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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Current Regulation/Management

Texas Instruments INA204AID

Name: INA204AID
Brand: Texas Instruments
SKU: INA204AID
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: INA204AID

Manufacturer:: Texas Instruments

Category:: Current Regulation/Management

Package:: 14-SOIC (0.154", 3.90mm Width)

Datasheet:: INA204AID.pdf

Description:: IC CURRENT MONITOR 3.5% 14SOIC

Quantity:: RFQ Add To RFQ list

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Product details

Overview

INA204AID from Texas Instruments is a unidirectional current-shunt monitor IC with dual open-drain comparators, 50 V/V gain, 1.2-V reference output, and –16 V to 80 V common-mode input range. It delivers 2.2 mA quiescent current, 500-kHz bandwidth (at G = 20), 300-kHz bandwidth (at G = 50), ±2.5 mV offset voltage, and operates from 2.7 V to 18 V supply in notebook power rails and telecom DC/DC monitoring.

For engineers reviewing the INA204AID datasheet, INA204AID pinout, INA204AID application, or INA204AID equivalent, this page provides verified functional specifications, validated SOIC-14 pin mapping, confirmed comparator latching and programmable delay behavior, and real-world use cases in overcurrent protection and battery charge management systems.

Technical Context

The INA204AID integrates a precision current-sense amplifier with fixed 50 V/V gain, two independent comparators-one with latch/reset control via CMP1 RESET pin, the other with user-programmable delay via external capacitor on CMP2 DELAY pin-and dual internal references (0.6 V for comparator inputs, 1.2 V output on Pin 12). Its architecture supports high-side shunt sensing across wide common-mode voltages without level-shifting circuitry.

It uses an open-drain output stage for OUT (Pin 2), CMP1 OUT (Pin 11), and CMP2 OUT (Pin 10), requiring external pull-up resistors. The 14-pin SOIC package enables full feature access-including 1.2-V REF OUT, CMP1 IN–/0.6V REF (Pin 3), and CMP2 IN–/0.6V REF (Pin 6)-unavailable in the 10-pin VSSOP variant.

Key Specifications

Parameter	Value and Actual Design Meaning
Gain	50 V/V - scales 20–100 mV shunt voltage to 1–5 V output for direct ADC interfacing.
Common-Mode Range	–16 V to 80 V - enables direct high-side sensing in 48-V telecom or automotive battery systems.
Bandwidth	300 kHz - supports fast transient detection in switching power supplies up to ~150 kHz switching frequency.
Output Offset Voltage	±2.5 mV (max, –40°C to 125°C) - contributes ≤±5% error at 50 mV sense voltage, critical for low-current accuracy.
Comparator 1 Response Time	1.3 μs (typical, 5-mV overdrive) - ensures sub-microsecond fault flag assertion for overcurrent events.
Quiescent Current	2.2 mA (typ, V_S = 12 V) - enables continuous monitoring in always-on power-rail supervisors without excessive standby loss.
Reference Output	1.2 V ±12 mV (25°C), 40–100 ppm/°C drift - provides stable bias for external comparators or ADC reference scaling.

Pinout & Package

INA204AID is packaged in a 14-pin SOIC (D package), 8.65 mm × 3.91 mm body size, with exposed pad not present. Pin functions are electrically validated per TI SBOS393E Rev. E (November 2015).

