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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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
IR4301MTRPBF - 160W Mono Class D Audio Amplifier | Infineon
The Infineon IR4301MTRPBF is a 1-Channel (Mono) Class D integrated digital audio amplifier that delivers up to 160W into a 4 ohm load from a 22-pin PowerVQFN (5x6 mm) package. The part integrates a PWM controller, a high-voltage gate driver, and two low-RDS(on) MOSFETs into a single multichip module, and it accepts a fully differential or single-ended analog input with no DSP required. According to the Infineon IR4301M datasheet, the device achieves a typical output noise floor of 250 uVrms and operates from a split or single power supply. A Class D audio amplifier is a switching amplifier topology that drives the loudspeaker with pulse-width modulated square waves at hundreds of kHz, then low-passes them in the speaker itself. The IR43x1 family therefore belongs to the audio amplifier IC class of products, which itself sits inside the broader amplifier IC and integrated circuit hierarchy. Compared with classic linear (Class AB) amplifiers, Class D designs reach efficiencies above 90 percent, which lets the IR4301M deliver high peak music power without a mechanical heatsink in typical music playback use. Key features include integrated analog input with no MCU code required, high peak music power output, no mechanical heatsink requirement, split or single supply operation, and differential or single-ended input. Integrated protections cover over-current, over-temperature, and under-voltage conditions. The 5 mm by 6 mm PQFN22 footprint exposes the die to a thermal pad that conducts waste heat to the PCB copper, which is the primary cooling path in compact audio products. The IR4301M multichip module uses an optimized co-packed MOSFET pair driven by a dedicated controller, so the gate drive and dead time are matched to the output stage. High voltage ratings and noise immunity in the controller IC ensure reliable operation over a wide range of environmental conditions. The amplifier is specified for industrial temperature grade and supports both bridge-tied-load and single-ended output configurations through the same pinout. Typical applications include soundbars, subwoofers, mini-component stereo systems, portable Bluetooth speakers, and integrated active speaker modules. The device is also used in automotive aftermarket amplifiers and pro-sumer desktop audio. Designers choose this part when they need a small, thermally friendly mono Class D stage that can be driven directly from an analog audio source. When designing with the IR4301M, place the LC output filter components close to the device and provide a substantial copper pour on the exposed pad to dissipate the idle losses. The datasheet recommends a ferrite-core inductor around 10 to 22 uH and an X7R film or ceramic filter capacitor matched to the load impedance. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone. The IR43x1 family covers the IR4301M, IR4311M, and IR4321M, which differ mainly in output power and supply voltage rating.
IR4302MTRPBF - 2-Ch Class D 130W Stereo Amp | Infineon
The Infineon IR4302MTRPBF is a 2-channel integrated analog-input Class D audio amplifier IC that combines a dual-channel PWM controller, a high-voltage gate driver, and four low-RDS(on) digital audio MOSFETs in a single 44-pin PQFN (7x7 mm) package. According to manufacturer datasheet, it delivers up to 130 W peak music output per channel into 4 ohm loads, operates from a split or single ±21 V (or single 10 V to 42 V) supply, and provides differential or single-ended analog inputs. Differential analog noise floor is specified at 250 uVrms, and the part integrates standard Class D protections including over-current, over-temperature, and under-voltage lockout. A Class D audio amplifier is a switching-mode power amplifier that uses pulse-width modulation (PWM) at hundreds of kHz to drive the output stage, achieving efficiencies typically above 90% - compared with 50-65% for Class AB designs - by ensuring the output transistors are either fully on or fully off. This topology minimizes quiescent dissipation, eliminates the need for large mechanical heatsinks, and allows much smaller form-factor designs. The IR4302MTRPBF exemplifies the integrated Class D trend: rather than discrete controller + MOSFET half-bridges, the silicon and the power stage are