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Texas Instruments INA203AIDGSR
- Part No.:
- INA203AIDGSR
- Manufacturer:
- Texas Instruments
- Category:
- Current Regulation/Management
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
INA203AIDGSR.pdf
- Description:
- IC CURRENT MONITOR 3.5% 10VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,093
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Product details
Overview
INA203AIDGSR 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, delivers 500-kHz bandwidth, and is specified for –40°C to 125°C. It enables precise shunt-based overcurrent detection in high-side power rails of telecom power supplies and battery chargers.
For engineers reviewing the INA203AIDGSR datasheet, INA203AIDGSR pinout, INA203AIDGSR application, or INA203AIDGSR equivalent, this page provides verified functional specifications, validated pin functions for the VSSOP-10 package, confirmed comparator timing behavior, and real-world design implications of its 0.6-V internal reference override capability and 1.2-V REF OUT stability.
Technical Context
The INA203AIDGSR integrates a precision current-sense amplifier, two independent comparators, and voltage references on a single die. Its current-sense path features 80 dB minimum CMRR at –16 V to 80 V common-mode, ±2.5 mV max offset voltage over temperature, and 500-kHz small-signal bandwidth - enabling accurate DC and transient current monitoring in noisy industrial power rails.
Comparator 1 implements a transparent/latched mode controlled by the active-low CMP1 RESET pin, while Comparator 2 accepts an external capacitor on CMP2 DELAY to set delay time (e.g., 0.1 μF = 0.5 s). Both comparators use internal 0.6-V references (pins 3 and 6) that are overridden only in 14-pin packages - not applicable to the VSSOP-10 INA203AIDGSR.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 20 V/V - scales 100-mV shunt drop to 2-V output; sets full-scale sense range at 0.15 V per datasheet. |
| Common-Mode Range | –16 V to 80 V - supports high-side sensing in negative-rail systems (e.g., –12 V bias) and 48-V telecom supplies. |
| Bandwidth | 500 kHz - captures fast current transients (e.g., MOSFET switching edges) without phase lag in protection circuits. |
| Quiescent Current | 1.8 mA - enables low-power operation in always-on battery backup or standby power monitors. |
| Reference Output | 1.2 V ±12 mV - stable, low-drift (40–100 ppm/°C) reference usable for comparator thresholds or ADC calibration. |
| Comparator Delay | User-programmable via external capacitor - allows adjustable response timing (e.g., 0.5 s delay) to suppress false trips from noise bursts. |
| Operating Temp | –40°C to 125°C - qualified for under-hood automotive modules and industrial motor drives with thermal cycling. |
Pinout & Package
VSSOP-10 package (3.00 mm × 3.00 mm), thermally enhanced, surface-mount, RoHS-compliant.
| 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 voltage. |
| VIN− | Current-sense low-side input | Connects to shunt resistor low side; forms differential input pair with VIN+ for bidirectional rejection. |
| CMP1 OUT | Open-drain latch output | Drives low when CMP1 triggers; requires external pull-up; remains latched until CMP1 RESET asserted. |
| CMP2 OUT | Open-drain delay output | Drives low after programmable delay; resets automatically; no latch - suitable for timed fault indication. |
| CMP1 RESET | Active-low reset control | Pulled internally to GND; must be driven high (>1.1 V) to clear latch; open-circuit = transparent mode. |
| VS | Positive supply input | Accepts 2.7 V–18 V; powers all internal blocks; bypass capacitor required at pin for stability. |
| OUT | Analog voltage output | Single-ended 20× amplified shunt voltage; rail-to-rail swing (to GND +4 mV, to VS –0.25 V). |
| CMP1 IN+ | Comparator 1 non-inverting input | Accepts external threshold signal; input range 0 V to VS –1.5 V; high-impedance (≤10 nA bias). |
| CMP2 IN+ | Comparator 2 non-inverting input | Same electrical specs as CMP1 IN+; used for second independent overcurrent or voltage threshold detection. |
| GND | Analog ground reference | Return path for sense inputs, comparators, and output stage; separate from power ground in layout-critical designs. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent comparators | CMP1 provides latched fault flag for persistent alarm; CMP2 offers user-timed delay to reject short spikes - eliminates need for external RC timers. |
| Integrated 1.2-V reference | Stable 1.2 V ±12 mV output with 40–100 ppm/°C drift - replaces external reference IC in dual-threshold protection schemes. |
| High common-mode tolerance | Operates from –16 V to 80 V common-mode - enables direct high-side sensing in 48-V telecom, 24-V industrial, and negative-bias systems. |
| Low quiescent current | 1.8 mA typical supply current - reduces self-heating error and extends battery life in portable power monitors. |
| Wide supply range | 2.7 V to 18 V operation - supports single-supply designs across 3.3-V microcontrollers, 5-V logic, and 12-V power rails. |
Applications
| Telecom Power Supply Monitoring | Battery Charger Overcurrent Protection |
|---|---|
Use Scenario: Real-time current monitoring of +48 V DC distribution bus feeding multiple line cards. IC Role / Device Role / Timing Role: High-side current shunt monitor with dual comparators detecting overcurrent and sustained overload conditions. Use Value: Enables immediate shutdown via CMP1 latch and delayed alert via CMP2 for thermal derating - avoids false trips from load surges. |
Use Scenario: Constant-current phase control in lithium-ion battery charging circuit with 12-V input. IC Role / Device Role / Timing Role: Shunt-based current feedback amplifier with CMP1 triggering charge termination and CMP2 initiating foldback mode. Use Value: 20 V/V gain ensures 100-mV shunt drop yields 2-V analog output compatible with 3.3-V ADCs; 1.2-V REF stabilizes comparator thresholds. |
| Automotive Body Control Module | Industrial Motor Drive Current Sensing |
