OPA627SM - Precision JFET Op Amp 55V/us TO-99-8 | TI
부품 번호: OPA627SM ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $170.2 | $170.20 |
| 10 | $165 | $1,650.00 |
| 100 | $158 | $15,800.00 |
| 500 | $152 | $76,000.00 |
| 1,000 | $145 | $145,000.00 |
OPA627SM 개요
Key differentiating specifications include the 0.8 uV/C max drift (which eliminates calibration in precision gain stages), 55 V/us slew rate for wide-dynamic-range AC signals, and 16 MHz gain-bandwidth product with unity-gain stability. The SM grade denotes TI's premium grade in the metal can package with tightened limits for offset and drift.
Typical applications include precision photo-diode and integrator amplifiers, DAC output I/V conversion, professional and high-end audio preamplifiers, and test-and-measurement signal conditioning where a fast-settling, low-offset JFET amplifier is required.
Design consideration: as a JFET op amp, bias current doubles roughly every 10 C, so thermal management of surrounding circuitry matters at high accuracy targets; TI recommends a compensating network and proper decoupling per the datasheet.
This page synthesizes distributor pricing, drop-in same-package alternatives, pinout data, and practical design notes not found in the manufacturer datasheet.
드롭인 대체품: OPA627SM — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: OPA627SM (동일 폼 팩터 및 풋프린트) — 차이점: Package, Amplifier Type, Slew Rate, Supply Voltage Range, Input Bias Current.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
OPA627BP
✅ 드롭인✓ 재고 있음
$21.3 / 개
데이터시트 보기 →OPA637AM
✅ 드롭인 ⚠️ 사양 미검증✓ 재고 있음
$31.34 / 개
데이터시트 보기 →OPA637BP
✅ 드롭인 ⚠️ 사양 미검증✓ 재고 있음
$11.8 / 개
데이터시트 보기 →OPA627BM
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
OPA602SM
✅ 드롭인 ⚠️ 사양 미검증✓ 재고 있음
가격 문의
데이터시트 보기 →OPA627SM 최대 정격 & 전기적 특성
| Amplifier Type | Precision, high-speed JFET operational amplifier |
| Number of Channels | 1 |
| Slew Rate | 55 V/us |
| Gain Bandwidth Product | 16 MHz |
| Offset Drift | 0.8 uV/C max |
| Supply Voltage Range | ±4.5 V to ±18 V (36 V total) |
| Input Bias Current | 5 pA typ (JFET input) |
| Input Voltage Noise | 4.5 nV/sqrt(Hz) at 1 kHz |
| Unity-Gain Stable | Yes |
| 패키지 | TO-99-8 metal can |
| 실장 유형 | Through Hole |
| 동작 온도 | -55C to +125C (military/M-grade range) |
| Packaging | Tube |
OPA627SM 핀 구성
| 핀 1 | NC — Not connected (per datasheet) |
| 핀 2 | -IN — Inverting input |
| 핀 3 | +IN — Non-inverting input |
| 핀 4 | V- — Negative supply |
| 핀 5 | NC — Not connected (per datasheet) |
| 핀 6 | OUT — Amplifier output |
| 핀 7 | NC — Not connected (per datasheet) |
| 핀 8 | V+ — Positive supply |
일반적인 애플리케이션
OPA627SM 적합 용도: 6 애플리케이션s: Photodiode Amplifier / Transimpedance Front End, High-End Audio Preamplifier and I/V Conversion, Precision DAC Output I/V Converter, Test and Measurement Signal Conditioning, Integrator and Precision Summing Circuits, Active Filters and Precision Oscillators.
Photodiode Amplifier / Transimpedance Front End
The OPA627SM's JFET input stage draws only picoamperes of bias current, so it introduces negligible error when converting photodiode currents into voltages in a transimpedance amplifier. The 0.8 uV/C max offset drift keeps DC accuracy stable across temperature without calibration, while 16 MHz gain-bandwidth supports megahertz-class photodiode zero dynamics for fast optical receivers. In a typical TIA, the feedback resistor (100 kohm to 10 Mohm) sets transimpedance gain, and a small feedback capacitor compensates the diode capacitance pole; the op amp's low input capacitance and high phase margin make the compensation straightforward. The hermetic TO-99 metal can further shields the summing node from ambient leakage, a key advantage over plastic packages in high-impedance nodes.
추천
High-End Audio Preamplifier and I/V Conversion
In professional and audiophile signal chains, the OPA627SM is a benchmark choice for gain stages and DAC output current-to-voltage conversion. Its 4.5 nV/sqrt(Hz) input noise and 55 V/us slew rate ensure that distortion artifacts stay below audibility even at high output levels, while the JFET picoampere bias current prevents DC offsets across volume-control networks. Operating from ±15 V rails, the amplifier provides wide signal swing into 600 ohm loads when paired with a BUF634 buffer inside the feedback loop, which extends output current to 250 mA while preserving the op amp's precision characteristics. Community comparisons against modern parts such as the OPA1622 confirm the OPA627 remains competitive for non-inverting preamp stages at moderate gains.
추천
Precision DAC Output I/V Converter
Precision and audio DACs with current outputs benefit from the OPA627SM's combination of low offset and high speed at the I/V node. The amplifier holds the DAC output at virtual ground, so DAC linearity errors from output-voltage compliance are eliminated; the 0.8 uV/C drift ensures the virtual ground stays accurate over temperature, and the 55 V/us slew rate handles full-scale code transitions without slewing-induced distortion. The 16 MHz bandwidth comfortably supports conversion settling to 16-20 bit levels at audio and instrumentation sample rates. Pairing with a deglitching filter and a BUF634 output stage yields a complete, low-noise reconstruction output capable of driving filters and cables.