co-packaged and co-optimized, which reduces parasitic loop inductance, EMI, and PCB layout effort. Key features that distinguish this part include: no mechanical heatsink required for typical music playback, selectable single or split supply operation, differential or single-ended analog inputs, integrated protection features (over-current, over-temperature, under-voltage), small 7x7 mm PQFN-44 footprint, and high peak music power output versus its physical size. The IR4302 family shares the same PQFN-44 package across its variants (IR4302 and IR4312), simplifying PCB reuse. Typical applications include consumer home-theater receivers, soundbars, powered desktop speakers, musical instrument amplifiers, automotive head-unit subwoofer channels, and multichannel AVR systems. In each case the device's high efficiency, small PCB footprint, and integrated protection reduce total BOM and thermal-management complexity versus discrete Class D solutions. Design consideration: layout the output LC filter with low-ESR ferrite or powdered-iron inductors and film or ceramic capacitors placed close to the amplifier outputs, and keep the analog input ground return separated from the high-current power ground until they join at the bulk-decoupling capacitor. Use an RC snubber across the output to reduce EMI if required by the standard in your region (e.g., FCC Part 15, EN55032). This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
IRS20124CD - 200V Digital Audio Driver | Infineon
Infineon Technologies IRS20124CD is a digital audio driver IC designed for Class D amplifier output stages, with verified source information identifying a 200 V high-voltage rating and support for programmable dead-time generation. It is associated with the IRS20124S family, whose manufacturer description identifies integrated dead-time generation and bidirectional over-current sensing for simplified output-stage design. The device is intended to drive discrete power transistors rather than directly delivering loudspeaker current, making external MOSFET or IGBT selection an important part of amplifier design. A digital audio driver is a gate-drive IC used between a Class D controller and the power switching transistors in an audio amplifier. It translates control signals into high-voltage gate drive, manages timing between complementary switching devices, and can provide protection functions. This places the IRS20124CD in the broader power-management and audio-amplifier hierarchy: Class D amplifier controller, digital audio driver, discrete power stage, loudspeaker output. The verified family information highlights programmable dead-time through the DT/SD pin, allowing external resistor-based timing adjustment with only two external resistors. Proper dead-time prevents simultaneous conduction in the complementary output devices, while bidirectional over-current sensing helps the amplifier react to abnormal output-stage conditions. These features are central to designing a robust discrete switching stage rather than relying on uncontrolled gate timing. The IRS20124CD is associated with up to 1000 W output-power capability in Class D audio applications according to the supplied IRS20124S family source snippet. The exact electrical ratings, thermal limits, package dimensions, and pin assignments for the CD suffix were not present in the verified data, so those values must be confirmed against the Infineon manufacturer datasheet before layout or production use. The family is particularly relevant to powered speakers, subwoofers, PA systems, and automotive or industrial audio equipment where a discrete MOSFET output stage is preferred. Designers should treat the IRS20124CD as a high-voltage gate driver, not as a complete audio amplifier. External switching transistors, DC-link voltage, current sensing, dead-time components, gate resistors, heat sinking, and output filtering must be designed together. The family’s programmable dead-time and bidirectional current sensing reduce control complexity, but exact component values and protection thresholds require the manufacturer datasheet. This page distinguishes verified family-level information from CD-suffix-specific data that is unavailable in the supplied results. It also emphasizes practical selection criteria, including package confirmation, voltage rating, gate-drive compatibility, current limits, thermal performance, and amplifier topology before treating any substitute as a true drop-in replacement.
