ADA4528-1ARMZ - Zero-Drift RRIO Op Amp | Analog Devices
N.º de pieza: ADA4528-1ARMZ ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $3.5 | $3,50 |
| 10 | $3.15 | $31,50 |
| 100 | $2.8 | $280,00 |
| 500 | $2.45 | $1.225,00 |
| 1.000 | $2.1 | $2.100,00 |
ADA4528-1ARMZ Descripción general
A zero-drift amplifier is a type of operational amplifier that uses auto-zero or chopper techniques to continuously correct input offset voltage and its drift. This architecture achieves microvolt-level offset and near-zero drift, which is critical for high-gain precision amplification of low-level signals. In the signal chain hierarchy, the ADA4528-1 is a precision op amp, a subclass of operational amplifiers, which are fundamental building blocks in analog signal processing, instrumentation, and sensor interface circuits.
Key features include a wide supply range, high gain, excellent common-mode rejection ratio (CMRR) and power supply rejection ratio (PSRR), and rail-to-rail input and output swing. The device is specified over the extended industrial temperature range of -40°C to +125°C and is available in an 8-lead MSOP package. The ADA4528-1 is designed for applications requiring precision amplification of low-level signals, such as position and pressure sensors, strain gages, and medical instrumentation.
Technically, the ADA4528-1 employs a chopper-stabilized architecture that reduces offset and noise, achieving a typical input bias current of 300 pA. The device provides a gain-bandwidth product of 4 MHz and a slew rate of 1.5 V/µs, balancing speed and precision. Its low noise and high PSRR make it suitable for precision data acquisition and sensor conditioning.
Typical applications include precision sensor interfaces, medical instrumentation, weigh scales, and thermocouple amplifiers. The ADA4528-1's low offset and drift ensure accurate measurement over time and temperature, while its rail-to-rail output maximizes dynamic range in low-voltage systems.
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 input common-mode range includes both rails, but avoid exceeding the absolute maximum ratings to prevent damage.
Alternativas directas para ADA4528-1ARMZ — 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 ADA4528-1ARMZ (mismo factor de forma y huella) — difiere en Amplifier Type, Number of Circuits, Package / Case, RoHS Status, Slew Rate.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
ADA4528-2ARMZ
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$2.8 / unidad
Ver hoja de datos →AD8571ARMZ
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LTC2051CMS8#TRPBF
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
ADA4528-1ARMZ Valores máximos y características eléctricas
| Amplifier Type | Zero-Drift |
| Number of Circuits | 1 |
| Tipo de salida | Rail-to-Rail |
| Slew Rate | 1.5 V/µs |
| Gain Bandwidth Product | 4 MHz |
| Current - Input Bias | 300 pA |
| Voltage - Input Offset | 2.5 µV |
| Current - Supply | 1.5 mA |
| Current - Output / Channel | 30 mA |
| Voltage - Supply Span (Min) | 2.2 V |
| Voltage - Supply Span (Max) | 5.5 V |
| Temperatura de funcionamiento | -40°C to +125°C |
| Encapsulado / Carcasa | 8-MSOP |
| Tipo de montaje | Surface Mount |
| Estado RoHS | Compliant |
Configuración de pines de ADA4528-1ARMZ
| Pin 1 | OUT — Amplifier output |
| Pin 2 | -IN — Inverting input |
| Pin 3 | +IN — Non-inverting input |
| Pin 4 | V- — Negative supply |
| Pin 5 | NC — No connect |
| Pin 6 | NC — No connect |
| Pin 7 | V+ — Positive supply |
| Pin 8 | NC — No connect |
Aplicaciones típicas
ADA4528-1ARMZ es adecuado para 6 aplicacións: Precision Sensor Interface, Medical Instrumentation, Strain Gauge Amplifier, Thermocouple Amplifier, Battery-Powered Precision Circuits, Weigh Scale.
Precision Sensor Interface
The ADA4528-1ARMZ's ultra-low offset voltage (2.5 µV) and drift (0.015 µV/°C) make it ideal for amplifying low-level signals from position and pressure sensors. Its rail-to-rail input and output maximize dynamic range, while the low noise (97 nV p-p) ensures accurate measurement. The device operates from 2.2 V to 5.5 V, compatible with battery-powered sensor nodes. In a typical bridge sensor circuit, the ADA4528-1 is used as a differential amplifier, providing high CMRR to reject common-mode noise. The low input bias current (300 pA) minimizes errors when interfacing with high-impedance sensors.