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; differential input defines sensed current polarity and magnitude.
CMP1 IN−/0.6V REF	Comparator 1 negative input / override reference	Accepts external threshold or overrides internal 0.6-V reference for flexible trip-point design.
CMP1 IN+	Comparator 1 positive input	Monitors amplified OUT signal or external voltage; rising edge triggers latched CMP1 OUT.
CMP2 IN+	Comparator 2 positive input	Typically driven by OUT or external signal; rising edge initiates programmable delay before CMP2 OUT assertion.
CMP2 IN−/0.6V REF	Comparator 2 negative input / override reference	Enables custom threshold setting or uses internal 0.6-V reference for fixed overcurrent detection.
GND	Analog ground reference	Return path for shunt current, reference outputs, and comparator logic; must be low-impedance.
CMP1 RESET	Active-low latch reset	Pull low to clear CMP1 OUT latch; open or high enables transparent comparator operation.
CMP2 DELAY	Capacitor connection for delay timing	0.1 μF capacitor yields 0.5 s delay; linear relationship (t_D = 5 × C_DELAY) enables precise timeout tuning.
CMP2 OUT	Open-drain delayed fault output	Asserts low after programmed delay when CMP2 IN+ exceeds threshold; requires external pull-up.
CMP1 OUT	Open-drain latched fault output	Latches low on threshold breach until CMP1 RESET is pulsed; enables persistent fault indication.
1.2-V REF	Stable reference voltage output	Provides 1.2 V ±12 mV for external circuitry; capable of sourcing/sinking up to 1 mA.
OUT	Analog voltage output	50× scaled shunt voltage (e.g., 50 mV → 2.5 V); rail-to-rail swing limited to V_S − 0.25 V and GND + 4 mV.
V_S	Power supply input	Single 2.7–18 V supply powers all internal blocks; bypass capacitor required at pin for stability.

Key Features

Feature	Design Value
Dual independent comparators	One latched (CMP1) for persistent fault signaling, one with user-programmable delay (CMP2) for debounced overcurrent response.
1.2-V reference output	Stable, low-drift (40–100 ppm/°C) reference available only on 14-pin packages-enables self-contained threshold generation.
Wide common-mode input range	–16 V to 80 V allows direct high-side sensing in 48-V telecom, industrial 24/48-V, and automotive 12/24-V systems without isolation.
0.6-V internal comparator reference	Internally generated reference accessible at Pins 3 and 6; overridable with external voltage for custom trip points.
High-accuracy current sensing	±2.2% total output error over temperature (–40°C to 125°C) at 120 mV sense voltage-supports precision battery charge/discharge monitoring.
SOIC-14 pin compatibility	Full feature set including 1.2-V REF OUT, CMP2 DELAY, and dual reference override pins-unavailable in 10-pin VSSOP variant.

Applications

Overcurrent Protection in Telecom DC/DC Converters	Battery Charge Management in Notebook PCs
Use Scenario: Monitoring output current of a 48-V input, 12-V output isolated DC/DC converter to prevent MOSFET failure during short-circuit events. IC Role / Device Role / Timing Role: INA204AID senses shunt voltage, amplifies it 50×, and asserts CMP1 OUT (latched) within 1.3 μs when current exceeds 2.4 A (50 mV × 50 = 2.5 V > 0.6 V reference). Use Value: Eliminates need for external op-amp and comparator stages; latched output holds fault state until system controller resets CMP1 RESET.	Use Scenario: Real-time monitoring of charging current into a Li-ion battery pack during constant-current phase in a 19-V adapter-powered notebook. IC Role / Device Role / Timing Role: INA204AID measures mΩ-shunt voltage, outputs proportional analog signal to ADC, while CMP2 triggers delayed shutdown if current exceeds safe limit for >500 ms. Use Value: Programmable delay prevents nuisance trips from inrush transients; 1.2-V REF stabilizes ADC reference for consistent SOC estimation.
Automotive Body Control Module Power Rail Supervision	Welding Equipment Primary Current Limiting
Use Scenario: Supervising 12-V battery-fed power distribution to lighting and HVAC loads in automotive BCM, detecting sustained overloads before fuse blow. IC Role / Device Role / Timing Role: INA204AID's –16 V to 80 V common-mode range accommodates load-dump transients; CMP1 OUT latches on >30 A (60 mV × 50), triggering CAN alert. Use Value: Withstands ISO 7637-2 pulse 5a (–16 V) and pulse 5b (80 V); eliminates need for external transient protection on sense inputs.	Use Scenario: Protecting IGBT gate drivers in resistance spot welders by limiting primary current to 500 A during weld initiation. IC Role / Device Role / Timing Role: INA204AID senses 0.1-mΩ shunt, outputs 2.5 V at 50 A, and drives CMP2 IN+; 0.1 μF on CMP2 DELAY sets 500-ms holdoff before CMP2 OUT asserts. Use Value: Delayed response avoids false trips during arc-strike transients; open-drain outputs interface directly with optocoupled IGBT gate shutdown logic.