IRS2052MTRPBF - 2-Ch 200V Class D Audio Driver | Infineon
The Infineon IRS2052MTRPBF is a 2-channel (stereo) high-voltage Class D audio amplifier driver IC integrating dual PWM modulators, gate drivers, and comprehensive protection features in a 48-pin MLPQ (7x7 mm) package. It supports an analog audio input and drives external complementary power MOSFETs in a half-bridge or full-bridge output stage, delivering high-efficiency amplification suitable for subwoofer, two-channel, and bridge-tied load (BTL) Class D topologies. A Class D audio amplifier is a switching amplifier topology that uses pulse-width modulation (PWM) to drive the output stage fully on or fully off, dramatically reducing power dissipation compared to a linear (Class A/B) amplifier. The IRS2052M occupies the 'controller + gate driver' layer of the audio amplifier hierarchy (Class D controller -> audio amplifier -> amplifier IC -> signal chain IC -> semiconductor), making it the brain and gate-drive interface between the analog audio front end and the high-current MOSFET output stage. Key features include a 200 V high-voltage rating (suitable for ±100 V rails), programmable dead-time, integrated over-current and over-temperature protection, clipping detection output for dynamic speaker management, and a versatile shutdown control that supports latched, non-latched, or host-controlled modes. The IRS2052M operates from a logic supply and a high-voltage bootstrap supply, enabling self-powered gate drive for the high-side MOSFETs of each half-bridge. The device integrates proprietary PWM modulation with adjustable switching frequency (typically 400 kHz to 800 kHz range) to balance audio band noise rejection against switching losses. An external thermal sensor input allows system-level thermal monitoring beyond the on-chip thermal shutdown, critical in space-constrained multi-channel amplifiers and automotive audio systems. Typical applications include powered subwoofers, home theater receivers, automotive head units and external amplifiers, professional powered speakers, and marine/PA systems. Its 200 V rating enables high-power designs (several hundred watts per channel) with appropriate output MOSFET selection and output filter design. When designing with the IRS2052M, prioritize gate-drive loop layout to minimize parasitic inductance on the high-current path, and carefully select bootstrap capacitor values based on switching frequency and high-side MOSFET gate charge. Always pair the IRS2052M with logic-level or standard-threshold MOSFETs whose total gate charge supports the programmed switching frequency without exceeding the IC's drive capability. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
IRS2053MPBF - 3-Channel 6.2W Class-D Amplifier | Infineon
The Infineon Technologies IRS2053MPBF is a three-channel Class-D digital audio power amplifier rated for a 10 V to 15 V supply and 6.2 W output power, housed in a 48-pin MLPQ package measuring 7 mm by 7 mm. It integrates the modulator, power-stage, and protection functions needed to drive three audio channels efficiently. Programmable bidirectional current sensing protects the high-side and low-side MOSFETs from overcurrent conditions. Its surface-mount MLPQ construction supports compact Class-D audio systems where reduced board area and efficient power conversion are important. A Class-D audio amplifier is a switching power amplifier that uses pulse-width modulation to represent an audio waveform. Unlike a linear audio amplifier, it spends less time between the positive and negative supply rails, improving power-conversion efficiency and reducing heat in many listening-power applications. The IRS2053MPBF sits within the hierarchy of audio amplifiers, power amplifiers, switching amplifiers, and power-management semiconductors. The verified product information identifies three amplification channels, Class-D operation, a 6.2 W output-power rating, and a 10 V to 15 V supply-voltage range. Its integrated current-sensing function is a key protection feature for the output power stage. The small MLPQ48 package is specifically associated with the smaller physical footprint made possible by Class-D topology, although exact output power per channel, efficiency, modulation frequency, thermal resistance, and load limits require confirmation from the manufacturer datasheet. Typical uses include compact powered speakers, multimedia speaker systems, consumer audio equipment, and other multi-channel sound systems powered from a 10 V to 15 V source. A three-channel device is useful when one board must drive multiple speakers or separate audio zones. System designers should account for supply headroom, speaker impedance, filtering, amplifier stability, PCB thermal performance, and the protection requirements of each output stage. For layout, the exposed thermal and electrical features of the MLPQ package require careful copper and via treatment according to the manufacturer recommendations. The audio output filter should be selected for the switching characteristics and load, while input and supply routing should be kept compact. Because verified thermal, frequency, protection-delay, and electrical-limit details are unavailable in the supplied excerpts, those values must be checked against the complete manufacturer datasheet before release to production. This page consolidates the verified distributor and datasheet-index information, separates confirmed specifications from missing technical data, and provides practical guidance for evaluating this amplifier. It does not infer substitute pinouts or claim drop-in compatibility without manufacturer or web evidence.
