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

Texas Instruments INA208AIDGST

Name: INA208AIDGST
Brand: Texas Instruments
SKU: INA208AIDGST
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: INA208AIDGST

Manufacturer:: Texas Instruments

Category:: Current Regulation/Management

Package:: 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)

Datasheet:: INA208AIDGST.pdf

Description:: IC CURRENT MONITOR 3.5% 10VSSOP

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Product details

Overview

INA208AIDGST from Texas Instruments is a unidirectional current-shunt monitor IC with 100 V/V gain, dual open-drain comparators (one latching with reset, one with user-programmable delay), and integrated 1.2-V reference output. It operates from 2.7 V to 18 V, supports common-mode input voltages from –16 V to 80 V, and delivers 500-kHz bandwidth for precision shunt-based current sensing in high-side or low-side configurations. It is used in server power rail monitoring where overcurrent detection and delayed fault reporting are required.

For engineers reviewing the INA208AIDGST datasheet, INA208AIDGST pinout, INA208AIDGST application, or INA208AIDGST equivalent, key selection criteria include its 100 V/V fixed gain, –16 V to 80 V common-mode range, 1.2-V reference output capability, comparator 2 programmable delay via external capacitor, and SO-14/TSSOP-14 package compatibility with industrial temperature operation (–40°C to 125°C).

Technical Context

The INA208AIDGST implements a precision current-sense amplifier with rail-to-rail output swing (to within 150 mV of Vs and 4 mV of GND), internal 0.6-V comparator references (overridable on pins 3 and 6), and two independent open-drain comparators. Comparator 1 features latch-and-reset functionality controlled by the active-low CMP1 RESET pin; Comparator 2 includes a programmable delay circuit using an external capacitor on the CMP2 DELAY pin (t_D ≈ 5 × C_DELAY in µF).

Its architecture integrates three functional blocks on a single die: a high-common-mode current-sense amplifier (gain = 100 V/V, ±1% gain error max), dual comparators with 1.3-µs typical response time and ±2-mV offset, and a buffered 1.2-V reference with ±100 ppm/°C drift and ±0.5-mV load regulation (0–0.5 mA). All operate from a single supply without requiring split rails or external references.

Key Specifications

Parameter	Value and Actual Design Meaning
Gain	100 V/V - Converts 10-mV shunt voltage to 1-V output; enables accurate measurement of small currents with high signal-to-noise ratio.
Common-mode input range	–16 V to 80 V - Supports direct connection to high-voltage bus rails (e.g., 48-V telecom, 60-V automotive) without level-shifting.
Bandwidth	200 kHz - Sufficient for transient overcurrent detection in DC-DC converters and battery protection circuits.
Reference output	1.2 V ±12 mV - Stable, buffered reference usable for comparator thresholds or ADC calibration; available only on 14-pin packages.
Comparator 2 delay	Programmable up to 0.5 s - Configured via external capacitor (e.g., 0.1 µF → 0.5 s); prevents nuisance tripping during brief inrush events.
Quiescent current	1.8–2.2 mA - Enables low-power operation in always-on monitoring systems without compromising speed or accuracy.
Operating temperature	–40°C to 125°C - Qualified for under-hood automotive, industrial motor drives, and telecom equipment environments.

Pinout & Package

INA208AIDGST is packaged in SO-14 (8.65 mm × 3.91 mm) and TSSOP-14 (5.00 mm × 4.40 mm) surface-mount packages. Both variants share identical pinout and functionality.

