OPA602AP - 6.5MHz Precision Difet Op Amp | Texas Instruments
부품 번호: OPA602AP ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
OPA602AP 개요
An operational amplifier is a high-gain voltage amplifier with differential inputs and a single-ended output, forming the foundational building block of the analog signal chain hierarchy: op amp -> amplifier IC -> analog IC -> semiconductor. Precision op amps such as the OPA602 combine the accuracy of a precision bipolar device with the speed of a FET-input design, making them a category distinct from general-purpose amplifiers.
Key features include a maximum input bias current of +/-1 pA, enabled by the Difet JFET input stage; fast settling time to 0.01%; and unity-gain stability. According to the TI datasheet, the device is unity-gain stable and can drive capacitive loads up to 1500 pF, an unusually high capacitive-drive capability for a precision amplifier. Laser-trimmed input circuitry provides offset voltage and drift performance normally associated with precision bipolar op amps.
The monolithic Difet (dielectrically isolated FET) construction is the core technology: dielectric isolation eliminates the parasitic junction capacitances of conventional JFET processes, allowing an unusual combination of high speed and accuracy in one die. Wide bandwidth and low distortion minimize AC errors, while the picoampere input bias current minimizes DC errors in high-impedance signal paths.
Typical applications include precision instrumentation front ends, optoelectronics receivers, and sonar and ultrasound signal processing, where pulse fidelity and DC accuracy must coexist. Datasheet specifications are rated with a 1 kOhm resistor in parallel with a 500 pF load, so engineers should evaluate dynamic specs against actual load conditions.
A key design consideration is supply headroom: the OPA602AP operates from +/-18 V supplies, and the Difet input stage performs best when inputs are kept within the linear common-mode range; output settling behavior should be verified in breadboard when driving heavy capacitive loads.
This page synthesizes distributor pricing context, drop-in alternative analysis, pinout, and practical design notes beyond what the manufacturer datasheet alone provides.
드롭인 대체품: OPA602AP — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: OPA602AP (동일 폼 팩터 및 풋프린트) — 차이점: Package, Rated Load Condition, Input Bias Current, Input Offset Voltage.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
OPA602BP
✅ 드롭인 ⚠️ 사양 미검증✓ 재고 있음
$4.05 / 개
데이터시트 보기 →OPA602AP 최대 정격 & 전기적 특성
| Amplifier Type | High-Speed Precision Difet Operational Amplifier |
| Number of Channels | 1 |
| Bandwidth | 6.5 MHz |
| Slew Rate | 35 V/us |
| Input Offset Voltage | +/-250 uV max |
| Input Bias Current | +/-1 pA max |
| Settling Time | to 0.01% |
| Stability | Unity-gain stable |
| Capacitive Load Drive | up to 1500 pF |
| 공급 전압 | +/-18 V |
| 패키지 | 8-PDIP |
| 실장 유형 | Through Hole |
| Packaging | Tube |
| Technology | Difet (dielectrically isolated FET), laser-trimmed |
| Rated Load Condition | 1 kOhm in parallel with 500 pF |
| 카테고리 | Instrumentation, Op Amps, Buffer Amps |
OPA602AP 핀 구성
| 핀 1 | TRIM — Offset voltage trim terminal A |
| 핀 2 | IN- — Inverting input |
| 핀 3 | IN+ — Non-inverting input |
| 핀 4 | V- — Negative supply |
| 핀 5 | TRIM — Offset voltage trim terminal B |
| 핀 6 | OUT — Output |
| 핀 7 | V+ — Positive supply |
| 핀 8 | NC — Not connected (per datasheet) |
일반적인 애플리케이션
OPA602AP 적합 용도: 6 애플리케이션s: Precision Instrumentation, Optoelectronics Receivers, Sonar Signal Processing, Ultrasound Equipment, Data Conversion Signal Conditioning, Analog Multiplier and Compute Circuits.
Precision Instrumentation
The OPA602AP fits precision instrumentation front ends where DC accuracy and dynamic fidelity must coexist. Its +/-250 uV maximum offset voltage and laser-trimmed input circuitry preserve measurement accuracy, while the +/-1 pA maximum bias current prevents loading of high-impedance sensors such as photodiodes and piezoelectric transducers. In a typical amplifier stage, the 6.5 MHz bandwidth and 35 V/us slew rate keep gain errors low across the signal band, and fast settling to 0.01% supports multiplexed data-acquisition channels that must settle between samples. The unity-gain stable topology and 1500 pF capacitive-load drive allow direct buffering of anti-aliasing filter nodes and long shielded cables without external compensation, reducing component count in instrumentation signal chains.
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Optoelectronics Receivers
In optoelectronics applications such as photodiode transimpedance amplifiers, the OPA602AP's Difet input stage is decisive: the +/-1 pA maximum bias current means input leakage contributes almost no offset to the photodiode current, preserving low-light sensitivity. The laser-trimmed +/-250 uV offset keeps the DC operating point of high-gain receiver stages accurate without trimming in many designs. Dynamic performance matters equally - the 6.5 MHz bandwidth supports fast optical pulse detection, and the 35 V/us slew rate prevents slew-induced distortion on leading edges. Because specifications are rated with a 1 kOhm in parallel with 500 pF load, the amplifier tolerates the capacitance of larger-area photodiodes, and unity-gain stability plus 1500 pF drive simplifies buffering the transimpedance output into cable runs or converters.