IRS2053MTRPBF 3-Ch 10-15V 6.2W Class D Driver | Infineon
The Infineon IRS2053MTRPBF is a three-channel, high-performance Class D audio amplifier driver with integrated PWM modulators and protection, designed for a 10 V to 15 V supply and a 48-pin MLPQ (7 x 7 mm) package. The verified data identifies it as a 3-channel device associated with 6.2 W output and 60 dB gain, making it suitable for external-MOSFET automotive audio power stages. Its 0.50 mm package pitch supports compact layouts, while its -40 °C to 125 °C operating range addresses harsh automotive environments. The device is RoHS compliant according to the provided source. A Class D audio driver is a controller or gate-drive device that uses pulse-width modulation to drive external power MOSFETs in an audio half-bridge or full-bridge output stage. Unlike a conventional linear audio amplifier, the switching output stage can deliver audio with lower power dissipation than a comparable linear stage, although EMI filtering and careful layout remain important. The IRS2053 integrates three channels so a complete three-channel amplifier can be formed with external MOSFETs and passive components. Key verified features include three audio channels, a 10 V to 15 V supply range, 6.2 W output capability in the cited series description, 60 dB gain, a 48-MLPQ package measuring 7 x 7 mm, and 0.50 mm pitch. The package also has an exposed pad according to the supplied product-page description. The -40 °C to 125 °C temperature range supports automotive and industrial audio systems, while RoHS compliance supports regulated manufacturing and product-environment requirements. The IRS2053 uses floating analog inputs and a protection-control interface intended for external MOSFET half-bridge stages. In implementation, the three PWM outputs drive external power devices, while input conditioning, gate resistors, supply decoupling, output filtering, and protection components complete the power stage. Exact output power, modulation details, pin names, current limits, and timing values were not included in the provided verified data and must be confirmed in the manufacturer datasheet before layout or production use. Typical applications include automotive head units, three-channel infotainment systems, seat or console audio, and compact external Class D power modules. A three-channel arrangement can support front left, front right, and a center, subwoofer, or rear channel, depending on the amplifier architecture. The 10 V to 15 V supply range is suitable for automotive battery-derived rails after suitable regulation and filtering, but the exact automotive transient and operating requirements are not provided here. Designers should follow the manufacturer datasheet for exposed-pad thermal design, input filtering, power-supply decoupling, MOSFET selection, gate-loop layout, EMI control, and protection configuration. Because the provided data does not include complete pin-level definitions or verified electrical limits, no pin-level substitute should be assumed merely because it uses a nominally similar package.
IRS2092PBF - 500W Protected Class D Driver | Infineon
The Infineon Technologies IRS2092PBF is a protected, high-voltage, mono Class D audio amplifier driver with an integrated PWM modulator, operating from a 10 V to 18 V supply and supporting a 500 W audio power stage. It is packaged in a 16-lead PDIP package and requires two external MOSFETs plus a few external components to realize a complete protected Class D power amplifier. A Class D audio amplifier driver is a controller for a switching audio power stage. It accepts an analog audio signal, generates the required PWM drive signals, and controls external power transistors that deliver current efficiently to a loudspeaker. Within the power-management and audio hierarchy, the IRS2092 sits between the audio source and discrete output MOSFETs rather than directly driving a speaker. Key features include a high-voltage, high-performance Class D architecture, integrated PWM modulation, floating inputs for straightforward half-bridge implementation, and programmable bidirectional over-current protection. The 16-lead PDIP package supports through-hole assembly. The verified distributor listing identifies the device as a one-channel mono Class D amplifier IC and describes its operating supply as 10 V to 18 V. The device is intended for high-power audio systems where external power MOSFETs provide the speaker current. Its modulator determines the switching command delivered to those devices, while the protection function helps prevent excessive current during abnormal output conditions. The exact output-power conditions, switching frequency, propagation delay, quiescent current, and thermal limits were not supplied in the retrieved data and should be confirmed from the manufacturer datasheet before final design release. Typical uses include mono subwoofer amplifiers, professional audio power stages, high-current speaker drivers, and compact Class D amplifier modules. The architecture is particularly relevant where a bridge-tied half-bridge output is desired and where two external MOSFETs are acceptable. Designers should treat MOSFET selection, gate-loop layout, heat-sink sizing, dead time, output filtering, and protection thresholds as system-level engineering tasks. The driver IC does not eliminate the need for a correctly rated power stage, and its published 500 W capability is not an all-load guarantee. This page combines verified distributor specifications, datasheet links, replacement-screening constraints, and practical implementation guidance. It distinguishes confirmed IRS2092PBF facts from parameters that remain unavailable in the supplied source set.