Recomendado
Medical Instrumentation
In medical devices such as ECG and blood pressure monitors, the ADA4528-1ARMZ provides the precision and low noise required for accurate biopotential amplification. Its 2.5 µV offset and 0.015 µV/°C drift ensure stable readings over time and temperature. The device's low supply current (1.5 mA) is suitable for portable, battery-powered medical equipment. The rail-to-rail output allows direct interfacing with ADCs, while the high PSRR rejects power supply noise. The extended temperature range (-40°C to +125°C) supports sterilization and harsh clinical environments.
Recomendado
Strain Gauge Amplifier
The ADA4528-1ARMZ is ideal for strain gauge applications where low offset and drift are critical. Its 2.5 µV offset and 0.015 µV/°C drift ensure accurate measurement of micro-strain levels. The device's high gain and excellent CMRR reject common-mode noise in bridge configurations. With a supply range of 2.2 V to 5.5 V, it can be used in portable weighing systems. The low noise (97 nV p-p) allows resolution of small resistance changes. The rail-to-rail output maximizes the ADC input range, improving measurement resolution.
Recomendado
Thermocouple Amplifier
The ADA4528-1ARMZ's low offset voltage (2.5 µV) and drift (0.015 µV/°C) make it suitable for thermocouple signal conditioning, where small voltage changes represent temperature. The device's low input bias current (300 pA) minimizes errors from source impedance. Its rail-to-rail input and output allow direct interfacing with ADCs. The wide supply range supports both 3.3 V and 5 V systems. The high PSRR rejects noise from switching regulators, ensuring accurate temperature readings. The extended temperature range is ideal for industrial process control.
Recomendado
Battery-Powered Precision Circuits
The ADA4528-1ARMZ operates from 2.2 V to 5.5 V, making it ideal for battery-powered precision circuits. Its low supply current (1.5 mA) extends battery life in portable devices. The rail-to-rail input and output maximize dynamic range at low supply voltages. The zero-drift architecture ensures accuracy over the battery discharge curve. The device's small 8-MSOP package saves board space. Applications include portable instrumentation, field transmitters, and handheld meters.
Recomendado
Weigh Scale
The ADA4528-1ARMZ is well-suited for weigh scale applications, where precision and stability are paramount. Its 2.5 µV offset and 0.015 µV/°C drift ensure accurate weight measurements over time and temperature. The device's low noise (97 nV p-p) allows resolution of small weight changes. The rail-to-rail output maximizes the ADC input range, improving resolution. The wide supply range supports both battery and line-powered scales. The extended temperature range ensures reliable operation in industrial environments.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para ADA4528-1ARMZ — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | ADA4528-2ARMZ | AD8571ARMZ | LTC2051CMS8#TRPBF |
|---|---|---|---|---|
| Package | 8-MSOP | 8-MSOP | 8-MSOP | 8-MSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Number of Circuits | 1 | 2 | 1 | 2 |
| Input Offset Voltage | 2.5 µV | 2.5 µV | 1 µV | 0.5 µV |
| Input Offset Drift | 0.015 µV/°C | 0.015 µV/°C | 0.005 µV/°C | 0.01 µV/°C |
| Supply Voltage Range | 2.2 V to 5.5 V | 2.2 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| Gain Bandwidth Product | 4 MHz | 4 MHz | 1.5 MHz | 3 MHz |
| Supply Current | 1.5 mA | 1.5 mA | 850 µA | 1 mA |
Diferenciadores clave
- Ultra-low offset voltage of 2.5 µV (frente a LTC2051CMS8#TRPBF)
- Rail-to-rail input and output (frente a AD8571ARMZ)
- Extended temperature range (frente a LTC2051CMS8#TRPBF)
Notas de diseño
Bypass each supply pin with a 0.1 µF ceramic capacitor placed as close to the pin as possible. For best performance, use a 10 µF tantalum capacitor in parallel for low-frequency decoupling. The ADA4528-1 has excellent PSRR, but proper decoupling ensures optimal noise performance.
Keep the input traces short and shielded to minimize noise pickup. Use a ground plane under the device to reduce parasitic capacitance and improve stability. For high-impedance sensors, guard the input traces to prevent leakage currents.
Do not exceed the absolute maximum supply voltage of 6 V. The input common-mode range includes both rails, but avoid driving inputs beyond the rails. Ensure the output load does not exceed 30 mA to prevent thermal issues. For best offset performance, match the source impedance at both inputs.
Información de cumplimiento
RoHS compliant per distributor data. Other compliance info not specified in verified data.
