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 AD8056ARZ and AD8056AR are functionally equivalent dual high-speed operational amplifiers from Analog Devices, sharing the same core die, SOIC-8 package, and dual-channel configuration. The AD8056ARZ is the RoHS-compliant, lead-free (Pb-free) revision of the AD8056AR, making it a direct drop-in replacement in most designs. The primary distinction is package finish and environmental compliance, which should be validated against the assembly process and regulatory requirements of the target application.
Amplifier Core Specifications
High match
Package Type and Pinout
High match
RoHS and Lead-Free Compliance
Validation required
Operating Temperature Range
High match
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8056ARZ | AD8056AR | Why it matters |
|---|---|---|---|
| Amplifier Type | Voltage Feedback | Voltage Feedback | Both are voltage-feedback op amps, so the feedback topology and compensation behavior are the same. |
| Number of Channels | 2 | 2 | Both are dual amplifiers, so channel count and pinout usage are interchangeable. |
| -3 dB Bandwidth | 300 MHz | 300 MHz | Identical bandwidth means AC signal handling and high-frequency performance are equivalent. |
| Slew Rate | 1400 V/µs | 1400 V/µs | Matching slew rate ensures the same large-signal transient response and distortion behavior. |
| Input Offset Voltage (max) | 5 mV | 5 mV | Same offset spec means DC accuracy and error budget are unchanged when substituting. |
| Supply Voltage Range | ±5 V to ±12 V (dual) | ±5 V to ±12 V (dual) | Identical supply range allows the same power rails and decoupling design. |
| Supply Current per Amplifier | 5.4 mA | 5.4 mA | Same quiescent current keeps thermal and power budget unchanged. |
| Package / Mounting | 8-SOIC (RoHS-compliant, Pb-free) | 8-SOIC (leaded) | Same footprint and pinout, but the Z suffix denotes RoHS/Pb-free construction versus the leaded version, which matters for compliance and solder process. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Identical temperature range means the same environmental qualification applies. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8056AR | AD8056ARZ |
|---|---|---|
| Part Status | Obsolete | Active |
| Amplifier Type | Voltage Feedback | Voltage Feedback |
| Number of Circuits | 2 | 2 |
| Slew Rate | 1400V/µs | 1400V/µs |
| -3 dB Bandwidth | 300 MHz | 300 MHz |
| Current - Input Bias | 400 nA | 400 nA |
| Voltage - Input Offset | 3 mV | 3 mV |
| Supply Current | 10mA | 10mA |
| Current - Output / Channel | 60 mA | 60 mA |
| Voltage - Supply Span(Min) | 8 V | 8 V |
| Voltage - Supply Span(Max) | 12 V | 12 V |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What is the difference between AD8056ARZ and AD8056AR?
The AD8056ARZ and AD8056AR are both dual, low-cost, high-speed voltage feedback operational amplifiers from Analog Devices. The primary difference is the package and ordering suffix: the AD8056ARZ is supplied in a lead-free (Pb-free), RoHS-compliant 8-lead SOIC package, while the AD8056AR is the older leaded (non-RoHS) 8-lead SOIC version. The "Z" suffix in Analog Devices nomenclature denotes RoHS-compliant, lead-free construction.
Are the AD8056ARZ and AD8056AR electrically identical?
Yes. Both parts share the same die and specified electrical performance: 300 MHz -3 dB bandwidth, 1400 V/µs slew rate, 50 mA output current, and operation on ±5 V or single +5 V to +12 V supplies. The datasheet parameters apply equally to both orderable variants; only the package finish and compliance status differ.
Can the AD8056ARZ be used as a drop-in replacement for the AD8056AR?
Yes, in most cases. Both are 8-lead SOIC devices with identical pinouts and the same functional specifications, so the AD8056ARZ can directly replace the AD8056AR on an existing PCB. The substitution is recommended where RoHS compliance is required, since the AD8056AR is the non-lead-free version.
What are the key specifications of the AD8056?
The AD8056 is a dual voltage feedback op amp with 300 MHz -3 dB bandwidth, 1400 V/µs slew rate, 0.1 dB flatness to 40 MHz, low differential gain/phase error, and 50 mA output drive. It operates from ±5 V dual supplies or +5 V to +12 V single supply and is specified over the -40 °C to +85 °C industrial temperature range.
Is the AD8056ARZ RoHS compliant while the AD8056AR is not?
Yes. The "Z" suffix on AD8056ARZ indicates RoHS-compliant, lead-free (Pb-free) packaging per Analog Devices ordering conventions. The AD8056AR is the legacy leaded (non-RoHS) SOIC variant. Designs requiring RoHS compliance should specify the AD8056ARZ.
What package do the AD8056ARZ and AD8056AR use?
Both devices are offered in an 8-lead SOIC (Small Outline Integrated Circuit) package with the same pin configuration. The AD8056ARZ is the Pb-free/RoHS version of that same 8-lead SOIC package, and the AD8056AR is the leaded version.
What are typical applications for the AD8056?
Typical applications include video line drivers, active filters, high-speed signal conditioning, ADC input buffers, and general-purpose high-speed amplification where wide bandwidth, high slew rate, and moderate output drive are required. Both the AD8056ARZ and AD8056AR are suitable for these applications.