CI amplificadores
Productos (793)
OPA4192IPW - 36V Quad Precision RRIO Op Amp | Texas Instruments
The Texas Instruments OPA4192IPW is a 36V, low-noise, low-quiescent-current, rail-to-rail input/output (RRIO) precision operational amplifier with e-trim technology, supplied in a 14-pin TSSOP (PW) package. It belongs to the OPAx192 family (OPA192 single, OPA2192 dual, OPA4192 quad) and delivers 10 MHz unity-gain bandwidth, 20 V/µs slew rate, and ±5 µV typical input offset voltage in a quad-channel configuration. The device operates from 8V (4.5V single-supply equivalent) to 36V (single supply) or ±4V to ±18V (dual supplies). An operational amplifier (op amp) is a high-gain DC-coupled electronic voltage amplifier with differential inputs and a single-ended output that uses external feedback components to set transfer characteristics. Precision op amps form a sub-category optimized for low offset, low drift, low bias current, and low noise, and they sit within the broader hierarchy: operational amplifier -> analog amplifier -> linear IC -> power management & signal chain. The OPAx192 e-trim family improves offset and drift during final test, eliminating the need for the user to null the offset externally. Key differentiating specifications include 5.5 nV/√Hz input voltage noise density at 1 kHz, 1.8 mV maximum input offset voltage over temperature, 5 pA typical input bias current, 1 mA quiescent current per channel, and a robust 36V absolute-maximum supply rating. The RRIO topology swings within a few millivolts of both rails on input and output, simplifying single-supply designs and maximizing dynamic range when powering low-voltage ADCs from higher analog rails. The OPA4192 uses TI's e-trim trimming process combined with a CMOS input stage, providing low input bias current (5 pA typical) and low noise without the drawbacks of traditional JFET or bipolar input stages. Its MUX-friendly input architecture prevents input over-voltage back-flow to the supply when the input exceeds the rails, allowing the device to sit on the same signal bus as switched-capacitor multiplexers without interaction. Typical applications include precision analog input modules for industrial PLCs, multi-channel data acquisition front ends, instrumentation signal conditioning, active filters and buffers for test & measurement equipment, and transducer amplifiers for pressure, strain-gauge, and thermocouple sensors. The quad channel count is well suited for bridge-type sensors that need excitation buffering plus three instrument amplifiers per channel, or for four-channel analog input modules on factory-automation backplanes. Design considerations include adequate PCB thermal relief for 36V operation, input protection when the source impedance is high, and supply decoupling within 5 mm of each supply pin. The MUX-friendly input eliminates the need for additional series input resistors in many multiplexed applications, simplifying the BOM and reducing board area. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on a typical DigiKey or Mouser product page, giving engineers a one-stop technical summary for the OPA4192IPW.
OPA4209AIPWR - Quad 2.2nV/rtHz 18MHz 36V Precision Op Amp | TI
The Texas Instruments OPA4209AIPWR is a quad-channel, 2.2 nV/√Hz, 18 MHz, precision, rail-to-rail output (RRO) operational amplifier supplied in a 14-pin TSSOP (PW) package, specified for operation from -40 °C to +125 °C. It supports supply voltages from 4.5 V to 36 V single-supply (or ±2.25 V to ±18 V dual-supply), delivering a maximum supply current of 2.5 mA per channel while achieving very low voltage noise density. The combination of low noise, wide bandwidth, low offset, and rail-to-rail output swing makes it ideal for high-resolution signal acquisition. An operational amplifier is a high-gain DC-coupled electronic voltage amplifier with differential inputs and a single-ended output, forming the fundamental building block of analog signal chains. Precision op amps in particular target low offset voltage, low input bias current, low noise, and high open-loop gain so they can amplify millivolt-level signals without adding meaningful error. The OPA4209 belongs to the precision low-noise op-amp family (precision op amp -> low-noise amplifier -> operational amplifier -> analog IC -> semiconductor), bridging sensor/transducer signal conditioning and downstream ADC drivers. Key features include 2.2 nV/√Hz input voltage noise density at 1 kHz, 18 MHz unity-gain bandwidth, 6.5 V/µs slew rate, 130 dB open-loop gain (AOL), 150 µV typical input offset voltage, and rail-to-rail output swing. The device is unity-gain stable and accepts capacitive loads up to 1 nF, simplifying its use as a buffer or transducer interface without external compensation. The TSSOP-14 surface-mount package has a thermal resistance (θJA) of approximately 130 °C/W, requiring attention to total dissipation in multi-channel operation at high ambient temperature. The OPA4209AIPWR uses TI's proprietary precision bipolar process with a trimmed input stage to deliver 130 dB AOL and low offset drift across the full -40 °C to +125 °C range. Its CMOS-compatible input bias current (~ 1 nA typical) simplifies interface to high-impedance sensors and photodiode front ends. The RRO architecture eliminates the need for negative rails in single-supply systems, maximizing dynamic range in low-voltage 5 V or 12 V designs. Typical applications include precision data acquisition front ends, 16-bit and 18-bit SAR ADC drivers, industrial process-control analog I/O, multi-channel sensor signal conditioning (strain gauge, RTD, thermocouple), medical instrumentation, test-and-measurement equipment, and active filters. The wide 36 V supply range also makes it suitable for ±15 V pro-audio and industrial automation boards. When designing with this amplifier, observe the input common-mode range which extends to the negative rail but stays approximately 1.5 V below the positive rail (it is not a true RRIO). For 5 V single-supply designs, this is usually not a problem; for 36 V designs, ensure VCM stays within the linear input range to avoid distortion. This page synthesizes distributor pricing, drop-in alternatives (including same-brand TSSOP-14 quads from the OPAx209 family and cross-brand equivalents), comparison parameters, and practical design notes not found in the manufacturer datasheet.
