Part A
AD8065ARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6652 PCS
- Package
- SOIC-8
- Series
- Linear - Amplificadores - Instrumentação, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The AD8063AR is a viable functional substitute for the AD8065ARZ in many designs, but it is not a pin-for-pin drop-in. Both are single-channel, voltage-feedback op amps in the same 8-lead SOIC package, yet they differ in supply voltage range, quiescent current, and bandwidth. The AD8063AR trades the AD8065ARZ's wider supply headroom and higher speed for lower power consumption, so the substitution should be validated against the target application's supply rail, power budget, and AC performance requirements before release.
Package Type
High match
Supply Voltage Range
Validation required
Quiescent Current
Validation required
Gain Bandwidth Product
Validation required
Parts at a glance
Part B
AD8063AR
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2097 PCS
- Package
- SOIC-8
- Series
- Linear - Amplificadores - Instrumentação, OP Amps, Buffer Amps
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8065ARZ | AD8063AR | Why it matters |
|---|---|---|---|
| Amplifier Type | Voltage Feedback | Voltage Feedback | Both are voltage-feedback op amps, so the feedback topology and external network design are compatible. |
| Number of Circuits | 1 | 1 | Single-channel devices; channel count must match for direct board-level substitution. |
| -3dB Bandwidth | 145 MHz | 320 MHz | Bandwidth determines the maximum signal frequency the amplifier can handle with acceptable gain flatness. |
| Slew Rate | 180 V/µs | 650 V/µs | Slew rate limits large-signal high-frequency performance and affects distortion at high output amplitudes. |
| Input Offset Voltage | 0.4 mV (typ) | 1 mV (typ) | Offset voltage impacts DC accuracy; a lower offset reduces output error in precision signal chains. |
| Input Bias Current | 6 pA (typ) | 3.5 µA (typ) | Very low bias current (FET input) suits high-impedance sources; the higher BJT input bias current affects DC error with large source impedances. |
| Supply Voltage Range | 5 V to 24 V (±2.5 V to ±12 V) | 5 V to 12 V (±2.5 V to ±6 V) | The narrower supply range of the AD8063AR limits use in higher-voltage systems where the AD8065ARZ can operate. |
| Supply Current per Channel | 6.4 mA (typ) | 7.5 mA (typ) | Quiescent current affects power budget and thermal design in the target application. |
| Output Current | 30 mA | 50 mA | Output drive capability determines ability to drive low-impedance loads such as cables or ADC inputs. |
| Package / Mounting | 8-SOIC (Surface Mount) | 8-SOIC (Surface Mount) | Matching package and pinout allow drop-in replacement on the same PCB footprint. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8065ARZ | AD8063AR |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Amplifier Type | Voltage Feedback | Voltage Feedback |
| Number of Circuits | 1 | 1 |
| Output Type | Rail-to-Rail | Rail-to-Rail |
| Slew Rate | 180V/µs | 650V/µs |
| -3 dB Bandwidth | 145 MHz | 320 MHz |
| Current - Input Bias | 3 pA | 3.5 µA |
| Voltage - Input Offset | 400 µV | 1 mV |
| Supply Current | 6.6mA | 6.8mA |
| Current - Output / Channel | 30 mA | 50 mA |
| Voltage - Supply Span(Min) | 5 V | 2.7 V |
| Voltage - Supply Span(Max) | 24 V | 8 V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
| Series | FastFET™ | - |
Frequently asked questions
What are the primary differences between the AD8065ARZ and the AD8063AR?
The AD8065ARZ is a single, high-performance, fast FET-input operational amplifier with a 145 MHz gain bandwidth product and 180 V/µs slew rate, specified for operation from 5 V to 24 V. The AD8063AR is a single, low-cost, high-speed voltage feedback amplifier with a 300 MHz gain bandwidth product and 400 V/µs slew rate, specified for 5 V to 12 V operation. The AD8065ARZ is optimized for low input bias current and low noise, while the AD8063AR is optimized for higher speed at lower supply voltages.
Are the AD8065ARZ and AD8063AR pin-compatible in the SOIC-8 package?
Yes. Both devices are offered in an 8-lead SOIC package with the same standard operational amplifier pinout: pin 1 and pin 5 are null/offset trim, pin 2 is -IN, pin 3 is +IN, pin 4 is -VS, pin 6 is OUT, pin 7 is +VS, and pin 8 is NC. This allows the AD8063AR to be evaluated in a board designed for the AD8065ARZ, provided supply voltage and performance requirements are revalidated.
Can the AD8063AR be used as a direct drop-in replacement for the AD8065ARZ?
Not unconditionally. Although the pinout is the same, the AD8063AR is specified for a maximum supply of 12 V while the AD8065ARZ supports up to 24 V, so a 24 V system cannot use the AD8063AR directly. Input bias current, noise, and offset specifications also differ, so the replacement must be validated against the target design's accuracy and bandwidth requirements using the respective datasheets.
How do the supply voltage ranges of the AD8065ARZ and AD8063AR compare?
The AD8065ARZ is specified for operation from 5 V to 24 V (single supply) or ±2.5 V to ±12 V (dual supply). The AD8063AR is specified for 5 V to 12 V (single supply) or ±2.5 V to ±6 V (dual supply). Designs operating above 12 V total supply must use the AD8065ARZ.
Which device offers higher speed, the AD8065ARZ or the AD8063AR?
The AD8063AR offers higher speed: 300 MHz gain bandwidth product and 400 V/µs slew rate, versus 145 MHz gain bandwidth product and 180 V/µs slew rate for the AD8065ARZ. The AD8063AR achieves this at lower supply voltages, while the AD8065ARZ trades some speed for wider supply range and lower input bias current.
How do the input characteristics of the AD8065ARZ and AD8063AR differ?
The AD8065ARZ is a FET-input amplifier with very low input bias current (typically 1 pA at 25°C) and low input voltage noise (typically 7 nV/√Hz), making it suitable for high-impedance sensor interfaces. The AD8063AR is a voltage feedback amplifier with higher input bias current and different noise performance; designers should consult the AD8063 datasheet for exact values when input impedance or noise is critical.
Are the AD8065ARZ and AD8063AR available in the same package options?
Both devices are available in an 8-lead SOIC package (the "R" suffix in AD8065ARZ and AD8063AR denotes SOIC). The AD8065 is also offered in other packages such as MSOP and SOT-23, but the specific AD8065ARZ and AD8063AR orderable part numbers are both SOIC-8, allowing direct footprint reuse.
Which device is better suited for low-voltage, high-speed signal chains?
The AD8063AR is generally better suited for low-voltage (5 V to 12 V) high-speed signal chains because of its 300 MHz gain bandwidth product and 400 V/µs slew rate. The AD8065ARZ is preferable when wider supply range, lower input bias current, or lower noise is required, even though its bandwidth and slew rate are lower.