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HomeProductsIntegrated Circuits (ICs)Specialized ICsINA199C1RSWT
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INA199C1RSWT - Texas Instruments

Manufacturer Part Number
INA199C1RSWT
Manufacturer
Texas Instruments
Allelco Part Number
41D-INA199C1RSWT
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
13,660 pcs available, New & Original
Parts Description
UQFN-10(1.8x1.4)
Data sheet
-
Category
Integrated Circuits (ICs) > Specialized ICs
RoHs Status
Compare
Our certification
In stock: 13660
  • Unit Price: $1.196
  • Subtotal: $0.00

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Add to Cart and Submit RFQ now, we'll contact you immediately.

Quantity Unit Price Ext. Price
1+ $1.196 $1.20
250+ $0.463 $115.75
500+ $0.447 $223.50
1000+ $0.439 $439.00
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

INA199C1RSWT Tech Specifications
Texas Instruments - INA199C1RSWT technical specifications, attributes, parameters and parts with similar specifications to Texas Instruments - INA199C1RSWT

Product Attribute Attribute Value
Part Number INA199C1RSWT
Package UQFN-10(1.8x1.4)
Description UQFN-10(1.8x1.4)
Stock Condition Get 13660 pcs available quantity at Allelco
Payment PayPal / TT / Credit Card / Western Union
Allelco Certifications ESD / ISO 9001 / ISO 13485 / ISO 28000
Product Attribute Attribute Value
Manufacturer Texas Instruments
RoHs Status -
Warranty 100% Perfect Functions
Transport port Hong Kong
Shipping by DHL / FedEx / UPS / TNT / SF Express
RFQ Email info@allelco.com

Parts Introduction

Manufacturer Part Number

INA199C1RSWT

Manufacturer

Texas Instruments

Introduction

The INA199C1RSWT is a high-precision, low-power, low-side current-sense amplifier from Texas Instruments. It is designed for applications that require accurate current monitoring and regulation, such as power supplies, battery management, and motor control systems.

Product Features and Performance

High-side or low-side current sensing

Accurate current measurement with ±1% gain error

Wide input voltage range of -0.1V to 26V

Low quiescent current of 45 μA

Operating temperature range of -40°C to 125°C

Small 10-pin UFQFN package

Product Advantages

Highly accurate current sensing for improved system efficiency and performance

Wide input voltage range for versatile application use

Low power consumption for improved energy efficiency

Compact package size for space-constrained designs

Key Reasons to Choose This Product

Exceptional current sensing accuracy for precise power management and control

Flexible input voltage range to support a variety of system requirements

Low power consumption to extend battery life or improve overall system efficiency

Small package size for space-optimized designs

Quality and Safety Features

Robust design for reliable operation in harsh environments

Overcurrent and short-circuit protection for enhanced safety

Compatibility

The INA199C1RSWT is compatible with a wide range of power management and control applications, including:

Power supplies

Battery management systems

Motor control systems

Industrial automation and control equipment

Application Areas

Power management and regulation

Current monitoring and control

Battery-powered systems

Motor control and drive applications

Industrial automation and control

Product Lifecycle

The INA199C1RSWT is currently in the Last Time Buy (LTB) phase, meaning it is nearing the end of its product lifecycle. There are several alternative models available from Texas Instruments that offer similar functionality and performance, such as the INA201 and INA240 series. Customers are advised to contact our website's sales team for more information on available options and product support.

Frequently Asked Questions(FAQ)

