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INA145UA - Programmable Gain Difference Amplifier | Texas Instruments
The Texas Instruments INA145UA is a programmable-gain difference amplifier with a gain range of 1 V/V to 1000 V/V, 500 kHz bandwidth, 86 dB CMRR, and 570 uA quiescent current in an 8-pin SOIC package. It accepts supply voltages from ±2.25 V to ±18 V and is designed for precision measurement of small differential signals. A difference amplifier is an operational-amplifier circuit that subtracts one input voltage from another and amplifies the resulting differential voltage while rejecting signals common to both inputs. The INA145 belongs to the precision difference-amplifier hierarchy, which includes instrumentation amplifiers and programmable-gain amplifiers used in current sensing, sensor interfaces, and diagnostic equipment. The INA145 integrates a precision operational amplifier with an on-chip resistor network. External resistors connected to its gain-control pins allow gains from 1 V/V to 1000 V/V. Its 500 kHz bandwidth supports higher-frequency measurements than purely static instrumentation amplifiers, while 86 dB common-mode rejection suppresses common-mode interference. The 570 uA quiescent current supports low-power designs, and the specified operating-temperature range is -40°C to +85°C. Electrically, the device is intended for differential signal conditioning where input common-mode range, gain accuracy, output swing, and supply voltage must be considered together. A wide supply range permits operation from low-voltage analog systems to higher-voltage industrial interfaces. Because the gain is set by external resistors, resistor tolerance and temperature coefficient directly influence gain accuracy and common-mode performance. Typical uses include shunt-current measurement in power converters, bridge-sensor signal conditioning, battery and power-system monitoring, medical instrumentation interfaces, and industrial current sensing. The 8-pin SOIC package is also convenient for designs that need an amplifier with a small footprint and conventional surface-mount assembly. Designers should calculate input and output common-mode limits for the selected gain and supply voltage, and should use precision gain resistors with suitable tolerance and temperature stability. Input filtering and careful layout are important when the source impedance is high or the measured signal contains switching noise. The component is available from distributors in stock, but one marketplace identifies the exact MPN as discontinued, so procurement plans should account for lifecycle risk. This product record combines verified manufacturer and distributor information, practical application guidance, lifecycle observations, and drop-in replacement research. It is designed to help engineers evaluate the INA145UA beyond a basic parametric listing while remaining explicit about any specification that requires confirmation from the manufacturer datasheet.
INA146UA - 100V/V High-Voltage Difference Amplifier | TI
Texas Instruments INA146UA is a precision high-voltage, programmable-gain difference amplifier with gain up to 100 V/V, a 550 kHz bandwidth, and an 8-pin SOIC package. It operates from a single 4.5 V to 36 V supply or from dual ±2.25 V to ±18 V supplies. Its 570 µA quiescent current supports low-power instrumentation systems, while its 5 mV input offset specification supports accurate measurement of small differential signals. A difference amplifier is a voltage-feedback amplifier that amplifies the voltage difference between two inputs while rejecting voltage common to both inputs. The INA146 belongs to the precision difference-amplifier family within instrumentation amplifiers and signal-conditioning ICs. Its differential input architecture supports accurate attenuation of high differential voltages, rejection of high common-mode voltages, and compatibility with common signal-processing voltage levels. Key features include a ±15 V high common-mode voltage range, differential gain up to 100 V/V set by external resistors, and a 570 µA low quiescent current. The input common-mode range extends beyond both supply rails, providing inherent input protection and allowing the amplifier to operate when its inputs exceed the local supply voltages. The 5 mV offset and 550 kHz bandwidth balance precision and response speed. Technically, the INA146 uses external gain-setting resistors, allowing the gain to be programmed according to application requirements. This resistor-programmed architecture makes it suitable for measurement systems in which gain must be adjusted across multiple input ranges. The operating temperature range of −40 °C to +125 °C supports industrial equipment, while the single-circuit 8-SOIC package simplifies PCB layout and replacement. Typical applications include high-side current sensing, precision bridge and transducer excitation, industrial process measurement, battery monitoring, and instrumentation where inputs may exceed the amplifier supply rails. The common-mode rejection capability is especially useful when a small sensor signal is superimposed on a larger system voltage. Designers should verify input and output voltage limits, power dissipation, gain-resistor tolerance, and stability across the intended frequency range. Because the common-mode input range extends beyond the rails, PCB creepage, protection, and grounding remain important even though the device offers inherent input protection. External input protection may still be required for sustained overvoltage conditions. This page combines verified manufacturer and distributor information with a parameter comparison, drop-in alternatives, application guidance, and practical design notes to support faster component selection and implementation.
INA148UA - ±200V Differential Amplifier | Texas Instruments
The Texas Instruments INA148UA is a precision, low-power, unity-gain difference amplifier with a ±200 V common-mode voltage range, 100 kHz bandwidth, and 1 V/µs slew rate in an 8-pin SOIC package. It is designed to measure small voltage differences superimposed on high-voltage industrial or automotive signals without requiring the inputs to remain near ground. A difference amplifier is an analog signal-conditioning IC that subtracts two input voltages and amplifies the resulting differential signal. The INA148 belongs to the instrumentation-amplifier application class, uses a monolithic precision bipolar operational amplifier, and incorporates a thin-film resistor network. Its internal unity-gain architecture gives it a gain of one, so the output represents the difference between the two inputs while rejecting voltage shared by both. Key features include a ±200 V common-mode input range, 100 kHz bandwidth, 1 V/µs slew rate, 5 mV input offset voltage, and a minimum common-mode rejection ratio of 70 dB. The electrical operating range is 2.7 V to 36 V, supporting both low-voltage signal conditioning and conventional industrial supply systems. The listed operating-temperature range extends from −55 °C to +125 °C. The high common-mode capability allows small sensor or shunt signals to be measured when both input nodes are riding on a substantially larger voltage. The thin-film network supports stable precision matching, while the bipolar amplifier and unity-gain configuration provide a straightforward implementation for high-side current sensing, industrial measurement, battery monitoring, and grounded signal acquisition. The 100 kHz bandwidth is appropriate for relatively slow sensor and control signals rather than wideband waveform systems. Typical uses include motor and solenoid current feedback, power-converter telemetry, industrial process monitoring, automotive battery sensing, and measurement of small voltages across high-side shunt resistors. The INA148UA is particularly useful when the signal of interest is small but its common-mode voltage is large, and when the system needs an output referenced to a low-voltage analog or mixed-signal domain. Designers should verify input and output voltage limits, external input protection, supply bypass capacitance, and the common-mode range across temperature before applying the device to a new high-voltage design. Differential input filtering and careful routing are also important when long sensor leads or switching power stages are present. The INA148UA does not provide isolation, so its input and supply ratings must be satisfied by the surrounding system. This product page combines verified manufacturer and distributor information with application-oriented engineering guidance, package details, pricing context, and a replacement-oriented comparison. It is intended to help engineers determine whether the INA148UA fits a high-common-mode measurement design and to identify the limitations of any proposed substitute.
