ADA4528-2ARMZ-RL7 - Zero-Drift Dual Op Amp | Analog Devices
MPN: ADA4528-2ARMZ-RL7 ✓ AktifADA4528-2ARMZ-RL7 Ringkasan
Zero-drift amplifiers, also known as auto-zero or chopper amplifiers, are a class of operational amplifiers that continuously correct their input offset voltage and drift using a switching technique. This results in extremely low offset voltage (typically 2 µV) and near-zero drift over temperature, making them essential for high-precision DC measurement systems. The ADA4528-2 belongs to the precision op amp family, which is a subset of linear amplifiers used in signal conditioning chains.
Key features include ultralow voltage noise density of 5.6 nV/√Hz, a gain-bandwidth product of 6.5 MHz, and a slew rate of 3.4 V/µs. The device also offers excellent CMRR and PSRR specifications, ensuring accurate amplification in noisy environments. The rail-to-rail input and output stages maximize dynamic range, particularly in low-voltage single-supply applications.
The ADA4528-2 uses a proprietary auto-zero architecture that eliminates 1/f noise, providing a flat noise spectrum down to DC. This makes it superior to conventional amplifiers for DC precision applications. The device is specified over the extended industrial temperature range of -40°C to +125°C, ensuring reliable operation in harsh environments.
Typical applications include precision sensor interfaces, thermocouple amplifiers, load cell signal conditioning, and battery-powered instrumentation. The low supply current of 1.5 mA per amplifier makes it suitable for portable devices.
When designing with this device, ensure proper decoupling of the power supply pins with 0.1 µF ceramic capacitors placed close to the IC. The input common-mode range includes both rails, allowing direct interface with sensors without level shifting.
Alternatif penggantian untuk ADA4528-2ARMZ-RL7 — paket yang sama, pin-pada-pin kompatibel. Bagian paket yang berbeda memerlukan kerja ulang PCB diabaikan.
Variasi di dalam seri ini
Model-series yang sama yang kompatibel dengan penggantian ADA4528-2ARMZ-RL7 (sama faktor bentuk dan footprint) — berbeda di dalam Slew Rate, RoHS Status, Amplifier Type, Bandwidth (-3 dB), Rail-to-Rail Input/Output.
ADA4528-2ARMZ-R7
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
ADA4528-2ARMZ
✅ Drop-In✓ Ada di Gudang
$2.8 / Satuan
Lihat Datasheet →ADA4522-2ARMZ-R7
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
ADA4528-2ARMZ-RL7 Rating Maksimal & Karakteristik Listrik
| Number of Channels | 2 |
| Supply Voltage Range | 2.2 V to 5.5 V |
| Supply Voltage Range (Dual) | ±1.1 V to ±2.75 V |
| Input Offset Voltage | 2 µV (typical) |
| Input Bias Current | 125 pA (typical) |
| Voltage Noise Density | 5.6 nV/√Hz |
| Gain Bandwidth Product | 6.5 MHz |
| Slew Rate | 3.4 V/µs |
| CMRR | 140 dB (typical) |
| PSRR | 140 dB (typical) |
| Rail-to-Rail Input/Output | Yes |
| Supply Current (per Amp) | 1.5 mA |
| Rentang Suhu Kerja | -40°C to +125°C |
| Paket | 8-MSOP |
| Tipe Mounting | Surface Mount |
| Status RoHS | Compliant |
Konfigurasi Pin ADA4528-2ARMZ-RL7
| Pin produk 1 | OUT A — Output of amplifier A |
| Pin produk 2 | -IN A — Inverting input of amplifier A |
| Pin produk 3 | +IN A — Non-inverting input of amplifier A |
| Pin produk 4 | V- — Negative supply (ground in single-supply operation) |
| Pin produk 5 | +IN B — Non-inverting input of amplifier B |
| Pin produk 6 | -IN B — Inverting input of amplifier B |
| Pin produk 7 | OUT B — Output of amplifier B |
| Pin produk 8 | V+ — Positive supply |
Aplikasi Umum
ADA4528-2ARMZ-RL7 cocok untuk 6 aplikasis: Precision Sensor Interfaces, Medical Instrumentation, Thermocouple Amplifiers, Battery-Powered Instrumentation, Weigh Scales and Load Cells, Data Acquisition Systems.
Precision Sensor Interfaces
The ADA4528-2's ultralow offset (2 µV) and drift make it ideal for amplifying signals from position sensors, pressure sensors, and strain gages. Its rail-to-rail input allows direct connection to sensor bridges without level shifting, and the low noise (5.6 nV/√Hz) preserves signal integrity. In a typical load cell interface, the op amp amplifies the millivolt-level bridge output to a range suitable for an ADC, achieving high accuracy over temperature.
