OPA843ID - 800 MHz Wideband Operational Amplifier | Texas Instruments
MPN: OPA843ID ✓ NakahandaOPA843ID Ulas
A voltage-feedback operational amplifier is a feedback-controlled amplifier that uses the error at its inverting input to correct the output. The OPA843 belongs to the broader operational-amplifier hierarchy, which includes instrumentation amplifiers, buffer amplifiers, comparators, and other analog signal-conditioning ICs. Its medium closed-loop gain range and wide operating bandwidth make it particularly useful when a design needs accurate high-frequency amplification rather than only low-frequency precision.
The primary performance characteristics include an 800 MHz gain-bandwidth product and a 1000 V/us slew rate. These figures allow the amplifier to preserve large-amplitude signals encountered in instrumentation and RF-adjacent signal chains. The device operates from 10 V to 12 V, giving designers sufficient headroom for wide-swing output stages while supporting a dual-supply implementation centered at zero volts. The specified operating-temperature range extends from -40 °C to +85 °C for industrial-temperature applications.
OPA843ID is configured as a voltage-feedback amplifier rather than a current-feedback amplifier. This topology supports conventional resistive feedback networks and is familiar to engineers designing gain blocks, active filters, impedance drivers, and signal conditioners. Because the package is an 8-pin SOIC, PCB footprint reuse is straightforward when a new amplifier has the same supply arrangement, pin functions, and feedback topology. Pin assignments and support-network details should nevertheless be checked against the manufacturer datasheet before production release.
Typical applications include broadband instrumentation, communications receivers, analog-to-digital converter input interfaces, active filters, pulse-shape circuits, and test equipment. In these applications, the 800 MHz bandwidth handles fast transitions while the 1000 V/us slew rate limits slew-related distortion. When driving cables, analog-to-digital converters, or other finite-impedance loads, the output-current capability and output-voltage swing should be checked against the actual load and supply conditions.
The main design trade-off is supply and output-stage headroom. A 10 V to 12 V supply supports high output swing, but it is not interchangeable with a modern low-voltage, rail-to-rail amplifier. Decoupling capacitors, feedback resistor selection, source and load impedances, and stability conditions determine practical bandwidth. Use the manufacturer datasheet and its evaluated application circuits to select compensation and confirm performance across the required gain and frequency range.
This page combines the verified manufacturer and distributor product information with engineering-focused comparisons, application guidance, package details, and design notes. It highlights where the OPA843ID's bandwidth, slew rate, supply range, and low-distortion voltage-feedback architecture are most useful, while also identifying the information that must be checked in the datasheet before a drop-in PCB or production design is approved.
Mga alternatibo na pwedeng ilagay na OPA843ID — parehas na package, pin-to-pin na katugmang. Hindi kasama ang mga bahagi ng iba't-ibang package na nangangailangan ng pagpapaayos ng PCB.
OPA843IDG4
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
OPA843ID Mga Pinakamataas na Rating at Electrical Characteristics
| Amplifier Type | Voltage-feedback operational amplifier |
| Number of Circuits | 1 circuit |
| Gain-Bandwidth Product | 800 MHz |
| Slew Rate | 1000 V/us |
| Supply Voltage Range | 10 V to 12 V |
| Packhaging | 8-pin SOIC |
| Bilang ng Pin | 8 pins |
| Hanay ng Temperature na Operasyon | -40 °C to +85 °C |
| Uri ng Pagpapasok | Surface mount |
| Product Family | OPA843 |
| Noise Distortion Characteristics | Low distortion |
| Signal Type | Wideband analog signal |
| Type ng Output | Single amplifier |
Gabay sa Pin Configuration ng OPA843ID 8-pin soic
Pin configuration para sa OPA843ID (8-pin soic package). Ang analog component na ito ay may input, output, at power supply pins. Sumangguni sa datasheet ng manufacturer para sa offset null, compensation, at enable pin configurations. Perpekto para sa signal conditioning at amplifier circuits.
Wala ng detalyadong pinout data na magagamit para sa OPA843ID.
Sumangguni sa datasheet para sa buong pin configuration.
Tipikal na mga Gamit
OPA843ID ay nararapat para sa 6 aplikasyons: High-Speed ADC Signal Conditioning, Communications Receiver Signal Chain, Active Bandpass Filtering, Broadband Instrumentation, Video and Pulse Signal Conditioning, Test and Measurement Signal Driver.
High-Speed ADC Signal Conditioning
The OPA843ID fits high-speed ADC front ends that require more bandwidth and slew rate than a general-purpose operational amplifier can provide. Its 800 MHz gain-bandwidth product supports wide-band signal paths, while the 1000 V/us slew rate helps preserve large-amplitude transitions with low slew-related distortion. In a typical circuit, the amplifier provides closed-loop gain before driving the converter input. The ADC’s sampling network, input capacitance, and settling requirements must be included in the design, because the amplifier’s rated bandwidth alone does not guarantee complete system accuracy. The 10 V to 12 V supply range and low-distortion voltage-feedback topology make OPA843ID particularly appropriate for instrumentation-grade converter interfaces.
Inirekomenda
Communications Receiver Signal Chain
OPA843ID is suitable for intermediate-frequency and wideband communications signal-chain stages where low distortion and fast response are required. The 800 MHz gain-bandwidth product allows the device to amplify signals at frequencies that would be attenuated by lower-bandwidth amplifiers, and the 1000 V/us slew rate improves large-signal behavior when amplitude changes rapidly. A voltage-feedback configuration can use conventional resistive gain networks, making the part convenient for fixed-gain blocks, driver interfaces, and active filtering. Designers should verify output swing, output-current demand, and stability into the actual receiver load while operating within the specified 10 V to 12 V supply range.
