AD8674ARZ - Quad Precision Low Noise Op Amp | Analog Devices
N.º de pieza: AD8674ARZ ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $4.82 | $4,82 |
| 10 | $4.35 | $43,50 |
| 100 | $3.88 | $388,00 |
| 500 | $3.49 | $1.745,00 |
| 1.000 | $3.1 | $3.100,00 |
AD8674ARZ Descripción general
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 configurations such as inverting, non-inverting, differential, and instrumentation amplifiers. Op amps are essential in signal conditioning, filtering, and data acquisition systems, where they buffer, amplify, and shape analog signals. The AD8674 belongs to the precision op amp category, which prioritizes low offset voltage, low noise, and low drift over raw speed.
Key features of the AD8674ARZ include ultra-low input voltage noise of 2.8 nV/√Hz, low input bias current of 1.5 nA, and a typical offset voltage of 10 µV. The amplifier is stable with capacitive loads up to 1000 pF, making it robust for driving long cables or high-capacitance ADC inputs. It also features a high open-loop gain of 126 dB and a common-mode rejection ratio of 120 dB, ensuring accurate signal reproduction.
The AD8674 uses a bipolar process technology that achieves excellent DC precision without the need for chopping or auto-zeroing. This results in low noise and low power consumption, with a quiescent current of 2.5 mA per amplifier. The device operates over the industrial temperature range of -40°C to +125°C, making it suitable for harsh environments.
Typical applications include precision data acquisition systems, medical instrumentation, industrial process control, and active filters. The quad configuration saves board space and reduces cost compared to using four single op amps. The AD8674ARZ is a drop-in replacement for many industry-standard quad op amps, offering superior noise and offset performance.
When designing with the AD8674ARZ, ensure proper power supply decoupling with 0.1 µF ceramic capacitors close to the supply pins. The input common-mode range extends to the negative rail, but for best performance, keep inputs within the specified range. The output can swing within 1.5 V of the rails, so consider this when driving ADC inputs.
Alternativas directas para AD8674ARZ — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con AD8674ARZ (mismo factor de forma y huella) — difiere en Capacitive Load Stability, Input Bias Current, Supply Voltage Range, Input Offset Voltage, Package.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
AD8674AR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
AD8674BRZ
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$3.09 / unidad
Ver hoja de datos →OP4177ARZ
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
OPA4277UA
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
ADA4077-4ARZ
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
AD8674ARZ Valores máximos y características eléctricas
| Amplifier Type | General Purpose |
| Number of Circuits | 4 |
| Gain Bandwidth Product | 10 MHz |
| Slew Rate | 4 V/µs |
| Supply Voltage Range | ±5 V to ±15 V |
| Input Offset Voltage | 10 µV (typical) |
| Input Bias Current | 1.5 nA (typical) |
| Input Voltage Noise Density | 2.8 nV/√Hz |
| Open-Loop Gain | 126 dB |
| Common-Mode Rejection Ratio | 120 dB |
| Capacitive Load Stability | 1000 pF |
| Quiescent Current (per amp) | 2.5 mA |
| Rango de temperatura de funcionamiento | -40°C to +125°C |
| Encapsulado | 14-SOIC |
| Tipo de montaje | Surface Mount |
| Estado RoHS | Compliant |
Configuración de pines de AD8674ARZ
| Pin 1 | OUT A — Output of amplifier A |
| Pin 2 | -IN A — Inverting input of amplifier A |
| Pin 3 | +IN A — Non-inverting input of amplifier A |
| Pin 4 | V+ — Positive supply |
| Pin 5 | +IN B — Non-inverting input of amplifier B |
| Pin 6 | -IN B — Inverting input of amplifier B |
| Pin 7 | OUT B — Output of amplifier B |
| Pin 8 | OUT C — Output of amplifier C |
| Pin 9 | -IN C — Inverting input of amplifier C |
| Pin 10 | +IN C — Non-inverting input of amplifier C |
| Pin 11 | V- — Negative supply |
| Pin 12 | +IN D — Non-inverting input of amplifier D |
| Pin 13 | -IN D — Inverting input of amplifier D |
| Pin 14 | OUT D — Output of amplifier D |
Aplicaciones típicas
AD8674ARZ es adecuado para 6 aplicacións: Precision Data Acquisition Systems, Medical Instrumentation, Industrial Process Control, Active Filters, Audio Signal Processing, Test and Measurement Equipment.