Direkomendasikan
Medical Instrumentation
In medical devices such as patient monitors and diagnostic equipment, the ADA4528-2 provides the precision needed for biosignal amplification. Its low offset and drift ensure accurate DC measurements, while the low noise is critical for ECG and EEG signals that are in the microvolt range. The wide supply range (2.2 V to 5.5 V) allows operation from battery or USB power, and the small MSOP package saves board space in portable devices.
Direkomendasikan
Thermocouple Amplifiers
Thermocouples produce very small voltages (tens of microvolts per degree) that require high-gain, low-offset amplification. The ADA4528-2's zero-drift architecture eliminates offset drift that would otherwise cause temperature measurement errors. Its low bias current (125 pA) minimizes loading on the thermocouple, and the rail-to-rail output allows direct interface with ADCs. The device operates over the full industrial temperature range, making it suitable for process control and HVAC systems.
Direkomendasikan
Battery-Powered Instrumentation
The ADA4528-2's low supply current (1.5 mA per amplifier) and wide supply range make it ideal for battery-powered instruments. It can operate directly from a 3.3 V or 5 V rail, and its rail-to-rail output maximizes dynamic range for the ADC. The zero-drift feature ensures stable measurements over the battery's discharge cycle, and the small MSOP package is perfect for handheld devices. Applications include portable gas detectors, pH meters, and field transmitters.
Direkomendasikan
Weigh Scales and Load Cells
Load cell signals are typically a few millivolts at full scale, requiring precise amplification. The ADA4528-2's ultralow offset (2 µV) and drift ensure accurate weight readings over time and temperature. Its high CMRR (140 dB) rejects common-mode noise from the bridge supply, and the low noise (5.6 nV/√Hz) allows high resolution. The dual op amp can be used for both the main amplifier and a buffer for the reference voltage, simplifying the design.
Direkomendasikan
Data Acquisition Systems
In multi-channel data acquisition systems, the ADA4528-2 provides precision signal conditioning before the ADC. Its low offset and drift ensure accurate DC measurements, while the 6.5 MHz bandwidth supports higher-speed signals. The rail-to-rail output allows full-scale use of the ADC input range, and the dual configuration saves space. The device is ideal for industrial automation, test equipment, and environmental monitoring systems.
Direkomendasikan
Ringkasan Produk Direkomendasikan
Data referensi engineering untuk ADA4528-2ARMZ-RL7 — pembandingan, panduan desain, dan informasi konformitas.
Panduan Pemilihan
Pembandingan dengan Alternatif
| Parameter Umum | Produk Ini | ADA4528-2ARMZ-R7 | ADA4528-2ARMZ | ADA4522-2ARMZ-R7 |
|---|---|---|---|---|
| Package | 8-MSOP | 8-MSOP | 8-MSOP | 8-MSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Number of Channels | 2 | 2 | 2 | 2 |
| Input Offset Voltage | 2 µV | 2 µV | 2 µV | 10 µV |
| Voltage Noise Density | 5.6 nV/√Hz | 5.6 nV/√Hz | 5.6 nV/√Hz | 12 nV/√Hz |
| Gain Bandwidth Product | 6.5 MHz | 6.5 MHz | 6.5 MHz | 2.7 MHz |
| Supply Voltage Range | 2.2 V to 5.5 V | 2.2 V to 5.5 V | 2.2 V to 5.5 V | 2.7 V to 5.5 V |
| Rail-to-Rail I/O | Yes | Yes | Yes | Yes |
Diferensiator Kunci
- Ultralow offset voltage of 2 µV (vsADA4522-2ARMZ-R7)
- Lower voltage noise density (vsADA4522-2ARMZ-R7)
- Higher bandwidth (vsADA4522-2ARMZ-R7)
Catatan Desain
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 ADA4528-2 operates from 2.2 V to 5.5 V, so ensure the supply is clean and within this range to avoid output errors.
For optimal noise performance, keep the input traces short and shielded from digital signals. Use a ground plane under the op amp and avoid routing high-frequency signals near the inputs. The MSOP package has a thermal pad that should be soldered to a copper pour for better heat dissipation, though power dissipation is typically low.
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 by more than 0.3 V. For best offset performance, use metal-film resistors in the feedback network to minimize thermoelectric voltages.
Informasi Konformitas
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified.
