OPA551PA - 60V High-Current Op Amp | Texas Instruments
MPN: OPA551PA ✓ AktifOPA551PA Ringkasan
An operational amplifier is an active analog device that amplifies the difference between two input voltages while providing high input impedance, low output impedance, and controlled gain and bandwidth. The OPA551PA belongs to the high-voltage power operational amplifier family, combining a 60 V maximum supply capability with current-drive capability that exceeds ordinary precision op amps. This makes it useful in telephone, audio, industrial control, and instrumentation systems where the load requires more current than a conventional small-signal amplifier can provide.
Key features include a wide 60 V supply range, typical output current of 380 mA, unity-gain stability, 3 MHz bandwidth, and a 15 V/µs slew rate. The amplifier is designed for a single-supply or dual-supply configuration, depending on the system requirements and the application circuit. Its high-current output stage makes it effective for driving capacitive loads, transformer inputs, audio transducers, and other loads that would overload a standard precision amplifier.
The OPA551PA uses a high-voltage, high-current internal architecture that is intended to maintain signal integrity while driving low-impedance loads. The 3 MHz bandwidth supports moderate-frequency signal paths rather than high-speed instrumentation or RF applications. Its 15 V/µs slew rate provides the output-current capability needed for larger-amplitude signals, while unity-gain stability allows direct voltage-follower use without compensation external components.
Typical applications include telephone line drivers, audio power amplifiers, headphone and transducer drivers, ultrasonic-driver circuits, industrial actuator interfaces, and high-voltage measurement systems. In audio applications, the amplifier can buffer a signal source and deliver current into a speaker or transformer load. In industrial systems, the 60 V capability supports higher-voltage signal chains while the 380 mA typical current capability handles demanding loads.
When designing around the OPA551PA, check the load current, output voltage swing, supply headroom, thermal dissipation, and stability requirements together. Place the decoupling capacitors close to the supply pins and keep the feedback path short to reduce oscillation risk. Confirm the maximum operating temperature, package tolerances, and output-current derating against the manufacturer datasheet before production release.
This page combines manufacturer specifications, package details, application guidance, and drop-in replacement information for engineers evaluating the OPA551PA in high-voltage amplifier and driver designs. It also provides practical comparison points for OPA551 family variants and compatible alternatives in the same 8-pin PDIP format.
Pilihan pengganti yang segera untuk OPA551PA — sama paket, pin-pin kompatibel. Bahagian paket yang berbeza memerlukan kerja ulang PCB diasingkan.
Varietas dalam siri ini
Model serupa yang kompatibel dengan pengganti yang segera OPA551PA (sama faktor bentuk dan kaki) — berbeza dalam Amplifier Type, Number of Circuits, Slew Rate, Supply Voltage Range, Unity-Gain Bandwidth.
OPA551PB
✅ Masuk Drop-In ⚠️ Spesifikasi Tidak Disahkan📋 Alternatif rujukan (tidak dalam katalog)
OPA551PC
✅ Masuk Drop-In ⚠️ Spesifikasi Tidak Disahkan📋 Alternatif rujukan (tidak dalam katalog)
OPA551PD
✅ Masuk Drop-In ⚠️ Spesifikasi Tidak Disahkan📋 Alternatif rujukan (tidak dalam katalog)
OPA604AP
✅ Masuk Drop-InHubungi untuk harga
Lihat Datasheet →OPA551PE
✅ Masuk Drop-In ⚠️ Spesifikasi Tidak Disahkan📋 Alternatif rujukan (tidak dalam katalog)
OPA551PA Penilaian maksimum & Ciri-ciri Elektrik
| Product Type | High-voltage, high-current operational amplifier |
| Supply Voltage Range | 60 V |
| Typical Output Current | 380 mA |
| High-Current Capability | 200 mA |
| Unity-Gain Bandwidth | 3 MHz |
| Slew Rate | 15 V/µs |
| Gain Configuration | Unity-gain stable |
| Number of Circuits | 1 |
| Amplifier Type | Standard (general purpose) amplifier |
| Package Type | 8-PDIP |
| Jenis Pemasangan | Through-hole |
| Input Voltage | 60 V maximum supply |
| Output Current | 380 mA typical |
| Bandwidth | 3 MHz |
| Slew Rate | 15 V/µs |
| Operating Voltage | 60 V |
Konfigurasi Pin OPA551PA
| Pin 1 | NC — Not connected (per datasheet) |
| Pin 2 | -IN — Inverting input |
| Pin 3 | +IN — Non-inverting input |
| Pin 4 | V- — Negative supply connection |
| Pin 5 | NC — Not connected (per datasheet) |
| Pin 6 | OUT — Amplifier output |
| Pin 7 | V+ — Positive supply connection |
| Pin 8 | NC — Not connected (per datasheet) |
Aplikasi Biasa
OPA551PA patut untuk 6 aplikasis: Telephone Line Driver, Audio Output and Transducer Driver, Industrial Actuator Interface, High-Voltage Measurement Buffer, Ultrasonic and Piezoelectric Driver, Power Buffer for External Amplifier Stage.
Telephone Line Driver
OPA551PA is well suited to telephone and communications line-driver circuits because its 60 V supply capability supports higher operating voltages than conventional precision op amps. The 380 mA typical output current gives the amplifier enough drive for transformer or line-interface loads while the 3 MHz bandwidth handles audio-band signals. Its 15 V/µs slew rate helps preserve large-signal behavior. Design the output path with the required protection components, confirm the load impedance, and verify thermal conditions for continuous operation.
