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Texas Instruments INA203AQPWRQ1
- Part No.:
- INA203AQPWRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Current Regulation/Management
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
INA203AQPWRQ1.pdf
- Description:
- IC CURRENT MONITOR 3.5% 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,725
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Product details
Overview
INA203AQPWRQ1 from Texas Instruments is an automotive-grade unidirectional voltage-output current shunt monitor with dual open-drain comparators and integrated 1.2 V/0.6 V references, operating over –16 V to +80 V common-mode range, 20 V/V gain, 500 kHz bandwidth, and ±3.5% total output error over temperature - used for real-time overcurrent detection in high-voltage motor control and safety-critical vehicle subsystems.
For engineers reviewing the INA203AQPWRQ1 datasheet, INA203AQPWRQ1 pinout, INA203AQPWRQ1 application, or INA203AQPWRQ1 equivalent, this page delivers verified functional architecture, validated TSSOP-14 pin mapping, confirmed comparator latching and programmable delay behavior, and precise automotive-grade electrical specifications per AEC-Q100 Grade 1.
Technical Context
The INA203AQPWRQ1 implements a precision current-sense amplifier core with rail-to-rail output swing capability (VS – 0.25 V), CMRR ≥100 dB across –16 V to +80 V common-mode range, and 5 μV/°C offset drift. Its dual comparators feature internal 0.6 V references, independent input ranges (0 V to VS – 1.5 V), and distinct response behaviors: Comparator 1 includes transparent/latched operation controlled by active-low CMP1 RESET, while Comparator 2 supports user-defined delay via external capacitor on CMP2 DELAY pin.
It integrates a 1.2 V reference output with ≤100 ppm/°C drift and load regulation of 0.4 mV/mA, and operates from a single 2.7 V to 18 V supply at –40°C to +125°C. Quiescent current is 1.8 mA (typ), and latch-up performance meets 100 mA per AEC-Q100 Level I.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 20 V/V - provides 5 V output for 250 mV shunt drop, enabling direct interface with 5 V ADCs or logic thresholds. |
| Bandwidth | 500 kHz - supports fast transient current monitoring in EPS and ESC systems without signal distortion. |
| Common-mode Range | –16 V to +80 V - enables high-side and low-side sensing in 48 V architectures and battery disconnect monitoring. |
| Total Output Error | ±3.5% over –40°C to +125°C - ensures reliable fault detection across full automotive temperature range. |
| Comparator 1 Response | 1.3 μs typical propagation delay with latch/reset - delivers deterministic overcurrent trip and hold until manual reset. |
| Comparator 2 Delay | User-programmable via capacitor (tD = 5 × CDELAY in μF) - allows adjustable blanking for noise immunity in PWM-driven loads. |
| Reference Outputs | 1.2 V REF OUT (±12 mV accuracy) and dual 0.6 V internal refs - eliminates need for external references in comparator threshold setting. |
| Supply Range | 2.7 V to 18 V - compatible with 5 V, 12 V, and 15 V automotive rails without LDO pre-regulation. |
Pinout & Package
TSSOP-14 package (5.00 mm × 4.40 mm), thermally enhanced for automotive under-hood environments; RoHS-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VS) | Power supply input | Accepts 2.7–18 V; powers all internal blocks including comparators and reference; requires local 0.01 μF bypass. |
| 2 (OUT) | Current sense amplifier output | Voltage output proportional to shunt voltage (VOUT = 20 × VSENSE); drives 10 kΩ load to GND with rail-to-rail swing. |
| 3 (CMP1 IN−/0.6 V REF) | Comparator 1 negative input / reference override | Internal 0.6 V ref node; externally overridable to set custom trip point; max input 0 V to VS − 1.5 V. |
| 4 (CMP1 IN+) | Comparator 1 positive input | Accepts sensed signal (e.g., amplified shunt output); latched output holds state until CMP1 RESET asserted. |
| 5 (CMP2 IN+) | Comparator 2 positive input | Primary trip input; supports same voltage range as CMP1 IN+; enables independent second-level fault detection. |
| 6 (CMP2 IN−/0.6 V REF) | Comparator 2 negative input / reference override | Second 0.6 V ref node; independently overridable; allows differential or referenced threshold configuration. |
| 7 (GND) | Analog ground | System return for amplifier, comparators, and reference; must be connected to low-impedance ground plane. |
| 8 (CMP1 RESET) | Active-low latch reset | Pulled down internally (2 MΩ); drives LOW to clear latched CMP1 OUT; minimum pulse width 1.5 μs. |
