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HomeProductsIntegrated Circuits (ICs)Linear - Amplifiers - Instrumentation, OP Amps, Buffer AmpsINA157U
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INA157U - Texas Instruments

Manufacturer Part Number
INA157U
Manufacturer
Texas Instruments
Allelco Part Number
32D-INA157U
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
21,031 pcs available, New & Original
Parts Description
IC OPAMP DIFF 1 CIRCUIT 8SOIC
Package
8-SOIC
Data sheet
INA157U.pdf

PCN Design/Specification

Design 25/Feb/2022.pdf
RoHs Status
ROHS3 Compliant
Compare
Our certification
In stock: 21031
  • Unit Price: $2.883
  • Subtotal: $0.00

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Quantity Unit Price Ext. Price
1+ $2.883 $2.88
10+ $2.495 $24.95
30+ $2.22 $66.60
75+ $1.986 $148.95
525+ $1.878 $985.95
1500+ $1.829 $2,743.50
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

INA157U Tech Specifications
Texas Instruments - INA157U technical specifications, attributes, parameters and parts with similar specifications to Texas Instruments - INA157U

Product Attribute Attribute Value
Manufacturer Texas Instruments
Voltage - Supply Span (Min) 8 V
Voltage - Supply Span (Max) 36 V
Voltage - Input Offset 100 µV
Supplier Device Package 8-SOIC
Slew Rate 14V/µs
Series -
Package / Case 8-SOIC (0.154", 3.90mm Width)
Package Tube
Product Attribute Attribute Value
Output Type -
Operating Temperature -40°C ~ 85°C
Number of Circuits 1
Mounting Type Surface Mount
Current - Supply 2.4mA
Current - Output / Channel 60 mA
Base Product Number INA157
Amplifier Type Differential
-3db Bandwidth 4 MHz

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 3 (168 Hours)
REACH Status REACH Unaffected
ECCN EAR99

Frequently Asked Questions(FAQ)

How does the INA157U's input offset voltage of 100 µV impact precision measurement accuracy in high-gain differential amplifier configurations?
The INA157U exhibits a typical input offset voltage of 100 µV, which can introduce significant error when amplified through high gain stages. For instance, in a 100x gain configuration, this offset translates to a 10 mV output error, potentially saturating low-voltage systems or masking small sensor signals. This level of offset requires careful calibration or post-processing compensation in applications such as strain gauge measurements or thermocouple signal conditioning where sub-millivolt resolution is critical.
What are the thermal and power considerations when using the INA157U in battery-powered industrial monitoring systems operating over -40°C to 85°C?
With a quiescent current draw of 2.4 mA and a wide supply range of 8 V to 36 V, the INA157U consumes approximately 19.2 mW at minimum supply (8 V). In extended deployments, this contributes to total system power budget constraints. Over the full industrial temperature range, the device maintains stable performance, but designers must account for increased leakage and potential drift effects at elevated temperatures, especially when sourcing from high-impedance sensors.
Can the INA157U drive capacitive loads effectively without oscillation, and what layout practices ensure stability in high-speed data acquisition front-ends?
While the INA157U has an internal compensation network rated for stable operation with capacitive loads up to 2500 pF, excessive capacitance beyond this threshold may lead to phase margin degradation and instability. To maintain reliability, keep feedback traces short, use minimal PCB trace length between output and load, and avoid adding external capacitors unless absolutely necessary. A series resistance (typically 1–10 Ω) at the output further enhances phase margin in sensitive applications.
How does the INA157U compare to the INA156U in terms of bandwidth and slew rate, and when would one be preferred over the other?
The INA157U offers a 14 V/µs slew rate and 4 MHz bandwidth, whereas the INA156U typically delivers lower performance—around 7 V/µs and 2 MHz—at similar power levels. The INA157U is better suited for fast transient response in motor control feedback loops or ultrasonic sensing, while the INA156U may suffice in slower, precision DC measurement tasks. Selection hinges on required dynamic range versus power efficiency trade-offs.
Is the INA157U suitable for driving piezoelectric sensors requiring high output current and fast settling time in vibration analysis equipment?
Yes, the INA157U’s peak output current of 60 mA enables it to directly drive piezoelectric elements without buffering stages, provided the supply voltage allows sufficient headroom. Its 4 MHz bandwidth and 14 V/µs slew rate support rapid charge transfer needed for accurate acceleration measurements. However, proper shielding and impedance matching are essential to prevent noise pickup, given the high output swing demands.
What precautions should be taken during PCB layout to minimize common-mode noise interference when using the INA157U in unshielded environments?
The INA157U’s high CMRR helps reject differential noise, but poor layout exacerbates residual errors. Place input traces symmetrically to maintain balance, avoid running them parallel to noisy digital lines, and use ground planes beneath the amplifier section. Keep bypass capacitors (0.1 µF ceramic) close to the V+ and V− pins. Differential routing with matched trace lengths reduces skew-induced CMRR degradation, particularly important in long cable runs.
How does the INA157U handle input overvoltage conditions, and what protection components are recommended for automotive diagnostic tools?
The INA157U does not include built-in ESD or overvoltage protection. Exceeding the supply rails by more than ±0.3 V risks latch-up or damage. For automotive applications, pair the INA157U with external Schottky diodes clamping inputs within 0.5 V of supplies, and consider TVS diodes on high-impedance nodes. Always respect absolute maximum ratings even briefly during hot-plug events.
In what scenarios would the INA157U’s wide supply range (8–36 V) provide distinct advantages over rail-to-rail op-amps designed for lower voltages?
The INA157U excels in industrial and automotive environments where single-supply voltages exceed 12 V, such as in 24 V PLC I/O modules or battery-powered diagnostic tools. Unlike many rail-to-rail parts limited to 5 V or less, the INA157U maintains high output swing and clean signal integrity across its full span, enabling direct interface with transducers powered by standard industrial supplies without level-shifting circuitry.

Parts with Similar Specifications

The three parts on the right have similar specifications to Texas Instruments INA157U

Product Attribute INA157UA INA157UA/2K5 INA157UG4 INA157UA/2K5G4
Part Number INA157UA INA157UA/2K5 INA157UG4 INA157UA/2K5G4
Manufacturer Texas Instruments Texas Instruments Luminary Micro / Texas Instruments Luminary Micro / Texas Instruments
Number of Circuits - - - -
Series - - - -
-3db Bandwidth - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Current - Output / Channel - - - -
Voltage - Input Offset - - - -
Voltage - Supply Span (Min) - - - -
Amplifier Type - - - -
Voltage - Supply Span (Max) - - - -
Current - Supply - - - -
Base Product Number - DAC34H84 MAX500 ADS62P42
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Output Type - Current - Unbuffered Voltage - Buffered -
Slew Rate - - - -
Mounting Type - Surface Mount Through Hole Surface Mount

INA157U Datasheet PDF

Download INA157U pdf datasheets and Texas Instruments documentation for INA157U - Texas Instruments.

PCN Design/Specification
Design 25/Feb/2022.pdf

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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.

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Delivery Method

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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.
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Allelco is committed to exceeding customer expectations through customer service excellence, order accuracy, and on-time delivery.
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INA157U Image

INA157U

Texas Instruments
32D-INA157U

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

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