Pin/Terminal	Circuit Role	Design Meaning
1 (VS)	Power supply input	Single 2.7–18-V supply; powers all internal blocks including comparators and reference.
2 (OUT)	Current-sense amplifier output	Voltage output proportional to shunt voltage (V_OUT = 100 × V_SENSE); rail-to-rail capable (Vs – 0.15 V min, GND + 4 mV min).
3 (CMP1 IN– / 0.6V REF)	Comparator 1 negative input / reference tap	Internal 0.6-V reference accessible externally; can be overridden with external voltage for custom threshold setting.
4 (CMP1 IN+)	Comparator 1 positive input	Accepts sensed signal or reference-derived voltage; triggers latched output when input exceeds threshold.
5 (CMP2 IN–)	Comparator 2 negative input	Standard comparator input; used with external threshold or internal 0.6-V reference (pin 6).
6 (CMP2 IN+ / 0.6V REF)	Comparator 2 positive input / reference tap	Second 0.6-V reference node; overrideable for asymmetric or adjustable trip points.
7 (GND)	Analog ground	Return path for sense amplifier and comparators; must be connected to system ground plane with low impedance.
8 (CMP1 RESET)	Active-low latch reset	Pull low to clear latched CMP1 OUT state; open or grounded at power-up ensures defined initial comparator state.
9 (CMP2 DELAY)	Comparator 2 delay timing node	Connect external capacitor (0.01–1 µF) to set delay time (t_D = 5 × C in µF); no capacitor = minimal delay (~1.3 µs).
10 (CMP2 OUT)	Comparator 2 open-drain output	Active-low output; requires external pull-up; delays both rising and falling edges per configured C_DELAY.
11 (CMP1 OUT)	Comparator 1 open-drain output	Latched output; remains asserted until CMP1 RESET is pulsed low; used for persistent fault indication.
12 (1.2V REF OUT)	Buffered 1.2-V reference output	Stable, low-drift (±100 ppm/°C) reference; supports ≤1 mA load; not available on 10-pin VSSOP variant.
13 (VIN–)	Shunt low-side input	Connects to low side of current-sense resistor; referenced to GND for low-side sensing or to negative rail for high-side.
14 (VIN+)	Shunt high-side input	Connects to high side of shunt; enables bidirectional common-mode tolerance (–16 V to 80 V) relative to GND.

Key Features

Feature	Design Value
100 V/V fixed gain	Enables direct interface with 12-bit ADCs (e.g., 10-mV shunt drop → 1-V output) without external amplification or scaling resistors.
Dual open-drain comparators	Independent fault signaling: CMP1 provides latched overcurrent alarm; CMP2 offers delayed response to suppress false triggers during startup transients.
1.2-V reference output	Eliminates need for external reference IC in systems requiring precise comparator thresholds or ADC calibration sources.
–16 V to 80 V common-mode range	Supports direct high-side sensing on 48-V data center PSUs or 60-V EV battery packs without isolation or level-shifting circuitry.
Comparator reference override	Pins 3 and 6 accept external voltages (0 V to Vs – 1.5 V), enabling programmable thresholds beyond fixed 0.6-V internal reference.

Applications

Server Power Rail Monitoring	Industrial Motor Drive Protection
Use Scenario: Real-time monitoring of 12-V and 48-V server PSU output rails for overcurrent events during CPU/GPU load surges. IC Role / Device Role / Timing Role: INA208AIDGST senses shunt voltage, outputs amplified analog signal to ADC, and asserts latched CMP1 OUT on overcurrent while CMP2 OUT signals delayed warning via 100-ms capacitor. Use Value: Prevents catastrophic MOSFET failure by triggering immediate shutdown (CMP1) and providing early warning (CMP2) before thermal limits are exceeded.	Use Scenario: Detecting phase current faults in 3-phase BLDC motor drives operating from 60-V DC bus with regenerative braking. IC Role / Device Role / Timing Role: High-side current sensing across shunt with –16 V to 80 V common-mode tolerance; CMP1 latches on short-circuit; 1.2-V REF calibrates ADC for torque control loop. Use Value: Enables fast (<2 µs) fault response while maintaining accuracy across wide temperature range (–40°C to 125°C) in enclosed drive enclosures.
Automotive Battery Management	Telecom Rectifier Module Supervision
Use Scenario: Monitoring 12-V starter battery and 48-V mild-hybrid auxiliary battery for charge/discharge current and overcurrent protection. IC Role / Device Role / Timing Role: Unidirectional sensing on low-side shunts; 100 V/V gain resolves ±50-A range with 100-µΩ shunt; CMP2 DELAY avoids false trips during cranking pulses. Use Value: Meets AEC-Q100 Grade 1 requirements via extended temperature support and robust ESD (±4 kV HBM), reducing BOM count vs discrete solutions.	Use Scenario: Supervising parallel rectifier modules in -48-V telecom systems to detect module failure or imbalance before system-level brownout. IC Role / Device Role / Timing Role: High-side sensing on each module's output; 1.2-V REF stabilizes comparator thresholds across voltage and temperature; CMP1 OUT feeds OR-ing controller fault input. Use Value: Ensures hot-swap compatibility and graceful degradation by isolating faulty modules without interrupting system uptime.