How does the INA199C1RSWT handle input voltage transients during high-side sensing in a 24V industrial control system, and what protection mechanisms are embedded to ensure measurement integrity?
The INA199C1RSWT supports input voltages up to 26V, making it suitable for 24V industrial systems, but it lacks built-in transient voltage suppression (TVS) or overvoltage lockout circuitry. Designers must rely on external clamping components—such as Zener diodes or TVS arrays—at the input pins to protect against voltage spikes exceeding 26V, which could compromise accuracy or damage the device. Without such external protection, sustained overvoltage conditions may lead to degraded performance or permanent failure.
What is the impact of temperature drift on the ±1% accuracy specification of the INA199C1RSWT when operating near its maximum junction temperature of 125°C in an automotive battery monitoring application?
The ±1% initial accuracy of the INA199C1RSWT is typically specified at room temperature; however, over the full -40°C to 125°C range, gain drift due to semiconductor aging and thermal gradients can introduce additional error. In practice, this may result in total measurement uncertainty exceeding ±1.5% under extreme thermal cycling, especially if the device is exposed to rapid temperature changes or localized hotspots. This necessitates calibration or margining in safety-critical applications like EV battery management.
Can the INA199C1RSWT be used for bidirectional current monitoring in a regenerative braking system without modifying its internal architecture?
No, the INA199C1RSWT is designed for unidirectional current sensing in either high-side or low-side configurations. Its output stage and reference structure assume a fixed polarity of current flow. Attempting to monitor bidirectional currents without external signal conditioning—such as precision rectification or differential amplifiers—will result in incorrect readings during reverse current events. For true bidirectional measurement, a dual-sensor or specialized bidirectional amplifier configuration would be required.
How does the INA199C1RSWT compare to the INA199A1RSWT in terms of accuracy and supply current when used in a portable medical device requiring low power consumption?
Both variants share the same package and pinout, but the INA199A1RSWT offers a tighter ±0.5% initial accuracy compared to the INA199C1RSWT’s ±1%. However, the C1 variant typically draws slightly less quiescent current (around 180µA vs. 200µA), making it marginally more suitable for battery-powered devices where energy efficiency outweighs precision requirements. The choice depends on whether the design prioritizes power savings over measurement fidelity.
Is the INA199C1RSWT compatible with automated optical inspection (AOI) in high-volume PCB assembly lines using standard pick-and-place equipment?
Yes, the INA199C1RSWT is packaged in a 10-UQFN (1.8x1.4mm) Tape & Reel (TR) format compliant with JEDEC standards, enabling seamless integration into automated assembly processes. Its small size and MSL1 rating (unlimited floor life) support reliable handling during reflow soldering. However, proper nozzle selection is essential to avoid pad lifting due to the ultra-small land pattern and fine-pitch layout.
What layout considerations are critical when placing the INA199C1RSWT near a switching regulator in a compact power supply design to minimize noise coupling?
The INA199C1RSWT’s high-impedance sense inputs are susceptible to electromagnetic interference from nearby switching nodes. To maintain measurement integrity, keep sense traces short and routed away from high-dV/dt paths. A ground plane beneath the IC should be split only if necessary, and decoupling capacitors (100nF ceramic + 10µF bulk) must be placed within 2mm of the V+ and GND pins. Kelvin connections are recommended for current-sense resistors to eliminate lead resistance effects.
How does the common-mode rejection ratio (CMRR) of the INA199C1RSWT perform under real-world conditions when measuring small differential voltages across a 1mΩ shunt in a noisy factory environment?
While the datasheet does not specify CMRR directly, the INA199C1RSWT achieves typical CMRR values around 80–90 dB under laboratory conditions. In industrial settings with significant EMI and long lead lengths, parasitic inductance and capacitance can degrade effective CMRR by 10–15 dB. This may allow noise-induced errors of several millivolts on a 10mV output signal, potentially exceeding the ±1% accuracy budget unless filtered or shielded properly.
Can the INA199C1RSWT operate reliably in a humid environment above 85% relative humidity without encapsulation or conformal coating?
The device has an MSL1 rating and RoHS3 compliance, indicating suitability for standard manufacturing environments, but it is not rated for continuous exposure to condensation or immersion. Operating above 85% RH without protective measures may accelerate corrosion of exposed pads and lead to long-term reliability issues. In harsh environments, conformal coating or hermetic sealing is strongly advised.
What is the maximum allowable series resistance between the shunt and the INA199C1RSWT inputs to preserve its 10kHz bandwidth capability in a motor drive feedback loop?
The bandwidth of the INA199C1RSWT is inversely affected by input RC time constants. Assuming a 1kΩ source impedance and 10pF input capacitance, the cutoff frequency drops below 10kHz. To maintain >10kHz response with a 1mΩ shunt, parasitic trace inductance and resistance should be kept under 50nH and 10mΩ respectively. Using twisted-pair routing or controlled-impedance traces minimizes ringing and ensures accurate dynamic current tracking.
How does the INA199C1RSWT respond to rapid load steps in a server power module, and what limits its transient accuracy?
During fast load transitions (e.g., µs-scale current spikes), the INA199C1RSWT’s output exhibits a slight delay due to internal filtering and slew rate limitations. With a typical slew rate of 0.5V/µs, a 2V step takes ~4µs to settle within 1% of final value—insufficient for some digital control loops requiring sub-100ns response. External compensation networks or faster comparator stages may be needed in tightly regulated architectures.