INA149N - ±275V High Common-Mode Difference Amplifier | TI
The Texas Instruments INA149N is a precision unity-gain difference amplifier with a very high input common-mode voltage range of up to ±275 V, housed in an 8-pin SOIC package and specified over the extended industrial temperature range of -40C to +125C. A difference amplifier is a type of analog signal-conditioning amplifier that measures only the voltage difference between two input nodes while rejecting any voltage common to both. Within the signal-chain hierarchy, it sits between a raw sensor or power-rail node and an ADC, providing level shifting and common-mode rejection. The difference amplifier category belongs to the broader family of instrumentation amplifiers and amplifier ICs in precision analog front ends. The INA149 is a single, monolithic device consisting of a precision op amp and an integrated, laser-trimmed thin-film resistor network. This integration is the key differentiator: the resistor matching on-chip yields a CMRR and gain accuracy that discrete resistor-op-amp solutions cannot economically match. According to the TI datasheet, the part accurately measures small differential voltages in the presence of common-mode signals up to ±275 V, and its inputs are protected from momentary voltage surges, which matters when probing motor drives, inverters, and industrial power buses. Architecturally, the thin-film network divides the high common-mode input down into the operating range of the internal precision op amp, allowing safe measurement of shunt voltages and bus voltages that sit hundreds of volts above or below the amplifier supply rails. The unity-gain configuration means the output directly reproduces the differential input, simplifying scaling math in firmware. Typical applications include high-side and low-side current sensing in motor drives, DC bus voltage monitoring in industrial inverters, battery-management systems, and data-acquisition front ends where measurement nodes must swing far beyond the ADC range. Design-wise, ensure the reference pin is driven from a low-impedance source, since reference-pin impedance directly degrades CMRR. Layout symmetry of the resistor network inputs preserves accuracy at high common-mode. This page synthesizes verified distributor data, drop-in alternatives, comparison tables, and practical design notes not found in the manufacturer datasheet alone.
INA154U - 3MHz High-Speed Difference Amplifier | Texas Instruments
The Texas Instruments INA154U is a high-speed, precision difference amplifier with a fixed gain of 1, 3 MHz bandwidth, and an 8-pin SOIC package. It is designed for low-cost applications requiring accurate subtraction of two input voltages. Verified manufacturer data identifies the device as a single-circuit differential amplifier specified for operation from -40°C to +85°C. A difference amplifier is a specialized operational-amplifier circuit that subtracts one input voltage from another while rejecting common-mode voltage. In signal-chain terms, the INA154U belongs to the instrumentation-amplifier and differential-input amplifier hierarchy: differential amplifier -> precision analog amplifier -> analog signal-conditioning IC -> semiconductor. Its integrated precision resistor network provides the fixed difference function without requiring four external matched resistors. Verified features include a maximum input offset voltage of ±750 µV, maximum offset drift of ±2 µV/°C, maximum gain error of ±0.05%, and wide bandwidth of 3 MHz. These parameters make the device suitable where differential signal extraction, bridge measurement, current measurement, or sensing of small voltage differences is required. The manufacturer describes the amplifier as high-speed and precision, while the verified search results identify an 8-SOIC package and one amplifier circuit per device. The INA154U is intended for low-cost designs rather than being described as an ultra-low-noise or high-voltage instrumentation amplifier. Its performance should be evaluated against the actual signal amplitude, source impedance, common-mode range, supply voltage, bandwidth, and required accuracy. The reference pin and input common-mode limits are important when selecting external protection, filtering, and bias circuitry. The verified manufacturer datasheet is the authoritative source for electrical limits and pin functions. Typical uses include differential sensor interfaces, balanced audio and communications signal paths, bridge amplifiers, ADC input conditioning, and precision current-shunt measurements. In a typical application, the two inputs are connected to the sensed differential pair and the output presents the scaled difference. Input and output filtering can be added to control bandwidth, suppress switching noise, and protect the amplifier from transients. When laying out the circuit, keep the differential input traces short and matched, connect the reference pin to a low-impedance bias reference when required, and place input filtering close to the amplifier pins. The integrated resistor network's tolerance and temperature drift should be included in the system error budget. This page combines verified manufacturer specifications, source traceability, application guidance, and replacement constraints for practical design review.
INA154UA - 3.1MHz Precision Difference Amplifier | Texas Instruments
Texas Instruments INA154UA is a high-speed, precision difference amplifier with a fixed gain of 1 V/V, 3.1 MHz bandwidth, and 14 V/µs slew rate. The device is supplied in an 8-pin SOIC package and is specified for operation from -40°C to +85°C. It is designed for measuring small differential signals in the presence of larger common-mode voltages. A difference amplifier is an amplifier type that subtracts two input voltages and amplifies the resulting differential signal. The INA154 integrates a precision operational amplifier with a laser-trimmed resistor network, implementing the differential function without requiring an external precision resistor network. It belongs to the broader instrumentation-amplifier and differential-amplifier category within analog signal-chain integrated circuits. Key features include a fixed gain of 1 V/V, maximum input offset voltage of ±750 µV, maximum offset drift of ±2 µV/°C, maximum gain error of ±0.05%, and wide bandwidth of approximately 3 MHz. The device is intended for low-cost, precision differential signal conditioning where the input signal is small relative to the common-mode voltage. The INA154 combines an internal precision amplifier with an integrated, laser-trimmed resistor network. Its high-speed architecture supports signals extending to megahertz frequencies, while the fixed unity gain simplifies system design. Common-mode rejection is valuable in sensor interfaces, industrial measurement systems, and instrumentation applications where unwanted common-mode noise could otherwise obscure the desired differential signal. Typical applications include current sensing, sensor signal conditioning, bridge amplifier inputs, industrial process measurement, and differential communication interfaces. The 8-pin SOIC package makes the device suitable for compact analog boards, provided the designer follows the manufacturer’s recommended input network, supply bypassing, and grounding guidance. The primary design consideration is common-mode voltage and input range. The amplifier’s differential output responds to the difference between the two inputs, but the applied voltages must remain within the device’s permitted operating and common-mode limits. Decoupling capacitors should be placed close to the supply pins, and sensitive analog routing should minimize differential pickup between the input traces. This page consolidates the verified manufacturer and distributor information, distinguishes the fixed-gain INA154UA from general-purpose op-amp alternatives, and highlights package, temperature, offset, bandwidth, and sourcing details useful during component selection.