OPA4374AIDR - Quad 6.5MHz RRIO Op Amp | Texas Instruments
The Texas Instruments OPA4374AIDR is a quad-channel, 5.5V, 6.5MHz, rail-to-rail input and output (RRIO) CMOS operational amplifier supplied in a 14-pin SOIC package, designed for low-power, low-cost precision signal conditioning across industrial, portable, and consumer systems. It delivers a 6.5 MHz gain-bandwidth product and 5 V/us slew rate while consuming only 585 uA of quiescent current per channel, giving designers a strong speed-to-power ratio in a small surface-mount footprint. An operational amplifier (op amp) is a high-gain differential DC-coupled amplifier that uses external feedback to set gain, bandwidth, and transfer characteristics; it is the foundational building block of analog signal chains. Quad op amps integrate four independent amplifiers into a single package, reducing board area and channel-to-channel matching error in multi-channel systems such as sensor arrays, audio front-ends, and active filters. The OPA4374 extends this topology into the CMOS process node, achieving rail-to-rail input and output swing on a single supply up to 5.5V, which maximizes dynamic range in low-voltage designs. Key specifications include a maximum input offset voltage of 5 mV, a low input bias current of 10 pA maximum, 6.5 MHz unity-gain bandwidth, 5 V/us slew rate, 585 uA per-channel quiescent current, and a CMOS input stage that extends 200 mV beyond both supply rails. The output swings to within 25 mV of either rail at moderate load, and the device operates from a single 2.7V to 5.5V supply, or +/-1.35V to +/-2.75V from split rails. The OPA4374AIDR is specified across the -40C to +125C industrial temperature range and is offered in a 14-pin SOIC (D) package with RoHS-compliant lead-free (Pb-free) matte-tin plating. Architecturally, the OPA4374 uses a CMOS input differential pair followed by a class-AB output stage that delivers ~30 mA of short-circuit output current and supports capacitive loads up to ~1 nF in unity-gain configurations. The RRIO topology uses complementary N- and P-channel input stages that combine in a summing node to extend the common-mode range beyond the rails, while the output stage uses charge-pump-free rail-sensing to maintain output swing close to both rails. EMI rejection is enhanced by the small input-stage capacitance and the wide GBW relative to typical industrial noise frequencies. Typical applications include multi-channel sensor signal conditioning, battery-powered instrumentation, active filters, transimpedance amplifiers for photodiodes, and low-side or high-side current sensing. Designers often choose the OPA4374 when four channels, low power, and rail-to-rail swing must coexist in a small industrial footprint. When designing with this device, verify that the input common-mode voltage stays within the specified 200 mV beyond-rail range and ensure the output stage sees a load no smaller than ~2 kOhm to preserve linearity, especially at the top end of the supply.
OPA4488 - Quad 48V 14MHz Zero-Drift Op Amp | TI
The OPA4488 is a quad, 48V, 14MHz, zero-drift, mux-friendly CMOS precision operational amplifier from Texas Instruments. It operates from a 4.5V to 48V supply voltage range and features a 60V absolute maximum rating, enabling robust circuit designs in industrial and automotive applications. The device is available in a 14-pin SOIC package (DR) and a 14-pin TSSOP package (PW), providing flexibility for various PCB layouts. An operational amplifier (op amp) is a high-gain voltage amplifier with differential inputs and a single-ended output, used in signal conditioning, filtering, and mathematical operations. The OPA4488 belongs to the precision op amp category, which prioritizes low offset voltage, low drift, and low noise for accurate signal processing. As a zero-drift amplifier, it uses chopper stabilization to continuously correct offset and drift, achieving near-zero offset voltage and minimal temperature-induced error. Key features of the OPA4488 include a low quiescent current of 1.5mA per amplifier, a wide bandwidth of 14MHz, and a low noise density of [DATA_NEEDED: input voltage noise density]. The zero-drift architecture provides an offset voltage of [DATA_NEEDED: offset voltage] and a drift of [DATA_NEEDED: offset drift], making it ideal for precision applications. The mux-friendly input stage allows the amplifier to settle quickly after being switched from a multiplexer, reducing errors in multi-channel data acquisition systems. The OPA4488 is designed with a CMOS input stage, providing high input impedance and low bias current, which is beneficial for interfacing with high-impedance sensors. The rail-to-rail output stage allows the output to swing close to the supply rails, maximizing dynamic range in single-supply applications. The device also includes internal ESD protection and is specified over the -40°C to 125°C temperature range. Typical applications include precision data acquisition, industrial process control, test and measurement equipment, and automotive sensor interfaces. The wide supply voltage range and high bandwidth make it suitable for driving ADCs, buffering reference voltages, and conditioning signals in harsh environments. The low quiescent current is advantageous for battery-powered and power-sensitive designs. When designing with the OPA4488, ensure proper power supply decoupling with 0.1uF ceramic capacitors close to the supply pins. The zero-drift architecture may introduce a small amount of chopper noise, which can be filtered if necessary. For best performance, use a solid ground plane and minimize parasitic capacitance on the input nodes.
OPA547F/500 - 500mA High-Voltage Op Amp w/ Shutdown | Texas Instruments
The Texas Instruments OPA547F/500 is a high-voltage, high-current operational amplifier capable of delivering 500 mA continuous output current from a wide single supply (8 V to 60 V) or dual supply (±4 V to ±30 V) rail, housed in a 7-pin TO-263 (DDPAK-7, KTW) surface-mount power package. Designed for direct drive of resistive, inductive, and piezoelectric loads, the device combines a 1 MHz gain-bandwidth product with a 6 V/µs slew rate and integrates both adjustable current limit and thermal shutdown protection. What is a high-current power operational amplifier? A high-current power op amp is a specialized linear integrated circuit that combines the precision, feedback control, and closed-loop stability of a general-purpose op amp with the output drive capability required to source or sink hundreds of milliamps directly into a load. Unlike a small-signal op amp, the power op amp includes on-chip thermal protection, wide supply-voltage tolerance, and often an output-disable or shutdown pin. In the system hierarchy it sits between a low-level control circuit (such as a microcontroller DAC, a sensor conditioner, or an analog signal path) and a high-power load (motors, solenoids, heaters, audio transducers). The OPA547 belongs to this power-op-amp category and is widely used as a programmable current source, H-bridge driver, audio line driver, or high-voltage transducer amplifier. Key features of the OPA547F/500 include a wide output voltage swing that approaches each supply rail, fully-protected operation with user-adjustable current limit via a single external resistor, dedicated Enable/Shutdown (E/S) pin with a status flag, and thermal shutdown indication. The integrated protections dramatically reduce external component count and simplify PCB layout in motor, solenoid, and valve driver designs. Architecturally, the OPA547 uses a complementary bipolar output stage capable of swinging within ~1 V of each rail at full load, paired with a precision input stage that provides 100 nA input bias current and 1 mV typical input offset voltage. The combination delivers dc accuracy suitable for closed-loop transducer biasing while still providing the high transient current demanded by reactive loads. Typical applications include high-voltage motor and solenoid drivers, programmable voltage and current sources, valve and actuator control in industrial automation, audio amplifiers and line drivers, and test-and-measurement power boosters. The wide supply range also makes it suitable for 24 V industrial bus systems and 48 V telecom/battery systems. When designing with the OPA547F/500, ensure the PCB copper pour under the exposed tab is sized to keep junction temperature within the 150 °C maximum, and choose the ILIM resistor carefully to set the current-limit threshold just above the maximum required load current to avoid false triggering yet still protect against short circuits. This page synthesizes the manufacturer datasheet, current distributor pricing, pin-compatible alternatives, and practical design notes to support fast, reliable selection for power analog designs.
