ADA4897-1ARZ - 1nV/√Hz Low Noise Op Amp | Analog Devices
MPN: ADA4897-1ARZ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.85 | $4.85 |
| 10 | $4.36 | $43.60 |
| 100 | $3.88 | $388.00 |
| 500 | $3.49 | $1,745.00 |
| 1,000 | $3.1 | $3,100.00 |
Drop-in alternatives for ADA4897-1ARZ — 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:
ADA4895-1ARZ
✅ Drop-In✓ In Stock
$2.19 / Unit
View Datasheet →ADA4897-2ARZ
⚡ Same Package📋 Reference alternative (not in catalog)
OPA1612AIDR
✅ Drop-In📋 Reference alternative (not in catalog)
AD8099ARZ
✅ Drop-In📋 Reference alternative (not in catalog)
ADA4897-1ARZ Maximum Ratings & Electrical Characteristics
| Amplifier Type | Voltage Feedback |
| Number of Channels | 1 |
| Bandwidth (-3dB) | 230 MHz |
| Slew Rate | 120 V/µs |
| Supply Voltage Range | 3 V to 10 V |
| Quiescent Current | 3 mA per amplifier |
| Input Voltage Noise (wideband) | 1 nV/√Hz |
| Input Voltage Noise (1/f) | 2.4 nV/√Hz at 10 Hz |
| Input Offset Voltage | 0.5 mV (typical) |
| Spurious-Free Dynamic Range | -80 dBc at 2 MHz |
| Distortion | -115 dBc at 100 kHz, 2 V p-p |
| Output Type | Rail-to-Rail |
| Operating Temperature Range | -40°C to +125°C |
| Package | 8-SOIC (ARZ) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
ADA4897-1ARZ Pin Configuration
| Pin 1 | OUT — Amplifier output |
| Pin 2 | -IN — Inverting input |
| Pin 3 | +IN — Non-inverting input |
| Pin 4 | V- — Negative supply |
| Pin 5 | NC — No connect |
| Pin 6 | OUT — Amplifier output (duplicate) |
| Pin 7 | V+ — Positive supply |
| Pin 8 | 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
ADA4897-1ARZ is suitable for 6 applications: Low Noise Instrumentation, Active Filters, ADC Driver, Medical Imaging, Communications, Test and Measurement.
Low Noise Instrumentation
The ADA4897-1ARZ's ultra-low voltage noise of 1 nV/√Hz and high bandwidth of 230 MHz make it ideal for precision instrumentation amplifiers. In a typical data acquisition front-end, the op amp buffers sensor signals with minimal added noise, preserving signal integrity. Its rail-to-rail output maximizes dynamic range, and the low quiescent current of 3 mA is suitable for portable instruments. The high slew rate of 120 V/µs ensures fast settling for multiplexed inputs. Recommended companion products include the AD7172-2BRUZ ADC and the ADR4520 voltage reference.
Recommended
Active Filters
The ADA4897-1ARZ is well-suited for active filter designs, such as low-pass and high-pass filters in communication systems. Its 230 MHz bandwidth allows for high-frequency filtering, while the low noise ensures a clean signal path. The unity-gain stability simplifies filter design, and the rail-to-rail output allows maximum signal swing. In a multiple-feedback topology, the op amp's high slew rate prevents distortion at high frequencies. The low offset voltage of 0.5 mV reduces DC errors. Recommended companion products include precision resistors and capacitors from YAGEO and Murata.
Recommended
ADC Driver
The ADA4897-1ARZ is an excellent choice for driving high-speed ADCs, such as the AD7172-2BRUZ. Its low noise and high bandwidth ensure that the ADC's performance is not degraded by the driver. The rail-to-rail output allows the ADC input to swing close to the supply rails, maximizing the dynamic range. The low distortion of -115 dBc at 100 kHz ensures accurate conversion. The op amp's high slew rate supports fast-settling signals. Recommended companion products include the AD7172-2BRUZ ADC and a low-jitter clock source.
Recommended
Medical Imaging
In medical imaging systems, such as ultrasound and MRI, the ADA4897-1ARZ provides the low noise and high bandwidth required for processing weak sensor signals. Its 1 nV/√Hz noise floor is critical for detecting small signals, and the 230 MHz bandwidth supports high-frequency ultrasound transducers. The low power consumption of 3 mA is beneficial for portable devices. The rail-to-rail output ensures compatibility with ADC inputs. The op amp's reliability over the industrial temperature range makes it suitable for medical equipment. Recommended companion products include the AD7172-2BRUZ ADC and the ADR4520 reference.
Recommended
Communications
The ADA4897-1ARZ is used in communication systems for signal conditioning in base stations and software-defined radios. Its high bandwidth and low noise are essential for processing RF and IF signals. The spurious-free dynamic range of -80 dBc at 2 MHz ensures low intermodulation distortion. The op amp's low power consumption is advantageous in power-sensitive designs. The rail-to-rail output allows direct interface to ADCs. Recommended companion products include the AD9361BBCZ transceiver and the ADCLK905 clock buffer.
Recommended
Test and Measurement
The ADA4897-1ARZ is ideal for test and measurement equipment, such as oscilloscopes and spectrum analyzers. Its high bandwidth and fast slew rate enable accurate reproduction of high-speed signals. The low noise ensures precise measurements, and the low offset voltage reduces DC errors. The op amp's unity-gain stability allows use in buffer and probe circuits. The rail-to-rail output maximizes the display range. Recommended companion products include the AD7172-2BRUZ ADC for digitization and the ADR4520 reference for calibration.
Recommended
Recommended Products Summary
Engineering reference data for ADA4897-1ARZ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADA4895-1ARZ | OPA1612AIDR | AD8099ARZ |
|---|---|---|---|---|
| Package | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC |
| Brand | Analog Devices | Analog Devices | Texas Instruments | Analog Devices |
| Bandwidth | 230 MHz | 230 MHz | 80 MHz | 3.8 GHz |
| Slew Rate | 120 V/µs | 120 V/µs | 27 V/µs | 1350 V/µs |
| Input Voltage Noise | 1 nV/√Hz | 1.1 nV/√Hz | 1.1 nV/√Hz | 0.95 nV/√Hz |
| Quiescent Current | 3 mA | 1.5 mA | 3.6 mA | 15 mA |
| Supply Voltage Range | 3V to 10V | 3V to 10V | 4.5V to 36V | 5V to 12V |
| Output Type | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail | Rail-to-Rail |
Key Differentiators
- Ultra-low voltage noise of 1 nV/√Hz (vs ADA4895-1ARZ)
- Higher bandwidth of 230 MHz (vs OPA1612AIDR)
- Lower quiescent current of 3 mA (vs AD8099ARZ)
Design Notes
Ensure proper power supply decoupling. Place a 0.1 µF ceramic capacitor as close as possible to each supply pin (V+ and V-) and a 10 µF tantalum capacitor at the supply rails. This minimizes high-frequency noise and prevents oscillation, especially at high gains.
For optimal noise performance, use a ground plane and keep the input traces short and shielded. Avoid routing high-speed digital signals near the input pins. Use surface-mount components to reduce parasitic inductance. The SOIC package has a thermal pad; solder it to a copper pour for better heat dissipation.
Do not exceed the absolute maximum supply voltage of 12V. The input common-mode range extends to the rails, but avoid driving inputs beyond the rails to prevent latch-up. Also, ensure the load capacitance is within the specified range to maintain stability; for capacitive loads >100 pF, add a series resistor.
Compliance Information
RoHS compliant per Analog Devices product page. No AEC-Q100 qualification indicated for this part.
