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Texas Instruments INA300AIDGSR
- Part No.:
- INA300AIDGSR
- Manufacturer:
- Texas Instruments
- Category:
- Current Regulation/Management
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
INA300AIDGSR.pdf
- Description:
- IC CURRENT SENSE 10VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,437
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Product details
Overview
INA300AIDGSR from Texas Instruments is a precision current-sense comparator for overcurrent protection, featuring 0 V to 36 V wide common-mode input range, programmable 0–250 mV threshold via single resistor, ±500 µV max offset voltage, 10/50/100 µs selectable response time, and open-drain latched/transparent alert output - deployed in server power rails and telecom DC-DC modules.
For engineers reviewing the INA300AIDGSR datasheet, INA300AIDGSR pinout, INA300AIDGSR application, or INA300AIDGSR equivalent, key selection criteria include common-mode tolerance up to 36 V independent of supply, hysteresis options (2/4/8 mV), disable mode quiescent current ≤3.5 µA, and operation across –40°C to +125°C in VSSOP-10 package.
Technical Context
The INA300AIDGSR integrates differential sensing and threshold comparison in a single analog front-end, with internal 20 µA current source for resistor-based limit programming and configurable digital control inputs (DELAY, HYS, LATCH, ENABLE) that directly set timing, hysteresis, output mode, and power state without external logic. Its RTI offset voltage drift is specified at ≤0.5 µV/°C, and CMR exceeds 100 dB across full temperature range.
It operates from 2.7 V to 5.5 V supply while monitoring shunt voltages up to 36 V common-mode, decoupling sensing accuracy from system rail voltage. The alert output supports both transparent (real-time) and latch (fault-hold) modes, with propagation delay tightly controlled per DELAY pin state: 10 µs (fast transient detection), 50 µs (balanced noise immunity), or 100 µs (high-noise environments).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Common-Mode Input Range | 0 V to 36 V - enables direct sensing on high-side power rails without level-shifting circuitry. |
| Threshold Programmability | 0 mV to 250 mV via single external resistor - simplifies design and field calibration of overcurrent trip points. |
| Input Offset Voltage | ±500 µV max - ensures accurate low-current detection down to ~10 mV sense voltage with <5% error budget. |
| Response Time Options | 10 µs / 50 µs / 100 µs - selectable via DELAY pin to trade speed vs. noise immunity in real-world power systems. |
| Hysteresis Settings | 2 mV / 4 mV / 8 mV - prevents chatter near threshold during slow-rising faults or noisy bus conditions. |
| Quiescent Current | 135 µA max active, 3.5 µA max disabled - supports always-on monitoring and ultra-low-power standby states. |
| Operating Temperature | –40°C to +125°C - qualified for industrial and telecom base station environments with no derating. |
Pinout & Package
VSSOP-10 (DGS) package: 3.00 mm × 3.00 mm body, exposed thermal pad (optional ground connection), 0.5 mm pitch, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 IN+ | Analog input | Connects to supply side of shunt resistor; referenced to common-mode voltage up to 36 V. |
| 2 IN– | Analog input | Connects to load side of shunt resistor; differential pair with IN+ defines sensed current polarity. |
| 3 LIMIT | Analog input | Threshold reference input; accepts resistor-to-ground or external DAC voltage (0–250 mV range). |
| 4 ENABLE | Digital input | Active-high enable; disables comparator and reduces IQ to ≤3.5 µA when low. |
| 5 ALERT | Digital output | Open-drain, active-low fault signal; supports wired-OR configuration and external pull-up to any logic rail. |
| 6 LATCH | Digital input | Selects output mode: low = transparent (real-time), high = latched (requires manual clear). |
| 7 DELAY | Digital input | Sets response time: GND = 10 µs, open = 50 µs, VS = 100 µs - configures internal averaging window. |