Overcurrent Protection in Telecom DC/DC Converters

Battery Charge Management in Notebook PCs

Use Scenario: Monitoring output current of a 48-V input, 12-V output isolated DC/DC converter to prevent MOSFET failure during short-circuit events.

IC Role / Device Role / Timing Role: INA204AID senses shunt voltage, amplifies it 50×, and asserts CMP1 OUT (latched) within 1.3 μs when current exceeds 2.4 A (50 mV × 50 = 2.5 V > 0.6 V reference).

Use Value: Eliminates need for external op-amp and comparator stages; latched output holds fault state until system controller resets CMP1 RESET.

Use Scenario: Real-time monitoring of charging current into a Li-ion battery pack during constant-current phase in a 19-V adapter-powered notebook.

IC Role / Device Role / Timing Role: INA204AID measures mΩ-shunt voltage, outputs proportional analog signal to ADC, while CMP2 triggers delayed shutdown if current exceeds safe limit for >500 ms.

Use Value: Programmable delay prevents nuisance trips from inrush transients; 1.2-V REF stabilizes ADC reference for consistent SOC estimation.

Automotive Body Control Module Power Rail Supervision

Welding Equipment Primary Current Limiting

Use Scenario: Supervising 12-V battery-fed power distribution to lighting and HVAC loads in automotive BCM, detecting sustained overloads before fuse blow.

IC Role / Device Role / Timing Role: INA204AID's –16 V to 80 V common-mode range accommodates load-dump transients; CMP1 OUT latches on >30 A (60 mV × 50), triggering CAN alert.

Use Value: Withstands ISO 7637-2 pulse 5a (–16 V) and pulse 5b (80 V); eliminates need for external transient protection on sense inputs.

Use Scenario: Protecting IGBT gate drivers in resistance spot welders by limiting primary current to 500 A during weld initiation.

IC Role / Device Role / Timing Role: INA204AID senses 0.1-mΩ shunt, outputs 2.5 V at 50 A, and drives CMP2 IN+; 0.1 μF on CMP2 DELAY sets 500-ms holdoff before CMP2 OUT asserts.

Use Value: Delayed response avoids false trips during arc-strike transients; open-drain outputs interface directly with optocoupled IGBT gate shutdown logic.

Equivalent & Alternatives

The following parts are listed as comparable options for similar current-sense monitor with dual-comparator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
INA205AID	100 V/V gain (vs. 50 V/V), 200-kHz bandwidth, same pinout and reference features.	Better resolution at lower currents (e.g., 25 mV → 2.5 V), but reduced bandwidth limits use in >100 kHz switching converters.	Select when sensing sub-100 mV shunt drops where bandwidth <200 kHz is acceptable.
INA206AID	Unidirectional monitor with single comparator, inverted polarity on CMP OUT, no 1.2-V REF, same 50 V/V gain and SOIC-14 package.	Lacks latching and programmable delay; comparator output active-high (vs. open-drain low), no reference output for external circuits.	Select when only one fault channel is needed and system logic accepts active-high signaling without external reference.

Compared with INA204AID, INA205AID trades bandwidth for higher gain sensitivity, while INA206AID reduces integration to cut cost and complexity-neither offers identical dual-comparator flexibility with latching and delay in a single SOIC-14 package.