| 9 (CMP2 DELAY) | Comparator 2 delay timing node | Connects external capacitor (0.1 μF → 0.5 s delay); controls both rising/falling edge delay per datasheet Eq. 1. |
| 10 (CMP2 OUT) | Comparator 2 open-drain output | Active-low, requires external pull-up; delays both edges; VOL ≤300 mV at 2.35 mA sink current. |
| 11 (CMP1 OUT) | Comparator 1 open-drain output | Active-low, latched; requires external pull-up; identical VOL spec; resets only via CMP1 RESET pin. |
| 12 (1.2 V REF OUT) | Stable reference output | 1.2 V ±12 mV; supplies external circuitry or comparator bias; max load 1 mA; stable with ≤10 nF capacitive load. |
| 13 (VIN−) | Amplifier negative input | Connects to shunt low side; common-mode tolerant to –16 V; input bias current ±16 μA max over temp. |
| 14 (VIN+) | Amplifier positive input | Connects to shunt high side; supports up to +80 V common-mode; enables bidirectional system monitoring. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 1 (–40°C to +125°C), qualified for EPS, ESC, and brake systems per ISO 26262 readiness. |
| Dual comparator architecture | Comparator 1 with latch/reset and Comparator 2 with user-programmable delay - enables tiered fault response (e.g., warning + shutdown). |
| Integrated reference system | 1.2 V REF OUT + dual 0.6 V internal refs - eliminates external reference ICs and reduces BOM count and layout area. |
| High common-mode tolerance | –16 V to +80 V input range - supports 48 V mild-hybrid, 12 V legacy, and battery-disconnect monitoring in single design. |
| Fast, accurate sensing | 500 kHz bandwidth + ±3.5% total error over temp - captures sub-millisecond overcurrent events with minimal latency. |
| Robust power handling | 100 mA latch-up immunity and ±2000 V HBM ESD rating - ensures reliability in noisy automotive environments. |
Applications
| Electric Power Steering (EPS) | Brake Systems |
|---|---|
Use Scenario: Real-time motor phase current monitoring during assist torque delivery and fault recovery. IC Role / Device Role / Timing Role: Current shunt monitor amplifies mV-level shunt voltage; Comparator 1 latches overcurrent to disable gate driver; Comparator 2 triggers soft shutdown after programmable delay. Use Value: Prevents MOSFET destruction during stall conditions while allowing brief peak currents during steering transients. |
Use Scenario: Monitoring solenoid coil current in electro-hydraulic brake (EHB) actuators. IC Role / Device Role / Timing Role: Amplifies shunt voltage across brake coil; 1.2 V REF OUT biases external op-amp for differential sensing; CMP2 delay filters PWM switching noise. Use Value: Enables accurate coil health diagnostics and prevents false activation due to commutation spikes. |
| Body Control Modules (BCM) | Electronic Stability Control (ESC) |
Use Scenario: Overcurrent protection for high-current lighting (headlamps, fog lamps) and HVAC blower motors. IC Role / Device Role / Timing Role: High-side sensing via VIN+/VIN−; Comparator 1 triggers immediate fuseless shutdown; 0.6 V refs set consistent 10 A trip threshold across variants. Use Value: Replaces mechanical fuses with programmable, self-diagnosing protection that logs fault events. |
Use Scenario: Wheel motor current monitoring in integrated brake-by-wire modules. IC Role / Device Role / Timing Role: Unidirectional sensing at +48 V bus; OUT drives 12-bit SAR ADC; CMP1 OUT signals critical overcurrent to MCU interrupt pin. Use Value: Meets ASIL-B diagnostic coverage requirements with <1 μs response time and latch persistence during MCU reset. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-shunt monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA200AQPWRQ1 | Single comparator only; no CMP2 delay or 1.2 V REF OUT; identical amplifier specs and TSSOP-14 package. | Lacks tiered fault response; suitable only where one overcurrent threshold suffices (e.g., simple fan control). | Select when cost reduction is prioritized over dual-threshold flexibility and reference integration. |
| INA282AQDGKRQ1 | Higher accuracy (±0.5% max gain error), no integrated comparators or references; 8-pin VSSOP package. | Requires external comparators and references; better for precision measurement than fault protection. | Choose when measurement fidelity dominates over integrated protection - e.g., battery cell balancing feedback. |
Compared with INA200AQPWRQ1 and INA282AQDGKRQ1, the INA203AQPWRQ1 uniquely combines automotive-grade current sensing, dual programmable comparators, and dual reference outputs in one TSSOP-14 package - making it optimal for space-constrained, safety-critical overcurrent protection where integrated functionality reduces system-level complexity and validation effort.
