ADA4522-4ARUZ-RL7 - Quad 55V Zero-Drift Op Amp | Analog Devices
Référence : ADA4522-4ARUZ-RL7 ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $4.5 | $4,50 |
| 10 | $4.05 | $40,50 |
| 100 | $3.6 | $360,00 |
| 500 | $3.24 | $1 620,00 |
| 1 000 | $2.88 | $2 880,00 |
ADA4522-4ARUZ-RL7 Présentation
Zero-drift amplifiers are a class of operational amplifiers that use auto-zeroing or chopping techniques to continuously correct input offset voltage and drift. This results in extremely low offset voltage (typically 5 µV) and near-zero drift over temperature, making them ideal for precision signal conditioning. The ADA4522-4 belongs to the precision amplifier family, which includes chopper-stabilized and auto-zero amplifiers, and is part of the broader analog signal chain used in data acquisition and sensor interfaces.
Key features of the ADA4522-4ARUZ-RL7 include a typical input offset voltage of 5 µV, a gain bandwidth product of 2.5 MHz, and a low quiescent current of 1.5 mA per amplifier. It also offers a high common-mode rejection ratio (CMRR) of 140 dB and a power supply rejection ratio (PSRR) of 150 dB, ensuring excellent performance in noisy environments. The device is fully specified over the extended industrial temperature range of -40°C to +125°C.
Technically, the ADA4522-4 uses a proprietary auto-zero architecture that achieves a typical offset voltage drift of 0.002 µV/°C. The input stage is designed to sense ground-level signals, allowing true single-supply operation. The output stage is rail-to-rail, providing maximum dynamic range. The device also includes EMI filtering on the inputs, reducing susceptibility to radio-frequency interference.
Typical applications include precision weigh scales, thermocouple and RTD signal conditioning, medical instrumentation, and battery-powered systems. The wide supply range and low noise make it suitable for high-voltage industrial sensors and data acquisition systems.
When designing with this amplifier, ensure proper decoupling of the power supply pins with 0.1 µF ceramic capacitors placed close to the device. The ground-sensing input allows direct connection to ground-referenced sensors, but care must be taken to avoid exceeding the input common-mode range.
Alternatives de remplacement direct pour ADA4522-4ARUZ-RL7 — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
ADA4522-4ARUZ-R7
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ADA4522-4ARUZ
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ADA4522-4ARUZ-RL
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ADA4522-4ARUZ-RL7 Valeurs maximales et caractéristiques électriques
| Number of Channels | 4 |
| Supply Voltage Range | 4.5 V to 55 V |
| Dual Supply Voltage Range | ±2.25 V to ±27.5 V |
| Input Offset Voltage | 5 µV (typical) |
| Offset Voltage Drift | 0.002 µV/°C (typical) |
| Gain Bandwidth Product | 2.5 MHz |
| Quiescent Current per Amplifier | 1.5 mA |
| Common-Mode Rejection Ratio (CMRR) | 140 dB (typical) |
| Power Supply Rejection Ratio (PSRR) | 150 dB (typical) |
| Input Voltage Noise Density | 5.8 nV/√Hz at 1 kHz |
| Type de sortie | Rail-to-Rail |
| Input Type | Ground-Sensing |
| Plage de température de fonctionnement | -40°C to +125°C |
| Boîtier | 14-Lead TSSOP |
| Type de montage | Surface Mount |
| Statut RoHS | Compliant |
Configuration des broches de ADA4522-4ARUZ-RL7
| Broche 1 | OUT A — Output of amplifier A |
| Broche 2 | -IN A — Inverting input of amplifier A |
| Broche 3 | +IN A — Non-inverting input of amplifier A |
| Broche 4 | V+ — Positive power supply |
| Broche 5 | +IN B — Non-inverting input of amplifier B |
| Broche 6 | -IN B — Inverting input of amplifier B |
| Broche 7 | OUT B — Output of amplifier B |
| Broche 8 | OUT C — Output of amplifier C |
| Broche 9 | -IN C — Inverting input of amplifier C |
| Broche 10 | +IN C — Non-inverting input of amplifier C |
| Broche 11 | V- — Negative power supply (or ground in single-supply) |
| Broche 12 | +IN D — Non-inverting input of amplifier D |
| Broche 13 | -IN D — Inverting input of amplifier D |
| Broche 14 | OUT D — Output of amplifier D |
Applications typiques
ADA4522-4ARUZ-RL7 convient pour 6 applications: Precision Weigh Scales, Thermocouple Signal Conditioning, Industrial Process Control, Medical Instrumentation, Battery-Powered Systems, Data Acquisition Systems.
