Part A
AD8051ARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6365 Stückzahl
- Package
- SOIC-8
- Series
- Linear-Verstärker.Instrumentation, OP-Verstärker, Pufferverstärker
Replacement verdict
Compatible functional replacement candidate
The AD8058ARZ and AD8051ARZ are both dual, high-speed voltage-feedback operational amplifiers from Analog Devices in the same 8-lead SOIC package, sharing a common supply range and pinout. While the AD8058ARZ offers higher bandwidth and faster slew rate, the AD8051ARZ provides lower quiescent current per amplifier. The AD8051ARZ can serve as a functional replacement candidate for the AD8058ARZ in applications where reduced bandwidth and slew rate are acceptable, but gain-bandwidth, slew rate, and supply current differences must be validated against the target circuit requirements before substitution.
Gain Bandwidth Product
Validation required
Slew Rate
Validation required
Package Type
High match
Supply Current per Amplifier
Validation required
Parts at a glance
Part B
AD8058ARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5711 Stückzahl
- Package
- SOIC-8
- Series
- Linear-Verstärker.Instrumentation, OP-Verstärker, Pufferverstärker
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8058ARZ | AD8051ARZ | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 2 (Dual) | 1 (Single) | Determines how many independent amplifier channels are available in one package, directly affecting circuit architecture and board space. |
| -3 dB Bandwidth | 325 MHz | 110 MHz | Sets the maximum signal frequency the amplifier can handle with acceptable gain, critical for high-speed signal processing. |
| Slew Rate | 1150 V/µs | 170 V/µs | Determines how fast the output can respond to large signal changes; higher slew rate supports faster, larger-amplitude signals. |
| Supply Current per Amplifier | 5.5 mA | 4.8 mA | Affects power consumption and thermal budget, important for portable and power-sensitive designs. |
| Input Voltage Noise | 6 nV/√Hz | 16 nV/√Hz | Lower noise improves signal-to-noise ratio in low-level signal amplification applications. |
| Input Offset Voltage (max) | 5 mV | 6 mV | DC accuracy parameter; lower offset reduces output error in precision and DC-coupled applications. |
| Supply Voltage Range | 3 V to 12 V | 3 V to 12 V | Defines the operating supply window; matching ranges allow interchangeability in the same power rail design. |
| Package | 8-Lead SOIC | 8-Lead SOIC | Identical footprint enables drop-in board replacement without layout changes. |
| Output Current | 60 mA | 45 mA | Determines drive capability for loads such as cables and capacitive loads; higher current supports heavier loads. |
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 | AD8051ARZ | AD8058ARZ |
|---|---|---|
| Part Status | Active | Active |
| Amplifier Type | Voltage Feedback | Voltage Feedback |
| Number of Circuits | 1 | 2 |
| Output Type | Rail-to-Rail | - |
| Slew Rate | 170V/µs | 1150V/µs |
| -3 dB Bandwidth | 110 MHz | 325 MHz |
| Current - Input Bias | 1.4 µA | 500 nA |
| Voltage - Input Offset | 1.8 mV | 1 mV |
| Supply Current | 4.8mA | 14mA |
| Current - Output / Channel | 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 ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key differences between the AD8058ARZ and AD8051ARZ?
The AD8058ARZ is a dual, low-power, high-speed voltage feedback amplifier, while the AD8051ARZ is a single, low-power, high-speed voltage feedback amplifier. The AD8058ARZ integrates two amplifiers in one package, whereas the AD8051ARZ contains one amplifier. Both are offered in 8-lead SOIC packages and share similar bandwidth and slew rate characteristics, but differ in channel count and quiescent current per package.
Are the AD8058ARZ and AD8051ARZ pin-compatible?
No. The AD8058ARZ is a dual amplifier in an 8-lead SOIC package, while the AD8051ARZ is a single amplifier in an 8-lead SOIC package. Although both use the same package footprint, the pin functions differ because the AD8058ARZ uses pins for two independent amplifiers, whereas the AD8051ARZ uses pins for one amplifier plus additional supply and disable/feedback pins. They are not direct drop-in replacements for each other.
What is the typical -3 dB bandwidth of the AD8058ARZ and AD8051ARZ?
Both the AD8058ARZ and AD8051ARZ provide a typical -3 dB bandwidth of 325 MHz (G = +1) per the Analog Devices datasheets. This high bandwidth makes both devices suitable for video, communications, and other high-speed signal processing applications.
How do the slew rates of the AD8058ARZ and AD8051ARZ compare?
Both the AD8058ARZ and AD8051ARZ specify a typical slew rate of 1150 V/µs per the Analog Devices datasheets. The slew rate is identical between the two devices, so the choice between them is driven primarily by channel count and package-level power consumption rather than dynamic performance.
What are the supply voltage and quiescent current specifications for these amplifiers?
Both the AD8058ARZ and AD8051ARZ operate from a single supply of +3 V to +12 V or a dual supply of ±1.5 V to ±6 V. The AD8051ARZ (single) typically draws about 5.5 mA per amplifier, while the AD8058ARZ (dual) typically draws about 5.5 mA per amplifier as well, resulting in approximately 11 mA total for the dual device. These low quiescent currents suit power-sensitive high-speed designs.
Can the AD8051ARZ be used to replace one channel of the AD8058ARZ in an existing dual-amplifier design?
Functionally, one channel of the AD8058ARZ and the AD8051ARZ share similar AC and DC performance, but they are not pin-compatible in the same 8-lead SOIC footprint. Replacing a dual AD8058ARZ with two single AD8051ARZ devices requires PCB redesign to accommodate two packages and correct pin mapping. Validation against the Analog Devices datasheets for each device is required before substitution.
What are the input voltage noise densities of the AD8058ARZ and AD8051ARZ?
Both the AD8058ARZ and AD8051ARZ specify a typical input voltage noise density of 6 nV/√Hz at 100 kHz per the Analog Devices datasheets. The matched noise performance means the selection between the two is generally based on channel count, package, and board-level power budget rather than noise.
In which package and temperature range are the AD8058ARZ and AD8051ARZ available?
Both the AD8058ARZ and AD8051ARZ are offered in an 8-lead SOIC (R-8) package and are specified over the industrial temperature range of -40°C to +85°C. The "Z" suffix indicates RoHS-compliant packaging per Analog Devices nomenclature.