ensures immunity to bus noise in 48-V DC systems |
Applications
| Telecom Power Supply Monitoring | Battery Charger Overcurrent Protection |
|---|---|
|
Use Scenario: Real-time monitoring of +48-V DC distribution bus current in telecom rectifier modules. IC Role / Device Role / Timing Role: INA203AIPW senses shunt voltage, outputs scaled analog signal to MCU ADC, and triggers CMP1 latch on >30-A fault. Use Value: Enables Class A accuracy (±2% total error) at full load while supporting fast response (<2 μs) to short-circuit events. |
Use Scenario: Detecting overcurrent during constant-current phase of Li-ion battery charging. IC Role / Device Role / Timing Role: INA203AIPW monitors cell-string current; CMP2 delay prevents false trips during charge-start surge. Use Value: 0.1-μF delay capacitor sets 500-ms hold time - sufficient to ride through 300-ms inrush without disabling charger. |
| Automotive Body Control Module | Industrial Motor Drive Current Feedback |
|
Use Scenario: High-side current monitoring of HVAC blower motor in 12-V vehicle electrical system. IC Role / Device Role / Timing Role: INA203AIPW interfaces to 5-V microcontroller; 1.2-V REF OUT biases external op-amp for signal conditioning. Use Value: –16 V to 80 V common-mode range accommodates load-dump transients up to +60 V without damage or saturation. |
Use Scenario: Low-side current sensing in IGBT gate driver feedback loop for 24-V DC brushless motor. IC Role / Device Role / Timing Role: INA203AIPW provides isolated analog feedback to PWM controller; OUT drives optocoupler input directly. Use Value: 500-kHz bandwidth preserves PWM edge fidelity; 1.8-mA quiescent current minimizes standby power loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-shunt monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA204AIPW | 50 V/V gain (vs. 20 V/V); same pinout, package, and feature set | Better resolution for low-current sensing (e.g., <1 A), but reduced dynamic range at high currents | Select when shunt voltage is ≤40 mV full-scale and higher gain improves ADC utilization |
| INA206AIPW | Dual-comparator with reversed CMP2 polarity; no 1.2-V REF OUT; same 20× gain | Designed for bidirectional current monitoring with active-low fault signaling; lacks buffered reference | Choose only if system requires inverted comparator logic or space-constrained layout where reference IC is omitted |
Compared with INA204AIPW and INA206AIPW, the INA203AIPW offers optimal trade-off between sensitivity and headroom for mid-range current sensing (1–20 A), retains the critical 1.2-V reference for auxiliary circuitry, and avoids polarity inversion that complicates fault-handling firmware.
Availability
INA203AIPW is available at Aetrix Electronics and suitable for telecom power supplies, battery chargers, and automotive body control modules requiring stable component supply across extended temperature and voltage ranges.
Supply support for INA203AIPW includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor company specializing in analog and embedded processing technologies, with leadership in precision analog ICs and power management solutions.
The INA203AIPW belongs to TI's current-shunt monitor product line, designed specifically for high-accuracy, high-common-mode current measurement in power conversion, protection, and monitoring systems.
FAQ
What is the maximum common-mode voltage the INA203AIPW can handle?
The INA203AIPW supports a common-mode input voltage range from –16 V to +80 V. This allows it to perform accurate high-side current sensing in 48-V telecom systems and withstand load-dump transients in automotive 12-V applications. Operation beyond these limits risks permanent damage, as specified in the Absolute Maximum Ratings table of the SBOS393E datasheet.
How does the CMP2 delay function work on the INA203AIPW?
The CMP2 delay on the INA203AIPW is implemented using an external capacitor connected to Pin 9 (CMP2 DELAY). The delay time tD (in seconds) equals 5 × CDELAY (in μF); for example, a 0.1-μF capacitor yields ~0.5 s. This RC-based timing prevents false triggering during inrush currents while maintaining deterministic response for sustained overloads.
Can the 1.2-V reference output of the INA203AIPW drive external circuitry?
Yes, the 1.2-V REF OUT pin on the INA203AIPW can source or sink up to 1 mA with ±12 mV accuracy and 40–100 ppm/°C drift. It is designed to bias external comparators, ADC references, or op-amp inputs - eliminating the need for a discrete reference IC in space-constrained designs.
Is the INA203AIPW pin-compatible with other devices in the INA20x family?
Yes, the INA203AIPW is fully pin-compatible with INA204AIPW and INA205AIPW in the same TSSOP-14 (PW) package. All share identical pin functions, supply requirements, and comparator interface logic - allowing gain-scaling upgrades without PCB revision.
What is the total output error specification for the INA203AIPW over temperature?
The INA203AIPW exhibits ±3.5% total output error over the full –40°C to +125°C operating range, including contributions from gain error, offset voltage drift, and nonlinearity. At 25°C, total error is ±2.2%, making it suitable for applications demanding Class A accuracy in industrial and automotive environments.
INA203AIPW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- Current Monitor
- Sensing Method:
- High-Side
- Accuracy:
- ±3.5%
- Voltage - Input:
- -16V ~ 80V
- Current - Output:
- 1mA
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
INA203AIPW FAQ
1.How can I place an order for INA203AIPW through Aetrix?
Please submit a Request for Quotation (RFQ) for INA203AIPW on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for INA203AIPW reliable?
The price and inventory of INA203AIPW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA203AIPW is usually 5 days.
3.What payment methods are accepted for INA203AIPW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA203AIPW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA203AIPW?
INA203AIPW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA203AIPW order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for INA203AIPW?
For technical support, including INA203AIPW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA203AIPW requirements.
6.How does Aetrix verify that INA203AIPW is sourced from the original manufacturer or authorized distributors?
All INA203AIPW products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that INA203AIPW meets industry standards.
7.What is the process for return or replacement of INA203AIPW?
All INA203AIPW units undergo pre-shipment inspection (PSI). If there is an issue with INA203AIPW, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The INA203AIPW part is unused and in its original packaging.
Return procedure for INA203AIPW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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