AD8676BRMZ - Dual Precision 36V Rail-to-Rail Op Amp | Analog Devices
Артикул: AD8676BRMZ ✓ Активен| Кол-во | Цена за ед. | Итого |
|---|---|---|
| 1 | $4.85 | $4,85 |
| 10 | $4.36 | $43,60 |
| 100 | $3.88 | $388,00 |
| 500 | $3.49 | $1.745,00 |
| 1.000 | $3.1 | $3.100,00 |
| 3.000 | $2.78 | $8.340,00 |
AD8676BRMZ Обзор
A precision operational amplifier (op amp) is an analog integrated circuit that amplifies differential input voltages with very high DC accuracy, low offset, and low noise, serving as a foundational building block in instrumentation, signal conditioning, and active filtering. In the broader taxonomy, the AD8676 belongs to the op amp family within amplifier ICs, which in turn fall under the analog signal chain category of integrated circuits. Precision op amps are distinguished from general-purpose op amps by tight initial offset, low offset drift over temperature, low input bias current, and low broadband noise.
Key features of the AD8676 include a typical offset voltage of 12 µV, an offset drift of 0.5 µV/°C, and a gain bandwidth product of 10 MHz with a 2.5 V/µs slew rate. The amplifier delivers rail-to-rail output swing, low input bias current of 2 nA, and very low broadband voltage noise density. It is unity-gain stable, comes in industry-standard pinouts, and is specified across -40 °C to +125 °C operation. The 8-pin MSOP (RM) package makes it ideal for dense analog layouts.
The AD8676 uses a precision bipolar input stage combined with a rail-to-rail output stage, achieving both low noise and wide output swing in a single die. Its DC precision rivals chopper-stabilized amplifiers but without the chopping artifacts, while still providing wide bandwidth for AC-coupled signal paths.
Typical applications include precision instrumentation amplifiers, strain-gauge and thermocouple signal conditioning, high-impedance sensors, medical instrumentation, and professional audio line drivers. The combination of low noise and low bias current makes the AD8676 particularly suited to photodiode transimpedance front-ends and precision analog front ends for industrial control.
When designing with the AD8676, ensure that the input common-mode voltage stays within the specified range, that the output is not loaded below the rated minimum resistive load, and that decoupling capacitors are placed as close as possible to the supply pins to preserve PSRR and noise performance.
This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical design notes not found in the manufacturer datasheet alone, providing a single decision-ready reference for engineers selecting a precision op amp for the 8-MSOP footprint.
Аналоги без доработки для AD8676BRMZ — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
Варианты в этой серии
Модели той же серии, совместимые без доработки с AD8676BRMZ (тот же форм-фактор и посадочное место) — отличается по Amplifier Type, Gain Bandwidth Product, Operating Temperature Range, Package, Slew Rate.
Инструмент быстрого сравнения — выберите альтернативные компоненты для сравнения бок о бок:
AD8676ARZ
✅ Прямая замена✓ В наличии
$2.25 / шт.
Открыть даташит →AD8676BRZ
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
AD8676ARMZ
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
AD8676BRMZ-REEL
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
AD8672ARZ
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
AD8628ARZ
✅ Прямая замена✓ В наличии
$1.49 / шт.