INA155U - 5.5V 550kHz CMOS INA | Texas Instruments
The Texas Instruments INA155U is a single-supply, rail-to-rail-output CMOS instrumentation amplifier with a 5.5 V maximum supply, 550 kHz bandwidth, and 1 mV offset specification, housed in an 8-pin SOIC package. It is designed for low-voltage sensor and measurement circuits where a differential input must be amplified accurately while operating from one supply. The rail-to-rail output architecture supports signal chains that operate close to the positive supply rail, while the CMOS implementation targets low-power analog signal conditioning. An instrumentation amplifier is a specialized analog IC that amplifies the difference between two input signals while rejecting common-mode noise. INA155U belongs to the broader hierarchy of analog signal-conditioning devices: instrumentation amplifier, differential amplifier, analog amplifier, and semiconductor. This device is particularly useful when a sensor output is small, noisy, or referenced to a changing common-mode voltage and the next stage requires a larger single-ended signal. The manufacturer identifies the INA155 family as a 5.5 V single-supply, 550 kHz, rail-to-rail-output CMOS instrumentation amplifier. The verified distributor data identifies INA155U as a one-circuit, rail-to-rail-output device in an 8-pin SOIC package. The 550 kHz bandwidth makes it appropriate for signal paths that require response beyond static precision measurements, provided the application does not require high-frequency instrumentation-amplifier performance. The INA155U is intended for low-voltage sensor interfaces, portable measurement systems, industrial signal conditioning, and analog-to-digital converter front ends. Its rail-to-rail output can simplify designs using a 3.3 V or 5 V supply because the output can swing close to the upper rail under suitable load conditions. The exact input common-mode range, gain settings, output swing, noise, and current specifications were not included in the verified data and must be checked in the manufacturer datasheet before final design release. For PCB implementation, use a low-noise ground reference, place input and feedback components close to the device, and keep sensitive differential traces short and symmetric. Decoupling capacitors should be placed at the supply pins according to the manufacturer recommendations. Verify the complete signal chain against the datasheet limits, especially when the source impedance, gain, output load, supply voltage, or common-mode input level differs from the nominal application conditions. This page combines the verified INA155U product identity and distributor links with structured application, comparison, and design guidance. It does not infer electrical values that were not explicitly supplied in the retrieved data, and it identifies missing parameters for engineering confirmation.
INA155UA - 550 kHz Single-Supply CMOS Instrumentation Amp | TI
The Texas Instruments INA155UA is a single-supply, rail-to-rail-output CMOS instrumentation amplifier designed for low-voltage signal conditioning. It operates from a 2.5 V to 6 V supply, provides 550 kHz bandwidth, has a 1 mV input offset voltage, and is available in an 8-pin SOIC package. The device is intended for applications requiring differential input measurement, current sensing, sensor interfaces, and low-voltage analog signal conditioning. An instrumentation amplifier is a differential-input analog amplifier that combines high input impedance, accurate gain setting, and common-mode rejection into one integrated device. The INA155UA belongs to the instrumentation amplifier category, which is part of the broader amplifier IC and analog signal-processing hierarchy. Its rail-to-rail output allows the output to approach the supply rails, while its CMOS construction supports low-voltage operation and compact analog designs. The INA155UA provides adjustable gain through external resistors, with the manufacturer describing the device as a 1 mV-offset, 550 kHz rail-to-rail CMOS instrumentation amplifier. The 550 kHz bandwidth is particularly useful for signals that require more bandwidth than a precision-only instrumentation amplifier but do not require the bandwidth of a high-speed differential ADC frontend. The 6.5 V/us slew rate listed in distributor search data helps characterize its ability to respond to changing input conditions. The device is suited to low-voltage sensor conditioning, including bridge and strain-gauge signals, because its differential input architecture rejects common-mode noise when the common-mode voltage remains within the specified input range. It can also be used with current-shunt measurements, where the instrumentation amplifier converts a small differential voltage across a shunt into a larger single-ended signal. The rail-to-rail output is useful in systems where the available output headroom is limited. Typical applications include industrial process measurement, portable instrumentation, battery-powered sensor interfaces, current monitoring, and low-voltage data acquisition. When designing around the INA155UA, confirm the complete input common-mode range, output swing, gain resistor values, supply decoupling, and operating temperature limits against the manufacturer datasheet. Pay particular attention to the distinction between rail-to-rail output operation and rail-to-rail input operation, because only the output characteristic is explicitly identified in the provided verified data. This product record combines verified manufacturer and distributor information, package details, pricing references, replacement guidance, and application-oriented engineering notes. The provided search results confirm the INA155UA's 5.5 V single-supply classification, 550 kHz bandwidth, 1 mV offset specification, rail-to-rail output, CMOS construction, 2.5 V to 6 V supply range, and 8-pin SOIC package.
INA157U - 3MHz Precision Difference Amplifier | Texas Instruments
The Texas Instruments INA157U is a high-speed, precision difference amplifier with a 3 MHz bandwidth, ±500 µV maximum offset voltage, ±2 µV/°C maximum offset drift, and ±0.05% maximum gain error. The device is supplied in an 8-pin SOIC surface-mount package and is specified for operation from -40°C to +85°C. A difference amplifier is a specialized amplifier IC that measures the voltage between two input terminals while rejecting signals common to both inputs. Positioned within the hierarchy of difference amplifier, instrumentation amplifier, operational amplifier, and analog signal-conditioning IC, it is used where accurate subtraction, current-sense measurement, or rejection of common-mode interference is required. The INA157U integrates a precision operational amplifier with a laser-trimmed resistor network. According to the Texas Instruments manufacturer datasheet, the internal resistors are ratio matched, although their absolute values may vary by ±20%. This ratio matching supports accurate gain and common-mode rejection. The listed low offset voltage, low thermal drift, low gain error, and 3 MHz bandwidth make the device useful where both dc accuracy and signal bandwidth matter. Typical applications include differential voltage measurement, current-shunt amplification, industrial sensor interfaces, bridge-sensor signal conditioning, and communication-circuit gain stages. A compact SOIC package supports conventional surface-mount assembly, while the extended industrial temperature range supports equipment operating across temperature extremes. The 3 MHz bandwidth also allows the amplifier to process signals beyond low-frequency precision-only applications. Designers should preserve adequate input and output voltage headroom, verify common-mode and output-swing limits against their actual signal, and route sensitive differential inputs using short, symmetric paths. Because the internal resistor network contributes noise and absolute resistance tolerance, board-level calibration should use ratio accuracy rather than assuming a nominal resistor value. This page combines the verified manufacturer specifications, distributor availability references, practical application guidance, and drop-in comparison information for engineers evaluating the INA157U.
INA157UA - 4MHz Difference Amplifier | Texas Instruments
Texas Instruments INA157UA is a high-speed, precision difference amplifier with 4 MHz bandwidth, one amplifier channel, and an 8-pin SOIC package. The device integrates a precision operational amplifier with a laser-trimmed resistor network, providing a fixed differential gain of 1 and rejecting common-mode signals without requiring an external matched resistor divider. A difference amplifier is a specialized instrumentation amplifier building block that measures the voltage difference between two inputs rather than amplifying either input relative to ground. In the broader semiconductor hierarchy, the INA157UA belongs to the amplifier IC family, specifically the difference-amplifier and instrumentation-signal-chain categories used for current sensing, bridge sensing, and measurement systems. Key features include a 4 MHz bandwidth, low maximum offset voltage of ±500 µV, low offset drift of ±2 µV/°C, and low maximum gain error of ±0.05%. The integrated resistor network eliminates the component-matching and resistor-ratio errors normally associated with discrete difference amplifiers. The INA157UA is available in the 8-pin SOIC surface-mount package. The internal architecture combines a precision operational amplifier with a precision, laser-trimmed resistor network. Its differential input arrangement supports accurate measurement of small voltage differences in the presence of substantially larger common-mode voltages. The 4 MHz bandwidth makes the device suitable for signal chains that require faster response than a conventional precision instrumentation amplifier while retaining integrated gain accuracy. Typical applications include low-side and high-side current sensing, bridge and strain-gauge signal conditioning, industrial process measurement, and differential sensor interfaces. In these systems, the INA157UA converts a small differential sensor voltage into a single-ended output while suppressing common-mode noise. It is particularly useful where an eight-pin surface-mount footprint and integrated resistor network simplify board design. When designing with the INA157UA, verify the input and output voltage limits, supply headroom, common-mode range, and operating-temperature grade against the manufacturer datasheet. Input and output layout should minimize parasitic capacitance and feedback-loop area, while a clean analog ground return is important for precision measurement. Bypass placement and trace routing should follow the datasheet recommendations rather than generic high-frequency layouts. This page combines verified manufacturer and distributor information, same-package substitution analysis, practical design guidance, and specification-by-specification comparison. It is intended to help engineers identify the INA157UA, evaluate genuine drop-in alternatives, and implement the device correctly in precision analog signal chains.
