OP42GSZ-REEL7 - Fast Precision JFET Op Amp | Analog Devices
MPN: OP42GSZ-REEL7 ✓ Hoạt độngOP42GSZ-REEL7 Tóm tắt
An operational amplifier (op amp) is a high-gain voltage amplifier with differential inputs and a single-ended output, used in analog circuits for amplification, filtering, and signal conditioning. Op amps are fundamental building blocks in analog electronics, forming the basis of active filters, comparators, integrators, and many other circuits. The OP42 belongs to the JFET-input op amp family, which offers high input impedance and low input bias current, ideal for interfacing with high-impedance sources.
Key features include a gain-bandwidth product of 10 MHz, a wide full-power bandwidth of 900 kHz, and a fast settling time of 800 ns to 0.01%. The input offset voltage is 5 mV maximum, and the common-mode rejection ratio is 94 dB nominal. The device is specified for industrial temperature grades and is RoHS compliant, ensuring suitability for a wide range of applications.
The OP42 uses a bipolar process with JFET input stage, providing low noise and high speed. Its symmetric slew rate ensures balanced positive and negative signal transitions, reducing distortion in high-frequency applications. The unity-gain stability simplifies design, eliminating the need for external compensation components.
Typical applications include high-speed data acquisition, precision instrumentation, active filters, and buffer amplifiers. The OP42 can directly replace devices such as the AD544, AD611, AD711, and LF400, offering an upgrade path for existing designs. Its fast settling time makes it ideal for sample-and-hold circuits and DAC output buffering.
When designing with the OP42, ensure proper decoupling of the power supply pins with 0.1 µF ceramic capacitors placed close to the device. The input common-mode range extends to the negative rail, but for best performance, keep inputs within the specified range. The output can drive capacitive loads up to 100 pF without oscillation, but for larger loads, add a series resistor.
Bộ thay thế dễ dàng lắp đặt cho OP42GSZ-REEL7 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với OP42GSZ-REEL7 (cùng hình factor và footprint) — khác nhau ở Package, Slew Rate, Supply Voltage Range.
OP42GSZ-R7
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
OP42GS-REEL7
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
OP42GSZ
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →AD711
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
LF400
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
OP42GSZ-REEL7 Tỷ lệ tối đa & tính chất điện
| Amplifier Type | J-FET |
| Number of Circuits | 1 |
| Slew Rate | 58 V/µs (typical) |
| Gain Bandwidth Product | 10 MHz |
| Full Power Bandwidth | 900 kHz |
| Settling Time | 800 ns to 0.01% |
| Input Offset Voltage | 5 mV (max) |
| Common Mode Rejection Ratio | 94 dB (nominal) |
| Supply Voltage Range | ±4.5 V to ±20 V |
| Điện áp cung cấp | 6 mA (max) |
| Khoảng nhiệt độ hoạt động | -40°C to +85°C |
| Hộp | 8-SOIC |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
Cấu hình chân OP42GSZ-REEL7
| Chân 1 | OFFSET NULL — Offset null adjustment |
| Chân 2 | IN- — Inverting input |
| Chân 3 | IN+ — Non-inverting input |
| Chân 4 | V- — Negative supply |
| Chân 5 | OFFSET NULL — Offset null adjustment |
| Chân 6 | OUT — Output |
| Chân 7 | V+ — Positive supply |
| Chân 8 | NC — No connection |
Ứng dụng tiêu biểu
OP42GSZ-REEL7 phù hợp cho 6 Áp dụngs: High-Speed Data Acquisition, Active Filters, Precision Instrumentation, Audio Signal Processing, Test and Measurement, Industrial Control.
High-Speed Data Acquisition
The OP42GSZ-REEL7's 58 V/µs slew rate and 800 ns settling time to 0.01% make it ideal for buffering fast analog signals in data acquisition systems. Its high bandwidth ensures minimal signal distortion when driving ADC inputs, and the JFET input stage provides high impedance to avoid loading the source. In a typical SAR ADC front-end, the op amp is configured as a unity-gain buffer or gain stage, with a 10 MHz gain-bandwidth product supporting high-throughput sampling. The fast settling ensures the output stabilizes within the ADC acquisition window, preserving accuracy. For best performance, use a low-impedance source and place a small RC filter at the output to limit noise.
Được đề xuất
Active Filters
With a gain-bandwidth product of 10 MHz, the OP42GSZ-REEL7 is well-suited for active filter designs in the audio and low-frequency range. Its high slew rate prevents distortion in high-Q filters where large signal swings occur. The JFET input provides low bias current, allowing the use of high-value resistors without offset errors. For a second-order low-pass filter, the op amp can be configured in a Sallen-Key topology with cutoff frequencies up to 1 MHz. The wide full-power bandwidth of 900 kHz ensures the filter maintains its response at high amplitudes. Designers should select capacitor values carefully to avoid parasitic oscillations, and use metal-film resistors for stability.
