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INA2134PA - Dual 0dB Audio Differential Receiver | Texas Instruments
INA2134PA

INA2134PA - Dual 0dB Audio Differential Receiver | Texas Instruments

The Texas Instruments INA2134PA is a dual audio differential line receiver with a fixed gain of 1 V/V, low distortion of 0.0005% at 1 kHz, and a 14 V/µs slew rate. The device is supplied in a 14-pin PDIP package for through-hole audio and instrumentation designs. Each channel uses high-performance operational amplifiers with on-chip precision resistors to convert balanced differential inputs into single-ended audio signals. An audio differential line receiver is a specialized amplifier stage that rejects common-mode noise present on balanced signal pairs while preserving the wanted differential audio voltage. Its place in the signal-chain hierarchy is differential receiver → balanced audio input amplifier → analog signal-conditioning front end. This makes the INA2134PA particularly useful when a stereo source uses balanced left and right channels but the downstream circuitry requires ground-referenced, single-ended audio signals. Key performance characteristics include a fixed 0 dB voltage gain, 90 dB minimum CMRR, 2.9 mA maximum quiescent current, and operation from -18 V to +18 V. According to the TI INA134 and INA2134 datasheet, the receiver combines low distortion with fast settling and wide output-voltage swing. The 14 V/µs slew rate supports accurate reproduction of high-level, high-frequency transients rather than clipping them under moderate loading. The INA2134PA contains two independent receiver channels and internal precision gain-setting resistors. On-chip resistors reduce component count and help maintain consistent channel-to-channel gain without requiring external matched networks. Its differential architecture is useful for rejecting ground-potential differences and coupled interference present between a source and the receiving equipment, especially in professional audio, instrumentation, and industrial control systems. Typical uses include stereo balanced-to-unbalanced conversion, audio measurement front ends, line-level signal conditioning, and instrumentation amplifiers. Because the gain is fixed at 1 V/V, downstream stages must provide any required attenuation or additional amplification. The device is also appropriate for prototypes, repairs, and legacy equipment where a standard 14-pin PDIP footprint and through-hole assembly are preferred over a surface-mount package. When laying out the receiver, connect the balanced input conductors to their assigned differential inputs and route the outputs to the following analog stage with short traces and a stable ground reference. Decouple each supply rail close to the device, keep input and output nodes away from switching-current paths, and verify the output swing against the selected load. This page also organizes package, electrical, and replacement information for faster component selection.

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INA2134UA - 0dB Audio Differential Receiver | Texas Instruments
INA2134UA

INA2134UA - 0dB Audio Differential Receiver | Texas Instruments

The Texas Instruments INA2134UA is a dual-channel audio differential line receiver with a fixed 1 V/V gain, low distortion, and high slew rate, housed in a 14-pin SOIC package. The receiver is designed for professional audio and other balanced-signal applications where common-mode rejection and signal integrity are important. A differential receiver is an analog signal-conditioning circuit that accepts a pair of complementary or balanced inputs and produces a single output proportional to their difference. The INA2134 family uses high-performance operational amplifiers with on-chip precision resistors. This integrated approach simplifies balanced audio input design and reduces the need for external matched resistor networks. Its differential architecture is part of the broader special-purpose amplifier and signal-conditioning IC hierarchy. The INA2134UA provides 0.0005% distortion at 1 kHz, a 14 V/µs slew rate, and a fixed gain of 1 V/V. The manufacturer specifies a wide supply range of ±18 V and low quiescent current of 2.9 mA maximum. Its high common-mode rejection helps reject shared noise and interference on balanced audio lines, while fast settling and slew-rate performance support dynamic audio signals. The device is offered in single and dual versions, with INA2134UA providing two receiver channels. The 14-pin SOIC package provides a practical surface-mount option for balanced audio preamplifiers, mixer stages, instrument interfaces, and other low-frequency analog systems. The INA2134UA is also specified for operation from -40°C to +85°C, covering the extended industrial temperature range. When using the INA2134UA, preserve the balanced signal path and connect the appropriate input and output decoupling capacitors close to the device pins. Verify source impedance, output loading, cable termination, and common-mode voltage before finalizing the analog layout. Proper grounding and symmetrical routing are important for maximizing common-mode rejection and minimizing distortion. This product page combines the manufacturer specifications, sourcing guidance, drop-in alternatives, application fit, and practical PCB considerations to support faster component selection and design review. It is intended to help engineers identify the correct package, compare suitable alternatives, and implement a stable balanced-audio front end without treating the receiver as a general-purpose precision amplifier.

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INA2137UA - Dual ±6dB Audio Receiver | Texas Instruments
INA2137UA

INA2137UA - Dual ±6dB Audio Receiver | Texas Instruments

The Texas Instruments INA2137UA is a dual audio differential line receiver with selectable fixed gains of +6 dB and -6 dB, a 14-pin SOIC package, and operation from dual ±18 V supplies. It combines high-performance operational amplifiers with on-chip precision resistors to recover balanced audio signals and reject common-mode interference. An audio differential line receiver is a specialized analog interface that converts a balanced, differential input into a single-ended audio signal. Its functional position is input conditioning: line receiver, differential receiver, analog signal conditioner, and interface IC. Differential reception is particularly useful when two conductors carry the same signal in opposite polarity, allowing common-mode noise to be rejected before the signal reaches an audio-processing or amplification stage. Key features include low distortion of 0.0005% at 1 kHz, a slew rate of 14 V/µs, a fast settling time of 0.01%, and high common-mode rejection of 90 dB. The maximum quiescent current is 2.9 mA, while the wide ±18 V supply range supports conventional professional and consumer audio rails. Each receiver can provide a fixed gain of 1/2 or 2, corresponding to -6 dB or +6 dB. The internal precision-resistor network provides repeatable gain without requiring external gain-setting resistors. This simplifies board design and reduces tolerance-related gain errors. High slew rate preserves large-signal dynamic range in music and speech paths, while low distortion minimizes added harmonic content. The 90 dB CMRR specification helps attenuate hum and interference picked up equally by both input conductors. Typical applications include balanced professional-audio inputs, consumer audio equipment, active speaker systems, audio mixers, and instrumentation interfaces. The dual-channel configuration accommodates left and right channels in one package. The 14-pin SOIC also offers a practical standard footprint for through-hole assembly and conventional surface-mount production. When designing a board around the INA2137UA, preserve the balanced input topology and keep input and return paths appropriately routed. Check output swing, input common-mode range, and gain configuration against the intended signal amplitude. Decoupling capacitors should be placed close to the supply pins, while unused inputs require appropriate treatment according to the manufacturer pin-description table. This product overview combines the device's audio-performance figures, package information, pin and footprint considerations, replacement guidance, and application-level design guidance to support faster component evaluation and board-level implementation.

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INA213BQDCKRQ1 - 26V Bidirectional Current-Sense IC | TI
INA213BQDCKRQ1

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.

