ADA4895-2ARZ - Dual 1nV/√Hz High Speed Op Amp | Analog Devices
MPN: ADA4895-2ARZ ✓ 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 ADA4895-2ARZ — 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:
ADA4895-2ARMZ
✅ Drop-In📋 Reference alternative (not in catalog)
ADA4895-2ARMZ-RL
✅ Drop-In📋 Reference alternative (not in catalog)
ADA4897-2ARMZ
✅ Drop-In✓ In Stock
$3.18 / Unit
View Datasheet →ADA4895-2ARZ Maximum Ratings & Electrical Characteristics
| Number of Channels | 2 |
| Amplifier Type | Voltage Feedback |
| Gain Bandwidth Product | 146 MHz (at G=+10) |
| Slew Rate | 943 V/μs |
| Input Voltage Noise (1/f) | 2 nV/√Hz at 10 Hz |
| Spurious-Free Dynamic Range | -72 dBc at 2 MHz |
| Quiescent Current per Amplifier | 3 mA |
| Supply Voltage Range | 3 V to 10 V |
| Output Type | Rail-to-Rail |
| Settling Time (0.1%) | 22 ns |
| Minimum Stable Gain | 10 |
| Operating Temperature Range | -40°C to +125°C |
| Package | 10-Lead MSOP |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
ADA4895-2ARZ 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
ADA4895-2ARZ is suitable for 6 applications: Ultrasound Imaging, Low Noise Preamplifiers, High Speed Data Acquisition, Active Filters, Portable Instrumentation, Communications Receivers.
Ultrasound Imaging
The ADA4895-2's low input noise of 2 nV/√Hz at 10 Hz and high SFDR of -72 dBc at 2 MHz make it ideal for ultrasound signal conditioning. In an ultrasound receiver, the amplifier boosts the tiny echo signals from the transducer while maintaining signal integrity. The high bandwidth of 146 MHz ensures that the fast-rising pulses are accurately amplified, and the rail-to-rail output maximizes dynamic range. The low quiescent current of 3 mA per amplifier is beneficial for portable ultrasound devices where power consumption is critical. The wide supply range of 3 V to 10 V allows operation from a single lithium-ion battery or a regulated 5 V rail.
Recommended
Low Noise Preamplifiers
The ADA4895-2 is an excellent choice for low noise preamplifiers in applications such as audio, instrumentation, and sensor interfaces. Its 1/f noise of 2 nV/√Hz at 10 Hz ensures minimal noise contribution at low frequencies, which is critical for accurate signal amplification. The high slew rate of 943 V/μs allows the amplifier to handle large transient signals without distortion. The rail-to-rail output enables maximum output swing, which is useful when driving ADCs or other loads. The low quiescent current of 3 mA per amplifier makes it suitable for battery-powered preamplifiers. The gain ≥10 stability is ideal for preamplifier stages that require high closed-loop gain.
Recommended
High Speed Data Acquisition
In high speed data acquisition systems, the ADA4895-2 provides the necessary bandwidth and settling time to accurately capture fast signals. With a large signal bandwidth of 146 MHz and a settling time of 22 ns to 0.1%, it can drive high-speed ADCs without introducing significant errors. The low noise and high SFDR ensure that the signal-to-noise ratio is maintained, which is essential for high-resolution conversion. The wide supply range allows the amplifier to be powered from the same rail as the ADC, simplifying power supply design. The dual-channel configuration is useful for simultaneous sampling of multiple channels, reducing component count and board space.
Recommended
Active Filters
The ADA4895-2 is well-suited for active filter designs that require high frequency operation and low noise. Its high bandwidth of 146 MHz allows the implementation of filters with cutoff frequencies in the tens of megahertz, which is useful in communication and signal processing systems. The low input noise ensures that the filter does not degrade the signal-to-noise ratio. The rail-to-rail output allows the filter to drive loads with maximum voltage swing. The gain ≥10 stability is compatible with multiple feedback and Sallen-Key topologies that typically have high Q factors. The low quiescent current makes it efficient for multi-stage filters.
Recommended
Portable Instrumentation
The ADA4895-2 is ideal for portable instrumentation due to its low power consumption and wide supply range. With a quiescent current of only 3 mA per amplifier, it extends battery life in handheld devices. The 3 V to 10 V supply range allows operation from a single lithium-ion cell or two alkaline batteries. The rail-to-rail output maximizes the dynamic range in battery-powered systems where the supply voltage is limited. The small 10-lead MSOP package saves board space, which is critical in compact designs. The low noise and high bandwidth make it suitable for precision measurements in portable test equipment.
Recommended
Communications Receivers
In communications receivers, the ADA4895-2 provides high dynamic range and low distortion, which are essential for processing weak signals in the presence of strong interferers. The SFDR of -72 dBc at 2 MHz ensures that the amplifier does not introduce significant intermodulation products. The high bandwidth of 146 MHz supports IF frequencies in the tens of megahertz. The low noise figure helps maintain the receiver's sensitivity. The dual-channel configuration is useful for I/Q demodulation, where two matched amplifiers are required. The wide supply range allows operation from a 5 V or 3.3 V rail commonly used in communication systems.
Recommended
Recommended Products Summary
Engineering reference data for ADA4895-2ARZ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADA4895-2ARMZ | ADA4895-2ARMZ-RL | ADA4897-2ARMZ |
|---|---|---|---|---|
| Package | 10-Lead MSOP | 10-Lead MSOP | 10-Lead MSOP | 10-Lead MSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Number of Channels | 2 | 2 | 2 | 2 |
| Gain Bandwidth Product | 146 MHz (at G=+10) | 146 MHz (at G=+10) | 146 MHz (at G=+10) | 230 MHz (at G=+1) |
| Slew Rate | 943 V/μs | 943 V/μs | 943 V/μs | 120 V/μs |
| Input Voltage Noise (1/f) | 2 nV/√Hz at 10 Hz | 2 nV/√Hz at 10 Hz | 2 nV/√Hz at 10 Hz | 1 nV/√Hz at 10 Hz |
| Quiescent Current per Amplifier | 3 mA | 3 mA | 3 mA | 3 mA |
| Minimum Stable Gain | 10 | 10 | 10 | 1 |
Key Differentiators
- Low input noise of 2 nV/√Hz at 10 Hz (vs ADA4897-2ARMZ)
- High slew rate of 943 V/μs (vs ADA4897-2ARMZ)
- Gain ≥10 stability (vs ADA4897-2ARMZ)
Design Notes
The ADA4895-2 operates over a supply range of 3 V to 10 V. Use low-ESR ceramic capacitors (0.1 μF and 10 μF) placed close to the V+ and V- pins to ensure stable operation and minimize power supply noise. For dual-supply operation, ensure both supplies are properly decoupled to ground.
For optimal high frequency performance, place the feedback resistors and input resistors close to the amplifier pins to minimize parasitic capacitance and inductance. Use a ground plane under the amplifier and keep signal traces short. The exposed pad (if present) should be soldered to the PCB ground for improved thermal performance.
The ADA4895-2 is stable at gains of 10 or higher. Do not use it in unity-gain configurations as it may oscillate. Also, avoid driving capacitive loads directly without a series resistor, as this can cause instability. For capacitive loads, use a small resistor (e.g., 50 Ω) in series with the output.
Compliance Information
RoHS compliant per Analog Devices product page. No AEC-Q100 qualification indicated.
