OPA602BP - 6.5MHz 35V/us Precision Difet Op Amp | Texas Instruments
料号： OPA602BP ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $5.73 | $5.73 |
| 10 | $5.3 | $53.00 |
| 100 | $4.85 | $485.00 |
| 500 | $4.4 | $2,200.00 |
| 1,000 | $4.05 | $4,050.00 |
OPA602BP 概述
An operational amplifier is a high-gain voltage amplifier with differential inputs, forming the foundation of the analog signal chain hierarchy: op amp -> amplifier IC -> analog IC -> semiconductor. Precision op amps like the OPA602 family minimize DC errors (offset, drift, bias current) while preserving AC performance, and the Difet process separates transistors with dielectric isolation to achieve speeds impossible in junction-isolated FET processes.
Key differentiating features include laser-trimmed input circuitry for bipolar-grade offset and drift performance, unity-gain stability, and the ability to drive capacitive loads up to 1500 pF. Per the TI datasheet, all specifications are rated with a 1 kOhm resistor in parallel with a 500 pF load, and wide bandwidth with low distortion minimizes dynamic errors in data-conversion signal paths.
The supply range of +/-5 V to +/-18 V supports both standard +/-15 V analog systems and lower-voltage precision designs. The OPA602BP grade offers the tightest offset specification within the family (OPA602AP is the looser A grade), suiting high-accuracy instrumentation front ends.
Typical applications include precision instrumentation amplifiers, optoelectronic receiver front ends (photodiode transimpedance stages benefit from 1 pA bias current), and sonar/ultrasound signal conditioning where slew rate and settling accuracy are critical.
Design consideration: with FET inputs, bias current doubles roughly every 10 C, so keep thermal gradients away from the input pins and use guard rings to preserve the picoampere-level input performance.
This page synthesizes distributor pricing, drop-in alternative analysis, and practical design notes not found in the manufacturer datasheet.
直接替换替代料： OPA602BP ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： OPA602BP （相同外形与封装尺寸） ——差异在于 Amplifier Type, Package, Slew Rate, Gain Bandwidth Product, Supply Voltage Range.
快速对比工具——选择替代料号进行并排对比：
OPA602BPG4
✅ 直接替换📋 参考替代料（不在目录中）
OPA602AP
✅ 直接替换✓ 有现货
联系询价
查看数据手册 →OPA602APG4
✅ 直接替换📋 参考替代料（不在目录中）
OPA602BP 最大额定值与电气特性
| Amplifier Type | High-Speed Precision Difet Operational Amplifier |
| Number of Circuits | 1 |
| Gain Bandwidth Product | 6.5 MHz |
| Slew Rate | 35 V/us |
| Input Offset Voltage (Max) | +/-250 uV |
| Input Bias Current (Max) | +/-1 pA |
| Settling Time | To 0.01% |
| Supply Voltage Range | +/-5 V to +/-18 V |
| Stability | Unity-gain stable |
| Capacitive Load Drive | Up to 1500 pF |
| Rated Load Condition | 1 kOhm in parallel with 500 pF |
| Input Stage | Difet (dielectrically isolated FET), laser-trimmed |
| 封装 | 8-PDIP |
| 安装类型 | Through Hole |
OPA602BP 引脚配置
| 引脚 1 | NC — Not connected (per datasheet) |
| 引脚 2 | -IN — Inverting input |
| 引脚 3 | +IN — Non-inverting input |
| 引脚 4 | V- — Negative supply |
| 引脚 5 | NC — Not connected (per datasheet) |
| 引脚 6 | OUT — Output |
| 引脚 7 | V+ — Positive supply |
| 引脚 8 | NC — Not connected (per datasheet) |
典型应用
OPA602BP 适用于 6 应用s: Precision Instrumentation, Optoelectronic Receivers, Sonar and Ultrasound Signal Conditioning, Data Conversion Signal Chains, Active Filter and Signal Processing Stages, Test and Measurement Instrumentation.