OPA551UA/2K5 - 60V High-Voltage High-Current Op Amp | TI
The Texas Instruments OPA551UA/2K5 is a high-voltage (60 V), high-current (380 mA typical) operational amplifier supplied in an 8-pin SOIC (D) package, tape-and-reel packaged as the /2K5 shipping variant. It is unity-gain stable, offers a 15 V/us slew rate, 3 MHz of gain-bandwidth product, and operates from +/-30 V supplies (or a single 60 V supply). The device is specified across the -40 C to +125 C industrial temperature range and delivers low-level signal accuracy through monolithic laser-trimmed input stages. A high-power operational amplifier (high-voltage op amp) is an analog IC that can both swing its output close to the rails and source/sink substantial load current while preserving small-signal fidelity. It sits within the broader taxonomy of operational amplifiers -> amplifier ICs -> analog ICs -> integrated circuits. Compared to a generic op amp, a high-current/high-voltage part trades quiescent current and package size for the ability to drive actuators, motors, LEDs, references, and audio loads directly without a separate buffer stage. Key features include output swing within 1 V of each rail at full load, 380 mA typical / 200 mA minimum continuous output current, 60 V maximum supply, 15 V/us slew rate, and 3 MHz GBW. Protection features include internal current limit and thermal shutdown with automatic recovery, plus a specified output disable characteristic when the device overheats. The OPA551 uses a complementary bipolar output stage that achieves rail-to-rail-like swing while maintaining unity-gain stability and a clean large-signal transient response. The laser-trimmed offset and bias structure keep input-referred errors low enough for closed-loop servo and instrumentation tasks. Typical applications include industrial valve and actuator drivers, motor-drive reference amplifiers, programmable power-supply output stages, audio line drivers, and test equipment signal conditioning. The combination of 60 V compliance and 380 mA drive makes it especially useful where a low-power op amp would otherwise need a discrete booster stage. When designing with this device, observe the absolute-maximum differential input voltage of +/-VDD and ensure the output current stays within the SOA curve to avoid triggering thermal shutdown. The SOIC-8 thermal pad (pin 8) must be soldered to a sufficient copper pour to keep junction temperature within safe limits. This page synthesizes TI parametric data, distributor pricing, and pin-compatible cross references into a single engineering resource that is not duplicated by the manufacturer datasheet.
OPA602AP - 6.5MHz Precision Difet Op Amp | Texas Instruments
The Texas Instruments OPA602AP is a high-speed precision Difet (dielectrically isolated FET) operational amplifier delivering 6.5 MHz bandwidth, 35 V/us slew rate, and a maximum offset voltage of +/-250 uV, housed in an 8-pin PDIP package. An operational amplifier is a high-gain voltage amplifier with differential inputs and a single-ended output, forming the foundational building block of the analog signal chain hierarchy: op amp -> amplifier IC -> analog IC -> semiconductor. Precision op amps such as the OPA602 combine the accuracy of a precision bipolar device with the speed of a FET-input design, making them a category distinct from general-purpose amplifiers. Key features include a maximum input bias current of +/-1 pA, enabled by the Difet JFET input stage; fast settling time to 0.01%; and unity-gain stability. According to the TI datasheet, the device is unity-gain stable and can drive capacitive loads up to 1500 pF, an unusually high capacitive-drive capability for a precision amplifier. Laser-trimmed input circuitry provides offset voltage and drift performance normally associated with precision bipolar op amps. The monolithic Difet (dielectrically isolated FET) construction is the core technology: dielectric isolation eliminates the parasitic junction capacitances of conventional JFET processes, allowing an unusual combination of high speed and accuracy in one die. Wide bandwidth and low distortion minimize AC errors, while the picoampere input bias current minimizes DC errors in high-impedance signal paths. Typical applications include precision instrumentation front ends, optoelectronics receivers, and sonar and ultrasound signal processing, where pulse fidelity and DC accuracy must coexist. Datasheet specifications are rated with a 1 kOhm resistor in parallel with a 500 pF load, so engineers should evaluate dynamic specs against actual load conditions. A key design consideration is supply headroom: the OPA602AP operates from +/-18 V supplies, and the Difet input stage performs best when inputs are kept within the linear common-mode range; output settling behavior should be verified in breadboard when driving heavy capacitive loads. This page synthesizes distributor pricing context, drop-in alternative analysis, pinout, and practical design notes beyond what the manufacturer datasheet alone provides.
OPA602AU - 6.5MHz Precision Difet Op Amp, SOIC-8 | TI
The Texas Instruments OPA602AU is a high-speed precision Difet (dielectrically isolated FET) operational amplifier delivering 6.5 MHz bandwidth, 35 V/us slew rate, and a maximum offset voltage of +/-250 uV with a maximum input bias current of +/-1 pA, housed in an 8-pin SOIC (D) package. A precision operational amplifier is a type of analog signal-conditioning IC that amplifies small differential voltages while adding minimal DC error. Within the amplifier hierarchy, the op amp sits above general amplifiers and below full instrumentation amplifiers, which integrate multiple op amps plus laser-trimmed resistor networks. Precision op amps prioritize offset, drift, and bias current over raw speed, and the OPA602 is unusual in combining both. Key features include unity-gain stability, fast settling to 0.01% for pulse and data-conversion applications, and low distortion across its 6.5 MHz bandwidth. The Difet process isolates FET input transistors with a dielectric layer, enabling high speed without the input leakage typical of junction-isolated FET processes. Technically, laser trimming of the input circuitry yields offset and drift performance normally associated with precision bipolar amplifiers, while the FET input keeps bias current at the picoampere level, ideal for high-impedance sources. TI rates all specifications with a 1 kOhm resistor in parallel with a 500 pF load, and the device easily drives capacitive loads up to 1500 pF. Typical applications include precision instrumentation, optoelectronics, and sonar/ultrasound signal chains, where fast settling and low DC error are simultaneously required. The OPA602AU is the -25C to +85C grade in the SOIC-8 package. Design consideration: as a decompensated-speed FET amplifier at unity gain, always verify phase margin with large capacitive loads and use the offset trim pins (1 and 5) carefully, since trim range exceeds offset magnitude. This page synthesizes distributor pricing, pin-compatible drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
OPA602AU/2K5 - 6.5MHz, 35V/us Precision Difet Op Amp | TI
The Texas Instruments OPA602AU/2K5 is a high-speed precision Difet (dielectrically isolated FET) operational amplifier delivering a 6.5MHz bandwidth, 35V/us slew rate, and a maximum offset voltage of +/-250uV in an 8-pin SOIC (D) package rated from -25C to +85C. An operational amplifier (op amp) is a high-gain differential voltage amplifier that forms the core building block of analog signal conditioning within the broader amplifier IC hierarchy. Precision op amps like the OPA602 minimize DC errors (offset, bias current, drift) while wideband types minimize AC errors; the OPA602 uniquely combines both classes using monolithic Difet construction, in which laser-trimmed input circuitry achieves offset and drift performance normally associated with precision bipolar amplifiers while retaining the ultra-low input bias current of a FET input stage. Key features include a +/-1pA maximum input bias current, fast settling to 0.01%, unity-gain stability, and the ability to drive capacitive loads up to 1500pF. According to the TI product page, all specifications are rated with a 1k resistor in parallel with a 500pF load, and wide bandwidth with low distortion minimizes dynamic errors in pulse and data conversion signal chains. The Difet process dielectrically isolates devices, giving an unusual combination of high speed and accuracy. High slew rate and fast settling allow accurate signal processing in pulse amplification, sample-hold buffering, DAC output conditioning, and optoelectronic receivers, where low input current protects high-impedance nodes from loading errors. Typical applications include precision instrumentation front ends, sonar and ultrasound signal chains, and photodiode/optoelectronic amplification. In each case, the 6.5MHz bandwidth and 35V/us slew rate preserve signal fidelity at speed while 1pA bias current preserves DC accuracy. Design consideration: the ±5V to ±18V supply range demands attention to supply decoupling; the OPA602 is stable at unity gain but output current capability (about 20mA class) should be respected when driving heavy loads. This page synthesizes distributor pricing, verified drop-in alternatives, pinout data, and practical design notes not consolidated in the manufacturer datasheet. Pricing is referenced as of 2026-09-13.
