OPA637AP - 80MHz Precision Difet Op Amp DIP-8 | Texas Instruments
N.º da peça: OPA637AP ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $1 | $1,00 |
OPA637AP Visão geral
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 drop-in para OPA637AP — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com OPA637AP (mesmo formato e footprint) — diferindo em Input Type, Package, Stability.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
Nenhuma alternativa drop-in disponível para este produto.
Solicitar alternativasOPA637AP Classificações máximas e características elétricas
| 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) |
| Encapsulamento | 8-PDIP |
| Tipo de montagem | Through Hole |
| Status RoHS | unknown |
Configuração de pinos do OPA637AP
| Pino 1 | TRIM A — Offset voltage trim terminal A (connect to trim potentiometer) |
| Pino 2 | -IN — Inverting input |
| Pino 3 | +IN — Non-inverting input |
| Pino 4 | V- — Negative supply |
| Pino 5 | NC — Not connected (per datasheet) |
| Pino 6 | OUT — Output |
| Pino 7 | V+ — Positive supply |
| Pino 8 | TRIM B — Offset voltage trim terminal B (connect to trim potentiometer) |
Aplicações típicas
OPA637AP é adequado para 3 aplicaçãos: Condicionamento de sinal, Aquisição de dados, Processamento de áudio.
Condicionamento de sinal
Amplificação e filtragem de sinais de sensores usando OPA637AP.
Aquisição de dados
Conversão de sinais analógicos para processamento digital com OPA637AP.
Processamento de áudio
Amplificação e processamento de sinais de áudio com OPA637AP.
Nenhuma FAQ disponível para este produto.
Dados de referência de engenharia para OPA637AP — comparação, orientação de projeto e informações de conformidade.
Informações de conformidade
Compliance data not present in provided web data; verify on the TI product page before procurement.