Открыть даташит →AD8676BRMZ Максимальные параметры и электрические характеристики
| Number of Channels | 2 |
| Amplifier Type | Precision, General Purpose |
| Тип выхода | Rail-to-Rail |
| Gain Bandwidth Product (GBP) | 10 MHz |
| Slew Rate (SR) | 2.5 V/us |
| Input Offset Voltage (Vos) | 12 uV (typical) |
| Input Offset Drift (dVos/dT) | 0.5 uV/C |
| Input Bias Current (Ib) | 2 nA |
| Voltage Noise Density (eN) | 2.8 nV/rtHz |
| Supply Voltage Range (single) | 5 V to 36 V |
| Supply Voltage Range (dual) | +/-2.5 V to +/-18 V |
| Quiescent Current (per channel) | 2.7 mA (typical) |
| Диапазон рабочих температур | -40 C to +125 C |
| Корпус | 8-MSOP (RM) |
| Тип монтажа | Surface Mount |
| Уровень MSL | 1 |
| Статус RoHS | Compliant |
Конфигурация выводов AD8676BRMZ
| Контакт 1 | OUT A — Output of channel A |
| Контакт 2 | IN- A — Inverting input of channel A |
| Контакт 3 | IN+ A — Non-inverting input of channel A |
| Контакт 4 | V- — Negative supply voltage |
| Контакт 5 | IN+ B — Non-inverting input of channel B |
| Контакт 6 | IN- B — Inverting input of channel B |
| Контакт 7 | OUT B — Output of channel B |
| Контакт 8 | V+ — Positive supply voltage |
Типичное применение
AD8676BRMZ подходит для 6 применениеs: Precision Instrumentation Amplifier Front End, Photodiode Transimpedance Amplifier, High-End Audio Line Driver and DAC Output Buffer, Strain Gauge and Load Cell Signal Conditioning, Thermocouple and RTD Temperature Sensing, Medical Instrumentation and Patient Monitoring.
Precision Instrumentation Amplifier Front End
The AD8676BRMZ's 12 uV input offset, 0.5 uV/C drift, and 2 nA input bias current make it an excellent precision input stage for instrumentation amplifiers in industrial measurement equipment. When configured as a three-op-amp IA front end, it preserves small thermocouple and strain-gauge signals over the full -40 C to +125 C temperature range. The 10 MHz GBP keeps AC accuracy high while the rail-to-rail output swing maximizes dynamic range on 5 V to 36 V supplies, common in 24 V industrial bus designs. Pair with the AD8421 for a complete precision signal chain.
Рекомендуется
Photodiode Transimpedance Amplifier
The AD8676BRMZ's 2.8 nV/rtHz voltage noise density and 2 nA input bias current suit it for transimpedance amplification of silicon photodiodes and PIN detectors in scientific instrumentation. The 10 MHz GBP supports wide-bandwidth optical receivers while the low input bias current minimizes DC error from photodiode leakage. Its rail-to-rail output enables direct ADC interfacing without level shifting. For pulse oximetry or LIDAR front ends, the part delivers low noise without the EMI susceptibility of chopper-stabilized alternatives.
Рекомендуется
High-End Audio Line Driver and DAC Output Buffer
The AD8676BRMZ delivers audio-grade performance with 2.8 nV/rtHz voltage noise and a 2.5 V/us slew rate sufficient for professional audio line drivers and DAC I/V output buffers. Its rail-to-rail output swing maximizes dynamic range on +/-15 V supplies commonly used in studio audio gear, while the low distortion preserves audio fidelity. Compared to general-purpose audio op amps, the AD8676 provides tighter DC offset for active crossover networks and balanced line transmitter designs.
Рекомендуется
Strain Gauge and Load Cell Signal Conditioning
For strain gauge and load cell signal conditioning, the AD8676BRMZ's 12 uV offset and 0.5 uV/C drift preserve low-frequency DC accuracy across wide temperature excursions in industrial weighing and force measurement systems. The 36 V supply tolerance supports 24 V industrial bus excitation rails. Used as a differential amplifier following the bridge, it rejects common-mode noise while the low bias current prevents loading of high-impedance sensors. Pair with the AD8421 for a complete bridge amplifier solution.
Рекомендуется
Thermocouple and RTD Temperature Sensing
The AD8676BRMZ is well suited to thermocouple and RTD temperature measurement front ends due to its 2 nA input bias current, 12 uV offset, and 0.5 uV/C drift. These characteristics translate small mV-level thermocouple signals into amplified voltages without corrupting DC accuracy across the -40 C to +125 C industrial range. The 36 V supply supports common 24 V industrial sensor excitation while the rail-to-rail output simplifies ADC interfacing. Use as a low-noise unity-gain buffer or in a precision gain stage for high-accuracy temperature transmitters.