INA166UA - G=2000 Low-Noise Instrumentation Amplifier | TI
The Texas Instruments INA166UA is a single-circuit, internally set G=2000 instrumentation amplifier with a 450 kHz -3 dB bandwidth, 15 V/µs slew rate, 50 µV input offset voltage, and 2.5 µA input bias current in a 14-pin SOIC (D) package. The device uses current-feedback circuitry to provide low noise, low distortion, wide bandwidth, and strong dynamic response when amplifying very small differential signals. An instrumentation amplifier is a differential-input amplifier optimized for precision signal conditioning. It combines high input impedance, accurate differential gain, and common-mode rejection into one device, reducing the need for several precision operational amplifiers and matched resistors. The INA166 belongs to the broader amplifier IC hierarchy and is commonly used where sensors and transducers produce small outputs that must be measured accurately in the presence of larger common-mode voltages. The INA166's fixed gain of 2000 increases a small differential input by a factor of 2000, making it useful for low-level microphone, hydrophone, industrial transducer, and medical-instrumentation signals. Its 450 kHz -3 dB bandwidth provides substantially more bandwidth than a traditional low-noise precision amplifier with a narrow frequency response. The 15 V/µs slew rate supports rapid signal transitions, while the 2.5 µA input bias current helps preserve accuracy with high-impedance sources. The current-feedback architecture differentiates the INA166 from voltage-feedback instrumentation amplifiers that depend on a closed-loop gain resistor. Because its gain is internally set, the circuit does not require an external gain-setting resistor, reducing component count and avoiding sensitivity to external gain-resistor tolerance. The manufacturer describes the device as a very low-noise, low-distortion monolithic instrumentation amplifier intended for low-level signals. Typical uses include precision microphone preamplification, hydrophone signal chains, industrial process-control inputs, bridge-sensor interfaces, and medical monitoring equipment. In each case, the differential input can reject common-mode interference while the fixed high gain converts a millivolt-level sensor output into a range suitable for an ADC or subsequent signal-processing stage. Designers should verify the signal bandwidth and output swing against the datasheet limits, place input and feedback connections for low noise, and provide stable bypassing on the supply pins. The wide bandwidth and slew rate can excite output-stage distortion if the output signal approaches the available output-voltage range, so the gain and sensor bandwidth should be considered together rather than independently. This product record combines the verified manufacturer and distributor data for the INA166UA with lifecycle information, pricing context, package details, application guidance, and a conservative replacement analysis. It distinguishes verified drop-in candidates from related ordering variants so engineers can assess PCB and supply-chain decisions without confusing a different gain option with an exact functional replacement.
INA181A1QDBVRQ1 - 26V AEC-Q100 Bidirectional Current Sense Amp | TI
The Texas Instruments INA181A1QDBVRQ1 is an AEC-Q100-qualified, 26V bidirectional, low- and high-side voltage-output current-sense amplifier with a fixed gain of 20 V/V, housed in a 6-pin SOT-23 (DBV) package. It operates across a -0.2V to 26V common-mode input range, supports a 350 kHz bandwidth, and draws 195 uA typical quiescent current. The A1 gain variant delivers 20 V/V output scaling, making it suitable for low-current shunt monitoring in tight PCB areas. A current-sense amplifier is an analog IC that measures voltage drop across a shunt resistor placed in series with a load, producing a ground-referenced output proportional to load current. Current-sense amplifiers sit in the broader hierarchy of signal-chain ICs -> amplifiers -> instrumentation amplifiers -> current-sense amplifiers, and they are essential building blocks of any power-management system that requires accurate real-time current telemetry for protection, regulation, or efficiency optimization. Key features include bidirectional sensing (single part supports both charge and discharge current on battery rails), 350 kHz bandwidth for fast transient response, rail-to-rail output swing for maximum dynamic range with low supply headroom, and AEC-Q100 Grade 1 qualification with an operating temperature range of -40C to +125C for under-hood automotive deployment. The device integrates a precision thin-film gain resistor network that eliminates external gain-setting components. Internally, the INA181A1QDBVRQ1 uses a chopped-input bipolar front-end with delta-sigma offset correction, achieving 100 uV maximum offset and 1 uV/C typical drift. This architecture rejects 50/60 Hz line-coupled noise and PSRR-induced errors from upstream switching converters, enabling accurate measurement on noisy automotive buses such as 12V battery feeds. Typical applications include automotive body electronics (lighting load monitoring, seat heater current sense), USB Type-C VBUS current monitoring, motor drive H-bridge phase current feedback, battery management systems for e-bikes and power tools, and solar MPPT input-side current sensing. The wide common-mode range handles inductive load transients and load-dump pulses found in 12V/24V automotive systems. When designing with this device, ensure the input pins remain within the absolute maximum ratings even during transients; a small differential RC filter between the shunt and the IN+/IN- pins limits input-stage overdrive. Use a 4-layer PCB with a low-impedance ground pour to avoid ground bounce corrupting the high-side measurement. This page synthesizes distributor pricing, drop-in SOT-23-6 alternatives, and practical design notes not found in the manufacturer datasheet alone.
INA186A3IDCKR - 40V Bidirectional Current Sense Amp | TI
The Texas Instruments INA186A3IDCKR is a 40 V, bidirectional, high-precision, low-power, zero-drift current-sense amplifier in a 6-pin SC-70 (DCK) package. The A3 gain variant sets the fixed internal gain to 100 V/V, and the device accepts common-mode voltages from -0.2 V to +40 V independently of the supply rail. A current-sense amplifier (CSA, also called a current-shunt monitor) is an analog IC that measures the small differential voltage developed across a shunt resistor in series with a load, and converts it to a ground-referenced output voltage proportional to load current. CSAs sit in the signal-chain hierarchy: shunt resistor -> current-sense amplifier -> ADC / MCU / comparator, and they are essential building blocks in the power-management sub-system for accurate telemetry and protection. Key features include a low offset voltage enabled by the zero-drift chopper architecture, picoamp-level input bias current that supports large shunt values for microamp measurements, a low quiescent current (typically tens of microamps) suitable for always-on battery monitoring, an integrated ENABLE pin for power gating, and rail-to-rail output swing for full-scale ADC input utilization. The A3 fixed gain of 100 V/V provides 20 mV/V sensitivity. The architecture combines a precision chopper-stabilized input stage with an internal gain-setting resistor network, eliminating the external gain resistors required by discrete difference-amplifier implementations. The high common-mode rejection and picoamp bias allow designers to use larger sense resistors for better signal-to-noise without measurable loading error. Typical applications include battery-cell monitoring in battery management systems (BMS), USB-C current advertisement and overcurrent protection, motor-phase current sensing in BLDC drivers, solar MPPT input-current telemetry, and precision 24 V industrial-sensor rails. Design tip: pick the A1/A2/A3/A4/A5 gain variant by matching your full-scale shunt voltage to the ADC input range; keep the shunt Kelvin-connected to the IN+/IN- pins and use a 4-wire layout to preserve CMRR at high dV/dt. This page consolidates authorized-distributor pricing for the INA186A3IDCKR, true drop-in alternatives in the same SC-70-6 footprint, and PCB design guidance that goes beyond the manufacturer datasheet.
