AD8674BRZ - Precision Quad Op Amp, 10MHz | Analog Devices
MPN: AD8674BRZ ✓ نشطAD8674BRZ نظرة عامة
An operational amplifier (op amp) is a high-gain voltage amplifier with differential inputs and a single-ended output. It is a fundamental building block in analog electronics, used in signal conditioning, filtering, and instrumentation. The AD8674 is a quad op amp, meaning it contains four independent amplifiers in one package, saving board space and cost in multi-channel systems. It belongs to the family of precision amplifiers, which prioritize low offset, low noise, and high stability over raw speed.
Key features of the AD8674BRZ include a low input bias current of 1 nA (typical), a low offset voltage of 10 µV (typical), and a low noise density of 2.8 nV/√Hz. The device also offers a high open-loop gain of 126 dB and a slew rate of 2.5 V/µs. These specifications make it ideal for precision data acquisition, sensor conditioning, and active filtering. The rail-to-rail output stage allows maximum dynamic range in single-supply applications.
The AD8674 uses a precision bipolar process with laser-trimmed thin-film resistors, achieving excellent DC accuracy. The high open-loop gain and wide bandwidth enable high closed-loop gain configurations without significant gain error. The device is specified over the industrial temperature range of -40°C to +125°C, ensuring reliable operation in harsh environments.
Typical applications include precision instrumentation, medical devices, industrial process control, and audio signal processing. The low noise and low offset make it suitable for high-resolution ADC driver circuits, while the quad configuration is ideal for multi-channel data acquisition systems. The rail-to-rail output simplifies interface with ADCs and other mixed-signal devices.
When designing with the AD8674BRZ, ensure proper power supply decoupling with 0.1 µF ceramic capacitors close to the supply pins. The device is unity-gain stable, but for high-speed applications, consider the capacitive load stability. The SOIC-14 package provides good thermal performance for moderate power dissipation.
بدائل مباشرة لـ AD8674BRZ — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع AD8674BRZ (نفس عامل الشكل والبصمة) — يختلف في Capacitive Load Stability, Input Bias Current, Package, Slew Rate, Supply Voltage Range.
AD8674ARZ
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←AD8674ARZ-REEL
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
OPA4277UA
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
OPA4227UA
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
LT1114CN
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
AD8674BRZ الحدود القصوى والخصائص الكهربائية
| Number of Channels | 4 |
| Supply Voltage Range | ±2.5 V to ±18 V (dual), 5 V to 36 V (single) |
| Bandwidth | 10 MHz |
| Slew Rate | 2.5 V/µs |
| Input Offset Voltage | 10 µV (typical) |
| Input Bias Current | 1 nA (typical) |
| Voltage Noise Density | 2.8 nV/√Hz |
| Open-Loop Gain | 126 dB |
| نوع الخرج | Rail-to-Rail |
| Capacitive Load Stability | Stable with >1000 pF |
| نطاق درجة حرارة التشغيل | -40°C to +125°C |
| العلبة | SOIC-14 |
| نوع التركيب | Surface Mount |
| حالة RoHS | Compliant |
| Lead-Free | Yes |
تكوين أطراف AD8674BRZ
| دبوس 1 | OUT A — Output of amplifier A |
| دبوس 2 | -IN A — Inverting input of amplifier A |
| دبوس 3 | +IN A — Non-inverting input of amplifier A |
| دبوس 4 | V+ — Positive supply |
| دبوس 5 | +IN B — Non-inverting input of amplifier B |
| دبوس 6 | -IN B — Inverting input of amplifier B |
| دبوس 7 | OUT B — Output of amplifier B |
| دبوس 8 | OUT C — Output of amplifier C |
| دبوس 9 | -IN C — Inverting input of amplifier C |
| دبوس 10 | +IN C — Non-inverting input of amplifier C |
| دبوس 11 | V- — Negative supply |
| دبوس 12 | +IN D — Non-inverting input of amplifier D |
| دبوس 13 | -IN D — Inverting input of amplifier D |
| دبوس 14 | OUT D — Output of amplifier D |
التطبيقات النموذجية
AD8674BRZ مناسب لـ 6 التطبيقs: Precision Data Acquisition, Instrumentation Amplifiers, Active Filters, Medical Instrumentation, Industrial Process Control, Audio Signal Processing.
