OPA637AP - 80MHz Precision Difet Op Amp DIP-8 | Texas Instruments
MPN: OPA637AP ✓ AktifOPA637AP Genel Bakış
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.
Drop-in alternatifler için OPA637AP — aynı paket, pin-başına uyumlu. PCB yeniden montajı gerektiren farklı paket bileşenleri dışlanmıştır.
Bu Serideki Variantlar
Yedek parça uyumlu olan aynı serideki modeller OPA637AP (aynı form faktörü ve ayağa oturma) — farklı olan Input Type, Package, Stability.
Bu ürüne yer değiştirme seçenekleri mevcut değil.
Alternatifleri Talep EdinOPA637AP Maksimum Değerlendirmeler & Elektriksel Özellikler
| 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) |
| Paket | 8-PDIP |
| Montaj Türü | Through Hole |
| RoHS Durumu | unknown |
OPA637AP Pin Yapısı
| 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) |
Tipik Uygulamalar
OPA637AP için uygundur 3 uygulamas: Sinyal İşleme, Veri Toplama, Ses İşleme.
Sinyal İşleme
OPA637AP kullanarak sensör sinyallerini güçlendirme ve filtreleme.
Veri Toplama
OPA637AP ile analitik sinyallerin dijital işleme için dönüştürülmesi.
Ses İşleme
OPA637AP ile ses sinyalinin güçlendirilmesi ve işlenmesi.
Bu ürüne FAQ mevcut değil.
Mühendislik referans verileri: OPA637AP — karşılaştırma, tasarım rehberi ve uyumluluk bilgileri.
Uyumluluk Bilgisi
Compliance data not present in provided web data; verify on the TI product page before procurement.