Server Power Rail Monitoring

Industrial Motor Drive Protection

Use Scenario: Real-time monitoring of 12-V and 48-V server PSU output rails for overcurrent events during CPU/GPU load surges.

IC Role / Device Role / Timing Role: INA208AIDGST senses shunt voltage, outputs amplified analog signal to ADC, and asserts latched CMP1 OUT on overcurrent while CMP2 OUT signals delayed warning via 100-ms capacitor.

Use Value: Prevents catastrophic MOSFET failure by triggering immediate shutdown (CMP1) and providing early warning (CMP2) before thermal limits are exceeded.

Use Scenario: Detecting phase current faults in 3-phase BLDC motor drives operating from 60-V DC bus with regenerative braking.

IC Role / Device Role / Timing Role: High-side current sensing across shunt with –16 V to 80 V common-mode tolerance; CMP1 latches on short-circuit; 1.2-V REF calibrates ADC for torque control loop.

Use Value: Enables fast (<2 µs) fault response while maintaining accuracy across wide temperature range (–40°C to 125°C) in enclosed drive enclosures.

Automotive Battery Management

Telecom Rectifier Module Supervision

Use Scenario: Monitoring 12-V starter battery and 48-V mild-hybrid auxiliary battery for charge/discharge current and overcurrent protection.

IC Role / Device Role / Timing Role: Unidirectional sensing on low-side shunts; 100 V/V gain resolves ±50-A range with 100-µΩ shunt; CMP2 DELAY avoids false trips during cranking pulses.

Use Value: Meets AEC-Q100 Grade 1 requirements via extended temperature support and robust ESD (±4 kV HBM), reducing BOM count vs discrete solutions.

Use Scenario: Supervising parallel rectifier modules in -48-V telecom systems to detect module failure or imbalance before system-level brownout.

IC Role / Device Role / Timing Role: High-side sensing on each module's output; 1.2-V REF stabilizes comparator thresholds across voltage and temperature; CMP1 OUT feeds OR-ing controller fault input.

Use Value: Ensures hot-swap compatibility and graceful degradation by isolating faulty modules without interrupting system uptime.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
INA209AIDGST	200 V/V gain, integrated 12-bit delta-sigma ADC, I²C interface, same 14-pin package; no 1.2-V REF OUT.	Replaces analog output with digital reporting; eliminates need for external ADC but adds firmware dependency.	Select INA209AIDGST when digital telemetry, multi-channel monitoring, or programmable thresholds are required; avoid if analog output or standalone comparator operation is mandatory.
MAX40056AUBB+	100 V/V gain, 2.5-V reference (not 1.2-V), no comparator delay, 10-pin µMAX package; higher bandwidth (1 MHz).	Lacks programmable delay and 1.2-V REF; smaller footprint but no reference output for external use.	Select MAX40056AUBB+ when board space is constrained and delay functionality is unnecessary; verify 2.5-V reference compatibility with existing comparator design.