Precision Instrumentation
The OPA602BP fits precision instrumentation front ends because it combines a +/-250 uV maximum laser-trimmed offset with a 6.5 MHz bandwidth, allowing both DC accuracy and fast signal acquisition in the same stage. In data-acquisition chains it serves as a buffer or gain stage ahead of ADCs, where its fast settling to 0.01% guarantees that the sample capacitor sees an accurate voltage within one acquisition cycle. Its unity-gain stability means it can directly buffer sensor outputs without compensation networks, and the 1500 pF capacitive load drive tolerates long input cabling typical of industrial instrumentation. Per the TI datasheet, specifications are rated with a 1 kOhm parallel 500 pF load, giving designers a realistic operating envelope. Trade-off: the +/-5 V to +/-18 V supply range matches classic +/-15 V analog systems but requires a dual rail.
推荐
Optoelectronic Receivers
Optoelectronic detection benefits directly from the OPA602BP's +/-1 pA maximum input bias current, which reduces current-induced offset error in photodiode transimpedance amplifiers to negligible levels. TI explicitly lists optoelectronics as a target application for the OPA602 family. The 6.5 MHz gain bandwidth supports fast photodiode signals in laser-receiver and optical-sensor circuits, while the 35 V/us slew rate prevents slew-induced distortion on sharp optical edges. In a transimpedance configuration, the feedback resistor sets gain while the OPA602BP's FET input preserves sensitivity; its unity-gain stability simplifies compensation across a wide range of feedback capacitor values. Design consideration: bias current of FET inputs roughly doubles every 10 C, so thermal management of the input node directly preserves the picoampere-level accuracy in these receivers.
推荐
Sonar and Ultrasound Signal Conditioning
Sonar and ultrasound front ends are listed by TI as primary OPA602 applications because these systems demand simultaneous high slew rate and precision. The 35 V/us slew rate handles the fast acoustic return pulses without slew limiting, while the +/-250 uV offset ensures that small received signals are not corrupted by input error before bandpass filtering. Fast settling to 0.01% is critical in time-of-flight measurements, where the amplifier must recover quickly after transmit pulses to avoid masking weak echoes. The OPA602BP's ability to drive 1500 pF loads directly suits piezo transducer interfaces that present significant capacitance. Operating from +/-15 V rails typical of sonar systems, the amplifier provides generous output swing. The low distortion wideband design minimizes dynamic errors in these time-critical analog chains.
推荐
Data Conversion Signal Chains
The OPA602BP was designed for data conversion front ends: its Difet process provides the unusual combination of high speed and accuracy needed between sensors and ADCs or DACs. As an ADC driver, its settling to 0.01% ensures the sample-and-hold aperture captures a settled value, and the low bias current avoids error with high source impedances. For DAC output buffering, unity-gain stability plus 1500 pF capacitive load drive handles reference bypass capacitance without oscillation. The +/-5 V to +/-18 V supply range supports both classic +/-15 V precision conversion systems and lower-voltage mixed-signal boards. Per the FindIC listing, the part is characterized as a precision wide-bandwidth FET op amp specifically for data conversion. Trade-off: it is a single amplifier, so dual-channel designs require two packages or a dual op amp alternative.
推荐
Active Filter and Signal Processing Stages
The wide bandwidth and low distortion of the OPA602BP, which TI states minimize AC errors, make it effective in precision active filters operating into the hundreds of kilohertz. With a 6.5 MHz gain bandwidth, a 100 kHz multiple-feedback low-pass filter retains sufficient loop gain for accurate Q and cutoff frequency, whereas a general-purpose 1 MHz op amp would exhibit significant corner-frequency error at the same setting. The low 1 pA bias current permits large-value filter resistors (megaohm range) without significant offset error, enabling low-frequency precision filters with small capacitors. Unity-gain stability suits Sallen-Key topologies, and the 35 V/us slew rate prevents distortion on large-amplitude signals. This combination of DC precision and AC performance in one device simplifies filter design where both matter.
