ADA4528-2ARMZ-RL7 - Zero-Drift Dual Op Amp | Analog Devices
MPN: ADA4528-2ARMZ-RL7 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 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 |
Drop-in alternatives for ADA4528-2ARMZ-RL7 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADA4528-2ARMZ-R7
✅ Drop-In📋 Reference alternative (not in catalog)
ADA4528-2ARMZ
✅ Drop-In✓ In Stock
$2.8 / Unit
View Datasheet →ADA4522-2ARMZ-R7
✅ Drop-In📋 Reference alternative (not in catalog)
ADA4528-2ARMZ-RL7 Maximum Ratings & Electrical Characteristics
| 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 |
| Operating Temperature Range | -40°C to +125°C |
| Package | 8-MSOP |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
ADA4528-2ARMZ-RL7 Pin Configuration
| Pin 1 | OUT A — Output of amplifier A |
| Pin 2 | -IN A — Inverting input of amplifier A |
| Pin 3 | +IN A — Non-inverting input of amplifier A |
| Pin 4 | V- — Negative supply (ground in single-supply operation) |
| Pin 5 | +IN B — Non-inverting input of amplifier B |
| Pin 6 | -IN B — Inverting input of amplifier B |
| Pin 7 | OUT B — Output of amplifier B |
| Pin 8 | V+ — Positive supply |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
ADA4528-2ARMZ-RL7 is suitable for 6 applications: 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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
Recommended Products Summary
Engineering reference data for ADA4528-2ARMZ-RL7 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | 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 |
Key Differentiators
- Ultralow offset voltage of 2 µV (vs ADA4522-2ARMZ-R7)
- Lower voltage noise density (vs ADA4522-2ARMZ-R7)
- Higher bandwidth (vs ADA4522-2ARMZ-R7)
Design Notes
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.
Compliance Information
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified.