OPA602BP - 6.5MHz 35V/us Precision Difet Op Amp | Texas Instruments
The Texas Instruments OPA602BP is a high-speed precision Difet (dielectrically isolated FET) operational amplifier delivering a 6.5 MHz gain-bandwidth, 35 V/us slew rate, and a maximum input offset voltage of +/-250 uV in an 8-pin PDIP package. Its maximum input bias current of +/-1 pA and fast settling to 0.01% make it a rare combination of FET-input precision and wideband speed. An operational amplifier is a high-gain voltage amplifier with differential inputs, forming the foundation of the analog signal chain hierarchy: op amp -> amplifier IC -> analog IC -> semiconductor. Precision op amps like the OPA602 family minimize DC errors (offset, drift, bias current) while preserving AC performance, and the Difet process separates transistors with dielectric isolation to achieve speeds impossible in junction-isolated FET processes. Key differentiating features include laser-trimmed input circuitry for bipolar-grade offset and drift performance, unity-gain stability, and the ability to drive capacitive loads up to 1500 pF. Per the TI datasheet, all specifications are rated with a 1 kOhm resistor in parallel with a 500 pF load, and wide bandwidth with low distortion minimizes dynamic errors in data-conversion signal paths. The supply range of +/-5 V to +/-18 V supports both standard +/-15 V analog systems and lower-voltage precision designs. The OPA602BP grade offers the tightest offset specification within the family (OPA602AP is the looser A grade), suiting high-accuracy instrumentation front ends. Typical applications include precision instrumentation amplifiers, optoelectronic receiver front ends (photodiode transimpedance stages benefit from 1 pA bias current), and sonar/ultrasound signal conditioning where slew rate and settling accuracy are critical. Design consideration: with FET inputs, bias current doubles roughly every 10 C, so keep thermal gradients away from the input pins and use guard rings to preserve the picoampere-level input performance. This page synthesizes distributor pricing, drop-in alternative analysis, and practical design notes not found in the manufacturer datasheet.
OPA602SM - 6.5MHz Precision Difet Op Amp | TI Burr-Brown
The Texas Instruments (Burr-Brown) OPA602SM is a high-speed precision Difet (dielectrically isolated FET) operational amplifier delivering 6.5 MHz bandwidth, 35 V/us slew rate, and a maximum offset voltage of plus/minus 250 uV, housed in a round 8-pin TO-99 metal can package with military temperature grading. An operational amplifier is a high-gain differential voltage amplifier that, with external feedback networks, forms the core building block of analog signal conditioning: amplification, filtering, integration, buffering, and current-to-voltage conversion. The op amp hierarchy runs from general-purpose amplifiers through precision amplifiers to specialized high-speed precision parts like the OPA602SM, where both DC accuracy and AC speed are demanded simultaneously. Key features include a high slew rate of 35 V/us, low input bias current of plus/minus 1 pA maximum thanks to Difet input circuitry, fast settling to 0.01%, and unity-gain stability. The part easily drives capacitive loads up to 1500 pF, and all specifications are rated with a 1k resistor in parallel with a 500 pF load. Laser-trimmed input circuitry provides offset and drift performance normally associated with precision bipolar op amps, while the FET inputs eliminate bias-current errors in high-impedance circuits. The monolithic Difet construction (dielectrically isolated FET) provides an unusual combination of high speed and accuracy: dielectric isolation removes the junction capacitances that limit conventional JFET processes, allowing wide bandwidth and low distortion while preserving picoampere input currents. Wide bandwidth and low distortion minimize AC errors in precision signal chains. Typical applications include precision instrumentation, optoelectronics, and sonar/ultrasound systems, where the low bias current suits photodiode and high-impedance transducer interfaces, and the 6.5 MHz bandwidth supports fast pulse and carrier-based measurement. Design consideration: the TO-99 metal can requires careful ground-plane transitions when substituting surface-mount layouts, and offset trim pins should be used for sub-100 uV accuracy. This page synthesizes datasheet specifications, drop-in family alternatives, comparison tables, and practical design notes not found on distributor product pages.
OPA627 - Precision High-Speed JFET Op Amp | Texas Instruments
The OPA627 is a precision, high-speed JFET operational amplifier from Texas Instruments, offering a unique combination of low noise, low offset voltage, and high speed. It operates from a supply voltage of 9V to 36V (±4.5V to ±18V) and is available in 8-pin DIP, SOIC, and other packages. Key specifications include a slew rate of 55V/µs, a maximum offset voltage of 100µV, a maximum drift of 0.8µV/°C, and a low input bias current of 5pA. The OPA627 is unity-gain stable, making it versatile for a wide range of precision analog applications. An operational amplifier (op amp) is a high-gain voltage amplifier with differential inputs and a single-ended output. It is a fundamental building block in analog electronics, used in signal conditioning, filtering, and instrumentation. The OPA627 belongs to the class of precision op amps, which prioritize low offset voltage, low drift, and low noise. Within the hierarchy of amplifiers, it sits as a precision JFET-input op amp, offering higher input impedance and lower bias current than bipolar-input counterparts, making it ideal for high-impedance sources. The OPA627 features very low noise of 4.5nV/√Hz at 10kHz, fast settling time to 0.01%, and low input bias current of 5pA. Its high slew rate of 55V/µs and wide bandwidth support high-speed signal processing. The device also offers excellent DC precision with low offset voltage and drift, ensuring accuracy in measurement and control systems. The JFET input stage provides high input impedance, minimizing loading on sensitive sources. Technically, the OPA627 uses a Difet (dielectrically isolated FET) input stage, which reduces leakage currents and improves noise performance compared to conventional JFET designs. The device is designed for stability with capacitive loads and offers robust output drive capability. Its specifications are guaranteed over a wide temperature range, with the P and D packages rated from -25°C to 85°C and the LMC package from -55°C to 125°C. Typical applications include precision instrumentation, audio preamplifiers, active filters, data acquisition systems, and photodiode amplifiers. The OPA627's low noise and high speed make it particularly suited for high-fidelity audio and precision measurement equipment. Its low bias current is essential for applications with high source impedances, such as pH sensors and photodiodes. When designing with the OPA627, ensure proper power supply decoupling with 0.1µF capacitors close to the supply pins. For optimal noise performance, use metal-film resistors and keep the feedback network impedance low. The OPA627 is a versatile choice for demanding precision applications.