推荐
Test and Measurement Instrumentation
Bench and embedded test instruments exploit the OPA602BP's blend of precision and speed for input conditioning of oscilloscope front ends, data loggers, and signal generators. The +/-250 uV offset and laser-trimmed drift give DC measurements bipolar-grade accuracy, while 6.5 MHz bandwidth and 35 V/us slew preserve waveform fidelity for dynamic signals. Settling to 0.01% supports autoranging input attenuators that must settle rapidly after range switching. The rugged capacitive load drive (1500 pF) tolerates probes, coaxial cable, and switched input networks without external compensation. Operating on +/-5 V to +/-18 V dual rails matches traditional instrument power architectures. Through-hole PDIP packaging also simplifies prototyping and field repair of legacy instrument designs where surface-mount rework is impractical.
推荐
推荐产品汇总
工程参考数据： OPA602BP ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | OPA602BPG4 | OPA602AP | OPA602APG4 |
|---|---|---|---|---|
| Package | 8-PDIP | 8-PDIP - same | 8-PDIP - same | 8-PDIP - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Gain Bandwidth | 6.5 MHz | 6.5 MHz | 6.5 MHz | 6.5 MHz |
| Slew Rate | 35 V/us | 35 V/us | 35 V/us | 35 V/us |
| Input Offset Voltage | +/-250 uV max (B grade) | +/-250 uV max | A grade limit (looser than B grade) | A grade limit (looser than B grade) |
| Input Bias Current | +/-1 pA max | +/-1 pA max | +/-1 pA max | +/-1 pA max |
| Supply Voltage Range | +/-5 V to +/-18 V | +/-5 V to +/-18 V | +/-5 V to +/-18 V | +/-5 V to +/-18 V |
| Packaging / RoHS | Tube (standard PDIP solder-dip termination) | Lead-free / RoHS packaging revision | Tube (standard) | Lead-free / RoHS packaging revision |
关键差异点
- Tightest offset grade in the OPA602 DIP family （对比 OPA602AP)
- Ultra-low picoampere bias with wideband speed （对比 OPA602BPG4)
- Difet process combining FET precision with high speed （对比 Generic precision bipolar op amps)
设计说明
Preserve picoampere input performance with proper layout: place the OPA602BP input traces away from supply and output traces, and add a driven guard ring around the summing node connected to the low-impedance input potential. Clean the PCB thoroughly or use conformal coating, since flux residue leakage of a few nanoamperes would completely swamp the +/-1 pA bias current specification. High-value feedback resistors in transimpedance stages should be mounted close to pin 2 to minimize stray capacitance at the inverting node.
Decouple both supplies with 0.1 uF ceramic capacitors placed within a few millimeters of pins 4 and 7, plus a 10 uF bulk capacitor per rail. The OPA602BP operates from +/-5 V to +/-18 V; at +/-15 V rails the total supply span is 30 V, which is within the absolute maximum but leaves no margin - never use +/-18 V rails with transient overshoot above 36 V total. The unity-gain stable design requires no external compensation even with 1500 pF capacitive loads, but isolate resistive/capacitive load combinations exceeding the datasheet rated 1 kOhm parallel 500 pF condition.
FET-input bias current approximately doubles for every 10 C increase in junction temperature, so the effective 1 pA input current at 25 C may rise substantially in a hot enclosure. Locate the OPA602BP away from heat sources such as power regulators, and avoid placing temperature gradients across the package, which also degrade offset and drift. Estimated: in a 70 C environment, expect bias current roughly 4-5x the 25 C value - recalculate input-referred error for precision designs rather than assuming room-temperature bias figures.
合规信息
RoHS/lead-free status not stated in the provided web data; the G4-suffix family variants (OPA602BPG4) denote TI lead-free packaging revisions. Verify on the official TI product page before procurement.