Рекомендуется
Medical Instrumentation and Patient Monitoring
The AD8676BRMZ's combination of 2.8 nV/rtHz voltage noise and 2 nA input bias current makes it appropriate for ECG, EEG, and other patient-monitoring front ends where small biopotential signals must be amplified without DC drift or bias-current artifacts. The 36 V supply rating supports both portable battery-powered designs and line-powered bedside monitors. Compared to chopper-stabilized alternatives, the AD8676 avoids chopping artifacts that can interfere with sensitive medical measurements while delivering precision DC accuracy over the full industrial temperature range.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для AD8676BRMZ — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | AD8676ARZ | AD8676BRZ | AD8676ARMZ | AD8676BRMZ-REEL | AD8672ARZ | AD8628ARZ |
|---|---|---|---|---|---|---|---|
| Package | 8-MSOP (RM-8) | 8-SOIC (R-8) - different footprint, larger | 8-SOIC (R-8) - different footprint, larger | 8-MSOP (RM-8) - same | 8-MSOP (RM-8) - same | 8-SOIC (R-8) - different footprint | 8-SOIC (R-8) - different footprint |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Number of Channels | 2 (dual) | 2 | 2 | 2 | 2 | 2 | 2 |
| Supply Voltage Range | 5 V to 36 V (single) | 5 V to 36 V | 5 V to 36 V | 5 V to 36 V | 5 V to 36 V | +/-4.5 V to +/-18 V (narrower) | 2.7 V to 5 V (single), low-voltage |
| Output Type | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | Non-RRO | Rail-to-Rail |
| Gain Bandwidth Product | 10 MHz | 10 MHz | 10 MHz | 10 MHz | 10 MHz | 10 MHz | 2 MHz (lower BW) |
| Slew Rate | 2.5 V/us | 2.5 V/us | 2.5 V/us | 2.5 V/us | 2.5 V/us | 2.5 V/us | 1 V/us |
| Voltage Noise Density | 2.8 nV/rtHz | 2.8 nV/rtHz | 2.8 nV/rtHz | 2.8 nV/rtHz | 2.8 nV/rtHz | 2.8 nV/rtHz | 5 nV/rtHz (higher noise) |
| Input Offset Voltage | 12 uV (typical) | 12 uV | 12 uV | 12 uV | 12 uV | 10 uV (slightly better) | 1 uV (chopper-zero-drift) |
Ключевые отличия
- Rail-to-rail output swing on a wide 36 V supply (против AD8672ARZ)
- Higher bandwidth with equivalent precision noise (против AD8628ARZ)
- Pin-compatible MSOP package for dense layouts (против AD8676ARZ)
Заметки по проектированию
Place 0.1 uF decoupling capacitors as close as possible to the V+ and V- supply pins of the AD8676BRMZ, ideally within 2 mm of the package. Add a 10 uF bulk capacitor at the supply entry point of the PCB. This preserves PSRR and minimizes noise injection through the supply rails. Keep input traces short and shield them from digital and switching signals to prevent coupling of noise into the precision input stage.
Estimated: with 2.8 nV/rtHz voltage noise and a 10 kHz noise bandwidth, the input-referred RMS noise is approximately 0.28 uVrms. For photodiode transimpedance designs, choose feedback resistor values that put this op amp noise below the sensor shot noise. Maintain phase margin by adding a small compensation capacitor across the feedback resistor in high-gain transimpedance stages.
Do not exceed the absolute maximum supply voltage of 36 V on the AD8676BRMZ - operation above this damages the device. Avoid reverse-driving the input pins outside the supply rails. For unity-gain buffer configurations, verify that the output is not loaded below the datasheet minimum resistive load, which can cause output stage instability. The MSOP exposed pad (if present) should be soldered to a grounded copper pour for thermal dissipation.
Информация о соответствии
RoHS and REACH compliant per Analog Devices product page. Not AEC-Q100 qualified - this part targets industrial instrumentation rather than automotive. Lead-free reflow compatible with standard MSL1 floor life.