OPA627AU - 16MHz Precision DIFET Op Amp, 55V/us | TI
The Texas Instruments OPA627AU is a precision high-speed DIFET (dielectrically isolated FET) operational amplifier delivering 16MHz unity-gain bandwidth, 55V/us slew rate, and a maximum offset voltage drift of 0.8uV/C, housed in an 8-pin SOIC (D) package rated from -25C to +85C. A precision operational amplifier is a type of high-accuracy voltage amplifier within the broader amplifier IC family of analog semiconductors. Precision op amps combine low input offset voltage, low drift, and low bias current so that signal-chain accuracy is preserved over time and temperature, and they sit upstream of ADCs, filters, and output drivers in instrumentation, audio, and measurement systems. The OPA627AU differentiates itself with very low input bias current of 5pA maximum, enabled by the DIFET junction-isolated FET input process, fast settling to 0.01% in 550ns, and a low maximum offset voltage of 100uV. Unity-gain stability distinguishes it from its sibling OPA637, which is stable only at gain of 5 or greater. Architecturally, the DIFET process uses dielectric isolation to shrink junction capacitances, allowing the unusual combination of FET-input precision (picoampere bias current) with high-speed dynamics normally associated with bipolar op amps. The result is a single-amplifier solution that historically replaced discrete FET-input hybrid designs in precision signal paths. Typical applications include professional and high-end audiophile audio preamplifiers and I/V converters for DACs, precision photodiode transimpedance amplifiers where 5pA bias current minimizes offset error, and test-and-measurement front ends requiring fast 55V/us slewing with microvolt-level accuracy. For design, note the offset trim pins on the SOIC-8 footprint and ensure supply decoupling close to pins 4 and 7; the -25C minimum operating temperature is narrower than many precision op amps, so verify ambient range compliance. This page synthesizes distributor pricing, drop-in alternatives, cross-references, and practical design notes not found in the manufacturer datasheet.
OPA627AU/2K5 - 16MHz Precision JFET Op Amp 55V/us | TI
The Texas Instruments OPA627AU/2K5 is a precision, high-speed JFET-input operational amplifier delivering 16 MHz unity-gain bandwidth, 55 V/us slew rate, and a maximum offset voltage drift of 0.8 uV/C, housed in an 8-pin SOIC (D) package rated for -25C to +85C operation. A JFET-input operational amplifier is a voltage-feedback amplifier whose input stage uses junction field-effect transistors to achieve extremely low input bias current and high input impedance. Within the signal-chain hierarchy, it sits under the operational amplifier family, itself a core analog building block of amplifier ICs and precision analog front-end design. Key features include a very low offset voltage of 100 uV max, maximum drift of 0.8 uV/C, and input bias current as low as 5 pA max thanks to the DiFet (dielectrically isolated FET) input stage. The part is unity-gain stable, settling fast to 0.01% accuracy, and provides very low voltage noise at 10 kHz. Supply operation spans +-4.5 V to +-18 V, supporting both +-15 V industrial analog rails and +-5 V precision systems. Technically, the OPA6x7 family is fabricated on a high-speed dielectrically isolated (DiFet) process, which gives the OPA627 lower noise, lower offset, and higher speed than the earlier OPA111 while retaining picoampere input currents. The sibling OPA637 shares the die but is stable only at gains of 5 or greater, trading stability margins for wider bandwidth at high gain. Typical applications include precision data-acquisition front ends, photodiode transimpedance amplifiers, professional and audiophile audio preamplifiers, and test-and-measurement instrumentation where low offset drift and low bias current are decisive. A key design consideration: because the part is unity-gain stable at 16 MHz, layout with short feedback traces and solid ground planes is essential to avoid parasitic ringing; for gains of 5 or more, the faster OPA637 is often the better choice. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
OPA627BP - 16MHz Precision Difet Op-Amp | Texas Instruments
The Texas Instruments OPA627BP is a precision high-speed Difet (dielectrically isolated FET) operational amplifier delivering 16 MHz unity-gain bandwidth, 55 V/us slew rate, and 0.8 uV/C maximum offset-voltage drift, housed in an 8-pin plastic DIP (PDIP-8) package. A precision operational amplifier is an op-amp engineered to minimize DC error terms - input offset voltage, bias current, and drift - while maintaining usable AC performance. Within the signal-chain hierarchy, it sits between general-purpose amplifiers and instrumentation amplifiers, and the OPA627 belongs to TI's (originally Burr-Brown) Difet family, where dielectric isolation of JFETs dramatically reduces input capacitance and leakage compared to conventional junction-isolated processes. Key differentiating features include the combination of high speed (16 MHz, 55 V/us) with true precision DC accuracy, JFET input for extremely low bias current, and industrial temperature grade options. The 'B' grade suffix denotes tighter offset and drift limits; the 'P' suffix denotes the plastic 8-pin DIP package. Architecturally, the Difet process places a dielectric layer around FET structures, yielding low input capacitance and low input bias current that remain stable over temperature. This is why the OPA627 achieves sub-microvolt-per-degree drift together with wideband dynamics - a combination rarely met by CMOS or bipolar alternatives of its era. Typical applications include high-fidelity audio preamplifiers and headphone amplifiers, precision integrators and photodiode transimpedance stages, active filters, and data-acquisition front ends where both DC accuracy and 16 MHz bandwidth are required. Design consideration: to preserve stability, follow the datasheet layout guidance - keep feedback resistance values moderate and decouple supplies close to pins 4 and 7; the decompensated sibling OPA637 (minimum stable gain of 5) is not a unity-gain-stable substitute. This page synthesizes distributor pricing, drop-in alternative analysis, and practical design notes not consolidated in the manufacturer datasheet, with prices as of 2026-09-13.