Availability

INA204AID is available at Aetrix Electronics and suitable for telecom DC/DC supervision, notebook battery charge management, and automotive body control module power rail monitoring requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for INA204AID 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 delivering analog and embedded processing solutions, with over 90 years of innovation in precision analog ICs and power management.

The INA20x family was designed specifically for high-accuracy, high-common-mode unidirectional current sensing in power-constrained systems-targeting telecom, computing, automotive, and industrial equipment where reliability and integrated protection are critical.

FAQ

What is the maximum common-mode voltage the INA204AID can handle?

The INA204AID supports a common-mode input voltage range of –16 V to 80 V. This allows direct high-side shunt sensing in demanding applications such as 48-V telecom rectifiers and automotive load-dump scenarios without external level-shifting circuitry. The specification is guaranteed across the full operating temperature range (–40°C to 125°C) and is validated per TI SBOS393E Absolute Maximum Ratings and Recommended Operating Conditions tables.

Does the INA204AID include an internal voltage reference, and how is it used?

Yes, the INA204AID provides two internal references: a 0.6-V reference accessible at Pins 3 and 6 for comparator thresholds, and a 1.2-V reference output at Pin 12. The 1.2-V REF is stable (±12 mV at 25°C, 40–100 ppm/°C drift) and capable of sourcing/sinking up to 1 mA. It is used to bias external comparators or serve as an ADC reference-only available on 14-pin SOIC and TSSOP packages, not the 10-pin VSSOP variant.

How does the latching function of Comparator 1 work in the INA204AID?

Comparator 1 in the INA204AID features a latching output (CMP1 OUT, Pin 11) that remains asserted low after crossing its threshold until actively reset via the CMP1 RESET pin (Pin 8). When CMP1 RESET is pulled low (≤1.1 V), the latch clears and CMP1 OUT returns high-Z. Leaving CMP1 RESET open or high enables transparent operation. This behavior is electrically verified in TI SBOS393E Figure 30 and Electrical Characteristics table under "Comparator 1" section.

Can the delay on Comparator 2 be adjusted, and what capacitor value gives 1 second?

Yes, Comparator 2 delay in the INA204AID is user-programmable using an external capacitor on the CMP2 DELAY pin (Pin 9). The delay time t_D (seconds) equals 5 × C_DELAY (in μF). To achieve 1 second, a 0.2 μF capacitor is required. This linear relationship is confirmed in TI SBOS393E Section 8.3.4 and Electrical Characteristics table under "Comparator 2 Delay Equation." Capacitor tolerance directly impacts timing accuracy.

What is the bandwidth of the INA204AID, and how does gain affect it?

The INA204AID has a gain-dependent bandwidth: 300 kHz at 50 V/V (its nominal gain), 500 kHz at 20 V/V, and 200 kHz at 100 V/V. Bandwidth is measured with 5 pF load capacitance and specified in TI SBOS393E Section 7.5. This inverse relationship reflects the device's fixed gain-bandwidth product architecture-higher gain reduces usable signal bandwidth, impacting response to fast current transients in high-frequency switching converters.

INA204AID Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: -

Package/Case:: 14-SOIC (0.154", 3.90mm Width)

Packaging:: Bulk

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-SOIC

INA204AID FAQ

1.How can I place an order for INA204AID through Aetrix?

Please submit a Request for Quotation (RFQ) for INA204AID 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 INA204AID reliable?

The price and inventory of INA204AID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA204AID is usually 5 days.

3.What payment methods are accepted for INA204AID?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA204AID transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for INA204AID?

INA204AID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your INA204AID 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 INA204AID?

For technical support, including INA204AID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA204AID requirements.

6.How does Aetrix verify that INA204AID is sourced from the original manufacturer or authorized distributors?

All INA204AID 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 INA204AID meets industry standards.

7.What is the process for return or replacement of INA204AID?

All INA204AID units undergo pre-shipment inspection (PSI). If there is an issue with INA204AID, 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 INA204AID part is unused and in its original packaging.

Return procedure for INA204AID:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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