Được đề xuất
Precision Instrumentation
The OP42GSZ-REEL7's low offset voltage (5 mV max) and high CMRR (94 dB) make it suitable for precision instrumentation amplifiers. Its JFET input ensures negligible loading on high-impedance sensors, such as pH probes and photodiodes. In a typical instrumentation amplifier, the OP42 can be used as a buffer or gain stage, providing high input impedance and stable gain. The 10 MHz bandwidth allows accurate amplification of fast sensor signals, while the fast settling time ensures quick response to transients. For best accuracy, use precision resistors with low temperature coefficients and provide proper shielding to minimize noise pickup.
Được đề xuất
Audio Signal Processing
Although not specifically designed for audio, the OP42GSZ-REEL7's high slew rate and low distortion make it usable in audio applications such as headphone amplifiers and active crossovers. Its 10 MHz bandwidth ensures flat response across the audio spectrum, and the JFET input provides high impedance for volume control circuits. The symmetric slew rate of 58 V/µs allows large output swings without slew-induced distortion, preserving audio fidelity. However, for ultra-low-noise audio designs, consider dedicated audio op amps like the OPA1612. When using the OP42 in audio, ensure proper power supply decoupling and use high-quality capacitors in the signal path.
Được đề xuất
Test and Measurement
In test and measurement equipment, the OP42GSZ-REEL7 provides fast, accurate signal conditioning for oscilloscope front-ends, waveform generators, and spectrum analyzers. Its high slew rate and bandwidth allow faithful reproduction of high-frequency waveforms, while the fast settling time ensures accurate amplitude measurements. The JFET input minimizes loading on the device under test, preserving signal integrity. For example, in an oscilloscope input stage, the OP42 can be used as a buffer or gain stage with a bandwidth of 10 MHz, suitable for many general-purpose measurements. The wide supply voltage range allows operation from ±15 V rails commonly found in bench instruments.
Được đề xuất
Industrial Control
The OP42GSZ-REEL7's industrial temperature range (-40°C to +85°C) and robust design make it suitable for industrial control systems, such as motor control loops and process transmitters. Its high slew rate enables fast response in closed-loop control, while the JFET input provides high impedance for sensor interfaces. In a PID controller, the op amp can be used in the error amplifier stage, providing high gain and bandwidth for accurate control. The 10 MHz gain-bandwidth product allows the controller to respond to rapid changes in process variables. For harsh environments, ensure proper PCB layout and use conformal coating to protect against moisture and vibration.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho OP42GSZ-REEL7 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | OP42GSZ-R7 | OP42GS-REEL7 | OP42GSZ | OP42GPZ | AD711 | LF400 |
|---|---|---|---|---|---|---|---|
| Package | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-PDIP | 8-SOIC | 8-SOIC |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | National Semiconductor |
| Slew Rate | 58 V/µs | 58 V/µs | 58 V/µs | 58 V/µs | 58 V/µs | 20 V/µs | 30 V/µs |
| Gain Bandwidth Product | 10 MHz | 10 MHz | 10 MHz | 10 MHz | 10 MHz | 4 MHz | 5 MHz |
| Input Offset Voltage (max) | 5 mV | 5 mV | 5 mV | 5 mV | 5 mV | 2 mV | 5 mV |
| Supply Current (max) | 6 mA | 6 mA | 6 mA | 6 mA | 6 mA | 2.5 mA | 5 mA |
| Settling Time (0.01%) | 800 ns | 800 ns | 800 ns | 800 ns | 800 ns | 1 µs | 1.5 µs |
| RoHS Compliant | Yes | Yes | No | Yes | Yes | Yes | Yes |
Bảo phân biệt quan trọng
- Higher slew rate than AD711 (vsAD711)
- Faster settling time than LF400 (vsLF400)
- RoHS compliant vs OP42GS-REEL7 (vsOP42GS-REEL7)
Ghi chú thiết kế
The OP42GSZ-REEL7 operates from dual supplies up to ±20 V. Ensure that the supply voltages are within the absolute maximum ratings and are properly decoupled with 0.1 µF ceramic capacitors placed close to the V+ and V- pins. For high-frequency applications, add a 10 µF tantalum capacitor in parallel to filter low-frequency noise.
For optimal performance, place the OP42GSZ-REEL7 on a PCB with a solid ground plane. Keep the input traces short and shielded to minimize parasitic capacitance and noise pickup. Use surface-mount components to reduce lead inductance. The 8-SOIC package has a thermal pad on the bottom; connect it to the ground plane for improved heat dissipation.
Avoid driving capacitive loads greater than 100 pF directly, as this may cause oscillation. If larger loads are required, add a series resistor of 50-100 Ω at the output. Also, ensure that the input common-mode voltage does not exceed the specified range, as this can cause phase reversal in some JFET op amps.
Thông tin tuân thủ
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified.
