ADA4528-1ARMZ-RL7 - Zero-Drift Op Amp | Analog Devices
MPN: ADA4528-1ARMZ-RL7 ✓ Hoạt độngADA4528-1ARMZ-RL7 Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho ADA4528-1ARMZ-RL7 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với ADA4528-1ARMZ-RL7 (cùng hình factor và footprint) — khác nhau ở Amplifier Type, Number of Circuits, Package / Case, RoHS Status, Slew Rate.
ADA4528-1ARMZ-R7
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ADA4528-2ARMZ
✅ Drop-In ⚠️ Thông số chưa được xác minh✓ Còn hàng
$2.8 / Đơn vị
Xem tài liệu →LTC2051CMS8#TRPBF
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ADA4528-1ARMZ-RL7 Tỷ lệ tối đa & tính chất điện
| Amplifier Type | Zero-Drift |
| Number of Circuits | 1 |
| Kiểu đầu ra | 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 |
| Nhiệt độ hoạt động | -40°C to +125°C |
| Hộp / Vỏ | 8-MSOP |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
Cấu hình chân ADA4528-1ARMZ-RL7
| Chân 1 | OUT — Amplifier output |
| Chân 2 | -IN — Inverting input |
| Chân 3 | +IN — Non-inverting input |
| Chân 4 | V- — Negative supply |
| Chân 5 | SD — Shutdown (active low) |
| Chân 6 | NC — No connect |
| Chân 7 | V+ — Positive supply |
| Chân 8 | NC — No connect |
Ứng dụng tiêu biểu
ADA4528-1ARMZ-RL7 phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ADA4528-1ARMZ-RL7 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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 |
Bảo phân biệt quan trọng
- Ultralow offset voltage of 2.5 µV max (vsLTC2051CMS8#TRPBF)
- Wide supply range of 2.2 V to 5.5 V (vsLTC2051CMS8#TRPBF)
- Shutdown feature for power saving (vsADA4528-1ARMZ-R7)
Ghi chú thiết kế
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.
Thông tin tuân thủ
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified.
