ADA4522-1ARZ-RL7 - 55V Zero Drift Op Amp | Analog Devices
N.º da peça: ADA4522-1ARZ-RL7 ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $3.42 | $3,42 |
| 10 | $3.08 | $30,80 |
| 100 | $2.74 | $274,00 |
| 500 | $2.47 | $1.235,00 |
| 1.000 | $2.19 | $2.190,00 |
ADA4522-1ARZ-RL7 Visão geral
Zero-drift amplifiers, also known as chopper-stabilized or auto-zero amplifiers, are a class of operational amplifiers that continuously correct their input offset voltage and drift, achieving near-zero offset and drift over temperature and time. This makes them ideal for amplifying very small DC or low-frequency signals where offset errors would otherwise dominate. The ADA4522-1 belongs to the precision amplifier family, which includes instrumentation amplifiers and precision op amps, and is part of the broader analog signal chain in electronic systems.
Key features of the ADA4522-1ARZ-RL7 include a maximum offset voltage of 2.5 µV, a temperature drift of 0.012 µV/°C, and a voltage noise density of 5.8 nV/√Hz at 1 kHz. It also features EMI enhancement, which improves rejection of electromagnetic interference, and ground-sensing inputs that allow the input common-mode range to include the negative rail. The device operates over the full industrial temperature range of -40°C to +125°C.
Technically, the ADA4522-1 uses a proprietary chopper-stabilized architecture that combines a main amplifier with a nulling amplifier, achieving high DC precision without the need for external trimming. The device also includes an internal charge pump that allows the input common-mode range to extend to the negative supply, enabling true ground-sensing operation. This architecture provides excellent long-term stability and low 1/f noise, making it suitable for precision measurement applications.
Typical applications include precision weigh scales, thermocouple and RTD signal conditioning, medical instrumentation, and battery-powered systems where low power consumption is critical. The wide supply range also makes it suitable for industrial 24V systems and automotive battery monitoring.
When designing with this device, ensure proper decoupling of the power supply pins with 0.1 µF ceramic capacitors placed close to the device. The EMI enhancement feature reduces the need for external filtering, but for harsh EMI environments, additional input filtering may be beneficial.
Alternativas drop-in para ADA4522-1ARZ-RL7 — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com ADA4522-1ARZ-RL7 (mesmo formato e footprint) — diferindo em Input Common-Mode Range, Maximum Offset Voltage, Offset Voltage Drift, Package, Voltage Noise Density.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
ADA4522-1ARZ-R7
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
ADA4522-1ARZ
✅ Drop-In✓ Em estoque
$1.42 / unidade
Ver ficha técnica →ADA4522-2ARZ-R7
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
ADA4522-1ARZ-RL7 Classificações máximas e características elétricas
| Number of Channels | 1 |
| Supply Voltage Range | 4.5 V to 55 V |
| Maximum Offset Voltage | 2.5 µV |
| Offset Voltage Drift | 0.012 µV/°C |
| Voltage Noise Density | 5.8 nV/√Hz at 1 kHz |
| Gain Bandwidth Product | 6.5 MHz |
| Slew Rate | 1.5 V/µs |
| Input Common-Mode Range | Ground sensing (includes negative rail) |
| Tipo de saída | Rail-to-Rail |
| Supply Current (per channel) | 1.5 mA |
| Faixa de temperatura de operação | -40°C to +125°C |
| Encapsulamento | 8-Lead SOIC (SOIC-8) |
| Tipo de montagem | Surface Mount |
| EMI Enhanced | Yes |
| Status RoHS | Compliant |
Configuração de pinos do ADA4522-1ARZ-RL7
| Pino 1 | OUT A — Output of amplifier A |
| Pino 2 | -IN A — Inverting input of amplifier A |
| Pino 3 | +IN A — Non-inverting input of amplifier A |
| Pino 4 | V- — Negative supply or ground |
| Pino 5 | +IN B — Non-inverting input of amplifier B (not used in single version) |
| Pino 6 | -IN B — Inverting input of amplifier B (not used in single version) |
| Pino 7 | OUT B — Output of amplifier B (not used in single version) |
| Pino 8 | V+ — Positive supply |
Aplicações típicas
ADA4522-1ARZ-RL7 é adequado para 6 aplicaçãos: Precision Weigh Scales, Thermocouple Signal Conditioning, Medical Instrumentation, Industrial Process Control, Battery-Powered Systems, Automotive Sensor Interfaces.
Precision Weigh Scales
The ADA4522-1ARZ-RL7's ultra-low offset voltage (2.5 µV) and drift (0.012 µV/°C) ensure accurate measurement of load cell outputs. Its ground-sensing inputs allow direct connection to the sensor bridge, and the rail-to-rail output maximizes ADC input range. The wide supply range (up to 55V) accommodates industrial excitation voltages, while the low noise (5.8 nV/√Hz) preserves signal integrity. This makes it ideal for high-resolution weigh scales requiring long-term stability.
