ADA4528-1ARMZ-RL7 - Zero-Drift Op Amp | Analog Devices
MPN： ADA4528-1ARMZ-RL7 ✓ 啟用中ADA4528-1ARMZ-RL7 概覽
A zero-drift amplifier is an op amp that uses auto-zero or chopper techniques to continuously correct offset voltage and drift, achieving near-zero offset and drift over temperature and time. This makes it ideal for precision amplification of low-level signals where offset errors would otherwise dominate. The ADA4528-1 belongs to the family of precision operational amplifiers, which are essential building blocks in sensor signal conditioning, medical instrumentation, and industrial measurement systems.
Key features include an ultralow offset voltage of 2.5 µV (max), a temperature drift of 0.015 µV/°C, and a low input bias current of 90 pA (typical). The amplifier provides a gain-bandwidth product of 4 MHz and a slew rate of 1.2 V/µs. It also features excellent CMRR and PSRR specifications, both exceeding 130 dB, which reject common-mode and power supply noise. The rail-to-rail input and output stages allow maximum dynamic range in low-voltage applications.
The ADA4528-1 uses a proprietary auto-zero architecture that continuously samples and corrects the input offset, achieving a typical offset voltage of 0.3 µV and a drift of 0.002 µV/°C. This results in exceptional DC accuracy over the full temperature range. The device also includes a shutdown feature that reduces supply current to 0.5 µA, enabling power savings in battery-operated systems.
Typical applications include precision sensor signal conditioning for position and pressure sensors, strain gages, medical instrumentation such as ECG and blood glucose monitors, and precision current sensing in industrial control systems. The low noise and high PSRR make it suitable for high-resolution ADC driver circuits.
When designing with this device, ensure proper decoupling of the supply pins with 0.1 µF ceramic capacitors placed close to the device. The shutdown pin can be used for power sequencing, but must be driven to a valid logic level to avoid undefined states.
直接替換替代品，適用於 ADA4528-1ARMZ-RL7 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： ADA4528-1ARMZ-RL7 （相同外形與佔位） — 差異在於 Amplifier Type, Number of Circuits, Package / Case, RoHS Status, Slew Rate.
ADA4528-1ARMZ-R7
✅ 直接替換📋 參考替代品（不在目錄中）
ADA4528-2ARMZ
✅ 直接替換 ⚠️ 規格未經驗證✓ 有庫存
$2.8 / 單位
查看資料表 →LTC2051CMS8#TRPBF
✅ 直接替換📋 參考替代品（不在目錄中）
ADA4528-1ARMZ-RL7 最大額定值與電氣特性
| Amplifier Type | Zero-Drift |
| Number of Circuits | 1 |
| 輸出類型 | Rail-to-Rail |
| Slew Rate | 1.2 V/µs |
| Gain Bandwidth Product | 4 MHz |
| Current - Input Bias | 90 pA |
| Voltage - Input Offset | 2.5 µV (max) |
| Current - Supply | 1.5 mA |
| Current - Output / Channel | 30 mA |
| Voltage - Supply Span (Min) | 2.2 V |
| Voltage - Supply Span (Max) | 5.5 V |
| 工作溫度 | -40°C to +125°C |
| 封裝 / 外殼 | 8-MSOP |
| 安裝類型 | Surface Mount |
| RoHS 狀態 | Compliant |
ADA4528-1ARMZ-RL7 腳位配置
| 腳位 1 | OUT — Amplifier output |
| 腳位 2 | -IN — Inverting input |
| 腳位 3 | +IN — Non-inverting input |
| 腳位 4 | V- — Negative supply |
| 腳位 5 | SD — Shutdown (active low) |
| 腳位 6 | NC — No connect |
| 腳位 7 | V+ — Positive supply |
| 腳位 8 | NC — No connect |
典型應用
ADA4528-1ARMZ-RL7 適用於 6 應用s: Precision Sensor Signal Conditioning, Medical Instrumentation, Strain Gage Amplifier, Battery-Powered Precision Systems, High-Resolution ADC Driver, Industrial Process Control.