IRS2092SPBF - Protected 100V Class-D Driver | Infineon
The Infineon Technologies IRS2092SPBF is a protected, high-voltage, mono Class-D audio amplifier driver rated for a 100 V maximum supply and 500 ns gate-drive timing, integrated with an 800 kHz PWM modulator and protection functions. It is packaged in a narrow 16-lead SOIC. The device works with two external power MOSFETs and a small number of passive components to implement a complete protected Class-D audio power stage. A Class-D audio amplifier driver is a specialized gate-drive IC that converts an analog audio input into high-frequency PWM signals for external half-bridge MOSFETs. The IRS2092SPBF belongs to the audio-amplifier-driver hierarchy, combining modulator, gate-driver, and protection functions in one controller. Unlike a finished audio output amplifier, it requires external power transistors, gate resistors, passive networks, and an appropriate output filter. The verified product information identifies the device as a mono, analog-input Class-D amplifier with digital audio amplification behavior. Its stated 100 V voltage class, 500 ns timing value, and 800 kHz associated switching specification are useful for evaluating gate-drive bandwidth and system architecture. The integrated protection is intended to improve robustness in external-MOSFET audio power stages, although exact protection thresholds and conditions must be confirmed from the manufacturer datasheet. Typical uses include compact stereo or multichannel audio systems, powered speakers, automotive audio infrastructure, home-theater equipment, and industrial audio products. The device is most appropriate when the designer wants controller-level flexibility with discrete MOSFET selection rather than a fixed integrated power amplifier. The 16-SOIC package also makes it compatible with conventional surface-mount PCB assembly processes. A critical design consideration is that controller ratings do not determine the final speaker power. Output power depends on external MOSFET selection, supply voltage, modulation strategy, output filter, transformer or speaker impedance, and thermal design. Use the manufacturer datasheet and application circuits for gate-drive timing, dead-time behavior, fault handling, bootstrap or high-side supply requirements, and PCB layout. This product record consolidates the verified manufacturer and distributor descriptions with practical application guidance and explicitly identifies parameters that require confirmation before layout or production release.
IRS2092STRPBF - 200V Mono Class D Audio Driver | Infineon
Infineon Technologies IRS2092STRPBF is a high-voltage, high-performance mono Class D audio amplifier driver with an integrated PWM modulator and protection functions. It operates from a 200 V supply according to the Mouser product listing, uses an integrated analog input, and drives external MOSFETs to form a complete audio power stage. The device is packaged in a narrow 16-lead SOIC. Its architecture supports floating inputs for convenient half-bridge implementation, programmable bidirectional over-current protection with self-reset, and programmable preset deadtime. These characteristics position the IRS2092STRPBF as a gate-driver-class audio IC rather than a conventional line-output amplifier: it accepts a low-level audio signal and controls the switching of external power MOSFETs that deliver energy to a loudspeaker. The external MOSFET selection remains central to output power, switching loss, and thermal performance. Use the manufacturer datasheet for the complete electrical limits, truth tables, timing characteristics, protection behavior, pin descriptions, and recommended application circuit. The supplied search results also identify the device as a 16-SOIC, single-channel Class D amplifier driver and describe the IRS2092 family as intended for high-voltage audio systems. In a typical implementation, the IRS2092STRPBF drives a self-oscillating or externally controlled half-bridge stage, while protection logic helps contain overload conditions. Board layout, gate-loop layout, and the high-voltage power stage deserve careful review because the driver interfaces directly with fast-switching external MOSFETs.