Precision Weigh Scales
The ADA4522-4ARUZ-RL7's ultra-low offset voltage of 5 µV and drift of 0.002 µV/°C ensure accurate weight measurements over time and temperature. Its high CMRR of 140 dB rejects common-mode noise from the bridge excitation, while the rail-to-rail output maximizes dynamic range. The quad configuration allows amplification of multiple load cells in a single package, reducing board space and cost. The wide supply range of 4.5V to 55V accommodates both battery-powered and industrial scales.
Recommandé
Thermocouple Signal Conditioning
The ADA4522-4ARUZ-RL7 is ideal for thermocouple signal conditioning due to its low offset and drift, which are critical for accurate temperature measurement. The ground-sensing input allows direct connection to the thermocouple's cold junction, simplifying the circuit. The low noise of 5.8 nV/√Hz ensures minimal signal degradation, and the wide supply range supports both 5V and 24V systems. The quad channel configuration can handle multiple thermocouple inputs, making it suitable for multi-channel data loggers.
Recommandé
Industrial Process Control
In industrial process control, the ADA4522-4ARUZ-RL7 provides precise signal conditioning for sensors such as pressure transmitters and flow meters. Its high PSRR of 150 dB ensures stable operation in noisy industrial environments with fluctuating power supplies. The extended temperature range of -40°C to +125°C allows deployment in harsh conditions. The quad configuration enables compact multi-channel control loops, reducing component count and improving reliability.
Recommandé
Medical Instrumentation
The ADA4522-4ARUZ-RL7 is well-suited for medical instrumentation such as patient monitors and diagnostic equipment, where precision and low noise are paramount. Its ultra-low offset and drift ensure accurate biopotential measurements, while the rail-to-rail output allows direct interface to ADCs. The low quiescent current of 1.5 mA per channel is beneficial for battery-powered portable devices. The device's EMI-enhanced inputs reduce interference from nearby electronics, improving signal integrity.
Recommandé
Battery-Powered Systems
For battery-powered systems, the ADA4522-4ARUZ-RL7 offers a balance of low power consumption and high precision. The 1.5 mA quiescent current per amplifier extends battery life, while the 4.5V minimum supply voltage is compatible with single-cell lithium-ion batteries. The ground-sensing input allows direct measurement of battery voltage without level shifting. The quad configuration reduces the number of components, saving board space and power.
Recommandé
Data Acquisition Systems
The ADA4522-4ARUZ-RL7 is a key component in data acquisition systems, providing precision signal conditioning for a variety of sensors. Its high CMRR and PSRR ensure accurate measurements in electrically noisy environments. The wide supply range allows operation from common industrial rails, and the rail-to-rail output maximizes ADC input range. The quad channel configuration enables simultaneous sampling of multiple signals, improving system throughput.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ADA4522-4ARUZ-RL7 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | ADA4522-4ARUZ-R7 | ADA4522-4ARUZ | ADA4522-4ARUZ-RL |
|---|---|---|---|---|
| Package | 14-Lead TSSOP | 14-Lead TSSOP | 14-Lead TSSOP | 14-Lead TSSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Number of Channels | 4 | 4 | 4 | 4 |
| Supply Voltage Range | 4.5V to 55V | 4.5V to 55V | 4.5V to 55V | 4.5V to 55V |
| Input Offset Voltage | 5 µV | 5 µV | 5 µV | 5 µV |
| Gain Bandwidth Product | 2.5 MHz | 2.5 MHz | 2.5 MHz | 2.5 MHz |
| Quiescent Current per Amplifier | 1.5 mA | 1.5 mA | 1.5 mA | 1.5 mA |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C |
Principaux différenciateurs
- Ultra-low offset voltage of 5 µV (vs ADA4522-2ARZ-RL7)
- Wide supply range up to 55V (vs ADA4522-1ARZ-RL7)
- Ground-sensing inputs (vs ADA4522-2ARZ-RL7)
Notes de conception
For optimal performance, bypass the V+ and V- pins with 0.1 µF ceramic capacitors placed as close to the pins as possible. Additionally, a 10 µF tantalum capacitor on each supply rail can help filter low-frequency noise. The ADA4522-4 has a PSRR of 150 dB, but external filtering ensures the power supply does not introduce noise into the signal path.
To minimize parasitic capacitance and noise pickup, keep the input traces short and shielded if necessary. The ground-sensing input allows direct connection to ground, but ensure the ground plane is continuous under the device. Use a solid ground plane to reduce EMI and improve thermal performance.
Do not exceed the absolute maximum supply voltage of 60V. Also, ensure the input common-mode voltage stays within the specified range (0V to V+ - 1.5V for single-supply). Exceeding these limits can damage the device or cause incorrect operation. Unused channels should be configured as buffers with inputs tied to mid-supply to avoid oscillation.
Informations de conformité
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified; for automotive, consider ADA4522-4ARUZ-R7 (same part, no automotive grade).
