Part A
AD8051ARZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 6365 PCS
- Package
- SOIC-8
- Series
- Amplificateurs linéaires - instruments, amplificateurs opérationnels, amplificateurs tampons
Replacement verdict
Compatible functional replacement candidate
The AD8051ARZ and AD8051AR are functionally equivalent voltage-feedback operational amplifiers from Analog Devices, sharing identical core specifications including gain bandwidth, slew rate, supply range, and pinout. The only material distinction is the AD8051ARZ's RoHS-compliant, lead-free construction versus the leaded AD8051AR, making the ARZ a suitable drop-in substitute where environmental compliance is required.
Amplifier Specifications
High match
Pinout and Footprint
High match
Supply Voltage Range
High match
Environmental Compliance
Validation required
Parts at a glance
Part B
AD8051AR
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 4094 PCS
- Package
- SOIC-8
- Series
- Amplificateurs linéaires - instruments, amplificateurs opérationnels, amplificateurs tampons
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8051ARZ | AD8051AR | 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 Circuits | 1 | 1 | Single-channel configuration must match for pin-for-pin functional replacement. |
| -3dB Bandwidth | 110 MHz | 110 MHz | Bandwidth determines the maximum signal frequency the amplifier can handle with acceptable gain. |
| Slew Rate | 170 V/µs | 170 V/µs | Slew rate limits large-signal high-frequency performance and distortion. |
| Input Offset Voltage | 1.4 mV (typ) | 1.4 mV (typ) | Offset voltage affects DC accuracy; matching values preserve precision behavior. |
| Supply Voltage Range | 3 V to 12 V | 3 V to 12 V | Operating supply range must be compatible with the target system rails. |
| Supply Current per Channel | 4.8 mA (typ) | 4.8 mA (typ) | Quiescent current impacts power budget and thermal design. |
| Package / Mounting | 8-SOIC (RoHS-compliant) | 8-SOIC (non-RoHS) | The "Z" suffix denotes RoHS compliance; both share the same SOIC footprint, but compliance status differs for regulatory requirements. |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | Temperature range must cover the application environment for reliable operation. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8051ARZ | AD8051AR |
|---|---|---|
| Supplier | - | Analog Devices Inc.,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 | 170V/µs | 170V/µs |
| -3 dB Bandwidth | 110 MHz | 110 MHz |
| Current - Input Bias | 1.4 µA | 1.4 µA |
| Voltage - Input Offset | 1.8 mV | 1.8 mV |
| Supply Current | 4.8mA | 4.8mA |
| Current - Output / Channel | 45 mA | 45 mA |
| Voltage - Supply Span(Min) | 3 V | 3 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 the AD8051ARZ and the AD8051AR?
The AD8051ARZ and AD8051AR are both single, high-speed, voltage-feedback operational amplifiers from Analog Devices. The primary difference is the package and lead finish: the AD8051ARZ is supplied in an 8-lead SOIC package with a RoHS-compliant, lead-free (matte tin) finish, while the AD8051AR is the non-RoHS version of the same 8-lead SOIC device with a standard tin-lead finish. Both share the same electrical specifications and die.
Are the AD8051ARZ and AD8051AR electrically identical?
Yes. Both parts use the same silicon die and are specified with the same key parameters, including a -3 dB bandwidth of 110 MHz (G = +1), a slew rate of 145 V/µs, a 0.1% settling time of 50 ns, and a supply voltage range of 3 V to 12 V. The only documented difference is the package finish and RoHS compliance status.
Can the AD8051ARZ be used as a direct drop-in replacement for the AD8051AR?
Yes, from an electrical and footprint standpoint the AD8051ARZ is a drop-in replacement for the AD8051AR, since both are 8-lead SOIC devices with identical pinouts and specifications. The substitution is appropriate when the design requires RoHS compliance; verify the assembly process is compatible with the lead-free matte tin finish.
What is the supply voltage range and quiescent current of these amplifiers?
Both the AD8051ARZ and AD8051AR operate from a single supply of 3 V to 12 V (or dual supplies of ±1.5 V to ±6 V). The typical quiescent supply current is 4.8 mA per amplifier at 5 V.
What are the key AC specifications of the AD8051ARZ and AD8051AR?
Both devices provide a -3 dB bandwidth of 110 MHz at G = +1, a unity-gain slew rate of 145 V/µs, and a 0.1% settling time of 50 ns. These specifications are identical for both orderable part numbers because they share the same die.
What is the operating temperature range for these parts?
Both the AD8051ARZ and AD8051AR are specified over the industrial temperature range of -40°C to +85°C.
Does the AD8051ARZ meet RoHS requirements while the AD8051AR does not?
Yes. The AD8051ARZ is the RoHS-compliant version, featuring a lead-free matte tin lead finish, while the AD8051AR is the non-RoHS version with a tin-lead finish. Designs intended for markets requiring RoHS compliance should use the AD8051ARZ.