OPA637AP - 80MHz Precision Difet Op Amp DIP-8 | Texas Instruments
MPN: OPA637AP ✓ AktifOPA637AP Ringkasan
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.
Alternatif penggantian untuk OPA637AP — paket yang sama, pin-pada-pin kompatibel. Bagian paket yang berbeda memerlukan kerja ulang PCB diabaikan.
Variasi di dalam seri ini
Model-series yang sama yang kompatibel dengan penggantian OPA637AP (sama faktor bentuk dan footprint) — berbeda di dalam Input Type, Package, Stability.
Tidak ada alternatif pengganti yang tersedia untuk produk ini.
Permintaan AlternatifOPA637AP Rating Maksimal & Karakteristik Listrik
| 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 |
| Tipe Mounting | Through Hole |
| Status RoHS | unknown |
Konfigurasi Pin OPA637AP
| Pin produk 1 | TRIM A — Offset voltage trim terminal A (connect to trim potentiometer) |
| Pin produk 2 | -IN — Inverting input |
| Pin produk 3 | +IN — Non-inverting input |
| Pin produk 4 | V- — Negative supply |
| Pin produk 5 | NC — Not connected (per datasheet) |
| Pin produk 6 | OUT — Output |
| Pin produk 7 | V+ — Positive supply |
| Pin produk 8 | TRIM B — Offset voltage trim terminal B (connect to trim potentiometer) |
Aplikasi Umum
OPA637AP cocok untuk 3 aplikasis: Peralatan Sinyal, Pengumpulan Data, Proses Audio.
Peralatan Sinyal
Memperkuat dan menyaring sinyal sensor menggunakan OPA637AP.
Pengumpulan Data
Merubah sinyal analog untuk pemrosesan digital dengan OPA637AP.
Proses Audio
Perkuatan dan pengolahan sinyal audio dengan OPA637AP.
Tidak ada FAQ tersedia untuk produk ini.
Data referensi engineering untuk OPA637AP — pembandingan, panduan desain, dan informasi konformitas.
Informasi Konformitas
Compliance data not present in provided web data; verify on the TI product page before procurement.