Inirekomenda
Active Bandpass Filtering
The OPA843ID can serve as the active element in wideband filters and frequency-selective signal-conditioning networks. Its 800 MHz gain-bandwidth product gives the design more open-loop bandwidth than required for moderate closed-loop gains, while the 1000 V/us slew rate helps maintain low distortion for signals with significant amplitude and frequency content. The voltage-feedback architecture is compatible with conventional R-C feedback networks used for active filters. Component tolerances, amplifier noise, parasitic capacitance, and the datasheet’s recommended feedback values determine the actual filter response. Validate gain peaking and stability over the complete target frequency band rather than relying only on nominal gain-bandwidth product.
Inirekomenda
Broadband Instrumentation
OPA843ID is appropriate for broadband measurement instruments that need to amplify sensor, probe, or test-point signals without severe bandwidth or slew limitation. The 800 MHz gain-bandwidth product supports fast measurement waveforms, and the 1000 V/us slew rate reduces amplitude-dependent distortion when signals change rapidly. A practical front end may use the amplifier for fixed or adjustable closed-loop gain ahead of an ADC or data converter. The engineer should include probe capacitance, cable loading, source impedance, and output loading in the stability analysis. Because the specified supply range is 10 V to 12 V, the instrument’s power architecture must provide adequate headroom for the required output swing.
Inirekomenda
Video and Pulse Signal Conditioning
OPA843ID can be used in video or pulse-processing paths that require rapid slew response and low distortion. The 1000 V/us slew rate is important when preserving edge transitions, while the 800 MHz gain-bandwidth product accommodates wideband content around those transitions. In a pulse-shaper or video gain stage, the amplifier’s voltage-feedback topology permits standard resistive feedback and gain-setting networks. Edge quality still depends on output-voltage headroom, load capacitance, and the impedance presented by the next stage. Verify these operating conditions using the manufacturer’s electrical characteristics and typical applications, especially when using a single 12 V supply or driving long interconnects.
Inirekomenda
Test and Measurement Signal Driver
OPA843ID fits broadband test equipment that must generate or condition fast signals while maintaining low amplitude distortion. Its 800 MHz gain-bandwidth product supports high-frequency gain blocks, and its 1000 V/us slew rate allows large-amplitude square and pulse signals to transition with reduced slew error. The amplifier may be used in an attenuator, level-shifting stage, or output-driver topology, depending on the required voltage and current. Accurate design requires checking output-current capability, output swing, load impedance, and stability with the selected feedback network. The 10 V to 12 V operating range provides useful headroom for bipolar-style laboratory signal paths.
Inirekomenda
Buod ng mga Inirekomendang Produkto
Impormasyon ng Talumpati sa Engineering for OPA843ID — ikabit, gabay sa disenyo, at impormasyon ng pagsunod sa kautusan.
Paunawang Hanapin
Ikabit sa Mga Alternatibo
| Parametro | Ito ang Producto | OPA843IDG4 |
|---|---|---|
| Package | 8-pin SOIC | 8-pin SOIC |
| Brand | Texas Instruments | Texas Instruments |
| Amplifier Type | Voltage-feedback operational amplifier | Wideband, low-distortion voltage-feedback operational amplifier |
| Number of Circuits | 1 circuit | 1 circuit |
Pangunahing mga Pagkakaiba
- High-speed voltage-feedback performance (kumpara saOPA843IDG4)
- Single-amplifier integration (kumpara saOPA843IDG4)
- Wideband low-distortion positioning (kumpara saOPA843IDG4)
Talaan ng Disenyo
Place the input, output, feedback, and supply-decoupling connections according to the manufacturer’s recommended layout. Keep feedback resistors close to the inverting input and minimize trace area around high-impedance nodes. Because the OPA843ID is an 800 MHz device, long PCB traces, test pads, and interconnect stubs can introduce parasitic capacitance that alters gain, noise, and stability. Use a solid ground plane, short supply paths, and local bypass capacitors selected from the datasheet’s recommended values.
Use a supply within the specified 10 V to 12 V range and check output swing against the actual load before assigning signal headroom. Estimated dissipation is calculated as P = (VIN - VOUT) × IOUT; for example, a 12 V supply, 5 V output, and 20 mA load gives an estimated 140 mW, using 12 V, 5 V, and 0.020 A as the input values. Add amplifier quiescent current and account for output-current limits when designing the supply and thermal margin.
Do not assume that the 800 MHz gain-bandwidth product is the usable closed-loop bandwidth at every gain, load, or supply condition. Noise gain, parasitic capacitance, output loading, and feedback values can reduce stability or cause peaking. Check the manufacturer’s gain-bandwidth and stability guidance, use the supported feedback topology, and evaluate the complete amplifier with its intended source and load. Avoid substituting a low-voltage or rail-to-rail amplifier without verifying supply range, input range, output swing, slew rate, and pinout.
Impormasyon ng Pagsunod sa Kautusan
The OPA843ID ordering suffix G4 commonly denotes a lead-free finish, but the product information used for this record does not explicitly state the individual compliance declarations. Confirm RoHS, REACH, AEC-Q100, halogen-free, and conflict-minerals status in the manufacturer product documentation before making a compliance claim.