Recomendado
Thermocouple Signal Conditioning
Thermocouple outputs are low-level (µV) and require amplification with minimal offset error. The ADA4522-1ARZ-RL7's zero-drift architecture eliminates offset drift, ensuring accurate temperature measurement over time. Its low noise density (5.8 nV/√Hz) and EMI enhancement reduce interference in industrial environments. The wide supply range supports both 5V and 24V systems, and the rail-to-rail output interfaces directly with ADCs. This makes it a robust choice for industrial temperature monitoring.
Recomendado
Medical Instrumentation
In medical devices like patient monitors and diagnostic equipment, precision and reliability are critical. The ADA4522-1ARZ-RL7's low offset and drift ensure accurate biopotential measurements (ECG, EEG). Its low power consumption (1.5 mA) is suitable for battery-powered portable devices. The ground-sensing input allows single-supply operation, simplifying design. The wide temperature range (-40°C to +125°C) ensures operation in various clinical environments. This makes it ideal for high-accuracy medical instrumentation.
Recomendado
Industrial Process Control
Industrial process control systems require amplifiers that maintain accuracy over wide temperature ranges and in noisy environments. The ADA4522-1ARZ-RL7's zero-drift performance ensures stable operation from -40°C to +125°C. Its EMI enhancement reduces the need for external filtering, simplifying PCB design. The wide supply range (up to 55V) is compatible with 24V industrial buses. The rail-to-rail output allows direct interface with ADCs and microcontrollers. This makes it a reliable choice for process control loops.
Recomendado
Battery-Powered Systems
The ADA4522-1ARZ-RL7's low supply current (1.5 mA) and wide supply range (4.5V to 55V) make it ideal for battery-powered devices. Its rail-to-rail output maximizes dynamic range with low supply voltages. The ground-sensing input allows operation with a single cell. The zero-drift architecture ensures accuracy as battery voltage declines. This makes it suitable for portable instruments, wireless sensors, and other energy-constrained applications.
Recomendado
Automotive Sensor Interfaces
Automotive applications demand high reliability and precision over extreme temperatures. The ADA4522-1ARZ-RL7's wide supply range (up to 55V) handles automotive battery voltage transients. Its zero-drift performance ensures accurate sensor readings (pressure, temperature) over the vehicle's lifetime. The EMI enhancement improves immunity to electromagnetic interference from motors and ignition systems. The -40°C to +125°C temperature range covers under-hood environments. This makes it suitable for automotive sensor interfaces.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para ADA4522-1ARZ-RL7 — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | ADA4522-1ARZ-R7 | ADA4522-1ARZ | ADA4522-2ARZ-R7 | ADA4522-1ARMZ-R7 |
|---|---|---|---|---|---|
| Package | SOIC-8 | SOIC-8 | SOIC-8 | SOIC-8 | MSOP-8 |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Number of Channels | 1 | 1 | 1 | 2 | 1 |
| Supply Voltage Range | 4.5V to 55V | 4.5V to 55V | 4.5V to 55V | 4.5V to 55V | 4.5V to 55V |
| Offset Voltage (max) | 2.5 µV | 2.5 µV | 2.5 µV | 2.5 µV | 2.5 µV |
| Voltage Noise Density | 5.8 nV/√Hz | 5.8 nV/√Hz | 5.8 nV/√Hz | 5.8 nV/√Hz | 5.8 nV/√Hz |
| Gain Bandwidth Product | 6.5 MHz | 6.5 MHz | 6.5 MHz | 6.5 MHz | 6.5 MHz |
| Supply Current (per channel) | 1.5 mA | 1.5 mA | 1.5 mA | 1.5 mA | 1.5 mA |
Principais diferenciais
- Ultra-low offset voltage and drift (vs OPA2188AIDR)
- Wider supply voltage range (vs LTC2057HV)
- EMI enhancement (vs OPA2188AIDR)
Notas de projeto
The ADA4522-1ARZ-RL7 operates from 4.5V to 55V. For best performance, use a low-noise power supply and place 0.1 µF ceramic capacitors close to the V+ and V- pins. For high-frequency noise, add a 10 µF tantalum capacitor in parallel. The device has a supply current of 1.5 mA, so power dissipation is minimal, but ensure the supply voltage does not exceed the absolute maximum rating of 60V.
For optimal performance, place the ADA4522-1ARZ-RL7 on a PCB with a solid ground plane. Keep input traces short and shielded to minimize noise pickup. Use separate analog and digital ground planes if mixed-signal circuitry is present. The SOIC-8 package has a thermal pad on the bottom; solder it to a copper pour for improved thermal performance, though power dissipation is low.
Avoid exceeding the input common-mode range, which includes the negative rail but not the positive rail. The device is not intended for use as a comparator without external protection; if used as such, add series resistors to limit current. Also, ensure the output is not shorted to ground for extended periods, as this can cause overheating. For EMI-sensitive applications, the device's built-in EMI enhancement reduces the need for external filtering, but additional filtering may be required in harsh environments.
Informações de conformidade
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified; for automotive, consider ADA4522-1ARZ-RL7 is not qualified, but other ADI parts may be.