INA188ID - 36V Zero-Drift Instrumentation Amplifier | Texas Instruments
The Texas Instruments INA188ID is a single-channel, 36 V zero-drift instrumentation amplifier with rail-to-rail output, selectable gain from 1 to 1000, and an 8-pin SOIC package. It provides a gain of 1 + (50 kΩ/RG), allowing one external resistor to set the gain while preserving the established instrumentation-amplifier connection. According to the Texas Instruments product page, the INA188ID is intended for precision signal measurement and sensor conditioning, including temperature sensing and bridge-based measurements, and is specified over a -40°C to +125°C temperature range. An instrumentation amplifier is a specialized differential amplifier that measures a small voltage difference between two inputs while offering high input impedance, common-mode rejection, and gain accuracy. The INA188 belongs to the zero-drift instrumentation-amplifier family, a subtype of precision analog amplifiers used for sensor interfaces, current measurement, biomedical instrumentation, and industrial process control. Its internal auto-zeroing techniques reduce offset voltage and offset drift, making it more suitable for slowly varying precision signals than a conventional amplifier whose offset moves with temperature. Key features include a 36 V maximum supply voltage, rail-to-rail output operation, gains from 1 to 1000, and a maximum input offset voltage of 55 µV as reported by the comparative distributor data. The reference pin supports output level shifting in single-supply systems and offset calibration. A single gain-setting resistor simplifies design-in, while the zero-drift architecture addresses offset stability in temperature, bridge, and slow-current-measurement systems. The 8-pin SOIC package also supports conventional surface-mount assembly. The gain relationship G = 1 + (50 kΩ/RG) allows the sensor interface to be scaled without an active gain network. For example, a 1 kΩ gain resistor produces a nominal gain of 51, while a 50 Ω resistor produces a nominal gain of 1001 before rounding and standard gain-error considerations are applied. The reference input provides an additional analog node for systems that cannot shift their output entirely in the analog domain. Designers should preserve the instrumentation-amplifier grounding and input-common-mode requirements when evaluating usable signal range. Typical uses include strain-gauge and load-cell bridges, RTD and thermocouple signal conditioning, precision current-shunt measurements, battery monitoring, and low-level sensor acquisition. The INA188ID is particularly appropriate when low offset and low drift matter more than wideband response. In bridge systems, its differential input arrangement and adjustable gain can amplify the small bridge imbalance while limiting sensitivity to common-mode voltage. In battery-powered equipment, the reference pin can place the output within the usable range of a single-supply analog-to-digital converter. The primary design consideration is ensuring that input and output common-mode voltages remain inside the device's operating limits at every gain and supply condition. Gain-set resistor tolerance contributes directly to gain accuracy, so precision resistors may be required for calibrated measurements. Input filtering, source impedance, reference-pin routing, and exposed-area thermal management should also be evaluated before production release. This product page consolidates manufacturer specifications, verified distributor pricing, package details, comparison data, and practical design guidance. It also distinguishes verified drop-in candidates from broader functional alternatives so engineers can assess footprint, gain-setting, voltage-range, and precision differences before changing a production design.
INA188IDRJR - 36V Zero-Drift Instrumentation Amplifier | Texas Instruments
The Texas Instruments INA188IDRJR is a precision, zero-drift, rail-to-rail output, high-voltage instrumentation amplifier housed in an 8-pin SON (4x4 mm) package with an exposed thermal pad. It delivers 55 uV (max) input offset voltage, 0.2 uV/°C (max) input offset drift, and 104 dB (min) CMRR at gains of 10 or higher. The part operates from a wide 4 V to 36 V single supply (or ±2 V to ±18 V dual supply), accepting input signals up to the rails while swinging its output rail-to-rail. An instrumentation amplifier (INA) is a specialized differential amplifier designed for precise amplification of small differential signals in the presence of large common-mode voltages. Compared to a general-purpose op-amp built from three discrete amplifiers, an INA integrates the input buffer, gain stage, and difference amplifier into one laser-trimmed silicon block, achieving far higher common-mode rejection ratio (CMRR), lower offset drift, and far simpler single-resistor gain setting. INAs sit hierarchically inside the sensor signal-chain / analog front-end / mixed-signal IC family and are the building block of choice for bridge sensors, thermocouples, RTDs, and biomedical instrumentation. Key features include 12 nV/√Hz input voltage noise density at 1 kHz, 0.25 uVPP (0.1 Hz to 10 Hz) low-frequency noise, an industry-standard gain equation G = 1 + (50 kΩ / RG) settable from 1 V/V to 1000 V/V with a single external resistor, and a reference pin for level-shifting in single-supply operation or for offset calibration. The integrated zero-drift (chopper-stabilized) topology continuously nulls its own 1/f noise and offset, eliminating the need for periodic user calibration. The INA188 uses TI's proprietary auto-zero / chopper-stabilized architecture combined with thin-film resistor networks for the gain-setting feedback. This delivers near-ideal DC accuracy without the discrete capacitor or clock-noise artifacts of older chopper designs, while the 4 mm x 4 mm SON package exposes its complementary efficiency rating to standard SOIC-8 boards through its thermal pad. Typical applications include weigh scales and bridge sensor signal conditioning, thermocouple and RTD temperature measurement, medical instrumentation (ECG, EEG front ends), industrial process controls, and strain-gauge amplifier chains. The wide 4 V to 36 V supply range makes it a direct fit for industrial 24 V bus systems. When designing, place the gain-setting resistor close to the RG pins and add a 0.1 uF supply bypass capacitor on each supply pin; the exposed thermal pad must be soldered to a copper pad for rated thermal performance. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
INA190A1IRSWR - 40V Picoamp Current Sense Amp | TI
The Texas Instruments INA190A1IRSWR is a 40V bidirectional, zero-drift current sense amplifier (current-shunt monitor) with picoampere input bias current and an enable pin, housed in a 10-pin UQFN (RSV, 1.8 mm x 1.4 mm) package. It senses voltage drops across shunt resistors at common-mode voltages from -0.2 V to +40 V, independent of its 1.8 V-class low supply. A current sense amplifier is a specialized difference amplifier that measures the small voltage generated across a shunt resistor and converts it into a ground-referenced output signal. Within the power-management hierarchy, it sits between the shunt and an ADC or comparator, enabling precise current measurement for feedback, protection, and telemetry in systems from battery packs to industrial drives. Key features of the INA190 family include a very wide input common-mode range (-0.2 V to 40 V) that tolerates inductive kickback and reverse-battery events, ultra-low input bias current in the picoampere range that permits very small shunt resistors, and zero-drift architecture for near-DC accuracy. The INA190A1IRSWR offers an ENABLE pin for power-cycling in battery-powered designs and operates across -40C to +125C. Technically, the device uses a zero-drift (auto-zeroing) topology that eliminates offset drift over time and temperature, achieving precision far beyond conventional CMOS amplifiers. The low bias current allows shunts in the milliohm range without significant self-heating error, while the wide common-mode range permits high-side, low-side, and bidirectional sensing with a single supply. The voltage-output interface connects directly to ADCs without external conditioning. Typical applications include overcurrent protection in USB and battery-powered systems, precision current telemetry in notebooks and IoT devices, and closed-loop current feedback in industrial controls, where low shunt losses and accuracy at low supply voltages are essential. Design consideration: because the part supports a 1.8 V supply domain, verify the output swing and reference pin drive against your ADC input range to avoid clipping near the rails. This page synthesizes distributor pricing, drop-in alternatives, pinout guidance, and practical design notes not found in the manufacturer datasheet.
