Part A
AD8062ARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2406 PCS
- Package
- SOIC-8
- Series
- Linear - Amplificadores - Instrumentação, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The AD8062ARZ and AD8065AR are both high-performance voltage-feedback operational amplifiers from Analog Devices, but they are not pin-for-pin interchangeable. The AD8062ARZ is a dual-channel device in an 8-lead SOIC package, while the AD8065AR is a single-channel device in the same 8-lead SOIC footprint. Designers must account for the differing channel count, pinout assignment, and supply current before substituting one for the other in an existing layout.
Channel Count
Validation required
Pinout Configuration
Validation required
Package Type
High match
Supply Current
Validation required
Parts at a glance
Part B
AD8065AR
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 8453 PCS
- Series
- Linear - Amplifiers - Instrumentation, 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 | AD8062ARZ | AD8065AR | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 2 (Dual) | 1 (Single) | Channel count determines whether the part can replace a single or dual amplifier in a circuit; a dual cannot directly substitute a single without layout changes. |
| Package / Mounting | 8-Lead SOIC (surface mount) | 8-Lead SOIC (surface mount) | Package footprint and pinout must match for a drop-in replacement; both share SOIC-8 but pin assignments differ between single and dual devices. |
| -3 dB Bandwidth | 80 MHz (G = +1) | 145 MHz (G = +1) | Bandwidth sets the maximum signal frequency the amplifier can handle with acceptable gain; the single AD8065 offers wider bandwidth. |
| Slew Rate | 65 V/µs | 180 V/µs | Slew rate limits how fast the output can respond to large signal steps; higher slew rate supports faster, larger-signal applications. |
| Input Voltage Noise | 16 nV/√Hz | 7 nV/√Hz | Lower input voltage noise improves signal-to-noise ratio in low-level signal amplification; the AD8065 is significantly quieter. |
| Quiescent Supply Current (per amplifier) | 6.8 mA (typ, per amp) | 6.4 mA (typ) | Quiescent current affects power budget and thermal design; similar per-amplifier draw but total differs with channel count. |
| Supply Voltage Range | 2.7 V to 12 V (single supply) | 5 V to 24 V (single supply) | Operating supply range must cover the system rail voltage; the AD8062 supports lower rails while the AD8065 supports higher rails. |
| Input Bias Current | 6 µA (typ) | 6 pA (typ) | Bias current causes offset errors in high-impedance circuits; the FET-input AD8065 has vastly lower bias current than the bipolar AD8062. |
| Output Current (short-circuit) | ~50 mA | ~35 mA | Output drive capability determines load-driving ability; the dual AD8062 can source/sink more current per channel. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8062ARZ | AD8065AR |
|---|---|---|
| Series | - | FastFET™ |
| Part Status | Active | Obsolete |
| Amplifier Type | Voltage Feedback | Voltage Feedback |
| Number of Circuits | 2 | 1 |
| Output Type | Rail-to-Rail | Rail-to-Rail |
| Slew Rate | 650V/µs | 180V/µs |
| Current - Input Bias | 3.5 µA | 3 pA |
| Voltage - Input Offset | 1 mV | 400 µV |
| Supply Current | 6.8mA (x2 Channels) | 6.6mA |
| Current - Output / Channel | 50 mA | 30 mA |
| Voltage - Supply Span (Min) | - | 5 V |
| Voltage - Supply Span (Max) | - | 24 V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
| Base Product Number | - | AD8065 |
| -3 dB Bandwidth | 320 MHz | 145 MHz |
| Voltage - Supply Span(Min) | 2.7 V | - |
| Voltage - Supply Span(Max) | 8 V | - |
Frequently asked questions
What are the key differences between the AD8062ARZ and the AD8065AR?
The AD8062ARZ is a dual, low-cost, high-speed voltage feedback amplifier supplied in an 8-lead SOIC package, while the AD8065AR is a single, high-performance, FET-input voltage feedback amplifier supplied in an 8-lead SOIC package. The AD8062 offers two amplifiers per package with lower quiescent current per amplifier, whereas the AD8065 provides one amplifier with lower input bias current and lower voltage noise.
Are the AD8062ARZ and AD8065AR pin-compatible?
No. The AD8062ARZ is a dual amplifier with a standard dual op-amp pinout (two inputs, two outputs, and shared supplies), while the AD8065AR is a single amplifier with a different pin function assignment on the same 8-lead SOIC footprint. They cannot be interchanged without PCB layout changes.
How do the input bias currents of the AD8062ARZ and AD8065AR compare?
The AD8065AR uses a FET input stage and specifies an input bias current of approximately 1 pA typical, making it suitable for high-impedance sensor interfaces. The AD8062ARZ uses a bipolar input stage with a significantly higher input bias current, so it is less suited to very high source-impedance applications.
Which device offers lower voltage noise, the AD8062ARZ or the AD8065AR?
The AD8065AR specifies a lower input voltage noise density (approximately 7 nV/√Hz at 10 kHz typical) than the AD8062ARZ, which is specified at approximately 16 nV/√Hz at 10 kHz typical. For low-noise signal chains, the AD8065AR is the preferred choice.
Can the AD8062ARZ and AD8065AR operate from the same supply voltages?
Both devices are specified for operation on single supplies from 5 V to 24 V and dual supplies of ±2.5 V to ±12 V. The AD8065AR is additionally characterized for operation down to 5 V single supply, and both parts support rail-to-rail output swing, so supply rail requirements are broadly similar.
How does the quiescent current of the AD8062ARZ compare with the AD8065AR?
The AD8062ARZ is specified with a supply current of approximately 6.4 mA typical for the dual amplifier (about 3.2 mA per amplifier), while the AD8065AR is specified at approximately 6.4 mA typical for the single amplifier. Per amplifier, the AD8062ARZ is therefore more power-efficient.
Which part should be selected for a multi-channel design?
For designs requiring two matched amplifier channels in a single package, the AD8062ARZ is the appropriate choice because it integrates two amplifiers and reduces board space and component count. The AD8065AR should be selected when a single, lower-noise, FET-input amplifier is required per channel.