| 8 GND | Analog ground | Primary return path for analog circuitry; connects to system ground plane under thermal pad. |
| 9 VS | Analog supply | 2.7 V to 5.5 V single supply; powers internal amplifier, comparator, and digital interface logic. |
| 10 HYS | Digital input | Sets hysteresis: GND = 4 mV, open = 2 mV, VS = 8 mV - stabilizes decision boundary against noise. |
Key Features
| Feature | Design Value |
|---|---|
| Wide common-mode sensing | 0 V to 36 V independent of VS - eliminates need for isolated amplifiers or level shifters in high-voltage rails. |
| Single-resistor threshold tuning | Internal 20 µA current source sets VLIMIT = ILIMIT × RLIMIT - enables precise, repeatable trip point adjustment without DACs. |
| Configurable alert behavior | LATCH pin selects transparent (immediate alert) or latched (persistent fault flag) mode - supports both fast diagnostics and fault logging. |
| Low-power disable mode | 3.5 µA max disabled IQ with 500 nA max input bias - preserves battery life in portable or standby-power-critical systems. |
| Noise-immune timing options | Three discrete delay settings (10/50/100 µs) implemented via internal averaging - avoids external RC filters and layout sensitivity. |
Applications
| Server Power Rail Monitoring | Telecom DC-DC Converter Protection |
|---|---|
|
Use Scenario: Real-time current monitoring on 12 V and 48 V intermediate distribution rails in rack-mounted servers. IC Role / Device Role / Timing Role: High-common-mode comparator detecting overcurrent events before MOSFET failure, with 10 µs response for short-circuit shutdown. Use Value: Prevents catastrophic rail collapse by triggering PMBus-controlled shutdown within 10 µs, preserving downstream ASICs and memory. |
Use Scenario: Overcurrent protection in isolated 48 V to 12 V telecom DC-DC converters operating in harsh ambient environments. IC Role / Device Role / Timing Role: Fault detector interfacing with microcontroller GPIO; uses 100 µs delay to reject switching noise while maintaining fast fault response. Use Value: Enables reliable operation at +85°C ambient with no false trips, reducing field returns due to nuisance alerts. |
| Laptop Battery Charger Safety | Industrial PLC I/O Module Protection |
|
Use Scenario: Secondary-side current limiting in USB-C PD chargers with variable output (5–20 V) and high peak currents. IC Role / Device Role / Timing Role: Shunt-based comparator monitoring charge path; enabled only during active charging via ENABLE pin. Use Value: Reduces standby power by disabling INA300AIDGSR between charge cycles, extending adapter efficiency and thermal margin. |
Use Scenario: Output short-circuit detection on 24 V digital output channels in programmable logic controllers. IC Role / Device Role / Timing Role: Fault sensor feeding into FPGA safety logic; uses 50 µs delay and 4 mV hysteresis to tolerate inductive kickback transients. Use Value: Eliminates need for discrete op-amp + comparator + logic IC stack, shrinking BOM and PCB area by >40%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-sense comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA301AIDGSR | Same pinout, identical VSSOP-10 package, but includes integrated 100 kΩ pull-up on ALERT and fixed 50 µs response - no DELAY/HYS pins. | Best for cost-sensitive designs where only one response time and no hysteresis tuning is required. | Select INA301AIDGSR if simplified configuration and lower unit cost outweigh need for adjustable timing/hysteresis. |
| MAX40056AUTA+ | Wider 76 V common-mode range, 2.5 µs typ response, but requires external reference and lacks integrated limit current source. | Suitable for automotive 48 V systems or ultra-fast protection where sub-10 µs latency is mandatory. | Choose MAX40056AUTA+ only when >36 V common-mode or <10 µs response is essential - adds design complexity and BOM count. |
Compared with INA301AIDGSR, the INA300AIDGSR provides full configurability (timing, hysteresis, latch mode) at modest cost premium; versus MAX40056AUTA+, it trades raw speed and voltage headroom for integration, simplicity, and lower system-level component count.
