Part A
AD8056AR
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7003 PCS
- Package
- SOP-8
- Series
- Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The AD8058AR is a viable functional replacement candidate for the AD8056AR, sharing the same dual voltage-feedback op-amp architecture, SOIC-8 package, and comparable AC performance, though the lower quiescent current and reduced output drive of the AD8058AR require validation against the load and thermal requirements of the target design.
Amplifier Configuration
High match
Package Type
High match
Supply Current
Validation required
Output Drive Capability
Validation required
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8056AR | AD8058AR | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 2 | 2 | Both are dual op-amps, so channel count matches for multi-channel signal chains. |
| -3 dB Bandwidth (G = +1) | 300 MHz | 325 MHz | Higher bandwidth supports faster signal processing and wider video/IF ranges. |
| Slew Rate | 1400 V/µs | 1000 V/µs | Slew rate limits large-signal response speed and distortion at high frequencies. |
| Supply Voltage Range | ±5 V to ±12 V (dual) | ±5 V to ±12 V (dual) | Compatible supply ranges allow drop-in use in the same power rails. |
| Input Voltage Noise | 6 nV/√Hz | 6 nV/√Hz | Noise floor affects sensitivity in low-level signal amplification. |
| Quiescent Supply Current (per amp) | 5.4 mA | 5.4 mA | Power budget and thermal design depend on quiescent current draw. |
| Output Current | 60 mA | 60 mA | Drive capability determines ability to drive cables and low-impedance loads. |
| Package | 8-Lead SOIC | 8-Lead SOIC | Same package footprint enables direct PCB substitution. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8056AR | AD8058AR |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Obsolete | Obsolete |
| Amplifier Type | Voltage Feedback | Voltage Feedback |
| Number of Circuits | 2 | 2 |
| Slew Rate | 1400V/µs | 1150V/µs |
| -3 dB Bandwidth | 300 MHz | 325 MHz |
| Current - Input Bias | 400 nA | 500 nA |
| Voltage - Input Offset | 3 mV | 1 mV |
| Supply Current | 10mA | 14mA |
| Voltage - Supply Span(Min) | 8 V | 3 V |
| Voltage - Supply Span(Max) | 12 V | 12 V |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
| Current - Output / Channel | 60 mA | - |
Frequently asked questions
What are the primary differences between the AD8056AR and AD8058AR?
The AD8056AR is a dual voltage-feedback operational amplifier, while the AD8058AR is a dual current-feedback operational amplifier. Both are offered in an 8-lead SOIC package, but they differ in feedback architecture, bandwidth behavior, and optimal application, with the AD8056 suited to voltage-feedback designs and the AD8058 suited to high-speed current-feedback designs.
Are the AD8056AR and AD8058AR pin-compatible?
Yes. Both devices are dual amplifiers supplied in an 8-lead SOIC (R-8) package with the same standard dual op-amp pinout, so they are pin-compatible at the package level. Electrical and application differences must still be evaluated before substitution.
What is the gain bandwidth product of the AD8056AR?
The AD8056 is a voltage-feedback amplifier with a unity-gain bandwidth of approximately 300 MHz, making it suitable for high-speed voltage-feedback signal conditioning and filtering applications.
What bandwidth does the AD8058AR provide?
The AD8058 is a current-feedback amplifier with a -3 dB bandwidth of approximately 325 MHz at a gain of +1, and it maintains high bandwidth at higher gains, which is characteristic of current-feedback architectures.
Which device is better for high-gain applications?
The AD8058AR is generally preferable for high-gain applications because its current-feedback architecture maintains bandwidth relatively independent of closed-loop gain, whereas the AD8056AR voltage-feedback bandwidth decreases as gain increases.
Do the AD8056AR and AD8058AR have the same supply voltage range?
Both devices operate from dual supplies of ±5 V to ±12 V (or equivalent single supplies of 10 V to 24 V), supporting similar power-supply configurations in typical analog signal-chain designs.
Can the AD8058AR be used as a direct drop-in replacement for the AD8056AR?
Not unconditionally. Although the packages and pinouts match, the AD8058AR uses a current-feedback topology that requires different feedback resistor values and has different stability, noise, and DC accuracy behavior. The circuit must be re-evaluated against the AD8058 datasheet before substitution.
Which device is more suitable for video and high-speed signal processing?
Both are high-speed amplifiers suitable for video and high-speed signal processing. The AD8056AR offers voltage-feedback predictability for filter and gain-stage designs, while the AD8058AR offers current-feedback bandwidth retention for high-gain video and pulse applications; selection depends on the specific signal-chain requirements.