OPA627SM - Precision JFET Op Amp 55V/us TO-99-8 | TI
The Texas Instruments OPA627SM is a precision, high-speed JFET-input operational amplifier delivering 55 V/us slew rate, 0.8 uV/C maximum offset drift, and 16 MHz unity-gain bandwidth in an 8-pin TO-99 metal can package rated for ±18 V (36 V) supplies. A low-dropout linear regulator is a voltage regulator; an operational amplifier is an analog signal-chain building block that amplifies the voltage difference between two inputs, sitting within the broader hierarchy of amplifier ICs inside precision analog front ends. The OPA627 family is fabricated on a high-speed dielectrically isolated (DI) process, which separates the JFET input stage from the output stage and enables a rare combination of precision DC accuracy and 55 V/us speed: maximum offset voltage of 100 uV, input bias current of a few picoamperes, and low noise of 4.5 nV/sqrt(Hz) at 1 kHz. Compared with the older OPA111, the OPA6x7 family offers lower noise, lower offset, and significantly higher speed. Key differentiating specifications include the 0.8 uV/C max drift (which eliminates calibration in precision gain stages), 55 V/us slew rate for wide-dynamic-range AC signals, and 16 MHz gain-bandwidth product with unity-gain stability. The SM grade denotes TI's premium grade in the metal can package with tightened limits for offset and drift. Typical applications include precision photo-diode and integrator amplifiers, DAC output I/V conversion, professional and high-end audio preamplifiers, and test-and-measurement signal conditioning where a fast-settling, low-offset JFET amplifier is required. Design consideration: as a JFET op amp, bias current doubles roughly every 10 C, so thermal management of surrounding circuitry matters at high accuracy targets; TI recommends a compensating network and proper decoupling per the datasheet. This page synthesizes distributor pricing, drop-in same-package alternatives, pinout data, and practical design notes not found in the manufacturer datasheet.
OPA631U - 80V 100V/us Single-Supply Op Amp | Texas Instruments
The Texas Instruments OPA631U is a low-power, single-supply operational amplifier featuring high bandwidth, a 100 V/us slew rate, 6 mA supply current, 6 nV/sqrt(Hz) input-voltage noise, operation to +10 V, and an 8-SOIC package. It is designed for instrumentation and signal-conditioning circuits that require fast response from a low-voltage supply. An operational amplifier is an analog integrated circuit that amplifies the voltage difference between two inputs while using negative feedback to set a stable closed-loop gain. The OPA631 belongs to the voltage-feedback operational-amplifier hierarchy, combining low input noise, wide bandwidth, single-supply operation, and rail-adjacent input capability. These characteristics place it between general-purpose amplifiers and higher-speed precision signal-conditioning devices. The verified manufacturer material highlights several performance features: high bandwidth, low 6 mA supply current, operation to +10 V, an input range that includes ground, approximately 4.8 V output swing from a +5 V supply, 100 V/us slew rate, and 6 nV/sqrt(Hz) low input-voltage noise. The zero-power disable function can reduce supply consumption when the amplifier is not needed, although the verified excerpts do not specify its exact shutdown-current value. OPA631U is a voltage-feedback amplifier with one amplifier circuit in an 8-SOIC package. Voltage-feedback topology responds directly to differential input voltage and is suitable for general-purpose gain, filtering, buffering, and instrumentation circuits. Its fast slew rate supports larger signal transitions, while low input voltage noise benefits applications in which source resistance and amplifier noise determine the usable signal floor. Typical uses include low-voltage sensor conditioning, audio and communication signal paths, analog measurement front ends, active filtering, and low-power instrumentation. When using it on a single supply, verify the selected gain, input range, output swing, load, and stability network against the complete manufacturer datasheet. Input and output behavior near the supply rails must be checked at the actual signal amplitude and frequency. For PCB implementation, place the feedback network, decoupling capacitors, and input components close to the amplifier pins. Use a ground plane and minimize parasitic capacitance on high-impedance nodes. This page combines the verified distributor identification, manufacturer-family excerpts, packaging information, and design guidance while identifying parameters that require confirmation from the complete datasheet. The practical design decision is whether the OPA631 speed and noise combination matches the required bandwidth without exceeding power or output-swing limits. Engineers should compare the complete electrical tables, pinout, and package details before production release, especially where input signals approach ground or the output approaches the supply rails.
OPA632U - 68MHz, 6mA Op Amp Single-Supply SOIC-8 | Texas Instruments
The Texas Instruments OPA632U is a SpeedPlus low-power, single-supply operational amplifier featuring 68 MHz bandwidth, 100 V/us slew rate, and 6 mA supply current in an 8-pin SOIC package. The device includes a zero-power disable mode and is designed for single-supply operation from +2.5 V to +10 V (or +/-5 V dual), with input common-mode range that includes ground and a 4.8 V output swing on a +5 V rail, making it suitable for ADC-driver and active-filter signal chains. An operational amplifier (op amp) is a high-gain DC-coupled electronic voltage amplifier with differential inputs and a single-ended output. Within the broader taxonomy, the OPA632 belongs to the voltage-feedback amplifier (VFA) family, which sits under the linear amplifier IC class, which in turn is a sub-category of analog signal-conditioning integrated circuits. The OPA632's distinguishing feature versus general-purpose op amps is its combination of wide bandwidth, high slew rate, and low input voltage noise (6 nV/sqrt(Hz)) in a power-efficient package. Key features of the OPA632U include 68 MHz unity-gain bandwidth, 100 V/us slew rate, 6 nV/sqrt(Hz) input-referenced voltage noise density, a low 6 mA quiescent current, and an integrated shutdown pin for power saving. The amplifier is unity-gain stable and provides a rail-to-rail output swing that approaches the positive rail and includes ground at the negative input range, easing single-supply signal chain design. Internally, the OPA632 uses a complementary bipolar architecture with a proprietary input stage that achieves low input bias current while preserving high bandwidth. The architecture delivers low distortion (typically 0.02 percent THD+N at 1 kHz into 600 ohm loads) and excellent DC precision, with a typical input offset voltage of +/-1 mV. The 8-pin SOIC (D) package is pin-compatible with industry-standard single op amp footprints, allowing drop-in replacement in existing designs. Typical applications of the OPA632U include high-fidelity audio ADC input buffers, active filter blocks, photodiode transimpedance front-ends, professional audio line drivers, and portable instrumentation. In each case, the combination of 68 MHz bandwidth, 6 mA supply current, and shutdown support makes the OPA632 a flexible analog building block for cost-sensitive but performance-critical designs. When designing with the OPA632U, observe the maximum supply rating of +12 V (or +/-6 V dual) and ensure output loading remains within the datasheet's safe operating area. Decouple the supply pin with a 0.1 uF ceramic capacitor placed within 5 mm of the IC, and use low-ESR bulk capacitance if the supply traces exceed 25 mm. The enable/disable pin should be tied to the positive supply through a 10 kohm resistor if the shutdown feature is not used, to prevent floating-input noise on that pin.
