OPA637AP - 80MHz Precision Difet Op Amp DIP-8 | Texas Instruments
N.º de pieza: OPA637AP ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $1 | $1,00 |
OPA637AP Descripción general
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.
Alternativas directas para OPA637AP — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con OPA637AP (mismo factor de forma y huella) — difiere en Input Type, Package, Stability.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
No hay alternativas directas disponibles para este producto.
Solicitar alternativasOPA637AP Valores máximos y características eléctricas
| Amplifier Type | Precision High-Speed Difet Operational Amplifier |
| Number of Channels | 1 |
| Gain Bandwidth Product | 80 MHz |
| Slew Rate | 135 V/us |
| Input Offset Voltage (max) | 100 uV |
| Offset Voltage Drift (max) | 0.8 uV/C |
| Input Bias Current (max) | 5 pA |
| Settling Time to 0.01% | Fast settling (see manufacturer datasheet for typ value) |
| Supply Voltage Range | +/-4.5 V to +/-18 V |
| Stability | Stable in closed-loop gains of 5 or greater |
| Input Type | Difet (dielectrically isolated FET) |
| Encapsulado | 8-PDIP |
| Tipo de montaje | Through Hole |
| Estado RoHS | unknown |
Configuración de pines de OPA637AP
| Pin 1 | TRIM A — Offset voltage trim terminal A (connect to trim potentiometer) |
| Pin 2 | -IN — Inverting input |
| Pin 3 | +IN — Non-inverting input |
| Pin 4 | V- — Negative supply |
| Pin 5 | NC — Not connected (per datasheet) |
| Pin 6 | OUT — Output |
| Pin 7 | V+ — Positive supply |
| Pin 8 | TRIM B — Offset voltage trim terminal B (connect to trim potentiometer) |
Aplicaciones típicas
OPA637AP es adecuado para 3 aplicacións: Acondicionamiento de señales, Adquisición de datos, Procesamiento de audio.
Acondicionamiento de señales
Amplificación y filtrado de señales de sensores usando OPA637AP.
Adquisición de datos
Conversión de señales analógicas para procesamiento digital con OPA637AP.
Procesamiento de audio
Amplificación y procesamiento de señales de audio con OPA637AP.
No hay preguntas frecuentes disponibles para este producto.
Datos de referencia de ingeniería para OPA637AP — comparación, orientación de diseño e información de cumplimiento.
Información de cumplimiento
Compliance data not present in provided web data; verify on the TI product page before procurement.