Availability
INA203AQPWRQ1 is available at Aetrix Electronics and suitable for Electric Power Steering (EPS), Brake Systems, and Electronic Stability Control (ESC) requiring stable component supply across extended automotive temperature and lifecycle requirements.
Supply support for INA203AQPWRQ1 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 leader focused on analog and embedded processing technologies, with deep expertise in automotive electronics and functional safety design.
The INA203-Q1 product line delivers AEC-Q100 qualified current-sense solutions for safety-critical vehicle subsystems - engineered specifically for real-time overcurrent detection, fault latching, and noise-immune decision-making in EPS, ESC, and braking modules.
FAQ
What is the maximum common-mode voltage supported by the INA203AQPWRQ1?
The INA203AQPWRQ1 supports a common-mode input voltage range of –16 V to +80 V, enabling high-side and low-side current sensing in 12 V, 48 V, and battery-disconnect applications. This specification is guaranteed over the full –40°C to +125°C operating temperature range and is validated per the SBOS539A datasheet absolute maximum and recommended operating conditions tables.
How does the CMP2 DELAY pin function on the INA203AQPWRQ1?
The CMP2 DELAY pin on the INA203AQPWRQ1 accepts an external capacitor to program comparator 2's response delay using tD = 5 × CDELAY (with CDELAY in μF). For example, a 0.1 μF capacitor yields ~0.5 s delay on both rising and falling edges. This feature suppresses false trips from PWM noise or transient spikes without requiring external timers or microcontroller intervention - a key capability confirmed in Section 8.3.2 of the INA203AQPWRQ1 datasheet.
Does the INA203AQPWRQ1 include an internal voltage reference?
Yes, the INA203AQPWRQ1 integrates two internal voltage references: a 0.6 V reference accessible at pins 3 and 6, and a 1.2 V reference output at pin 12. The 1.2 V REF OUT is specified at 1.188 V to 1.212 V (±1%, 25°C), with drift ≤100 ppm/°C and load regulation ≤0.4 mV/mA - eliminating need for external references in comparator thresholding or biasing circuits, as documented in Section 7.7 of the INA203AQPWRQ1 datasheet.
What is the gain and bandwidth of the current-sense amplifier in the INA203AQPWRQ1?
The INA203AQPWRQ1 features a fixed gain of 20 V/V and a small-signal bandwidth of 500 kHz (CLOAD = 5 pF), enabling accurate amplification of shunt voltages up to 250 mV full-scale while preserving fast current transients. Bandwidth is maintained with phase margin ≥40°, and slew rate is 1 V/μs - parameters verified in Section 7.5 (Electrical Characteristics: Current-Shunt Monitor) and Figure 2 of the INA203AQPWRQ1 datasheet.
Is the INA203AQPWRQ1 pin-compatible with other devices in the INA20x-Q1 family?
No, the INA203AQPWRQ1 is not pin-compatible with other INA20x-Q1 variants such as the INA200AQPWRQ1 (TSSOP-14 but different pin functions) or INA201AQPWRQ1 (TSSOP-8). Pin mapping is unique to the INA203AQPWRQ1: for example, CMP2 DELAY is on pin 9, while INA200AQPWRQ1 uses pin 9 for GND. Always verify pin functions against the "Pin Configuration and Functions" section (page 3) of the INA203AQPWRQ1 datasheet before board reuse.
INA203AQPWRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Current Monitor
- Sensing Method:
- High-Side
- Accuracy:
- ±3.5%
- Voltage - Input:
- -16V ~ 80V
- Current - Output:
- 1mA
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
INA203AQPWRQ1 FAQ
1.How can I place an order for INA203AQPWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA203AQPWRQ1 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 INA203AQPWRQ1 reliable?
The price and inventory of INA203AQPWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA203AQPWRQ1 is usually 5 days.
3.What payment methods are accepted for INA203AQPWRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA203AQPWRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA203AQPWRQ1?
INA203AQPWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA203AQPWRQ1 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 INA203AQPWRQ1?
For technical support, including INA203AQPWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA203AQPWRQ1 requirements.
6.How does Aetrix verify that INA203AQPWRQ1 is sourced from the original manufacturer or authorized distributors?
All INA203AQPWRQ1 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 INA203AQPWRQ1 meets industry standards.
7.What is the process for return or replacement of INA203AQPWRQ1?
All INA203AQPWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA203AQPWRQ1, 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 INA203AQPWRQ1 part is unused and in its original packaging.
Return procedure for INA203AQPWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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