INA190A2IDDFR - 40V Bidirectional Current Sense Amp | TI
The Texas Instruments INA190A2IDDFR is a 40-V bidirectional, ultra-precise current-sense amplifier with picoamp-level input bias current and an integrated ENABLE pin, offered in an 8-pin TSOT-23 (DDF) package. The A2 gain option delivers a fixed 50 V/V transimpedance, supporting common-mode voltages from -0.2 V to +40 V independent of the supply rail. The zero-drift chopper-stabilized architecture keeps input offset voltage below 15 uV (typical 5 uV) and offset drift below 0.1 uV/C, which translates directly into accurate microamp-range current measurements when paired with a small shunt. A current-sense amplifier is an analog building block that converts a small differential voltage developed across a shunt resistor into a ground-referenced output voltage proportional to load current. The INA190 family belongs to the current-sense amplifier / instrumentation amplifier / signal-chain IC / analog IC taxonomy, sitting one level below general-purpose op-amps because it integrates a precision gain network and reference-stable input stage optimized for high common-mode rejection at high voltages. This category plays a central role in modern power management, where system optimization, telemetry, and closed-loop feedback demand accurate, low-latency current data. Key features include a 1.8-V to 5.5-V supply range, 65 uA typical quiescent current, 60 V common-mode transient immunity, and 40 kHz small-signal bandwidth. Output swings rail-to-rail and the device supports low-side, high-side, and bidirectional topologies, eliminating external protection circuitry in 12-V, 24-V, and 48-V industrial buses. The picoamp input bias current allows sense resistors up to tens of kilo-ohms, which is critical for monitoring sleep-mode current in battery-powered products without degrading accuracy. The zero-drift chopper architecture continuously nulls 1/f noise and thermal drift, yielding effectively DC-stable output over the full -40C to +125C operating range. The internal EN pin lets a microcontroller gate the supply current down to a sub-microamp leakage level, which is essential for always-on battery systems that must periodically wake to perform current sampling. Combined, these characteristics make the INA190A2 one of the lowest-noise, lowest-drift current-sense amplifiers in its class. Typical applications include USB-PD and Type-C cable-compensation, motor-control current loops, solar MPPT input monitors, battery-pack gas-gauging, and point-of-load telemetry in servers and telecom rectifiers. The fixed 50 V/V gain optimizes the part for low-current (sub-amp) measurements where the A1 (25 V/V) is too noisy and the A3 (100 V/V) or A4 (200 V/V) variants sacrifice dynamic range. A key design consideration is the trade-off between shunt resistance and dissipated power: choose a 50 V/V part when the load is typically below 1 A and milliohm shunts are preferred, and place the input capacitor network as close as possible to the IN+ and IN- pins to reject high-frequency transients on the common-mode bus. This page synthesizes distributor pricing, drop-in alternatives in the same TSOT-23-8 footprint, and practical design notes that go beyond the manufacturer datasheet to help engineers select, source, and qualify the INA190A2IDDFR for their next precision current-monitoring design.
INA210BQDCKRQ1 - AEC-Q100 26V Bi-Directional Current Sense Amp | TI
The Texas Instruments INA210BQDCKRQ1 is an AEC-Q100 qualified, 26 V, bi-directional, high-precision current sense amplifier (also called a current-shunt monitor) housed in a 6-pin SOT-SC70 (DCK) package. It senses voltage drops across shunt resistors at common-mode voltages from -0.3 V to 26 V, independent of the supply voltage, and delivers an analog output proportional to the sensed current with a fixed gain of 200 V/V. A current sense amplifier is a specialized analog building block that converts a small differential voltage developed across a current-sense (shunt) resistor into a ground-referenced, amplified output voltage. It sits in the signal chain between the shunt resistor (placed in series with the load) and the downstream ADC, microcontroller, or comparator, and belongs to the broader hierarchy of instrumentation amplifiers -> operational amplifiers -> analog ICs. Zero-drift chopper-stabilized topology enables the INA210 family to achieve microvolt-level offset and excellent common-mode rejection. Key features include a maximum offset voltage of 35 uV, a gain error of only 0.5 percent (max), and 40 kV/us slew rate, plus a 2.7 V to 26 V supply range with 65 uA typical quiescent current. The device offers bidirectional sensing (REF input allows positive or negative current measurement), operates from -40C to +125C, and integrates EMI filtering plus thermal shutdown. The SC70-6 package occupies roughly 2.1 mm x 1.45 mm of PCB area, ideal for compact automotive modules. The INA210 uses a chopper-stabilized input stage and precision thin-film resistors to achieve gain accuracy and ultra-low offset drift over temperature. Its high common-mode rejection ratio (CMRR) of 140 dB and the ability to operate with the input common-mode above V+ make it tolerant of inductive loads, motor inrush, and 12 V/24 V automotive transients such as load-dump. Typical applications include automotive body electronics (battery management, ECU power monitoring), motor control current loops, solenoid and valve actuation feedback, USB Type-C current advertisement (BC 1.2), and precision 48 V telecom/industrial rails. The combination of AEC-Q100 qualification, wide common-mode range, and small package makes it especially well-suited for safety-relevant automotive systems. When designing with this device, place the shunt resistor close to the input pins to minimize parasitic resistance, use Kelvin connection to the shunt, and add a small RC filter at the output to limit noise bandwidth. Choose the shunt value so that the maximum differential input (Vshunt_max = VSENSE_max / 200) does not exceed the linear input range, accounting for transient overloads. This page synthesizes distributor pricing, same-brand and cross-brand drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
INA2126P - Dual 36V Micropower Instrumentation Amplifier | Texas Instruments
The Texas Instruments INA2126P is a dual-channel, micropower precision instrumentation amplifier designed for accurate differential-signal acquisition. Each channel uses a two-op-amp architecture and consumes 175 µA of quiescent current, while the device operates from ±1.35 V to ±18 V, equivalent to a 36 V maximum total supply range. The INA2126P provides 250 µV offset performance and is supplied in a 16-pin PDIP package for through-hole PCB designs. An instrumentation amplifier is a specialized analog signal-conditioning IC that amplifies the voltage difference between two inputs while rejecting common-mode interference. The INA2126 family belongs to the instrumentation amplifier hierarchy, which includes differential amplifiers, low-noise analog amplifiers, and broader analog signal-chain ICs. Its differential-input architecture makes it suitable for sensor signals, bridge outputs, and other small-signal measurements where the wanted signal is small relative to an imposed common-mode voltage. The principal features of the INA2126P are its dual-channel configuration, 175 µA per channel quiescent current, 250 µV offset specification, and wide ±1.35 V to ±18 V operating range. Micropower consumption reduces the burden on portable and battery-powered systems, while the wide supply range supports both low-voltage portable instrumentation and higher-voltage industrial measurement systems. The differential architecture also helps preserve signal integrity when the input common-mode voltage is substantially larger than the differential signal being measured. The INA2126 family uses a two-op-amp instrumentation-amplifier topology to provide differential amplification with high input impedance and common-mode rejection. Because the device is intended for precision acquisition rather than high-bandwidth signal processing, designers should use the manufacturer-recommended gain-setting resistor and follow the datasheet layout guidance to minimize gain error and offset contributions. The 16-pin PDIP package favors through-hole prototyping, laboratory instrumentation, and industrial control boards where a surface-mount package is not required. Typical applications include portable sensor acquisition, strain-gauge and bridge excitation systems, battery-powered measurement equipment, industrial process monitoring, medical instrumentation, and low-power data-acquisition systems. In each case, the INA2126P provides a practical way to amplify a differential sensor signal while keeping channel quiescent current at 175 µA. Designers should confirm that input common-mode voltage, output swing, gain, bandwidth, and supply limits satisfy the specific measurement requirements. The primary design consideration is ensuring adequate output headroom and checking the gain-dependent bandwidth and input range. The 250 µV offset specification supports precise measurements, but resistor matching and layout still influence overall system accuracy. Input filtering and guarding can reduce high-frequency interference, while stable reference and excitation arrangements are important for bridge-based sensors. This product page combines the verified Texas Instruments product information, distributor availability references, pricing context, package details, and engineering selection guidance to provide a practical comparison point for engineers evaluating the INA2126P.