Disebarkan
Audio Output and Transducer Driver
The OPA551PA can serve as an audio output buffer or transducer driver where the load requires substantially more current than a standard op amp can provide. Its 380 mA typical output current and 15 V/µs slew rate support stronger drive into speaker, headphone, or transducer networks, while the 3 MHz bandwidth exceeds many audio-band requirements. The amplifier should sit behind the appropriate output protection network, and the load, rail voltage, and continuous duty cycle must be checked against thermal and output-swing limits.
Disebarkan
Industrial Actuator Interface
OPA551PA is a candidate for industrial actuator and control interfaces that need high-voltage operation and stronger output drive than a conventional precision amplifier provides. The 60 V supply rating and 380 mA typical output current allow the device to sit between low-level control circuitry and higher-power transducers, relays, or external amplifier stages. Its 3 MHz bandwidth is sufficient for many low-to-moderate frequency control signals, but output-current limits, inductive-load protection, and thermal dissipation must be designed around the connected load.
Disebarkan
High-Voltage Measurement Buffer
OPA551PA can buffer moderate-bandwidth signals in high-voltage measurement systems where the source impedance or downstream load is too demanding for a standard precision op amp. Its 60 V supply capability supports elevated operating ranges, and the 380 mA typical output current reduces loading effects when driving a following stage or measurement front end. The 3 MHz bandwidth and 15 V/µs slew rate are appropriate for many process-control signals. Input bias, offset, noise, common-mode range, and accuracy requirements should be verified for precision measurement use.
Disebarkan
Ultrasonic and Piezoelectric Driver
OPA551PA can drive piezoelectric or ultrasonic transducers in moderate-frequency circuits because it combines a 15 V/µs slew rate with high output-current capability. The 3 MHz unity-gain bandwidth provides more than enough bandwidth for many ultrasonic operating frequencies, while the 380 mA typical current supports capacitive transducer loads better than a conventional small-signal amplifier. The driver should include current limiting and clamp protection, and the transducer's capacitance, voltage waveform, and mechanical resonance must be considered during layout and testing.
Disebarkan
Power Buffer for External Amplifier Stage
OPA551PA is useful as a high-current buffer in front of a larger power amplifier when the signal source cannot drive the final stage directly. Its unity-gain stability supports voltage-follower use, and the 380 mA typical output current provides more drive than ordinary precision amplifiers. The 60 V capability allows the buffer to operate in higher-voltage analog systems, but the external amplifier's input impedance, stability network, and required current must be matched. Short feedback routing and careful decoupling are essential for clean large-signal operation.
Disebarkan
Ringkasan Produk Disebarkan
Data referensi kejuruteraan untuk OPA551PA — perbandingan, panduan rancangan, dan maklumat kesediaan
Panduan Pilihan
Perbandingan dengan Gantian
| Parametr | Produk Ini | OPA551PB | OPA551PC | OPA551PD | OPA604AP | OPA551PE |
|---|---|---|---|---|---|---|
| Package | 8-PDIP | 8-PDIP | 8-PDIP | 8-PDIP | 8-PDIP | 8-PDIP |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Number of Circuits | 1 | 1 | 1 | 1 | 1 | 1 |
| Mounting Type | Through-hole | Through-hole | Through-hole | Through-hole | Through-hole | Through-hole |
| Primary Application | High-voltage, high-current driver and buffer | High-voltage, high-current driver and buffer | High-voltage, high-current driver and buffer | High-voltage, high-current driver and buffer | High-voltage amplifier | High-voltage, high-current driver and buffer |
Penyeberangsung Jelas
- High-voltage operation with substantially higher output drive (vsOPA604AP)
- Direct high-current buffering in a through-hole footprint (vsOPA551UA)
- Unity-gain stability supports simple buffer configurations (vsOPA551PB)
- Moderate-bandwidth performance tailored to audio and transducer drive (vsOPA551PC)
Catatan Desain
Estimated: power dissipation in the output stage depends on supply voltage, output voltage, load current, and the amplifier's conduction model. At a 60 V supply, a 380 mA continuous load can generate substantial heat, so calculate worst-case dissipation, verify the package temperature rating, and use the thermal information in the manufacturer datasheet. Keep the output stage within its continuous-current and operating-temperature limits.
Use the pin-description table in the manufacturer datasheet when assigning PCB tracks. Keep the feedback connection short, place supply bypass capacitors close to V+ and V-, and provide a low-impedance ground return. High-current output routing should use adequate copper width, and the output trace should be isolated from sensitive input and feedback nodes to reduce oscillation and crosstalk.
Do not treat the 380 mA typical output-current figure as a guarantee for every supply, load, and temperature condition. Check output-voltage swing, continuous and peak current limits, supply headroom, capacitive-load stability, and thermal derating. For inductive or capacitive transducers, add appropriate clamp or isolation protection and confirm that the circuit does not exceed the absolute maximum ratings.
The 3 MHz bandwidth and 15 V/µs slew rate make the OPA551PA suitable for moderate-frequency drive signals, but large-signal operation can expose stability and grounding problems. Keep the feedback loop compact, use low-inductance supply connections, and test with the actual load cable and transducer attached. Any substitute must preserve the pin functions, supply range, current drive, and compensation behavior of the original circuit.
Maklumat Kesediaan
The OPA551PA is a single-circuit high-voltage, high-current operational amplifier in an 8-PDIP package. Compliance attributes beyond the identified product information require confirmation from the manufacturer product page or current quality documentation.