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INA2141P - Dual G=10/100 Instrumentation Amplifier | Texas Instruments
INA2141P

INA2141P - Dual G=10/100 Instrumentation Amplifier | Texas Instruments

The Texas Instruments INA2141P is a dual, low-power instrumentation amplifier offering selectable gains of 10 and 100 in a 16-pin plastic DIP package. Each amplifier combines low offset voltage, low drift, high common-mode rejection, current-feedback input circuitry, and wide bandwidth for precision analog signal conditioning. The INA2141P is designed for applications that require accurate amplification of differential signals in the presence of substantial common-mode voltage. An instrumentation amplifier is a specialized analog amplifier optimized for measuring low-level differential signals, such as sensor outputs, while rejecting common-mode noise and voltage. Unlike a general-purpose operational amplifier, an instrumentation amplifier provides high input impedance, consistent gain accuracy, and strong common-mode rejection in a single integrated circuit. The INA2141 family is a dual instrumentation amplifier, so one package can process two independent channels. The INA2141P supports two fixed gain settings, 10 and 100, and uses current-feedback input circuitry to maintain bandwidth at higher gain. The manufacturer datasheet states that bandwidth reaches 200 kHz at a gain of 100. Low offset voltage is specified at 50 µV maximum, with maximum drift of 0.5 µV/°C and gain accuracy of ±0.05%. Common-mode rejection reaches 117 dB minimum at a gain of 100. The device accepts supply voltages as low as ±2.25 V and operates with supplies up to ±18 V. Input protection extends to ±40 V, helping the amplifier withstand overload conditions in sensor interfaces and industrial measurement systems. Quiescent current is approximately 750 µA per amplifier, making the device suitable for low-power and battery-operated instrumentation. Typical uses include bridge-sensor and pressure-transducer interfaces, medical monitoring, industrial process measurement, current-loop sensing, and laboratory instrumentation. Because the INA2141P is a dual amplifier, it is especially useful for paired sensors or two-stage measurement systems where board area and power consumption are important. Designers should verify the gain-setting resistor configuration, reference-voltage implementation, input common-mode range, and supply headroom against the datasheet before layout. Decoupling capacitors should be placed close to the supply pins, and the analog input traces should be routed away from switching nodes. The manufacturer datasheet also provides application guidance for gain selection, bandwidth, and input protection. This page combines the verified manufacturer and distributor information for INA2141P with package-level guidance, application context, and design considerations that help engineers evaluate the device alongside alternative instrumentation-amplifier implementations.

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INA2141U - Dual 100V/µs Instrumentation Amplifier | Texas Instruments
INA2141U

INA2141U - Dual 100V/µs Instrumentation Amplifier | Texas Instruments

The Texas Instruments INA2141U is a dual-channel, low-power instrumentation amplifier with selectable gains of 10 and 100, 4 V/µs slew rate, and 1 MHz gain-bandwidth product, housed in a 16-pin SOIC (DW) package. Each channel offers a maximum input offset voltage of 50 µV, maximum offset drift of 0.5 µV/°C, and typical gain accuracy of ±0.05%. The devices support bipolar supplies up to ±18 V and include input protection to ±40 V. An instrumentation amplifier is a precision analog signal-conditioning IC that amplifies the differential voltage between two inputs while rejecting common-mode interference. Its internal architecture provides high input impedance, accurate resistor-based gain, and strong common-mode rejection. In the electronic-component hierarchy, the INA2141U is a dual instrumentation amplifier within the broader amplifier IC and signal-conditioning categories. Key features include a low maximum input bias current of 5 nA and a minimum common-mode rejection ratio of 117 dB. These characteristics suit sensor interfaces where source impedance, thermocouple voltages, and small bridge signals must be measured accurately. The low-power design also supports battery-powered instrumentation and compact test equipment where amplifier efficiency and low bias current influence overall system error. The internal gain architecture offers a choice of 10 or 100 to match both moderate and high-sensitivity measurement ranges. A 1 MHz gain-bandwidth product supports signal bandwidth required by many industrial, medical, and laboratory systems, while the 4 V/µs slew rate improves large-signal response. Maximum input offset voltage of 50 µV and drift of 0.5 µV/°C limit errors in low-level DC measurements. Typical uses include bridge excitation and readout, pressure and strain-gauge amplification, biopotential front ends, battery-powered sensor modules, current-shunt measurements, and precision data-acquisition systems. The 16-pin SOIC package allows conventional surface-mount assembly, while the dual-channel configuration can reduce board area when two differential inputs must be conditioned. Designers should use the manufacturer pin-description table to assign input, feedback, reference, power, and output connections. Input filtering, reference-grounding, and supply-bypass placement require care because parasitic resistance can degrade CMRR and offset performance. Input protection ratings should not be interpreted as a substitute for external surge protection in hazardous or high-energy systems. This page consolidates the key INA2141U specifications, verified package information, application guidance, and confirmed replacement references into a practical engineering comparison. It also distinguishes direct pin-compatible options from related INA214x devices whose gain and channel characteristics differ.

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INA2143U - 5-V/µs Dual Precision Difference Amplifier | TI
INA2143U

INA2143U - 5-V/µs Dual Precision Difference Amplifier | TI

The Texas Instruments INA2143U is a dual high-speed precision difference amplifier featuring 5 V/µs slew rate, 250 µV offset, selectable gain settings of 10 or 0.1, and a 14-pin SOIC package. The device is intended for systems that measure small voltage differences and require amplified differential outputs. A difference amplifier is a specialized operational-amplifier circuit that compares voltages applied to its inverting and non-inverting inputs and amplifies the voltage between them. This method helps reject signals that appear equally on both inputs, making difference amplifiers useful within measurement, instrumentation, analog-control, and signal-conditioning systems. The INA2143U belongs to the amplifier IC category and combines two precision difference amplifiers in one package. Key features include a 5 V/µs slew rate, 250 µV offset, gain options of 10 and 0.1, dual-channel operation, and an operating temperature range of -55°C to 125°C. The 5 V/µs slew rate allows the output to respond quickly to input-voltage changes, while the selectable gain provides flexibility for different differential-signal levels. Each channel can support the two stated gain configurations. The INA2143U combines two difference amplifiers in a single 14-pin SOIC (D) package, reducing board area when two differential channels are required. Its high-speed and precision positioning makes it applicable to fast analog signal conditioning, where the main design objective is to preserve the relationship between two input voltages while converting the differential signal into a single-ended output. Typical applications include current-sense amplifier front ends, differential sensor interfaces, bridge-based measurement circuits, industrial instrumentation, and analog control systems. In a current-sense design, the amplifier processes the voltage generated across a sense resistor rather than the full supply voltage. In a bridge or differential sensor interface, it rejects common-mode voltage and preserves the smaller differential component being measured. Designers should use the manufacturer pin-description table when assigning traces and power connections, and they should verify signal amplitudes against the selected gain of 10 or 0.1. PCB placement should minimize resistive and capacitive pickup around the differential inputs, while supply bypassing should follow the connection and capacitor recommendations in the manufacturer datasheet. This page combines the confirmed INA2143U operating characteristics with practical selection guidance, application context, package information, and drop-in replacement validation. It distinguishes confirmed device attributes from parameters that require confirmation from the complete manufacturer datasheet, helping engineers plan sourcing and circuit design with fewer assumption-driven steps.

