ADA4897-2ARMZ - Dual Low Noise RRO Op Amp | Analog Devices
MPN: ADA4897-2ARMZ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.3 | $5.30 |
| 10 | $4.77 | $47.70 |
| 100 | $4.24 | $424.00 |
| 500 | $3.71 | $1,855.00 |
| 1,000 | $3.18 | $3,180.00 |
Drop-in alternatives for ADA4897-2ARMZ — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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View Datasheet →ADA4897-2ARMZ Maximum Ratings & Electrical Characteristics
| Number of Channels | 2 |
| Supply Voltage Range | 3 V to 10 V |
| Quiescent Current per Amplifier | 3 mA |
| Input Voltage Noise Density | 1 nV/√Hz |
| 1/f Noise Corner | 2.4 nV/√Hz at 10 Hz |
| Bandwidth | 230 MHz |
| Slew Rate | 120 V/µs |
| Spurious-Free Dynamic Range | 80 dBc at 2 MHz |
| Output Type | Rail-to-Rail |
| Input Type | Voltage Feedback |
| Package | 10-MSOP |
| Operating Temperature Range | -40°C to +125°C |
| RoHS Status | Compliant |
| Mounting Type | Surface Mount |
| Settling Time | 45 ns to 0.1% |
ADA4897-2ARMZ 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 voltage |
| 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 voltage |
| Pin 9 | NC — No connect |
| Pin 10 | NC — No connect |
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
ADA4897-2ARMZ is suitable for 6 applications: Ultrasound Equipment, Low Noise PLL Filters, High Performance ADC Drivers, High Speed Signal Conditioning, Portable Medical Devices, Communication Systems.
Ultrasound Equipment
The ADA4897-2ARMZ is ideal for ultrasound systems due to its low noise (1 nV/√Hz) and high bandwidth (230 MHz), which are essential for processing high-frequency echo signals with minimal distortion. The dual channel configuration allows for compact front-end designs, and the rail-to-rail output maximizes dynamic range for improved image quality. Its low power consumption (3 mA per channel) is beneficial for portable ultrasound devices.
Recommended
Low Noise PLL Filters
In phase-locked loop (PLL) circuits, the ADA4897-2ARMZ provides low noise amplification for loop filter components, ensuring stable and clean frequency synthesis. Its low voltage noise (1 nV/√Hz) minimizes phase noise contribution, while the high bandwidth (230 MHz) supports fast loop dynamics. The rail-to-rail output allows full control voltage swing, and the small MSOP package saves board space in RF modules.
Recommended
High Performance ADC Drivers
The ADA4897-2ARMZ is well-suited for driving high-speed ADCs, providing low noise and high bandwidth to preserve signal fidelity. Its low distortion (SFDR 80 dBc at 2 MHz) ensures accurate conversion, and the rail-to-rail output maximizes the ADC input range. The dual channel configuration is ideal for differential driving, and the fast settling time (45 ns) supports high sampling rates.
Recommended
High Speed Signal Conditioning
The ADA4897-2ARMZ excels in high speed signal conditioning applications such as video amplification and communication systems. Its 230 MHz bandwidth and 120 V/µs slew rate enable accurate reproduction of fast signals, while the low noise (1 nV/√Hz) preserves signal quality. The rail-to-rail output is beneficial for single-supply systems, and the low power consumption (3 mA) is advantageous for multi-channel designs.
Recommended
Portable Medical Devices
The ADA4897-2ARMZ is suitable for portable medical devices due to its low power consumption (3 mA per channel) and small MSOP package. Its low noise (1 nV/√Hz) is critical for accurate biopotential measurements, and the wide supply range (3 V to 10 V) accommodates battery voltages. The rail-to-rail output ensures maximum signal swing, and the high bandwidth supports fast signal acquisition.
Recommended
Communication Systems
In communication systems, the ADA4897-2ARMZ provides low noise amplification for IF and baseband signals. Its high SFDR (80 dBc at 2 MHz) ensures low distortion in multi-carrier environments, and the high bandwidth (230 MHz) supports wideband signals. The dual channel configuration is useful for I/Q processing, and the low power consumption is beneficial for high-density line cards.
Recommended
Recommended Products Summary
Engineering reference data for ADA4897-2ARMZ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADA4896-2ARMZ | ADA4807-2ARMZ | ADA4806-2ARMZ | ADA4805-2ARMZ |
|---|---|---|---|---|---|
| Package | 10-MSOP | 10-MSOP | 10-MSOP | 10-MSOP | 10-MSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Supply Voltage Range | 3 V to 10 V | 3 V to 10 V | 2.7 V to 5 V | 2.7 V to 5 V | 2.7 V to 5 V |
| Quiescent Current per Amplifier | 3 mA | 2.5 mA | 1 mA | 0.8 mA | 0.8 mA |
| Input Voltage Noise Density | 1 nV/√Hz | 1.2 nV/√Hz | 3.1 nV/√Hz | 4.5 nV/√Hz | 4.5 nV/√Hz |
| Bandwidth | 230 MHz | 230 MHz | 180 MHz | 100 MHz | 105 MHz |
| Slew Rate | 120 V/µs | 120 V/µs | 225 V/µs | 150 V/µs | 150 V/µs |
| SFDR | 80 dBc at 2 MHz | 80 dBc at 2 MHz | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
Key Differentiators
- Lowest input voltage noise in its class (vs ADA4807-2ARMZ)
- Higher bandwidth (vs ADA4806-2ARMZ)
- Higher slew rate (vs ADA4805-2ARMZ)
Design Notes
The ADA4897-2ARMZ operates from a 3 V to 10 V supply. Ensure the supply voltage is within this range and adequately decoupled. Use a 0.1 µF ceramic capacitor close to each supply pin and a 10 µF tantalum capacitor for bulk decoupling. This minimizes power supply noise and ensures stable operation.
For optimal performance, place the ADA4897-2ARMZ on a PCB with a solid ground plane. Keep the feedback network components close to the amplifier to minimize parasitic inductance. Use short, direct traces for the input and output connections to reduce noise pickup. The MSOP package has a thermal pad that should be soldered to the ground plane for improved thermal dissipation.
Avoid driving capacitive loads greater than 100 pF directly, as this can cause instability. If a larger capacitive load is required, add an isolation resistor in series with the output. Also, ensure the input common-mode voltage is within the specified range to prevent output phase reversal. Refer to the datasheet for detailed application circuits.
Compliance Information
RoHS compliant per distributor data. Other compliance information not specified in the provided data.