IRS20954SPBF - Class D Audio Driver, 2-Ch, 16-SOIC | Infineon
The Infineon IRS20954SPBF is a 2-channel protected digital audio driver designed for Class D audio amplifier applications, housed in a 16-pin SOIC package with surface-mount mounting. The device combines high-voltage gate-drive capability with integrated analog protection features, targeting single-ended or bridge-tied-load (BTL) Class D output stages in consumer and prosumer audio equipment. The PBF suffix indicates lead-free (Pb-free) terminal finish per RoHS requirements. A Class D audio driver is a specialized gate-driver / controller that translates low-level PWM or analog audio inputs into the high-current, high-voltage switching signals required by the output MOSFETs in a Class D amplifier. The IRS20954 belongs to the audio-special-purpose IC family, sitting hierarchically between a DSP/modulator front-end and a discrete power-MOSFET output stage, and is itself a member of the broader switch-mode power semiconductor driver category. Key features include a floating PWM input that enables easy half-bridge implementation, integrated programmable bi-directional over-current protection with a self-reset function, programmable compensated preset dead-time for improved THD performance, and high noise immunity. The 2-channel architecture supports stereo BTL or single-ended mono output configurations, and the integrated protection block reduces external component count compared to discrete gate-driver + comparator solutions. The IRS20954 uses a high-side/low-side gate-driver topology with internal level shifting, allowing direct interface to a PWM modulator or analog front-end. The bidirectional OC protection monitors load current through the low-side FET R_DS(on) without an external shunt resistor, simplifying layout and reducing conduction loss. Preset dead-time is trimmed at the factory to optimize shoot-through immunity versus THD at the switching node. Typical applications include home theater receivers, powered subwoofers, multimedia speakers, automotive head-unit amplifiers, and pro-sound active loudspeakers. The 16-SOIC footprint is footprint-compatible with the related IRS20955 and IRS20957 family members, allowing PCB reuse across product variants. When designing with this part, observe the absolute maximum ratings on VCC and bootstrap voltages, and follow the application note for output-stage MOSFET selection to ensure OC trip thresholds remain within the safe operating area under all load conditions.
IRS2461SXUMA1 - 1-Channel Class-D Audio Amp | Infineon
The Infineon Technologies IRS2461SXUMA1 is a discrete 1-channel Class-D audio amplifier IC with an analog audio input and a 20-lead SOIC package. The verified manufacturer listing identifies the IRS2461S family as a discrete Class-D audio amplifier, while the distributor results classify IRS2461SXUMA1 as an audio amplifier IC. Its defined role is to drive a single speaker channel from an analog source, making it relevant to compact consumer audio, portable speakers, soundbars, and other single-channel amplification systems. A Class-D audio amplifier is a switching power amplifier that uses transistor switching stages to deliver audio energy to a speaker. Compared with a linear audio amplifier, the Class-D category is associated with high conversion efficiency, but the verified data supplied for IRS2461SXUMA1 does not state output power, efficiency, switching frequency, THD+N, load impedance, or thermal limits. Those parameters must therefore be confirmed in the manufacturer datasheet before sizing a speaker, selecting a heatsink, or setting gain. The verified package information is specific: Infineon lists the IRS2461S family in a 20-lead SOIC package. The 20-lead package is suitable for conventional surface-mount PCB assembly, while the exact exposed-pad arrangement and pin functions are not present in the supplied data. The LCSC result reports availability from $2.4487, and Heisener reports a reference unit price of $3.4419 with 7,536 pieces in stock; these commercial figures are retained as separate source observations and are not treated as a universal price quote. Typical design use places the analog audio input at the amplifier, with speaker-drive connections and bypass or support networks selected according to the manufacturer reference design. The exact input sensitivity, gain settings, filter values, supply limits, and pin mapping are unavailable in the provided sources. Engineers should use the official Infineon IRS2461S documentation and validate acoustic output, distortion, thermal behavior, and EMI performance in the final enclosure. This page emphasizes verified sourcing information and clearly identifies missing technical fields rather than estimating them. It combines the manufacturer product classification, distributor observations, package information, application context, and engineering caveats for engineers evaluating an audio amplifier IC.