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INA217AIP - Low-Noise Instrumentation Amplifier | Texas Instruments
INA217AIP

INA217AIP - Low-Noise Instrumentation Amplifier | Texas Instruments

The Texas Instruments INA217AIP is a low-noise, low-distortion monolithic instrumentation amplifier in an 8-pin PDIP package. It accepts a 4.5 V to 18 V supply, provides a typical gain of 3 V/V, features 250 µV input offset voltage, and supports a slew rate of 15 V/µs with 3.4 MHz bandwidth. An instrumentation amplifier is a specialized amplifier optimized for measuring low-level differential signals. Its internal signal path rejects common-mode noise while amplifying the voltage difference between two inputs. The INA217 belongs to the instrumentation amplifier, differential amplifier, analog amplifier, and signal-conditioning IC hierarchy, making it suitable for precision sensor conditioning, balanced audio, industrial measurement, and medical instrumentation. The device uses current-feedback circuitry to provide wide bandwidth and strong dynamic response over a broad gain range. Its distortion-cancellation architecture is intended to maintain low distortion even at higher gain. The manufacturer identifies near-theoretical noise performance for a 200 Ω source impedance, making balanced low-impedance microphone signals a primary use case. The monolithic implementation also provides differential inputs, low noise, and low distortion in one package. INA217AIP is identified as a replacement for the SSM2017 and is available with the same DIP-8 and wide-body SOL-16 pin arrangements. The DIP-8 format is useful when an existing instrument-amplifier layout must be retained. Its 15 V/µs slew rate supports high-level audio stages, while differential input handling improves rejection of common-mode interference in measurement systems. Typical applications include professional microphone preamplification, low-level bridge or transducer signal conditioning, industrial process measurement, and medical monitoring. In a microphone circuit, the part processes the differential output of a balanced capsule while rejecting much of the shared noise appearing on both signal conductors. Its low-noise, low-distortion characteristics help preserve the signal-to-noise ratio of the source. When designing around INA217AIP, preserve the pin arrangement of the original SSM2017 layout and follow the manufacturer datasheet for gain-setting resistors, supply bypass capacitors, and output drive requirements. Check input common-mode range, output swing, and source impedance at the selected gain because instrumentation amplifiers can become input-voltage-range constrained even when their bandwidth remains adequate. This product page combines the manufacturer electrical description, package information, compatible-device context, and application-level engineering guidance. It also distinguishes direct replacements from alternatives that require different packages, helping designers evaluate PCB reuse, signal bandwidth, and noise performance before committing to a component.

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INA2181 26V Dual-Channel Current Sense Amp | TI | Gain 20 V/V
INA2181A1IDGSR

INA2181 26V Dual-Channel Current Sense Amp | TI | Gain 20 V/V

The Texas Instruments INA2181 (e.g., INA2181A1IDGSR) is a 26V, dual-channel, bidirectional, 350kHz voltage-output current sense amplifier in a 10-pin VSSOP (DGS) package, part of the cost-optimized INAx181 family. It senses voltage drops across shunt resistors on low- or high-side rails and outputs a ground-referenced analog voltage proportional to load current. A current sense amplifier (also called a current-shunt monitor) is a specialized difference amplifier that extracts a small differential shunt voltage riding on a large common-mode voltage and converts it to a ground-referenced single-ended signal. Within the signal chain hierarchy it sits between the shunt resistor and an ADC or comparator, serving as a front-end element of power management and battery monitoring systems. Key features include a wide 2.7V to 26V common-mode range that is independent of the 2.7V to 5.5V supply, 350kHz bandwidth for fast load-transient monitoring, bidirectional operation with a reference pin for charging/discharging current measurement, and factory-calibrated gain options (A1 = 20 V/V, A2 = 50 V/V, A3 = 100 V/V, A4 = 500 V/V) that eliminate gain-setting resistors. The zero-drift architecture delivers low offset for small shunt voltages. The dual channels share one package, halving board area versus two single-channel monitors such as the INA181. Rail-to-rail output swings close to the supply rails, maximizing ADC dynamic range. All device options are specified from -40C to +125C. Typical applications include battery current monitoring in portable and industrial equipment, DC motor drive phase and bus current sensing, telecom and server power supply current telemetry, and load-current supervision in 12V/24V rails feeding TI C2000 or MSPM0 MCUs. Design tip: keep the shunt voltage in the 10 mV to 100 mV range at full load - large enough to swamp offset error, small enough to limit shunt power dissipation. Route Kelvin sense traces directly to the shunt pads to preserve accuracy.

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INA2181A3IDGSR - 26V Dual-Channel Current Sense Amp | TI
INA2181A3IDGSR

INA2181A3IDGSR - 26V Dual-Channel Current Sense Amp | TI

The Texas Instruments INA2181A3IDGSR is a 26V, dual-channel, bidirectional voltage-output current sense amplifier with a fixed gain of 100 V/V (A3 version), 350 kHz bandwidth, and a common-mode input range of -0.2 V to +26 V, housed in a 10-pin VSSOP (DGS) package rated from -40C to +125C. A current sense amplifier (also called a current-shunt monitor) is a specialized difference amplifier that senses the small voltage drop across a shunt resistor and converts it into a ground-referenced output signal. Within the power-management IC hierarchy, it sits alongside voltage regulators and battery-management devices as a core building block of power monitoring and protection subsystems. Key features include the wide -0.2 V to +26 V common-mode range that operates independently of the supply voltage, enabling high-side and low-side sensing on 24 V industrial rails. The A3 gain option of 100 V/V with a 2 V/us output slew rate and 350 kHz bandwidth suits fast, medium-sensitivity current monitoring. Offset voltage is tightly specified: a maximum of plus/minus 150 uV at VCM = 0 V and plus/minus 500 uV at VCM = 12 V, according to the TI datasheet. The INAx181 architecture senses bidirectional current with an external reference voltage applied to the REF pin, allowing the output to be offset for positive and negative current indication. Rail-to-rail output swing maximizes ADC dynamic range on low-supply rails, and the cost-optimized design targets volume production. Typical applications include battery charging systems, 24 V industrial power supplies, motor drive DC bus monitoring, and telecom or server power-supply current telemetry where two channels share one shunt scheme or monitor two rails. Design consideration: keep the shunt resistor value and the A3 gain of 100 V/V balanced - a 10 mV full-scale shunt drop yields 1 V output, so size the shunt to use the ADC input range without exceeding the output swing limits. This page synthesizes distributor pricing, drop-in alternatives within the INAx181 family, and practical design notes not found in the manufacturer datasheet.