INA2126U - 36V Dual Micropower Instrumentation Amplifier | Texas Instruments
The Texas Instruments INA2126U is a dual-channel, 36 V micropower precision instrumentation amplifier with 250 µV offset, 175 µA quiescent current per channel, and a 16-pin SOIC package. It supports a wide ±1.35 V to ±18 V operating range and is designed for accurate, low-noise differential-signal acquisition. The device provides a gain range of 5 to 10000, a typical gain-bandwidth product of 200 kHz, and a typical input noise density of 0.4 nV/√Hz at 1 kHz. An instrumentation amplifier is a precision analog signal-conditioning IC that converts a small differential input into a single-ended or differential output. Its internal gain stage rejects common-mode interference and permits accurate measurement of low-level sensor signals. In the product hierarchy, an instrumentation amplifier belongs to the amplifier IC family, specifically the precision measurement and signal-conditioning category. It is distinct from a general-purpose operational amplifier because it integrates input buffering, differential subtraction, and gain-setting resistors. The INA2126U combines a gain range of 5 to 10000 with low offset and low noise. Its 250 µV maximum input offset supports accurate measurements at relatively high gain, while the 0.4 nV/√Hz typical noise density helps preserve weak-signal information. Two amplifiers are provided in each package, making the device useful when a system needs two independent differential measurement channels without using two separate packages. The two-op-amp architecture keeps quiescent current to 175 µA per channel, which is important in battery-powered equipment. The 200 kHz typical gain-bandwidth product provides useful bandwidth for slow sensor signals rather than high-speed video or communications signals. An operating supply of ±1.35 V to ±18 V allows operation from low-voltage portable rails through ±15 V industrial measurement systems, subject to the device's 36 V maximum total supply range. Typical uses include battery-powered portable instrumentation, low-level bridge and transducer measurement, industrial sensor acquisition, precision current sensing, and differential signal conditioning. The dual-channel organization can support two sensors in one instrument, while the micropower operation reduces the effect of the amplifier on battery life. Input common-mode and output swing limits must still be checked against the intended sensor and supply rails. Designers should use the gain-setting resistors and input common-mode network specified by the manufacturer, keep sensitive input traces short, and provide suitable bypassing close to the supply pins. The input network must also avoid excessive imbalance between the differential inputs because that can affect common-mode rejection and gain accuracy. Output loading and downstream ADC acquisition time should be evaluated together. This page combines manufacturer specifications, verified distributor availability, and practical comparison guidance with same-package alternatives. It also identifies missing pricing, pin-definition, environmental, and compliance details instead of estimating them, supporting faster component selection for precision analog designs.
INA2128P - Dual Precision Instrumentation Amplifier | TI
The Texas Instruments INA2128P is a dual, low-power instrumentation amplifier with two independent amplifiers, a gain range of 1 to 10,000, and a 200 kHz bandwidth at a gain of 100. The device is offered in a 16-pin PDIP package. Its precision characteristics include 50 uV maximum offset voltage, 0.5 uV/degree C maximum input offset drift, 5 nA maximum input bias current, and 120 dB minimum common-mode rejection. An instrumentation amplifier is a differential analog signal-conditioning IC that amplifies the voltage difference between two inputs while rejecting common-mode interference. In the signal-chain hierarchy, an instrumentation amplifier is a specialized amplifier, a precision analog front end, and an active analog integrated circuit. The INA2128P uses a three-op-amp arrangement and current-feedback input circuitry to preserve useful bandwidth even when relatively high gain is selected. A single external resistor sets the gain from 1 to 10,000, simplifying adjustment during design and calibration. The 200 kHz bandwidth available at gain 100 supports accurate amplification of sensors and low-frequency measurement signals without requiring the bandwidth of a high-speed instrumentation amplifier. Input protection extending to plus or minus 40 V also helps control fault energy applied to the input pins, although it does not eliminate the need for normal application-level protection. The INA2128P provides two amplifier circuits in one package, allowing a dual-channel design to reduce board area and component count. Its low offset voltage and low drift are particularly useful when the amplified differential signal is small relative to the measurement resolution. The specified 120 dB minimum common-mode rejection helps suppress noise and voltage that appears equally on both inputs, while the low 5 nA maximum input bias current suits high-impedance sources. Typical uses include bridge-sensor signal conditioning, portable instrumentation, biomedical measurement, industrial process monitoring, and two-channel sensor acquisition. The device can also amplify differential outputs from transducers where low offset and common-mode rejection are more important than wide-bandwidth conversion performance. Designers should follow the manufacturer datasheet for the gain-setting resistor, supply bypassing, input protection, and pin assignments. The power-supply range is plus or minus 18 V, so both positive and negative rails are permitted when the circuit requires bipolar input or output ranges. Decoupling capacitors should be placed close to the supply pins, and source impedance should remain compatible with the amplifier's bias-current and bias-voltage requirements. This page combines verified manufacturer and distributor information with package-aware alternatives, application guidance, and engineering-focused selection notes. It also separates verified INA2128P data from parameters that require confirmation in the full datasheet, helping engineers plan a board revision without treating incomplete data as guaranteed specifications.