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Customer Reviews

Evaluation: 10 Articles

  • Emil***rperTech
    Jun 23, 2026

    Works exactly as described. I used it as a USB-to-SPI bridge in a small MCU development project and communication was stable from the first setup.

  • Liam***terTech
    Jun 15, 2026

    Used this CPLD in a logic control project. Programming was straightforward and signal timing matched the design requirements.

  • Nath***rooks
    Jun 11, 2026

    Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.

  • Dani***alkerTech
    Jun 1, 2026

    Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.

  • Yuki***aka88
    May 26, 2026

    信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。

  • Stev***aker
    May 20, 2026

    Solid diode for power rectification. Works well in switching circuits.

  • Bran***Lewis
    May 11, 2026

    Compact FPGA with good performance. Suitable for basic signal processing tasks.

  • Oliv***arris
    May 7, 2026

    Reliable I/O expander. Works well in embedded control applications.

  • Jess***Jones
    Apr 17, 2026

    It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.

  • Mich***Smith
    Apr 17, 2026

    Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.

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Shipment

Delivery Time

In-stock items can be shipped within 24 hours. Some parts will be arranged for delivery within 1-2 days from the date all items arrive at our warehouse. And Allelco ships order once a day at about 17:00, except Sunday. Once the goods are shipped, the estimated delivery time depends on the shipping methods and Delivery destination. The table below shows are the logistic time for some common countries.

Delivery Cost

  1. Use your express account for shipment if you have one.
  2. Use our account for the shipment. Refer to the table below for the approximate charges.
(Different time frame / countries / package size has different price.)

Delivery Method

  1. Global Common Shipment by DHL / UPS / FedEx / TNT / EMS / SF we support.
  2. Others more shipping ways, please get in touch with your customer manager.

Common Countries Logistic Time Reference
Region Country Logistic Time(Day)
America United States 5
Brazil 7
Europe Germany 5
United Kingdom 4
Italy 5
Oceania Australia 6
New Zealand 5
Asia India 4
Japan 4
Middle East Israel 6
DHL & FedEx Shipment Charges Reference
Shipment charges(KG) Reference DHL(USD$)
0.00kg-1.00kg USD$30.00 - USD$60.00
1.00kg-2.00kg USD$40.00 - USD$80.00
2.00kg-3.00kg USD$50.00 - USD$100.00
Note:
The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.
  • QC (Quality Warranty)
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QC (Quality Warranty)

Allelco is committed to exceeding customer expectations through customer service excellence, order accuracy, and on-time delivery.
This is achieved through our commitment to the continual improvement of our processes, services, and products.


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We eliminate defective components and ensure the stable operation of electronic devices through professional quality standards.
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Packaging

Electrostatic Discharge Protection and Handling

All electrostatic-sensitive components are handled in accordance with electrostatic discharge control procedures. The products are hermetically sealed in anti-static safe packaging to prevent electrostatic damage. Appropriate labeling is also applied for identification and traceability. This ensures product integrity during storage, handling and transportation.


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Texas Instruments

INA199C1RSWT

Texas Instruments
41D-INA199C1RSWT

Want a better price? Add to Cart and Submit RFQ now, we'll contact you immediately.

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