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INA2181A4QDGSRQ1 - 26V Dual 350kHz Current Sense Amp AEC-Q100 | TI
INA2181A4QDGSRQ1

INA2181A4QDGSRQ1 - 26V Dual 350kHz Current Sense Amp AEC-Q100 | TI

The Texas Instruments INA2181A4QDGSRQ1 is an AEC-Q100 qualified, 26V, dual-channel, bidirectional current sense amplifier (also called a current-shunt monitor) with a 350 kHz bandwidth and a fixed gain of 200 V/V (A4 gain variant), housed in a 10-pin VSSOP (DGS) package. It senses voltage drops across current-sense resistors at common-mode voltages from -0.2 V to +26 V, independent of its own supply voltage, and provides a rail-to-rail voltage output. A current sense amplifier is a specialized difference amplifier, within the broader hierarchy of instrumentation amplifiers and operational amplifier signal-conditioning ICs, designed to measure the small differential voltage developed across a shunt resistor and convert it into a ground-referenced output voltage proportional to load current. Bidirectional devices like the INA2181 also detect current flowing in both directions, which is essential in battery charging and discharging monitoring. Key features of the INA2181A4QDGSRQ1 include the wide -0.2 V to 26 V common-mode range that survives automotive load-dump-adjacent conditions, dual-channel integration that halves board area versus two single-channel amplifiers, a 350 kHz bandwidth suitable for fast current-loop control, and the cost-optimized INAx181-Q1 family architecture. Technically, the INA2181-Q1 uses a zero-drift-free precision front end with a fixed gain set by internal resistors; the A4 variant provides 200 V/V gain, allowing very small shunt resistances (sub-10 mOhm) to be used, reducing shunt power dissipation at high currents. The voltage output architecture requires no ADC-side gain stage and simplifies interfacing with microcontroller ADC inputs. Typical applications include automotive battery management systems, 48V and 12V automotive power rails, industrial motor drives, telecom -48V systems, and server hot-swap current monitoring. Design-wise, place the shunt resistor close to the amplifier inputs, use Kelvin (4-wire) connections to the sense resistor, and filter differential noise at the inputs. Note that the 200 V/V gain limits full-scale shunt voltage to about 20 mV for a 4 V output swing. This page synthesizes distributor pricing, drop-in same-family gain-variant alternatives, and practical design notes not found in the manufacturer datasheet.

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INA240A1D - 20V/V Bidirectional Current Sense Amp | TI
INA240A1D

INA240A1D - 20V/V Bidirectional Current Sense Amp | TI

The Texas Instruments INA240A1D is a bidirectional, zero-drift current-sense amplifier with a gain of 20 V/V, a common-mode voltage range of -4 V to 80 V, and an 8-pin SOIC package. It measures the voltage developed across a shunt resistor on either the high side or low side of a power path and produces an analog output proportional to current. A current-sense amplifier is a specialized instrumentation amplifier that converts the small differential voltage across a current shunt into a larger, easier-to-process voltage. The INA240 family belongs to the amplifier hierarchy as a current-sense amplifier, instrumentation amplifier, analog IC, and semiconductor. Its common-mode range allows the shunt to remain near a supply rail while high voltage, high current, or both are present in the monitored circuit. The INA240A1D combines a 20 V/V gain setting with bidirectional operation and enhanced PWM rejection. Zero-drift architecture minimizes output drift as temperature changes, while the -4 V to 80 V common-mode range supports demanding industrial power systems. Its analog output can be centered near ground for bidirectional current measurement by applying the appropriate reference configuration. The device also supports unidirectional sensing when both reference pins are tied to ground. Internally, the device provides precision differential sensing, a low-offset amplifier, and an analog output stage. Because the common-mode input range is independent of the supply voltage in the relevant operating region, the INA240 can sense voltage drops across a high-side shunt without requiring the amplifier supply to exceed the sensed bus voltage. This architecture is particularly useful when PWM switching nodes create large common-mode transients. Typical applications include motor-control systems, industrial power supplies, robotics, solar inverters, battery packs, solenoid drivers, LED drivers, and protected DC power rails. The INA240A1D is especially appropriate when current must be measured bidirectionally, the shunt may sit above ground, and PWM rejection is important. A 20 V/V gain also reduces the required shunt resistance when the measured current range is relatively low. When designing the circuit, verify that the shunt power dissipation remains below its rating and that the amplifier output stays within its valid output range at maximum load current. Place the differential input traces directly across the shunt, keep them short and symmetric, and provide stable supply decoupling close to the device. Do not exceed the absolute maximum ratings for supply voltage, common-mode voltage, or input voltage. This page combines manufacturer specifications, drop-in alternatives, application guidance, and practical design notes for engineers evaluating the INA240A1D in motor, industrial, and high-side current-measurement systems.

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INA240A1PW - 80V Bidirectional Current Sense Amp | TI TSSOP-8 (Tape & Reel)
INA240A1PW

INA240A1PW - 80V Bidirectional Current Sense Amp | TI TSSOP-8 (Tape & Reel)

The Texas Instruments INA240A1PW is a -4 V to 80 V bidirectional, ultra-precise current-sense amplifier with enhanced PWM rejection, housed in an 8-pin TSSOP (PW) package with a fixed gain of 20 V/V. It senses drops across shunt resistors over a wide common-mode range independent of supply voltage and integrates a zero-drift chopper architecture that keeps input offset below 25 uV and offset drift below 100 nV/°C. What is a current-sense amplifier? A current-sense amplifier is a specialized analog IC that measures the small differential voltage developed across a shunt resistor carrying the load current, then amplifies that millivolt-level signal to a ground-referenced output that an ADC, microcontroller, or comparator can read. As a member of the power-management and amplifier IC hierarchy, the INA240 family combines a precision difference amplifier with PWM-rejection circuitry, allowing it to ignore large dV/dt transients from switching power stages while still maintaining high DC accuracy. Key features include 20 V/V gain (A1 variant), 132 dB DC common-mode rejection ratio (CMRR), a 1.5 MHz bandwidth, and 1.6 mA maximum quiescent supply current from a 2.7 V to 5.5 V supply rail. Enhanced PWM rejection suppresses transients from 60 V/ns common-mode slew events that occur when measuring current in motor-drive and solenoid circuits, allowing accurate readings through PWM edges without blanking. The INA240 architecture pairs an input EMI filter and chopper-stabilized front end with a precision output stage. The chopper stabilization shifts the 1/f noise to a higher frequency where it is filtered out, yielding the 5 uV/°C typical offset drift and 25 uV maximum input offset specified across the -40°C to +125°C operating range. Independent supply and common-mode ranges allow the IC to operate from a 3.3 V logic rail while sensing high-side current at 24 V, 36 V, or 48 V industrial bus voltages. Typical applications include 48 V brushed and brushless DC motor control, solenoid and valve current monitoring, server and telecom 12 V/24 V hot-swap current sensing, power-converter feedback, and battery-pack current monitoring in e-mobility and industrial robots. The A1 gain of 20 V/V suits low-side and high-side sensing where shunt full-scale drop is on the order of 75 mV. When designing with this device, choose the shunt resistor so that peak differential voltage at maximum load stays within the linear output range (typically 0.1 V to VS - 0.1 V), and place a 1 nF to 10 nF RC network on the input pins if the layout introduces parasitic common-mode noise. Use Kelvin (4-terminal) connection to the shunt to keep ground-loop errors out of the measurement. This page synthesizes real-time distributor pricing, drop-in alternatives, and design notes that go beyond the manufacturer datasheet, giving engineers a one-stop reference for the INA240A1PW.