Use Scenario: Load current supervision for 12-V/24-V solenoid drivers in vehicle door lock actuators. IC Role / Device Role / Timing Role: Unidirectional current monitor interfacing with MCU GPIOs via open-drain comparators for fault reporting. Use Value: –40°C to 125°C rating ensures reliability in engine bay environments; 80-V absolute max withstands load dump transients. |
Use Scenario: Phase current measurement in 3-phase inverter for HVAC blower motor with isolated gate drivers. IC Role / Device Role / Timing Role: High-bandwidth (500 kHz) analog output feeds isolation amplifier; CMP1 flags short-circuit events within 1.3 μs. Use Value: 500-kHz bandwidth captures IGBT switching artifacts; 80 dB CMRR rejects PWM noise coupling into shunt measurements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-sense monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA204AIDGSR | 50 V/V gain (vs. 20 V/V); same pinout, package, and feature set. | Requires lower shunt voltage (e.g., 40 mV full-scale) for same output swing - better for ultra-low-loss sensing. | Select when higher gain improves SNR in low-current (<5 A) applications; verify comparator thresholds remain valid. |
| INA205AIDGSR | 100 V/V gain; identical VSSOP-10 footprint and comparator architecture. | Supports 20-mV full-scale shunt drops - ideal for milliohm-level resistors where voltage loss must be <20 mV. | Choose for highest sensitivity in space-constrained PCBs; confirm 200-kHz bandwidth meets transient response needs. |
Compared with INA204AIDGSR and INA205AIDGSR, the INA203AIDGSR provides optimal trade-off between shunt voltage headroom (0.15 V full-scale) and noise immunity in mid-range current sensing (5–50 A), while retaining identical timing, latch, and delay functionality across the family.
Availability
INA203AIDGSR is available at Aetrix Electronics and suitable for telecom power supplies, battery charger protection circuits, and automotive body control modules requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for INA203AIDGSR 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 delivering analog and embedded processing solutions, with leadership in precision analog, power management, and signal chain technologies.
The INA203AIDGSR belongs to TI's current-shunt monitor product line, designed specifically for high-accuracy, high-common-mode current measurement in power conversion, protection, and energy metering systems.
FAQ
What is the maximum common-mode voltage the INA203AIDGSR can handle?
The INA203AIDGSR supports a common-mode input voltage range of –16 V to 80 V, verified per Absolute Maximum Ratings and Recommended Operating Conditions. This allows direct high-side sensing in 48-V telecom systems and negative-rail applications. The device maintains accuracy across this range with ≥80 dB CMRR, and the specification applies explicitly to the INA203AIDGSR VSSOP-10 variant as confirmed in the SBOS393E datasheet.
Does the INA203AIDGSR include an internal voltage reference?
Yes, the INA203AIDGSR provides a 1.2-V reference output (pin 10) with ±12 mV tolerance and 40–100 ppm/°C drift over –40°C to 85°C. This reference is active and usable for external comparator thresholds or ADC reference scaling. It is distinct from the 0.6-V internal comparator references, which are not accessible on the VSSOP-10 package - only present on 14-pin variants.
How does the CMP2 delay function work on the INA203AIDGSR?
The CMP2 delay on the INA203AIDGSR is implemented using an external capacitor connected to the CMP2 DELAY pin (pin 9). The delay time tD (in seconds) equals 5 × CDELAY (in µF); for example, a 0.1-µF capacitor yields 0.5 s. This delay applies to both rising and falling edges of CMP2 OUT and is confirmed in Electrical Characteristics Table 7.6 and Feature Description Section 8.3.4 of the official datasheet.
Is the INA203AIDGSR pin-compatible with other devices in the INA20x family?
The INA203AIDGSR in VSSOP-10 is pin-compatible with INA204AIDGSR and INA205AIDGSR in the same package - all share identical pin count, assignment, and mechanical footprint. Gain differences (20/50/100 V/V) do not affect pinout or interface behavior. However, it is not pin-compatible with 14-pin SOIC or TSSOP variants due to differing pin count and added functions (e.g., 1.2-V REF OUT appears only on 14-pin versions).
What is the quiescent current of the INA203AIDGSR over temperature?
The INA203AIDGSR draws 1.8 mA typical quiescent current at 25°C, rising to 2.2 mA maximum at 125°C and 2.8 mA when VSENSE = 0 mV. These values are measured under recommended operating conditions (VS = 12 V, VCM = 12 V) and are specified in Section 7.8 of the SBOS393E datasheet - confirming low power consumption for always-on monitoring applications.
INA203AIDGSR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-VSSOP
INA203AIDGSR FAQ
1.How can I place an order for INA203AIDGSR through Aetrix?
Please submit a Request for Quotation (RFQ) for INA203AIDGSR 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 INA203AIDGSR reliable?
The price and inventory of INA203AIDGSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA203AIDGSR is usually 5 days.
3.What payment methods are accepted for INA203AIDGSR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA203AIDGSR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA203AIDGSR?
INA203AIDGSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA203AIDGSR 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 INA203AIDGSR?
For technical support, including INA203AIDGSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA203AIDGSR requirements.
6.How does Aetrix verify that INA203AIDGSR is sourced from the original manufacturer or authorized distributors?
All INA203AIDGSR 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 INA203AIDGSR meets industry standards.
7.What is the process for return or replacement of INA203AIDGSR?
All INA203AIDGSR units undergo pre-shipment inspection (PSI). If there is an issue with INA203AIDGSR, 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 INA203AIDGSR part is unused and in its original packaging.
Return procedure for INA203AIDGSR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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