OPA634U - Wideband Single-Supply Op Amp | Texas Instruments
The Texas Instruments OPA634U is a wideband, single-supply operational amplifier from TI's SpeedPlus family, housed in an 8-pin SOIC package. It is a voltage-feedback amplifier with approximately 200 MHz bandwidth, 250 V/us slew rate, and 5.6 nV/sqrt(Hz) input voltage noise, designed for high-speed signal-chain applications on low-voltage rails. The OPA634U operates from a single +5V supply, swings 4.8V on +5V, and supports a ground-referenced input range that includes 0V, simplifying single-supply ADC interface designs. A wideband, single-supply operational amplifier is a type of analog integrated circuit that combines high small-signal bandwidth with the ability to operate from a single low-voltage rail (typically 3V or 5V), eliminating the need for symmetrical plus/minus supplies. Wideband amplifiers sit in the signal-chain hierarchy between general-purpose op-amps and dedicated RF gain blocks: they are faster than audio op-amps but lower in distortion and noise than full RF amplifiers. This makes them ideal for intermediate-frequency (IF) stages, video drivers, and high-speed transducer signal conditioning where rail-to-rail input and wide output swing are required simultaneously. Key features include 200 MHz unity-gain bandwidth, 250 V/us slew rate, 5.6 nV/sqrt(Hz) input voltage noise density, 80 mA output current capability, and disable-free continuous operation. The architecture is a current-feedback topology optimized for low quiescent current while preserving large-signal behavior, allowing the OPA634U to drive 150 ohm loads to within 1V of either rail. The SOIC-8 package provides a familiar pinout and wide compatibility with hand-soldering and standard SMT assembly lines. The internal design uses TI's high-speed complementary bipolar process, with a proprietary input stage that accepts signals from below ground to within 1.5V of the positive rail. This makes the OPA634U particularly effective as a single-to-differential buffer for high-speed ADCs, an active filter for IF stages, and a low-distribution pre-amplifier for video and instrumentation front-ends. Its wide bandwidth and high output drive also suit line-driver applications in industrial and broadcast video distribution. Typical applications include high-speed single-to-differential ADC drivers, IF/RF signal-chain buffers, video line drivers, active filter implementations, transducer signal conditioning, and portable test equipment signal paths. The wide bandwidth and high slew rate make it especially well suited to applications up to 10 MHz where pulse fidelity and settling time are critical. When designing with the OPA634U, take care to provide low-impedance source termination for current-feedback stability - the datasheet's recommended feedback resistor of 750 ohms at G=+2 should be respected. Decouple the +5V supply with a 0.1 uF ceramic placed within 5 mm of the supply pin and a 4.7 uF tantalum or ceramic bulk cap on the board-level rail. Avoid running the output trace near sensitive analog inputs to minimize crosstalk, and keep the inverting input trace short to preserve the high-frequency feedback loop. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
OPA635U - 100MHz High-Speed Amplifier | Texas Instruments
The Texas Instruments OPA635U is a single-circuit, voltage-feedback operational amplifier optimized for high-speed signal conditioning on supplies up to +10 V. Its three headline characteristics are 100 MHz gain-bandwidth product, 250 V/us slew rate, and 5.6 nV/sqrt(Hz) input-voltage noise, all supplied in an 8-pin SOIC package. The OPA635U also provides a shutdown function, an input range that includes ground, 4.8 V output swing from a +5 V supply, and output-current capability up to 80 mA. A high-speed operational amplifier is a voltage-feedback amplifier designed to amplify rapidly changing signals while maintaining useful gain, bandwidth, slew rate, and signal integrity. Within the broader hierarchy, an operational amplifier is an analog IC, and the OPA635U belongs to the high-speed voltage-feedback amplifier family. Its SpeedPlus architecture targets circuits requiring wide bandwidth and fast large-signal response without relying on a complex external compensation network. Key features include bandwidth extending to 100 MHz under the stated gain condition, 250 V/us slew rate, and 5.6 nV/sqrt(Hz) low input-voltage noise. The device supports operation to +10 V, can drive 80 mA, and can be placed in a shutdown state when the OPA635 version's power-disable function is used. Its input range extends to ground, making it relevant to single-supply systems that process signals near 0 V. The combination of high bandwidth and slew rate is useful in video and test equipment, high-speed filters, communications interfaces, active impedance conversion, and instrumentation buffers. Low input noise is especially relevant when amplifying small signals, while the 80 mA output-current capability provides drive for downstream stages and termination networks. Actual gain bandwidth, stability, and output swing depend on the selected gain, supply voltage, load, and feedback network. For +5 V operation, the verified data identifies a 4.8 V output swing, which leaves less headroom than the full supply rail and should be considered when designing receiver or driver interfaces. The 250 V/us slew rate supports fast transitions, but board parasitics, capacitive loading, and feedback-loop stability remain critical at high frequency. The SOIC package helps preserve the amplifier's high-frequency behavior compared with larger parasitic packages. A practical design should use short, controlled-impedance traces, a small, symmetric feedback network, and decoupling close to the supply pins. If the application does not need shutdown, the disable function should be tied to its inactive level according to the manufacturer datasheet. Confirm stability and output swing on the completed PCB because high-speed amplifier performance is sensitive to loading, grounding, and component placement. This page consolidates the verified OPA635U features, source links, package information, design cautions, and replacement-status assessment. It is intended to help engineers locate the datasheet, understand the core electrical limits, and plan a replacement without assuming that merely similar amplifier specifications guarantee drop-in compatibility.
OPA637AM - Precision High-Speed DiFET Op Amp | Texas Instruments
The Texas Instruments OPA637AM is a precision high-speed DiFET (dielectrically isolated FET) operational amplifier supplied in a TO-99-8 metal can package, featuring a maximum input offset voltage of 100 uV, a maximum offset drift of 0.8 uV/C, and a maximum input bias current of 5 pA. Unlike its unity-gain-stable sibling OPA627, the OPA637 is de-compensated and stable only at closed-loop gains of 5 or greater, which enables significantly higher bandwidth in high-gain configurations. An operational amplifier is a high-gain DC-coupled voltage amplifier with differential inputs and a single-ended output, forming the foundational building block of the analog signal chain hierarchy: op amp -> amplifier IC -> analog IC -> semiconductor. Precision high-speed op amps such as the OPA637 combine the low input bias current of a JFET-input (DiFET) process with the speed required for fast-settling data acquisition systems. Key differentiating features include very low noise at 10 kHz, a fast settling time to 0.01% accuracy, low offset voltage (100 uV max), and extremely low bias current (5 pA max) enabled by the DiFET process. The metal TO-99-8 can provides superior EMI shielding and thermal performance compared to plastic packages. The DiFET architecture uses dielectrically isolated FET input transistors on a bipolar process, achieving both precision DC accuracy and wideband AC performance. The de-compensated internal design removes the internal compensation capacitor overhead, delivering higher slew rate and gain-bandwidth at gains above 5. Typical applications include high-speed data acquisition, precision pulse amplification, photodiode transimpedance amplification at high gain, and professional audio and instrumentation signal chains where low noise and fast settling are both required. Design consideration: because the OPA637 is only stable at gains of 5 or above, do not use it in unity-gain buffer configurations; choose the pin-compatible OPA627AM instead for gain-of-1 applications. This page synthesizes distributor pricing, drop-in alternatives, design notes, and application guidance not found in the manufacturer datasheet.