INA2132U - Dual 36V Difference Amplifier | Texas Instruments
The Texas Instruments INA2132U is a dual, low-power, single-supply difference amplifier operating from 2.7 V to 36 V and providing two matched amplifier channels in a 14-pin SOIC package. Its input stage supports common-mode voltages from -15 V to 28 V, while a minimum common-mode rejection ratio of 76 dB helps reject equal-magnitude signals applied to both inputs. The device operates over a -40 °C to 85 °C temperature range and is suitable for industrial measurement, sensing, and signal-conditioning systems. A difference amplifier measures the voltage between two input nodes rather than amplifying a single node relative to ground. In the signal-chain hierarchy, the INA2132U is a difference amplifier, which is a subtype of instrumentation amplifier, and ultimately belongs to the broader amplifier and analog signal-conditioning categories. The dual-channel configuration allows one package to handle two differential sensing channels while maintaining consistent amplifier characteristics between them. Key features include the 2.7 V to 36 V single-supply operating range, 76 dB minimum common-mode rejection, and a -40 °C to 85 °C industrial temperature rating. The low-power architecture is appropriate for systems in which every milliampere affects battery life, thermal rise, or analog headroom. A common-mode range extending below ground makes the device useful in shunt-monitoring systems where the signal may be referenced to a supply rail rather than to ground. The INA2132U is designed for differential measurements where the useful information is small compared with the common-mode voltage. Both amplifier channels are implemented in the same device, which supports matched measurements and reduces the number of external packages required. Its SOIC package also supports conventional surface-mount assembly, although exposed-pad thermal management is not specified in the available ordering information. Typical applications include high-side or low-side current sensing, bridge-sensor signal conditioning, battery monitoring, industrial process measurement, and differential voltage acquisition. When designing around this part, verify the signal amplitude, common-mode limits, and output-swing requirements against the application before committing the footprint. This page combines manufacturer product information, verified distributor pricing and availability, and engineering guidance that goes beyond a basic distributor listing. It also documents where additional datasheet parameters are required so engineers can distinguish confirmed values from information that must still be checked against the manufacturer datasheet.
INA2133U - Dual 1.5MHz Precision Difference Amplifier | TI
Texas Instruments INA2133U is a dual-channel, unity-gain precision difference amplifier built around laser-trimmed precision resistor networks. The verified manufacturer information identifies a 1.5 MHz bandwidth, a maximum offset voltage of 450 µV, approximately 0.95 mA of power consumption, and a 14-pin SOIC package. These characteristics position the INA2133U as a high-speed instrumentation amplifier for measuring small differential signals superimposed on larger common-mode voltages. A difference amplifier is an analog signal-conditioning IC that subtracts two input voltages and amplifies the resulting differential component. In the broader electronics hierarchy, it belongs to the instrumentation-amplifier family, which sits within precision analog amplifiers, analog ICs, and semiconductors. Such devices are commonly used to reject common-mode interference, amplify sensor outputs, and preserve signal integrity between sensors and analog-to-digital converters. The INA2133U provides two precision difference amplifiers in one 14-pin SOIC package. Its 1.5 MHz bandwidth supports signal acquisition beyond very slow sensor applications, while the 450 µV maximum offset specification limits input-referred error during low-level measurements. The low 0.95 mA power figure also makes it relevant to compact industrial, communications, and test equipment where each milliampere affects thermal and power-budget requirements. According to the Texas Instruments product page, the device is designed for high-speed precision differential signal conditioning. Internally, the INA2133 combines a precision operational-amplifier core with an on-chip, laser-trimmed resistor network. The manufacturer describes the INA133 and INA2133 families as unity-gain difference amplifiers using high-slew-rate precision operational amplifiers. Laser trimming improves resistor matching and gain accuracy, while matched resistor temperature coefficients help preserve common-mode rejection and gain accuracy over temperature. The dual-channel implementation reduces package count when two independent differential measurements are required. Typical uses include current-sense and low-voltage bridge measurements, industrial sensor interfaces, communications-line signal conditioning, precision test equipment, and differential inputs to data converters. The 1.5 MHz bandwidth is particularly useful when the measured differential signal must be captured without the long settling delays associated with lower-bandwidth instrumentation amplifiers. The 450 µV offset specification should nevertheless be evaluated against the smallest signal amplitude that the application expects to measure. When designing around the INA2133U, check input common-mode range, output swing, supply voltage, gain configuration, and the input/output network required by the selected operating mode. Place the device close to the signal source, maintain short differential traces, and use a quiet return path so that connector or routing noise does not degrade the differential measurement. Decoupling capacitors should be positioned at the supply pins according to the manufacturer application guidance. This page combines the verified manufacturer specifications, current distributor availability, same-family drop-in options, application guidance, and practical design notes. It also distinguishes verified INA2133U characteristics from parameters that still require confirmation from the complete manufacturer datasheet or application-specific calculations.
INA213BQDCKRQ1 - 26V Bidirectional Current-Sense IC | TI
The Texas Instruments INA213BQDCKRQ1 is an AEC-Q100 automotive-grade, voltage-output, bidirectional current-shunt monitor rated for common-mode voltages from -0.3V to 26V, packaged in a 6-pin SC-70 DCK package. The device is designed to amplify the small differential voltage produced across a current-sense shunt and convert it into a ground-referenced analog voltage for measurement and control. A current-sense amplifier, also called a current-shunt monitor, is a specialized instrumentation amplifier that measures current indirectly from the voltage drop across a precision shunt resistor. INA213-Q1 belongs to the voltage-output current-shunt-monitor family within instrumentation amplifiers and power-measurement ICs. Its bidirectional measurement supports both positive and negative current flow, making it suitable for motor, battery, automotive, and industrial power-control systems. Verified manufacturer and distributor data identify the INA213BQDCKRQ1 as a 26V, AEC-Q100, high-precision current-sense amplifier. The device supports low-side or high-side measurement, and the official part page identifies the DCK package as a 6-pin SOT-SC70 package. The automotive-grade ordering suffix is consistent with the AEC-Q100 qualification stated by Texas Instruments. The INA21x-Q1 family is intended for applications requiring accurate current measurement across a shunt while the sensed node may sit at a substantially different voltage from the measurement ground. This allows current monitoring in batteries, motor-control systems, electronic loads, power supplies, and automotive electrical systems without placing the shunt at ground potential. The output voltage must remain within the device's valid operating and output limits, so the system designer should verify supply, common-mode, shunt, and output-headroom constraints from the manufacturer datasheet. Typical uses include bidirectional battery-current measurement, DC motor current sensing, solenoid and actuator monitoring, power-supply load current reporting, industrial control input sensing, and automotive load diagnostics. Because the part is bidirectional, it can report charge and discharge current with one signal path rather than requiring separate positive and negative measurement channels. The primary design consideration is the relationship between shunt resistance, sensed current, amplifier gain, input range, and output swing. A higher shunt resistance produces a larger differential signal and can improve measurement resolution, but it also increases power dissipation in the shunt. The PCB should keep the high-current shunt path separate from sensitive input traces, use a low-error reference resistor network, and provide stable supply bypassing close to the device. This page combines verified source data with engineering guidance while clearly identifying parameters that require confirmation from the manufacturer datasheet.