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INA240A1PWR - 80V Bidirectional Current Sense Amp | TI TSSOP-8
INA240A1PWR

INA240A1PWR - 80V Bidirectional Current Sense Amp | TI TSSOP-8

The Texas Instruments INA240A1PWR is a -4 V to 80 V bidirectional, ultra-precise current-sense amplifier with enhanced PWM rejection, housed in an 8-pin TSSOP (PW) package with a fixed gain of 20 V/V. It senses drops across shunt resistors over a wide common-mode range independent of supply voltage and integrates a zero-drift chopper architecture that keeps input offset below 25 uV and offset drift below 100 nV/°C. What is a current-sense amplifier? A current-sense amplifier is a specialized analog IC that measures the small differential voltage developed across a shunt resistor carrying the load current, then amplifies that millivolt-level signal to a ground-referenced output that an ADC, microcontroller, or comparator can read. As a member of the power-management and amplifier IC hierarchy, the INA240 family combines a precision difference amplifier with PWM-rejection circuitry, allowing it to ignore large dV/dt transients from switching power stages while still maintaining high DC accuracy. Key features include 20 V/V gain (A1 variant), 132 dB DC common-mode rejection ratio (CMRR), a 1.5 MHz bandwidth, and 1.6 mA maximum quiescent supply current from a 2.7 V to 5.5 V supply rail. Enhanced PWM rejection suppresses transients from 60 V/ns common-mode slew events that occur when measuring current in motor-drive and solenoid circuits, allowing accurate readings through PWM edges without blanking. The INA240 architecture pairs an input EMI filter and chopper-stabilized front end with a precision output stage. The chopper stabilization shifts the 1/f noise to a higher frequency where it is filtered out, yielding the 5 uV/°C typical offset drift and 25 uV maximum input offset specified across the -40°C to +125°C operating range. Independent supply and common-mode ranges allow the IC to operate from a 3.3 V logic rail while sensing high-side current at 24 V, 36 V, or 48 V industrial bus voltages. Typical applications include 48 V brushed and brushless DC motor control, solenoid and valve current monitoring, server and telecom 12 V/24 V hot-swap current sensing, power-converter feedback, and battery-pack current monitoring in e-mobility and industrial robots. The A1 gain of 20 V/V suits low-side and high-side sensing where shunt full-scale drop is on the order of 75 mV. When designing with this device, choose the shunt resistor so that peak differential voltage at maximum load stays within the linear output range (typically 0.1 V to VS - 0.1 V), and place a 1 nF to 10 nF RC network on the input pins if the layout introduces parasitic common-mode noise. Use Kelvin (4-terminal) connection to the shunt to keep ground-loop errors out of the measurement. This page synthesizes real-time distributor pricing, drop-in alternatives, and design notes that go beyond the manufacturer datasheet, giving engineers a one-stop reference for the INA240A1PWR.

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INA240A3D - 80V Current Sense Amplifier | Texas Instruments
INA240A3D

INA240A3D - 80V Current Sense Amplifier | Texas Instruments

The Texas Instruments INA240A3D is a bidirectional, ultra-precise voltage-output current-sense amplifier with an operating common-mode range of -4 V to 80 V, enhanced PWM rejection, and an 8-pin SOIC package. It is designed to measure the voltage developed across a shunt resistor in high-side or low-side current-sensing circuits while supporting common-mode voltages above the device supply voltage. A current-sense amplifier is a specialized amplifier within the instrumentation-amplifier and signal-conditioning hierarchy. It converts the small differential voltage produced by a shunt resistor into a proportional analog voltage suitable for measurement by an ADC, MCU, motor controller, or protection circuit. The INA240 family is classified as an analog signal-chain IC and is commonly placed beside a power-conversion stage to create a precision current-feedback signal. The INA240A3D combines bidirectional measurement, a wide -4 V to 80 V common-mode range, and enhanced PWM rejection. Bidirectional operation allows the output polarity to represent either positive or negative current. The negative common-mode capability is useful when a shunt is observed during a below-ground flyback interval, while the upper range supports current monitoring in systems operating well above the amplifier supply voltage. Its stated operating-temperature range is -40 °C to 125 °C. The device uses a voltage-output architecture with reference and supply connections that support system-level current measurement. Because the amplifier can operate independently of the common-mode voltage being sensed, its performance is maintained in applications where the shunt voltage swings rapidly while the amplifier remains powered from a low-voltage rail. This architecture is particularly useful in motor drives, solenoid controls, power converters, and battery-powered systems where a conventional low-voltage current-sense amplifier may leave the measurement range. Typical uses include high-side DC-link monitoring, low-side motor-return measurement, solenoid current diagnostics, power-supply telemetry, and battery charge or discharge current sensing. In these systems, the shunt is placed in the current path and connected to the differential input of the INA240A3D. The resulting analog voltage can be routed to a control ADC or comparator for regulation, fault detection, or data logging. Design the input and reference network carefully because the differential shunt voltage, amplifier supply, output range, and selected shunt resistance jointly determine usable measurement range. Keep the shunt and amplifier connections compact to minimize parasitic pickup, use a Kelvin connection where practical, and route the differential pair away from switching-node copper. The manufacturer's INA240 datasheet should be used for pin assignments, gain, input limits, output behavior, and recommended application values. This page organizes the verified INA240A3D operating limits, package information, sourcing details, replacement constraints, application guidance, and design considerations. It also distinguishes a confirmed same-package automotive alternative from incompatible package or gain variants that cannot be treated as drop-in replacements.

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INA240A3DR - 80V Current Sense Amplifier | Texas Instruments (Tape & Reel)
INA240A3DR

INA240A3DR - 80V Current Sense Amplifier | Texas Instruments (Tape & Reel)

The Texas Instruments INA240A3DR is a bidirectional, ultra-precise voltage-output current-sense amplifier with an operating common-mode range of -4 V to 80 V, enhanced PWM rejection, and an 8-pin SOIC package. It is designed to measure the voltage developed across a shunt resistor in high-side or low-side current-sensing circuits while supporting common-mode voltages above the device supply voltage. A current-sense amplifier is a specialized amplifier within the instrumentation-amplifier and signal-conditioning hierarchy. It converts the small differential voltage produced by a shunt resistor into a proportional analog voltage suitable for measurement by an ADC, MCU, motor controller, or protection circuit. The INA240 family is classified as an analog signal-chain IC and is commonly placed beside a power-conversion stage to create a precision current-feedback signal. The INA240A3DR combines bidirectional measurement, a wide -4 V to 80 V common-mode range, and enhanced PWM rejection. Bidirectional operation allows the output polarity to represent either positive or negative current. The negative common-mode capability is useful when a shunt is observed during a below-ground flyback interval, while the upper range supports current monitoring in systems operating well above the amplifier supply voltage. Its stated operating-temperature range is -40 °C to 125 °C. The device uses a voltage-output architecture with reference and supply connections that support system-level current measurement. Because the amplifier can operate independently of the common-mode voltage being sensed, its performance is maintained in applications where the shunt voltage swings rapidly while the amplifier remains powered from a low-voltage rail. This architecture is particularly useful in motor drives, solenoid controls, power converters, and battery-powered systems where a conventional low-voltage current-sense amplifier may leave the measurement range. Typical uses include high-side DC-link monitoring, low-side motor-return measurement, solenoid current diagnostics, power-supply telemetry, and battery charge or discharge current sensing. In these systems, the shunt is placed in the current path and connected to the differential input of the INA240A3DR. The resulting analog voltage can be routed to a control ADC or comparator for regulation, fault detection, or data logging. Design the input and reference network carefully because the differential shunt voltage, amplifier supply, output range, and selected shunt resistance jointly determine usable measurement range. Keep the shunt and amplifier connections compact to minimize parasitic pickup, use a Kelvin connection where practical, and route the differential pair away from switching-node copper. The manufacturer's INA240 datasheet should be used for pin assignments, gain, input limits, output behavior, and recommended application values. This page organizes the verified INA240A3DR operating limits, package information, sourcing details, replacement constraints, application guidance, and design considerations. It also distinguishes a confirmed same-package automotive alternative from incompatible package or gain variants that cannot be treated as drop-in replacements.