Precision Data Acquisition
The AD8674BRZ's low offset voltage (10 µV) and low noise (2.8 nV/√Hz) make it ideal for driving high-resolution ADCs in data acquisition systems. Its quad configuration allows simultaneous sampling of multiple channels, and the rail-to-rail output maximizes dynamic range. The wide bandwidth of 10 MHz ensures fast settling for multiplexed inputs.
موصى به
Instrumentation Amplifiers
In precision instrumentation, the AD8674BRZ can be used to build three-op-amp instrumentation amplifiers with high common-mode rejection. Its low input bias current (1 nA) minimizes errors from source impedance, and the low offset drift ensures accuracy over temperature. The quad package allows multiple channels in a compact design.
موصى به
Active Filters
The 10 MHz bandwidth and high open-loop gain (126 dB) of the AD8674BRZ make it suitable for active filters in signal conditioning. It can implement Butterworth, Chebyshev, or Bessel filters with precise cutoff frequencies. The low noise ensures minimal degradation of signal-to-noise ratio in the passband.
موصى به
Medical Instrumentation
The AD8674BRZ is well-suited for medical devices such as ECG and EEG amplifiers, where low noise and low offset are critical for accurate biopotential measurement. Its low power consumption extends battery life in portable monitors. The wide temperature range supports sterilization and harsh environments.
موصى به
Industrial Process Control
In industrial control systems, the AD8674BRZ provides precise signal conditioning for sensors like thermocouples and strain gauges. Its rail-to-rail output interfaces directly with ADCs and microcontrollers. The quad configuration reduces board space in multi-channel controllers, and the robust temperature range ensures reliability in factory environments.
موصى به
Audio Signal Processing
The AD8674BRZ's low noise (2.8 nV/√Hz) and low distortion make it suitable for high-quality audio applications. It can be used in preamplifiers, equalizers, and active crossovers. The quad configuration allows stereo channels with additional stages, and the wide bandwidth preserves audio fidelity.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ AD8674BRZ — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | AD8674ARZ | OPA4277UA | OPA4227UA |
|---|---|---|---|---|
| Package | SOIC-14 | SOIC-14 | SOIC-14 | SOIC-14 |
| Brand | Analog Devices | Analog Devices | Texas Instruments | Texas Instruments |
| Number of Channels | 4 | 4 | 4 | 4 |
| Bandwidth | 10 MHz | 10 MHz | 1 MHz | 8 MHz |
| Input Offset Voltage | 10 µV | 10 µV | 10 µV | 10 µV |
| Voltage Noise Density | 2.8 nV/√Hz | 2.8 nV/√Hz | 8 nV/√Hz | 3 nV/√Hz |
| Supply Voltage Range | ±2.5 V to ±18 V | ±2.5 V to ±18 V | ±2 V to ±18 V | ±2.5 V to ±18 V |
| Operating Temperature Range | -40°C to +125°C | -40°C to +85°C | -40°C to +125°C | -40°C to +125°C |
أبرز الفروقات
- Higher bandwidth than OPA4277 (مقابلOPA4277UA)
- Lower noise than OPA4277 (مقابلOPA4277UA)
- Wider temperature range than AD8674ARZ (مقابلAD8674ARZ)
ملاحظات التصميم
Use 0.1 µF ceramic capacitors close to each supply pin (V+ and V-) to decouple high-frequency noise. Additionally, a 10 µF tantalum capacitor on each supply rail can help with low-frequency transients. Proper decoupling is critical for maintaining the low noise performance of the AD8674BRZ.
For optimal performance, place the AD8674BRZ away from high-speed digital traces and use a ground plane to minimize noise pickup. Keep input traces short and shielded if necessary. The SOIC-14 package has a thermal pad? No, it does not, so ensure adequate copper area for heat dissipation if power dissipation is significant.
Avoid exceeding the absolute maximum supply voltage of ±18 V. Also, be cautious with capacitive loads: although the AD8674BRZ is stable with >1000 pF, larger loads may cause ringing. Use a series resistor if driving long cables. Additionally, the input common-mode range does not include the negative rail, so level-shift signals if needed.
معلومات الامتثال
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified.