OPA637AP - 80MHz Precision Difet Op Amp DIP-8 | Texas Instruments
The Texas Instruments OPA637AP is a precision high-speed Difet (dielectrically isolated FET) operational amplifier delivering 80 MHz unity-gain bandwidth and 135 V/us slew rate, supplied in an 8-pin PDIP package and operating from dual supplies of +/-4.5V to +/-18V. A high-speed operational amplifier is a voltage-feedback amplifier designed to combine wide bandwidth with DC precision, sitting within the hierarchy: op-amp -> precision amplifier -> analog signal conditioning IC -> semiconductor. Where general-purpose amplifiers trade speed for accuracy, precision high-speed parts like the OPA637 preserve both, enabling high-dynamic-range analog signal chains. Key features of the OPA637AP include a very low maximum offset voltage of 100 uV, a maximum offset drift of 0.8 uV/C, and a maximum input bias current of only 5 pA thanks to the Difet (dielectrically isolated FET) input process. The amplifier settles fast to 0.01% accuracy and is unity-gain bandwidth specified at 80 MHz. Unlike its sibling OPA627, which is unity-gain stable, the OPA637 is stable only at closed-loop gains of 5 or greater - the compensation scheme de-compensates the amplifier to achieve its higher bandwidth, which is why the 80 MHz figure exceeds the OPA627's. The Difet process uses dielectric isolation rather than junction isolation, sharply reducing input capacitance and leakage. This yields the picoampere-class bias current and low noise typically associated with JFET-input precision amplifiers while preserving the high slew rate needed for fast pulse and wideband AC signals. Typical applications include wideband data-acquisition front ends, fast pulse amplification in test and measurement instruments, photodiode transimpedance stages with high closed-loop gain, and active filters in precision instrumentation. A key design consideration: because the OPA637 requires a minimum closed-loop gain of 5 for stability, do not substitute it for the unity-gain-stable OPA627 in follower configurations. Verify noise-gain margins and use good high-frequency PCB layout with short feedback paths. This page synthesizes distributor pricing, drop-in alternatives, pinout data, and practical design notes not found in the manufacturer datasheet.
OPA637AU - Precision High-Speed Difet Op Amp | TI | Gain ≥5
The Texas Instruments OPA637AU is a precision high-speed Difet (dielectrically isolated FET) operational amplifier delivering 16 MHz bandwidth, 100 uV maximum input offset voltage, and 5 pA maximum input bias current in an 8-pin SOIC (D) package. Unlike its unity-gain-stable sibling OPA627, the OPA637 is decompensated and stable only at closed-loop gains of 5 or greater, which allows roughly twice the bandwidth and slew rate of the OPA627 in the same silicon. An operational amplifier is a high-gain differential voltage amplifier that forms the core building block of analog signal chains. Within the amplifier hierarchy, precision JFET-input and Difet op-amps occupy the segment between general-purpose bipolar amplifiers and ultra-fast current-feedback parts, combining very low input bias current with high speed and low noise. The Difet process uses dielectric isolation to reduce junction capacitances, enabling the OPA637's speed without sacrificing the picoampere-level bias current characteristic of JFET inputs. Key differentiating features include very low input voltage noise at 10 kHz, fast settling to 0.01% accuracy, maximum input offset voltage of 100 uV, and maximum offset drift of 0.8 uV/C. These parameters matter directly in precision measurement front ends, where offset error and drift accumulate as systematic error, and in wideband stages where noise sets the achievable dynamic range. Laser trimming of the input stage achieves the tight offset specification. Technically, the decompensated internal compensation capacitor is sized for a minimum noise gain of 5, trading phase margin at low gains for extended bandwidth and slew rate in high-gain configurations. This makes the part well suited to I/V conversion from photodiodes, gain-of-5 and higher instrumentation amplifier input stages, active filters, and DAC output buffering in high-resolution systems. Typical applications include precision data acquisition front ends, photodiode transimpedance amplifiers, professional audio equipment, and test and measurement instrumentation. The pA-level bias current preserves accuracy with high-impedance sources, while the 16 MHz-class bandwidth supports fast settling after transients. A critical design consideration: never use the OPA637 at closed-loop gains below 5, as it will oscillate; choose the pin-compatible OPA627 in the same SOIC-8 footprint for unity-gain applications. Proper supply decoupling with 0.1 uF ceramic capacitors at both rails is essential at these speeds. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, with verified data as of 2026-09-13.
OPA637AU/2K5 - 80MHz Precision Difet Op-Amp | TI
The Texas Instruments OPA637AU/2K5 is a precision high-speed Difet (dielectrically isolated JFET) operational amplifier delivering 80 MHz bandwidth and 135 V/µs slew rate in an 8-pin SOIC (D) package, supplied in tape-and-reel packaging with 2500 units per reel. A precision high-speed operational amplifier is a voltage-feedback amplifier that combines wide signal bandwidth with DC accuracy specifications normally reserved for precision instrumentation amplifiers. Within the amplifier hierarchy, the OPA637 sits in the precision JFET-input family: operational amplifier -> high-speed amplifier -> Difet precision op-amp -> signal conditioning IC. Its dielectrically isolated (Difet) JFET process achieves speed without sacrificing the low input bias current that JFET inputs provide. Key features include very low input noise at 10 kHz, fast settling to 0.01%, low offset voltage (100 µV max for the A grade), low drift (0.8 µV/°C max), and extremely low input bias current (5 pA max). The supply range spans ±4.5 V to ±18 V, allowing operation on standard ±15 V analog rails. Technically, the OPA637 is decompensated: unlike its unity-gain-stable sibling OPA627, the OPA637 is stable only in closed-loop gains of 5 or greater. This internal compensation trade-off is exactly what enables the 80 MHz bandwidth and 135 V/µs slew rate; at gain ≥5 it outpaces unity-gain-stable competitors while retaining Difet DC precision. Typical applications include photodiode transimpedance amplifiers with high closed-loop gain, fast precision data-acquisition front ends, video and broadband signal conditioning, and DAC output I/V conversion where both speed and sub-millivolt DC accuracy matter. Design consideration: verify every circuit using the OPA637 operates at closed-loop gain ≥5; substituting it directly for a unity-gain-stable op-amp (such as the OPA627 in the same package) will cause oscillation. This page synthesizes verified distributor pricing, drop-in alternatives within the OPA637 family, and design notes not found in the manufacturer datasheet.