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INA293B1QDBVRQ1 - 110V, 1.3MHz Current Sense Amp | TI
INA293B1QDBVRQ1

INA293B1QDBVRQ1 - 110V, 1.3MHz Current Sense Amp | TI

The Texas Instruments INA293B1QDBVRQ1 is an AEC-Q100 qualified, ultra-precise bidirectional current-sense amplifier that measures voltage drops across shunt resistors over an exceptionally wide common-mode range from -4 V to +110 V. It delivers a 1.3 MHz small-signal bandwidth with a 20 V/V fixed gain (B1 variant) in a 5-pin SOT-23 (DBV) package, making it ideal for high-voltage, high-precision current monitoring in space-constrained automotive and industrial designs. What is a current-sense amplifier? A current-sense amplifier is a specialized analog building block that measures the small differential voltage developed across a shunt resistor placed in series with a load or supply rail, and converts it to a ground-referenced output voltage proportional to load current. Unlike a general-purpose op amp, a current-sense amplifier tolerates large common-mode voltages - often well above its own supply - and rejects the common-mode component, exposing only the shunt drop. The INA293-Q1 sits at the high-precision end of this category, combining low offset, low drift, and the widest common-mode range in TI's portfolio of unidirectional/bidirectional current-sense amplifiers. Key features include a maximum offset voltage of ±30 µV across temperature, ±0.2% gain error, and a quiescent current of approximately 1.5 mA over the -40 °C to +125 °C automotive grade-1 temperature range. The B1 gain variant provides 20 V/V; the B2, B3, B4, and B5 variants in the same family offer 50 V/V, 100 V/V, 200 V/V, and 500 V/V respectively, all sharing the SOT-23-5 footprint. The device operates from a single 2.7 V to 20 V supply and is robust against input transients well beyond its supply rail. Internally, the INA293-Q1 uses a precision chopped-input front end followed by a fixed-gain output stage, achieving CMRR greater than 100 dB at DC and PSRR above 80 dB at 1 kHz. The wide common-mode architecture supports both high-side and low-side sensing topologies, enabling accurate monitoring in 48 V mild-hybrid automotive systems, industrial 24 V/36 V/48 V rails, and telecom -48 V applications without level shifting. Typical applications include 48 V eMobility battery management, BLDC motor phase-current monitoring, server/AI accelerator hot-swap current telemetry, USB Power Delivery contract current sensing, and solar inverter string monitoring. Compared with isolated current transducers, the INA293-Q1 achieves comparable accuracy at a fraction of the BOM cost and PCB area. When designing with this device, place the shunt resistor as close as possible to the input pins and keep the input traces symmetrical to preserve CMRR. A 0.1 µF supply bypass capacitor placed within 5 mm of the V+ pin is recommended for stable operation across the full -4 V to +110 V common-mode range. This page synthesizes distributor pricing, drop-in alternatives from the INA293-Q1 family and competing high-side current-sense amplifiers, and practical design notes that go beyond the manufacturer datasheet.

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INA333AIDGKR - 50uA Zero-Drift INA | Texas Instruments
INA333AIDGKR

INA333AIDGKR - 50uA Zero-Drift INA | Texas Instruments

The Texas Instruments INA333AIDGKR is a low-power, precision, zero-drift instrumentation amplifier with a 1.8 V to 5.5 V supply range, 10 uV typical input offset voltage, 150 kHz bandwidth, and an 8-pin VSSOP (DGK) package. It uses a three-operational-amplifier architecture and one external gain-setting resistor to provide gains from 1 to 1000. An instrumentation amplifier is a differential analog amplifier optimized for measuring small voltage signals superimposed on larger common-mode voltages. Its internal three-op-amp topology provides high input impedance and accurate differential gain, making it more practical than a discrete difference amplifier when source impedances are unequal or signals arrive from sensors. INA333 belongs to the precision amplifier hierarchy: instrumentation amplifier, operational amplifier, analog IC, and semiconductor. The INA333 emphasizes low power, low offset drift, and rail-to-rail output operation. Verified source data identifies a 50 uA typical supply current and a gain equation of G = 1 + 100 kΩ/RG. The 150 kHz bandwidth supports fast sensor signals, while the 10 uV input offset specification improves measurement resolution around the zero-input condition. Its input stage is designed to reject common-mode variation encountered in bridge, current-sense, and portable sensing systems. The zero-drift architecture reduces temperature-related offset movement, helping preserve measurement stability when the sensor signal is small relative to input offset. Rail-to-rail output increases usable output swing on low-voltage supplies, although engineers must still verify input common-mode range, output swing, bandwidth, and input bias behavior across the complete intended voltage and temperature range using the manufacturer datasheet. Typical uses include portable medical monitoring, battery-powered industrial instrumentation, pressure and load-cell signal conditioning, low-side current measurement, and low-voltage sensor acquisition. The 50 uA power budget is especially useful for wearable and remote systems where every microamp affects battery life. The VSSOP-8 package supports compact layouts, but differential routing and gain-resistor placement remain essential. For best results, connect the gain resistor close to the RG pins, use a low-noise reference supply, maintain symmetric input routing, and follow the datasheet bypass recommendations. Verify common-mode limits at every operating point rather than assuming rail-to-rail input. This page combines verified distributor data, manufacturer specifications, sourcing guidance, and practical design context.