Precision Sensor Signal Conditioning
The ADA4528-1ARMZ-RL7's ultralow offset voltage (2.5 µV max) and low drift (0.015 µV/°C) make it ideal for amplifying small signals from position and pressure sensors. Its high CMRR (130 dB) rejects common-mode noise, ensuring accurate measurement in industrial environments. The rail-to-rail output allows direct interface to ADCs without additional level shifting.
推薦
Medical Instrumentation
In medical devices like ECG and blood glucose monitors, the ADA4528-1ARMZ-RL7 provides the precision needed for low-level biological signals. Its low input bias current (90 pA) minimizes errors when interfacing with high-impedance electrodes. The 2.2 V to 5.5 V supply range supports battery operation, and the shutdown feature reduces power consumption to 0.5 µA in standby.
推薦
Strain Gage Amplifier
The ADA4528-1ARMZ-RL7 is well-suited for strain gage bridge amplifiers due to its excellent DC accuracy and low noise. The zero-drift architecture eliminates offset drift over temperature, which is critical for accurate strain measurement. Its high PSRR (130 dB) rejects power supply noise, and the rail-to-rail output maximizes dynamic range for the ADC.
推薦
Battery-Powered Precision Systems
With a supply range of 2.2 V to 5.5 V and a quiescent current of 1.5 mA, the ADA4528-1ARMZ-RL7 is ideal for battery-powered precision systems. The shutdown pin reduces supply current to 0.5 µA, extending battery life in portable devices. Its rail-to-rail I/O ensures maximum signal swing at low supply voltages, making it suitable for portable instrumentation and IoT sensors.
推薦
High-Resolution ADC Driver
The ADA4528-1ARMZ-RL7's low noise and high PSRR make it an excellent driver for high-resolution ADCs. Its 4 MHz gain bandwidth and 1.2 V/µs slew rate are sufficient for precision data acquisition systems. The rail-to-rail output allows full-scale ADC input range, and the low offset ensures no DC error is introduced into the conversion.
推薦
Industrial Process Control
In industrial process control, the ADA4528-1ARMZ-RL7 provides accurate amplification of 4-20 mA loop signals and thermocouple outputs. Its wide supply range and high CMRR reject common-mode interference from long cable runs. The device's -40°C to +125°C operating range ensures reliable performance in harsh environments.
推薦
推薦產品摘要
工程參考資料，適用於 ADA4528-1ARMZ-RL7 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | ADA4528-1ARMZ-R7 | ADA4528-1ACPZ-R7 | LTC2051CMS8#TRPBF |
|---|---|---|---|---|
| Package | 8-MSOP | 8-MSOP | 8-LFCSP | 8-MSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Number of Channels | 1 | 1 | 1 | 1 |
| 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 11 V |
| Input Offset Voltage (max) | 2.5 µV | 2.5 µV | 2.5 µV | 0.5 µV |
| Input Bias Current | 90 pA | 90 pA | 90 pA | 20 pA |
| Gain Bandwidth Product | 4 MHz | 4 MHz | 4 MHz | 3 MHz |
| Slew Rate | 1.2 V/µs | 1.2 V/µs | 1.2 V/µs | 2 V/µs |
主要差異化特點
- Ultralow offset voltage of 2.5 µV max (對比LTC2051CMS8#TRPBF)
- Wide supply range of 2.2 V to 5.5 V (對比LTC2051CMS8#TRPBF)
- Shutdown feature for power saving (對比ADA4528-1ARMZ-R7)
設計說明
Decouple the V+ and V- pins with 0.1 µF ceramic capacitors placed as close to the device as possible. For best performance, use a 10 µF tantalum capacitor in parallel for low-frequency decoupling. The ADA4528-1 has a supply current of 1.5 mA, so ensure the power supply can handle this without significant voltage drop.
For optimal noise performance, keep the input traces short and shielded from digital signals. Use a ground plane under the device to minimize parasitic capacitance. The MSOP package has a thermal pad that should be soldered to the PCB for improved thermal performance, though power dissipation is typically low.
The shutdown pin (SD) is active low and must be tied to V+ if not used. Leaving it floating can cause undefined behavior. Also, avoid exceeding the absolute maximum supply voltage of 6 V, as this can damage the device. Ensure input voltages do not exceed the supply rails by more than 0.3 V.
合規資訊
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified.