Availability
INA300AIDGSR is available at Aetrix Electronics and suitable for server power management, telecom DC-DC converter protection, and industrial PLC output module safety requiring stable component supply across extended temperature and long production lifecycles.
Supply support for INA300AIDGSR 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 broad portfolio coverage in precision analog, power management, and signal chain solutions.
The INA300AIDGSR belongs to TI's current-sense comparator product line, designed specifically for robust overcurrent protection in high-reliability power systems where wide common-mode range, low offset, and flexible configuration are critical.
FAQ
What is the maximum common-mode voltage the INA300AIDGSR can monitor?
The INA300AIDGSR supports a common-mode input voltage range from 0 V to 36 V, independent of its 2.7 V to 5.5 V supply voltage. This allows direct high-side sensing on 12 V, 24 V, or 36 V rails without external level-shifting circuitry. The specification is guaranteed across the full –40°C to +125°C operating temperature range and applies to both IN+ and IN– inputs simultaneously.
How do I configure the overcurrent threshold using a resistor on the INA300AIDGSR?
To configure the threshold on the INA300AIDGSR, connect a resistor (RLIMIT) between the LIMIT pin and ground. An internal 20 µA current source develops VLIMIT = 20 µA × RLIMIT. For example, a 10 kΩ resistor sets a 200 mV threshold. The INA300AIDGSR datasheet Table 7-2 provides exact calculation including noise adjustment factor (NAF = 500 µV) for 10 µs delay setting.
Does the INA300AIDGSR support latched fault output, and how is it enabled?
Yes, the INA300AIDGSR supports latched alert output. Drive the LATCH pin high (to VS) to enable latch mode: once ALERT asserts low, it remains latched until LATCH is pulled low again. In contrast, pulling LATCH low configures transparent mode, where ALERT follows the input state in real time. This dual-mode capability is unique to the INA300AIDGSR within TI's current-sense comparator family.
What is the quiescent current of the INA300AIDGSR in disabled mode?
In disabled mode (ENABLE pin low), the INA300AIDGSR draws ≤3.5 µA quiescent current and exhibits ≤500 nA input bias current on IN+ and IN–. This ultra-low disabled IQ enables energy-efficient system architectures - for instance, enabling INA300AIDGSR only during active power-up sequences or fault-check windows in battery-powered equipment.
Can the INA300AIDGSR be used with a 5 V supply while monitoring a 36 V common-mode rail?
Yes - the INA300AIDGSR is explicitly designed for this use case. Its 2.7 V to 5.5 V supply (VS) is fully decoupled from its 0 V to 36 V common-mode input range. When powered from 5 V, the device accurately compares shunt voltages across 36 V rails, with guaranteed performance including ±500 µV offset and 100 dB CMR. No level-shifting or isolation components are needed.
INA300AIDGSR 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 Sense
- Sensing Method:
- High/Low-Side
- Accuracy:
- -
- Voltage - Input:
- 2.7V ~ 5.5V
- Current - Output:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-VSSOP
INA300AIDGSR FAQ
1.How can I place an order for INA300AIDGSR through Aetrix?
Please submit a Request for Quotation (RFQ) for INA300AIDGSR 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 INA300AIDGSR reliable?
The price and inventory of INA300AIDGSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA300AIDGSR is usually 5 days.
3.What payment methods are accepted for INA300AIDGSR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA300AIDGSR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA300AIDGSR?
INA300AIDGSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA300AIDGSR 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 INA300AIDGSR?
For technical support, including INA300AIDGSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA300AIDGSR requirements.
6.How does Aetrix verify that INA300AIDGSR is sourced from the original manufacturer or authorized distributors?
All INA300AIDGSR 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 INA300AIDGSR meets industry standards.
7.What is the process for return or replacement of INA300AIDGSR?
All INA300AIDGSR units undergo pre-shipment inspection (PSI). If there is an issue with INA300AIDGSR, 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 INA300AIDGSR part is unused and in its original packaging.
Return procedure for INA300AIDGSR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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