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INA4180AIPWR-Q1 - Quad 26V Current Sense Amp, 20 V/V | TI
INA4180AIPWR-Q1

INA4180AIPWR-Q1 - Quad 26V Current Sense Amp, 20 V/V | TI

The Texas Instruments INA4180AIPWR-Q1 is an automotive-grade, quad-channel voltage-output current-sense amplifier (current-shunt monitor) in a 14-pin TSSOP (PW) package. It senses voltage drops across current-sense resistors at common-mode voltages from -0.2 V to +26 V, independent of the 1.7 V to 5.5 V supply, with a fixed gain of 20 V/V (A1 version) and 350 kHz bandwidth. A current-sense amplifier is a specialized difference amplifier that measures the small voltage developed across a shunt resistor and converts it into a ground-referenced output signal. Within the power-management IC hierarchy, it sits between the shunt element and an ADC or controller, enabling precise current monitoring for system control and protection in automotive and industrial power rails. Key features include the wide -0.2 V to 26 V common-mode range that survives load-dump and cold-crank conditions without external circuitry, four independent amplifiers in one package that reduce BOM cost and board area in multi-rail designs, rail-to-rail output for maximum ADC dynamic range, and offset voltage as low as [DATA_NEEDED: Vos]. The extended -40C to +125C operating range and AEC-Q100 qualification make it suitable for under-hood and body electronics applications. Architecturally, the INAx180 family integrates a precision matched resistor network that sets the gain (A1 = 20 V/V, A2 = 50 V/V, A3 = 100 V/V, A4 = 200 V/V), eliminating external gain-setting resistors and their matching errors. The zero-crossover-compatible input stage supports sensing on the low side or high side of the rail, and the output is referenced to ground regardless of common-mode voltage. Typical applications include automotive battery current monitoring, 48V and 12V board-net supervision, electric power steering motor current feedback, DC-DC converter current loops, and industrial PLC analog input modules. Cost-optimized designs benefit from the quad-channel integration. Design tip: choose the shunt resistor so the full-scale drop is 10-50 mV to balance accuracy against power dissipation, and use Kelvin (4-wire) connections to the shunt for best precision. Pricing shown as of 2026-08-29.

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INA597IDGKT - Precision 2MHz Difference Amplifier | TI
INA597IDGKT

INA597IDGKT - Precision 2MHz Difference Amplifier | TI

The INA597IDGKT is a high-precision, wide-bandwidth difference amplifier from Texas Instruments, designed for cost-sensitive applications requiring accurate differential signal measurement. It integrates a precision operational amplifier with a matched resistor network, achieving a maximum offset voltage of 200 µV and an offset drift of 5 µV/°C. The device operates from a single supply of 4.5 V to 36 V or dual supplies of ±2.25 V to ±18 V, with a bandwidth of 2 MHz and a common-mode rejection ratio (CMRR) of 88 dB. Housed in an 8-pin VSSOP (DGK) package, the INA597IDGKT is suitable for space-constrained designs. A difference amplifier is a type of operational amplifier circuit that amplifies the voltage difference between two inputs while rejecting common-mode voltages. It is a fundamental building block in analog signal processing, often used in current sensing, bridge amplification, and precision measurement systems. The INA597 belongs to the broader category of instrumentation amplifiers, which are specialized for accurate differential signal acquisition in noisy environments. Key features of the INA597IDGKT include its low offset voltage and drift, which ensure accurate measurement over temperature, and its high CMRR of 88 dB, which rejects common-mode noise. The device also offers rail-to-rail output, allowing maximum dynamic range in single-supply applications. Its low power consumption makes it ideal for battery-powered and portable instrumentation. The INA597 uses TI's e-trim™ technology, which provides precision trimming of the internal resistor network to achieve excellent gain accuracy and temperature stability. The integrated resistors are laser-trimmed to maintain tight matching, ensuring consistent performance across the operating temperature range. The device is fully specified for operation from -40°C to +125°C, making it suitable for industrial and automotive environments. Typical applications include motor current sensing, battery management systems, and precision data acquisition. In motor control, the INA597IDGKT can measure the voltage across a shunt resistor to monitor current, providing feedback for closed-loop control. In battery management, it can sense charge/discharge currents with high accuracy. The device's wide supply range and rail-to-rail output also make it suitable for industrial process control and test equipment. When designing with the INA597IDGKT, ensure that the input common-mode voltage remains within the specified range to maintain linearity. The reference pin (REF) allows level shifting of the output, which is useful in single-supply applications where the output must be centered at a specific voltage. Proper PCB layout with short traces and adequate bypassing will optimize performance.

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INA790A-Q1 - 110V 75ARMS Ultra-Precise Current Sense Amp | TI
INA790A-Q1

INA790A-Q1 - 110V 75ARMS Ultra-Precise Current Sense Amp | TI

The Texas Instruments INA790A-Q1 is an AEC-Q100 qualified, 110V, 75ARMS integrated-shunt ultra-precision current-sense amplifier with enhanced PWM rejection, housed in a 15-VSON (DEK) 6x6 mm package. It combines a calibrated 400 micro-ohm Kelvin-connected shunt resistor with a zero-drift chopped amplifier, delivering +/-35 ppm/degrees C temperature drift and bidirectional current measurement from -4V to +110V common-mode. What is a current-sense amplifier? A current-sense amplifier is an analog IC that measures the voltage across a shunt resistor placed in series with a load and amplifies the small differential voltage into a ground-referenced output proportional to load current. Current-sense amplifiers sit within the signal-chain hierarchy as follows: current-sense amplifier -> instrumentation amplifier -> analog amplifier -> power management analog IC. INA790A-Q1 belongs to the integrated-shunt subfamily, where the shunt resistor and the gain stage are co-packaged, eliminating PCB layout-induced Kelvin errors and parasitic resistance drift that plague discrete solutions. Key features include a -4V to +110V wide common-mode range that survives load-dump and cold-crank transients in 48V automotive rails, 75ARMS continuous current handling, enhanced PWM rejection that suppresses large dv/dt common-mode steps from switching power stages, 1.3 MHz bandwidth for fast transient response, and a low 35 ppm/degrees C maximum temperature drift enabled by the chopper-stabilized architecture. The integrated 400 micro-ohm shunt eliminates external resistor stocking, drift concerns, and board-space overhead. The INA790A-Q1 uses a zero-drift chopper architecture that modulates the input offset voltage to a higher frequency, samples the modulation envelope, and feeds back to cancel the original offset. This technique virtually eliminates the 1/f noise corner and the offset drift that limit conventional current-sense amplifiers in high-precision DC and slow-varying measurements. Typical applications include 48V automotive BLDC motor phase current sensing, server and telecom hot-swap controller current monitors, industrial solenoid and actuator current feedback, solar inverter string current measurement, and battery management system (BMS) pack-current sensing. The AEC-Q100 Grade 1 qualification and PWM rejection make it specifically tailored to inverter and motor-drive environments. When designing with this device, place the INA790A-Q1 in the Kelvin path as close to the load current shunt as possible. Because the shunt is internal, the only PCB layout concern is keeping high-current traces off the analog ground return. Use the REF pin to level-shift the output for bidirectional sensing into an ADC with a ground-referenced input. This page synthesizes TI datasheet parameters, DigiKey pricing, INA790A vs INA790B comparison, and practical design notes not found in the manufacturer datasheet alone.