Compared with INA209AIDGST and MAX40056AUBB+, the INA208AIDGST uniquely combines 100 V/V analog gain, dual latched/delayed comparators, and a dedicated 1.2-V reference output in a standard SO-14/TSSOP-14 package-making it optimal for cost-sensitive, analog-centric designs requiring deterministic fault signaling without microcontroller involvement.

Availability

INA208AIDGST is available at Aetrix Electronics and suitable for server power management, industrial motor drive protection, and automotive battery monitoring requiring stable component supply, long-term lifecycle support, and guaranteed traceability.

Supply support for INA208AIDGST 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 specializing in analog and embedded processing technologies, with decades of expertise in precision signal conditioning and power management ICs.

The INA20x family-including INA208AIDGST-is designed for high-accuracy, high-common-mode current sensing in power supply, battery, and motor control systems where reliability, temperature stability, and integrated fault detection are critical.

FAQ

What is the maximum common-mode voltage supported by the INA208AIDGST?

The INA208AIDGST supports a common-mode input voltage range of –16 V to 80 V. This allows direct high-side sensing on industrial 48-V buses or automotive 60-V systems without external level-shifting circuitry. The specification is guaranteed across the full operating temperature range (–40°C to 125°C) and applies to both VIN+ and VIN– inputs simultaneously.

Does the INA208AIDGST require external components to operate its comparators?

The INA208AIDGST includes internal 0.6-V references for both comparators and a 1.2-V reference output on pin 12, so no external references are required. However, external pull-up resistors (e.g., 4.7-kΩ to VS) are needed on CMP1 OUT and CMP2 OUT pins since they are open-drain. A capacitor on CMP2 DELAY (pin 9) is optional but required to enable programmable delay functionality.

Can the INA208AIDGST be used for bidirectional current sensing?

No, the INA208AIDGST is strictly a unidirectional current-shunt monitor. Its architecture measures only the magnitude of current flowing in one direction (from VIN+ to VIN–). For bidirectional sensing, TI recommends the INA226 or INA240 families, which provide signed output and true differential input stages capable of detecting reverse current flow.

What is the purpose of the CMP1 RESET pin on the INA208AIDGST?

The CMP1 RESET pin (pin 8) is an active-low input that clears the latched state of Comparator 1. When CMP1 detects an overcurrent condition, its output (CMP1 OUT) remains asserted until a low pulse is applied to CMP1 RESET. Leaving this pin open or grounded at power-up ensures the comparator starts in a known reset state, preventing spurious fault assertions during startup.

Is the 1.2-V reference output on the INA208AIDGST buffered and load-capable?

Yes, the 1.2-V reference output (pin 12) is internally buffered and specified to drive up to 1 mA while maintaining ±12 mV accuracy and ±100 ppm/°C drift. Load regulation is ±0.4 mV/mA typical, making it suitable for biasing external comparators, calibrating ADCs, or setting precision thresholds without additional op-amp buffering.

INA208AIDGST 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:: 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:: 10-VSSOP

INA208AIDGST FAQ

1.How can I place an order for INA208AIDGST through Aetrix?

Please submit a Request for Quotation (RFQ) for INA208AIDGST 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 INA208AIDGST reliable?

The price and inventory of INA208AIDGST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA208AIDGST is usually 5 days.

3.What payment methods are accepted for INA208AIDGST?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA208AIDGST transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for INA208AIDGST?

INA208AIDGST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your INA208AIDGST 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 INA208AIDGST?

For technical support, including INA208AIDGST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA208AIDGST requirements.

6.How does Aetrix verify that INA208AIDGST is sourced from the original manufacturer or authorized distributors?

All INA208AIDGST 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 INA208AIDGST meets industry standards.

7.What is the process for return or replacement of INA208AIDGST?

All INA208AIDGST units undergo pre-shipment inspection (PSI). If there is an issue with INA208AIDGST, 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 INA208AIDGST part is unused and in its original packaging.

Return procedure for INA208AIDGST:

1.Submit a request within 90 days.

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

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