Precision Data Acquisition Systems
The AD8674ARZ's low noise (2.8 nV/√Hz) and low offset voltage (10 µV) make it ideal for signal conditioning in data acquisition systems. It can buffer and amplify sensor signals before ADC conversion, ensuring high accuracy. The quad configuration allows multiple channels to be processed in a single IC, reducing board space and cost. Its high open-loop gain (126 dB) and CMRR (120 dB) reject common-mode noise, improving system performance.
Recomendado
Medical Instrumentation
In medical devices like ECG and EEG monitors, the AD8674ARZ provides low-noise amplification of bio-potential signals. Its low input bias current (1.5 nA) minimizes loading on high-impedance electrodes, and its low offset voltage reduces baseline drift. The wide temperature range (-40°C to +125°C) ensures reliability in clinical environments. The quad package enables multi-channel monitoring in a compact form factor.
Recomendado
Industrial Process Control
The AD8674ARZ is well-suited for industrial process control loops, where it amplifies signals from sensors like thermocouples and RTDs. Its high CMRR (120 dB) rejects interference from motors and power lines, while its low noise ensures accurate measurement. The device operates from ±15V supplies, common in industrial systems, and its robust design handles harsh conditions. The quad configuration allows multiple control loops to be implemented efficiently.
Recomendado
Active Filters
The AD8674ARZ's 10 MHz bandwidth and 4 V/µs slew rate make it suitable for active filter designs, such as low-pass and band-pass filters in communication systems. Its low noise and distortion preserve signal quality, while its stability with capacitive loads allows direct driving of filter capacitors. The quad package enables multi-stage filters in a single IC, simplifying design and reducing component count.
Recomendado
Audio Signal Processing
In professional audio equipment, the AD8674ARZ provides low-noise amplification for mixing consoles and equalizers. Its 2.8 nV/√Hz noise floor is low enough for high-fidelity audio, and its low distortion ensures transparent signal reproduction. The device operates from ±15V supplies, typical in audio gear, and its quad configuration allows multiple audio channels to be processed in one IC, reducing cost and board space.
Recomendado
Test and Measurement Equipment
The AD8674ARZ is used in test and measurement instruments like oscilloscopes and multimeters, where precision and low noise are critical. Its high open-loop gain and low offset voltage ensure accurate signal measurement, while its wide bandwidth supports high-frequency signals. The quad configuration allows multiple measurement channels to be implemented compactly, and its industrial temperature range ensures reliable operation in lab and field environments.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para AD8674ARZ — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | AD8674AR | AD8674BRZ | OP4177ARZ | OPA4277UA | ADA4077-4ARZ |
|---|---|---|---|---|---|---|
| Package | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments | Analog Devices |
| Number of Channels | 4 | 4 | 4 | 4 | 4 | 4 |
| Gain Bandwidth Product | 10 MHz | 10 MHz | 10 MHz | 10 MHz | 1 MHz | 3.9 MHz |
| Slew Rate | 4 V/µs | 4 V/µs | 4 V/µs | 2.5 V/µs | 0.8 V/µs | 1.2 V/µs |
| Input Offset Voltage (max) | 75 µV | 75 µV | 50 µV | 50 µV | 50 µV | 25 µV |
| Input Bias Current (max) | 2 nA | 2 nA | 2 nA | 2 nA | 2 nA | 1.5 nA |
| Voltage Noise Density | 2.8 nV/√Hz | 2.8 nV/√Hz | 2.8 nV/√Hz | 3.8 nV/√Hz | 8 nV/√Hz | 2.2 nV/√Hz |
Diferenciadores clave
- Lower input voltage noise (2.8 nV/√Hz) compared to OP4177ARZ (3.8 nV/√Hz) (frente a OP4177ARZ)
- Higher slew rate (4 V/µs) vs OPA4277UA (0.8 V/µs) (frente a OPA4277UA)
- Wider bandwidth (10 MHz) vs ADA4077-4ARZ (3.9 MHz) (frente a ADA4077-4ARZ)
Notas de diseño
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 maintain stability during transient load changes. Proper decoupling is critical for achieving the low noise performance specified in the datasheet.
For optimal noise performance, keep the input traces short and shielded from digital signals. Use a ground plane under the op amp to minimize parasitic capacitance and noise pickup. Avoid routing high-frequency digital lines near the input pins, as this can couple noise into the amplifier.
Do not exceed the absolute maximum supply voltage of ±18V. Also, ensure the input common-mode voltage stays within the specified range to avoid phase reversal. When driving capacitive loads, verify stability with the actual load capacitance, as the 1000 pF stability is typical but may vary with supply voltage and temperature.
Información de cumplimiento
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified. Lead-free finish indicated by 'Z' suffix.