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Sonar Signal Processing
The OPA602AP is explicitly listed by Texas Instruments for sonar applications, where receive-chain amplifiers must handle large dynamic-range pulse signals with minimal error. The 35 V/us slew rate ensures the amplifier tracks fast sonar echo edges without slew limiting, while the 6.5 MHz bandwidth covers the harmonics needed for pulse fidelity. DC stability matters during quiet periods: the +/-250 uV maximum offset and picoampere bias current prevent baseline drift that would otherwise consume ADC headroom. Operation from +/-18 V supplies provides generous signal swing for high-amplitude transducer outputs. Fast settling to 0.01% lets time-gated receive windows open immediately after transmit pulses, and unity-gain stability eases use in active filter and gain-programmable stages of the sonar front end.
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Ultrasound Equipment
Medical and industrial ultrasound receivers use the OPA602AP in preamplifier and filter stages because pulse accuracy directly determines image resolution. The 6.5 MHz bandwidth and 35 V/us slew rate preserve the shape of MHz-range echo bursts, minimizing distortion that would blur time-of-flight measurements, while settling to 0.01% supports fast TGC (time-gain compensation) switching. The +/-250 uV offset and +/-1 pA bias keep the receive baseline stable across temperature, which the laser-trimmed Difet input makes practical without field calibration. The +/-18 V supply range accepts the large transmit-recovery transients typical of piezoelectric arrays. Unity-gain stability and 1500 pF capacitive drive let one OPA602AP stage directly drive the input filter or ADC driver network without external compensation capacitors.
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Data Conversion Signal Conditioning
The OPA602AP serves as an ADC driver and DAC output conditioner because, per the datasheet, its high slew rate and fast settling time allow accurate signal processing in pulse and data conversion applications. Settling to 0.01% (effectively 12-bit-level accuracy) ensures the amplifier presents a settled voltage to the converter within the acquisition window, while low distortion minimizes AC errors that degrade SNR and THD. The +/-1 pA bias current makes it suitable in the feedback networks of switched-capacitor and R-2R DAC outputs without introducing error currents. Its ability to drive up to 1500 pF lets it directly stabilize large ADC input capacitors. Precision ADC companions such as the CS5532 benefit from this clean, settled drive at the analog input.
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Analog Multiplier and Compute Circuits
Legacy analog computation blocks - multipliers, log amps, and precision summing nodes - use the OPA602AP as the active element around devices such as the MPY100 analog multiplier. Here the op amp's DC precision sets system accuracy: the +/-250 uV maximum offset contributes directly to output error, and the +/-1 pA bias current keeps summing-junction error negligible with large feedback resistors. Simultaneously, the 6.5 MHz bandwidth and 35 V/us slew rate preserve computation bandwidth for dynamic signals, and settling to 0.01% guarantees the computed result is valid quickly. The offset-trim pins (1 and 5) allow nulling residual offset in highest-accuracy compute loops, a feature the standard 8-pin PDIP pinout exposes directly on the board.
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추천 제품 요약
엔지니어링 참조 데이터: OPA602AP — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | OPA602BP |
|---|---|---|
| Package | 8-PDIP | 8-PDIP - same |
| Brand | Texas Instruments (Burr-Brown) | Texas Instruments (Burr-Brown) |
| Bandwidth | 6.5 MHz | 6.5 MHz |
| Slew Rate | 35 V/us | 35 V/us |
| Input Offset Voltage | +/-250 uV max | tighter grade limit (lower than AP) |
| Input Bias Current | +/-1 pA max | +/-1 pA max |
| Supply Voltage | +/-18 V | +/-18 V |
| Grade / Accuracy Class | Standard precision (AP) | High precision (BP) |
주요 차별점
- Difet process combines pA bias with high speed (vs OPA602BP)
- Unusual capacitive-load drive for a precision amplifier (vs OPA602BP)
- High supply range in a legacy through-hole package (vs OPA602BP)
설계 노트
The OPA602AP is a through-hole PDIP-8 part; keep the feedback path short even on through-hole layouts to preserve the 6.5 MHz bandwidth. Use a ground plane with clearance under pins 2 and 3 to minimize leakage - at +/-1 pA bias current, PCB surface leakage can exceed input bias by orders of magnitude. Guard rings driven at the input potential around the summing junction are recommended for transimpedance applications, and a 100 nF ceramic capacitor placed within a few millimeters of pins 4 and 7 to ground handles supply transients during 35 V/us slewing.
Do not evaluate the datasheet dynamic specifications at arbitrary loads: the TI datasheet rates all specifications with a 1 kOhm resistor in parallel with a 500 pF load, so a different load network can yield different bandwidth and settling behavior. Also, while the OPA602 drives up to 1500 pF capacitively and is unity-gain stable, heavy capacitive loads combined with high closed-loop gain can introduce peaking - verify phase margin by simulation or bench measurement in the final configuration rather than relying on the 1500 pF figure alone.
Supply the OPA602AP from well-regulated +/-15 V to +/-18 V rails within the +/-18 V maximum. The Difet process gives excellent rejection, but high-speed slewing (35 V/us) draws transient supply current that can couple into neighboring precision circuitry through shared supply impedance; use local 100 nF plus 10 uF decoupling per supply pin. For lowest offset error, take advantage of the offset-trim pins (1 and 5) with the trim network shown in the TI datasheet instead of over-specifying the grade - or select the OPA602BP grade when trimming is impractical.
규정 준수 정보
Compliance status for the legacy PDIP-8 OPA602AP was not stated in the verified web data; consult the TI product page or distributor compliance certificates.
