AD8615ARZ - Precision 20MHz CMOS RRIO Op Amp | Analog Devices
MPN: AD8615ARZ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.35 | $2.35 |
| 10 | $2.11 | $21.10 |
| 100 | $1.88 | $188.00 |
| 500 | $1.69 | $845.00 |
| 1,000 | $1.52 | $1,520.00 |
Drop-in alternatives for AD8615ARZ — 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:
AD8616ARZ
✅ Drop-In✓ In Stock
$1.82 / Unit
View Datasheet →AD8515ARZ
✅ Drop-In✓ In Stock
$0.28 / Unit
View Datasheet →AD8605ARZ
✅ Drop-In📋 Reference alternative (not in catalog)
OPA340UA
✅ Drop-In📋 Reference alternative (not in catalog)
MCP6281-E/SN
✅ Drop-In📋 Reference alternative (not in catalog)
AD8615ARZ Maximum Ratings & Electrical Characteristics
| Amplifier Type | Operational Amplifier |
| Number of Channels | 1 |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Offset Voltage (max) | 65 µV |
| Input Bias Current | 1 pA |
| Voltage Noise Density | 8 nV/√Hz |
| Bandwidth | 20 MHz |
| Slew Rate | 12 V/µs |
| Output Current | 150 mA |
| Supply Current | 2 mA |
| Rail-to-Rail Input/Output | Yes |
| Unity-Gain Stable | Yes |
| No Phase Reversal | Yes |
| Operating Temperature Range | -40°C to +125°C |
| Package | 8-Lead SOIC (ARZ) |
| RoHS Compliant | Yes |
AD8615ARZ Pin Configuration
| Pin 1 | OUT — Amplifier output |
| Pin 2 | -IN — Inverting input |
| Pin 3 | +IN — Non-inverting input |
| Pin 4 | V- — Negative supply (ground in single-supply) |
| Pin 5 | NC — No connect |
| Pin 6 | NC — No connect |
| Pin 7 | NC — No connect |
| 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
AD8615ARZ is suitable for 6 applications: Photodiode Amplifier, Portable Instrumentation, Active Filters, Sensor Signal Conditioning, Audio Signal Processing, Battery-Powered Devices.
Photodiode Amplifier
The AD8615ARZ is ideal for photodiode amplifier circuits due to its low input bias current of 1 pA and low voltage noise of 8 nV/√Hz. In a transimpedance configuration, the amplifier converts the photodiode current to a voltage with minimal error. The wide 20 MHz bandwidth supports high-speed optical communication and light detection systems. The rail-to-rail output allows maximum dynamic range, and the low supply current makes it suitable for battery-powered optical sensors.
Recommended
Portable Instrumentation
The AD8615ARZ is well-suited for portable instrumentation due to its low supply current of 2 mA and operation from 2.7 V to 5.5 V. The rail-to-rail input and output maximize signal range in battery-powered devices. The low offset voltage of 65 µV ensures accurate measurements in data acquisition systems. The high output current of 150 mA allows direct drive of displays or actuators. The small SOIC package is ideal for space-constrained designs.
Recommended
Active Filters
The AD8615ARZ is excellent for active filter designs due to its 20 MHz bandwidth and 12 V/µs slew rate. These specifications allow implementation of high-frequency low-pass, high-pass, and band-pass filters with minimal phase error. The low noise and low distortion ensure clean signal processing. The rail-to-rail output enables filters to operate at full supply swing, which is beneficial in single-supply systems. The unity-gain stability simplifies filter design.
Recommended
Sensor Signal Conditioning
The AD8615ARZ is ideal for conditioning signals from high-impedance sensors such as pH probes, thermocouples, and piezoelectric sensors. The low input bias current of 1 pA minimizes loading errors, while the low offset voltage ensures accurate DC accuracy. The wide bandwidth supports dynamic sensor signals. The rail-to-rail input allows the amplifier to handle signals near the supply rails, which is common in single-supply sensor systems. The low power consumption is beneficial for remote or battery-powered sensors.
Recommended
Audio Signal Processing
The AD8615ARZ can be used in audio applications such as headphone amplifiers and active crossovers due to its low noise and high output current. The 8 nV/√Hz noise density ensures a low noise floor, while the 150 mA output current can drive headphones directly. The 20 MHz bandwidth is more than sufficient for audio frequencies, and the low distortion preserves signal fidelity. The rail-to-rail output maximizes headroom in battery-powered audio devices.
Recommended
Battery-Powered Devices
The AD8615ARZ is well-suited for battery-powered devices due to its low supply current of 2 mA and wide supply voltage range of 2.7 V to 5.5 V. The rail-to-rail input and output allow full signal swing even as the battery voltage drops. The low offset voltage and low noise ensure accurate signal processing in portable instruments. The small SOIC package and RoHS compliance make it easy to integrate into compact designs.
Recommended
Recommended Products Summary
Engineering reference data for AD8615ARZ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD8616ARZ | AD8515ARZ | OPA340UA |
|---|---|---|---|---|
| Package | 8-Lead SOIC | 8-Lead SOIC | 8-Lead SOIC | 8-Lead SOIC |
| Brand | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Number of Channels | 1 | 2 | 1 | 1 |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.5 V to 5.5 V |
| Offset Voltage (max) | 65 µV | 65 µV | 100 µV | 500 µV |
| Input Bias Current | 1 pA | 1 pA | 1 pA | 0.5 pA |
| Bandwidth | 20 MHz | 20 MHz | 11 MHz | 5.5 MHz |
| Slew Rate | 12 V/µs | 12 V/µs | 6 V/µs | 6 V/µs |
| Output Current | 150 mA | 150 mA | 70 mA | 50 mA |
| Supply Current | 2 mA | 4 mA (total) | 1.1 mA | 750 µA |
Key Differentiators
- Higher bandwidth and slew rate (vs OPA340UA)
- Lower offset voltage (vs AD8515ARZ)
- Higher output current (vs MCP6281-E/SN)
Design Notes
The AD8615ARZ operates from a single supply of 2.7 V to 5.5 V. Use a 0.1 µF ceramic capacitor close to the V+ pin and a 10 µF tantalum capacitor for bulk decoupling. For dual-supply operation, connect V- to the negative rail and add similar decoupling. Ensure the supply voltage does not exceed the absolute maximum rating of 6 V to prevent damage.
For optimal noise performance, keep the input traces short and use a ground plane. Place the feedback resistor and capacitor close to the inverting input to minimize parasitic capacitance. Use low-value resistors (e.g., 1 kΩ to 10 kΩ) in the feedback network to reduce noise and offset errors. Avoid routing high-speed digital traces near the input pins.
The AD8615ARZ has a rail-to-rail input stage, but the input common-mode range should not exceed the supply rails by more than 0.3 V. Exceeding this can cause phase reversal, although the device is designed to avoid it. Also, the output can source or sink 150 mA, but ensure the total power dissipation does not exceed the package's thermal limits. For high-output-current applications, consider the thermal resistance of the SOIC package.
Compliance Information
RoHS compliant per Analog Devices product page. No AEC-Q100 qualification indicated for this part.