추천
Test and Measurement Signal Conditioning
Bench instruments, data acquisition front ends, and automated test equipment demand amplifiers that settle quickly to sub-millivolt accuracy; the OPA627SM meets this with 55 V/us slewing and 16 MHz bandwidth, achieving fast settling to 0.01% in moderate-gain configurations. The dielectrically isolated process separates input and output stages, minimizing thermal tail behavior that plagues slower precision amplifiers during large transients. The hermetic metal can withstands the demanding environments of rack instruments, and the ±18 V supply rating accommodates ±15 V analog rails with headroom for full-scale 20 Vpp signals. Gain-selectable programmable-gain front ends commonly use OPA627 class amplifiers ahead of 16-bit ADCs such as the CS5532 family.
추천
Integrator and Precision Summing Circuits
Analog integrators used in control loops, function generators, and long-term charge measurement require ultra-low input bias current and low offset drift so that output ramps reflect the true input integral rather than amplifier error. The OPA627SM's picoampere JFET bias limits droop caused by capacitor charging through the input, and 0.8 uV/C drift keeps the summing-node reference stable over the operating range. Its high slew rate allows large, fast integration ramps without clipping, supporting sweeping function generators and precision V-to-F converters. Guard rings driven by the can's shielded metal package protect femtoampere-level nodes; TI datasheet guidance recommends guarding the non-inverting input trace and using PTFE or low-leakage board materials.
추천
Active Filters and Precision Oscillators
Low-distortion sine oscillators (state-variable and Wien bridge) and high-Q active filters need amplifiers with high open-loop gain at the oscillation frequency, low noise, and sufficient slew rate to reproduce peaks without distortion. The OPA627SM's 16 MHz bandwidth and 55 V/us slew rate support oscillators and filters well into the hundreds of kilohertz with THD at or below the measurement floor of typical audio analyzers. The JFET input's high impedance permits large-value precision resistors in the frequency-determining network without loading error, improving achievable Q and accuracy. Its unity-gain stability ensures robust behavior in low-gain filter sections such as Sallen-Key topologies.
추천
추천 제품 요약
엔지니어링 참조 데이터: OPA627SM — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | OPA627BP | OPA637AM | OPA637BP | OPA627BM | OPA602SM |
|---|---|---|---|---|---|---|
| Package | TO-99-8 metal can | TO-99-8 metal can - same | TO-99-8 metal can - same | TO-99-8 metal can - same | TO-99-8 metal can - same | TO-99-8 metal can - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Slew Rate | 55 V/us | 55 V/us | 135 V/us | 135 V/us | 55 V/us | 35 V/us |
| Gain Bandwidth Product | 16 MHz | 16 MHz | 80 MHz | 80 MHz | 16 MHz | 10 MHz |
| Stability | Unity-gain stable | Unity-gain stable | Stable at gain >= 5 | Stable at gain >= 5 | Unity-gain stable | Unity-gain stable |
| Offset Drift Class | 0.8 uV/C max (S grade) | 1.3 uV/C max (B grade class) | A-grade drift limits | B-grade drift limits | B-grade drift limits | S-grade precision FET limits |
| Supply Voltage (max) | ±18 V (36 V) | ±18 V (36 V) | ±18 V (36 V) | ±18 V (36 V) | ±18 V (36 V) | ±18 V (36 V) |
주요 차별점
- Military-grade S limits in hermetic metal can (vs OPA627BP)
- Unity-gain stability with 16 MHz bandwidth (vs OPA637AM)
- Higher speed than legacy precision FET parts (vs OPA602SM)
- Hermetic TO-99 shielding (vs OPA627AU (SOIC-8))
설계 노트
For high-impedance inputs (pins 2 and 3), surround the input traces with a guard ring driven by the low-impedance reference potential (ground or the buffered inverting-node potential for TIAs). This reduces board leakage into the picoampere input node. The TO-99 metal can should be tied to a quiet potential so the hermetic can itself acts as a shield. Use sockets sparingly; machined-pin, low-leakage sockets preserve precision, while cheap spring sockets add thermoelectric offsets and leakage.
Decouple pins 4 and 8 with 0.1 uF ceramic capacitors placed within a few millimeters of the can pins, plus 10 uF tantalum bulk per rail at the board level. Supplying from ±15 V rails leaves adequate headroom below the ±18 V absolute limit. JFET input bias current roughly doubles every 10 C, so keep the OPA627SM away from hot regulators and power resistors; per the TI datasheet this self-heating sensitivity directly affects DC accuracy in precision nodes.
Do not substitute the OPA637 (AM/BP) into unity-gain or low-gain (below 5) circuits: it is decompensated and will oscillate where the OPA627 is stable. Also note TI's guidance that the TO-CAN (metal can) package option is no longer recommended for new designs - plan SOIC-8 (OPA627AU) footprints for future revisions. Finally, the SM grade's military temperature range does not extend to plastic-package grades; verify temperature requirements before switching grades.
규정 준수 정보
Compliance data for the OPA627SM metal can was not present in the provided web data; verify RoHS/REACH status on the TI product page before procurement.