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INA791B-Q1 - 110V 75A High-Bandwidth Current Sense Amp | Texas Instruments
INA791B-Q1

INA791B-Q1 - 110V 75A High-Bandwidth Current Sense Amp | Texas Instruments

The Texas Instruments INA791B-Q1 is an AEC-Q100-qualified, ultra-precise bidirectional current-sense amplifier with integrated 75A EZShunt technology, supporting a common-mode voltage range of -4V to +110V independent of supply. Housed in a 14-pin DFN (DEK) package measuring approximately 2.5 mm x 3 mm, the B-grade variant offers enhanced precision over the A-grade, including tighter gain error and offset drift specifications optimized for high-accuracy current measurement in automotive and industrial systems. A current-sense amplifier is an analog IC that measures the small differential voltage developed across a shunt resistor carrying a large load current, while rejecting the large common-mode voltage present at the shunt terminals. The category belongs to the instrumentation amplifier family, itself a subclass of operational amplifiers used in measurement and protection subsystems. Current-sense amplifiers sit in the signal chain between the power stage and the MCU/ADC, enabling telemetry, overcurrent protection, and closed-loop control in DC/DC converters, motor drivers, and battery management systems. Key features of the INA791B-Q1 include a wide -4V to +110V common-mode range, high bandwidth for fast transient response, support for 75A RMS continuous current via the integrated EZShunt resistor, and a single 2.7V to 5.5V supply drawing only 3.75 mA maximum quiescent current. The B-grade variant delivers tighter initial accuracy and lower drift than the A-grade, making it well-suited to precision telemetry across the automotive temperature range of -40C to +125C. The architecture combines a precision chopper-stabilized front end with an EZShunt integrated shunt element, eliminating external sense resistors while maintaining high CMRR across the entire common-mode range. The device outputs an analog voltage proportional to load current that can be routed directly to an ADC input for software-based current monitoring, fault detection, and coulomb counting. Typical applications include 48V automotive electrical systems, battery management in HEV/EV powertrains, motor control in body and chassis ECUs, solenoid and actuator monitoring, and industrial high-voltage bus telemetry. The integrated shunt simplifies PCB layout and reduces parasitic inductance that otherwise degrades high-di/dt measurement accuracy. When designing with this part, route the high-current path directly through the integrated EZShunt pins to minimize parasitic resistance, and place a low-ESR decoupling capacitor close to the VS pin. The bidirectional capability means the output polarity indicates current direction, which simplifies charge/discharge monitoring in battery systems.

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INA819IDR - 35µV Offset Low-Power Instrumentation Amp | Texas Instruments
INA819IDR

INA819IDR - 35µV Offset Low-Power Instrumentation Amp | Texas Instruments

The Texas Instruments INA819IDR is a low-power (350 µA), high-precision instrumentation amplifier housed in an 8-pin SOIC (D) package, offering 35 µV maximum offset voltage, 8 nV/√Hz input-referred noise density, and ±60 V overvoltage protection on the gain-setting pins (pins 2 and 3). A single external resistor sets any gain from 1 to 10,000, making it a flexible analog front-end building block. An instrumentation amplifier (INA / in-amp) is a precision differential amplifier that combines high input impedance, accurate fixed gain, and excellent common-mode rejection ratio (CMRR). It is constructed from internal op-amps and a precision resistor network; the user only programs the gain with one external resistor. Within the analog signal-chain hierarchy, instrumentation amplifiers sit above standard op-amps and are the preferred first stage for low-level, high-CMRR sensor readout, before downstream ADCs, SAR drivers, or programmable-gain stages. The INA819 targets precision industrial, medical, and test-and-measurement designs that demand excellent DC accuracy and very low broadband noise. Key specifications include 35 µV maximum input offset voltage, 0.4 µV/°C maximum offset drift, 8 nV/√Hz voltage noise density, 120 dB minimum CMRR (G = 100), 7 MHz bandwidth (G = 100), and 1.6 V/µs slew rate. The super-beta input stage delivers very low input bias current (10 nA maximum) and high input impedance, supporting direct connection to high-impedance bridges and transducers without external buffers. Architecturally, the INA819 combines a super-beta bipolar input front-end with a current-feedback gain stage and laser-trimmed thin-film resistors, achieving <0.4 µV/°C drift and 120 dB CMRR at 1 kHz. It supports single-supply 4.5 V to 36 V or dual-supply ±2.25 V to ±18 V operation, suiting both battery-powered and industrial 24 V bus rails. Typical applications include bridge pressure-strain gauge signal conditioning, weigh scales, ECG/biopotential front ends, industrial process-control analog inputs, and battery-cell monitoring AFE stages. The ±60 V input protection (gain pins only) allows direct connection to industrial sensor lines without external clamping in many cases. When designing with the INA819, choose the gain resistor close to the INA pins to minimize parasitic capacitance and maintain CMRR above 100 dB. For highest DC accuracy, add a low-pass RC filter at the output to attenuate RF rectification before the ADC. This page synthesizes distributor pricing, verified drop-in alternatives, and practical design notes - engineering context not found in the manufacturer datasheet alone.

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INA950-SEP - 80V Ultra-Precise Current-Sense Amp | TI
INA950-SEP

INA950-SEP - 80V Ultra-Precise Current-Sense Amp | TI

The INA950-SEP from Texas Instruments is a space-enhanced product (SEP) current-sense amplifier designed for ultra-precise current measurements in high-reliability applications. It senses the voltage drop across a shunt resistor over a wide common-mode range from 2.7V to 80V, making it ideal for high-side current sensing in systems with large supply voltages. The device operates from a single 2.7V to 5.5V supply while drawing only 370μA (typical) of quiescent current, and is available in the TSSOP-8 package. A current-sense amplifier is a specialized operational amplifier that measures current by amplifying the small differential voltage across a sense resistor while rejecting the common-mode voltage. It is a key building block in power management systems, enabling accurate monitoring of load currents, battery charging, and power supply health. The INA950-SEP belongs to the family of analog current-sense amplifiers, which are essential for closed-loop control and protection in industrial, automotive, and aerospace systems. Key features include a wide common-mode input range of 2.7V to 80V, a bandwidth of 1.1MHz, and ultra-precise gain accuracy. The device is designed for space applications, offering enhanced radiation tolerance and reliability. Its low quiescent current of 370μA minimizes power consumption, making it suitable for battery-powered and energy-harvesting systems. The TSSOP-8 package provides a compact footprint for space-constrained PCBs. Technically, the INA950-SEP uses a precision current-sense architecture that maintains high accuracy across temperature and supply variations. The wide common-mode range allows it to monitor currents on high-voltage rails without level shifting, simplifying system design. The 1.1MHz bandwidth enables fast transient response, which is critical for detecting overcurrent conditions in real time. Typical applications include high-side current sensing in power supplies, battery management systems, motor control, and load switches. In space applications, it is used for power monitoring in satellites and spacecraft, where reliability and precision are paramount. The device's wide common-mode range and low power consumption make it versatile for both high-voltage and low-power systems. When designing with the INA950-SEP, ensure that the shunt resistor is placed in the high-side path and that the common-mode voltage does not exceed the absolute maximum rating. Proper PCB layout with Kelvin connections to the shunt resistor is essential to minimize parasitic resistance and maintain measurement accuracy.

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