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 AD8051ARZ and AD8054AR are both high-speed voltage-feedback operational amplifiers from Analog Devices sharing the same core amplifier architecture, supply voltage range, and SOIC package family, making the AD8051ARZ a viable functional substitute for the AD8054AR in single-channel applications where the quad channel count is not required. Designers must account for the reduced channel count, differing package footprint, and per-channel quiescent current when validating the replacement in existing layouts.
Channel Count
Validation required
Package Type
Validation required
Supply Voltage Range
High match
Amplifier Architecture
High match
Parts at a glance
Part B
AD8054AR
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 8951 Stückzahl
- Package
- SOIC-14
- 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 | AD8051ARZ | AD8054AR | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 1 | 4 | Channel count determines how many independent signal paths can be processed; a single vs quad device is not a drop-in substitute in multi-channel designs. |
| Gain Bandwidth Product | 110 MHz | 160 MHz | GBW sets the maximum usable frequency for a given closed-loop gain; a lower GBW part may not meet bandwidth requirements of the original circuit. |
| -3 dB Bandwidth (G = +1) | 110 MHz | 160 MHz | Unity-gain bandwidth directly affects signal fidelity at high frequencies and pulse response in buffer and filter stages. |
| Slew Rate | 140 V/µs | 160 V/µs | Slew rate limits large-signal transient response; insufficient slew rate causes distortion on fast edges and limits full-power bandwidth. |
| Supply Current per Amplifier | 4.8 mA | 2.8 mA | Quiescent current impacts power budget and thermal design, especially in battery-powered or densely packed multi-channel systems. |
| Input Voltage Noise Density | 16 nV/√Hz | 10 nV/√Hz | Lower input noise improves SNR in low-level signal amplification; a noisier substitute can degrade dynamic range. |
| Input Offset Voltage (max) | 6 mV | 10 mV | Offset voltage contributes DC error; a larger offset may require recalibration or exceed accuracy limits in precision DC-coupled stages. |
| Package / Pin Count | 8-Lead SOIC | 14-Lead SOIC | Package and pinout must match the PCB footprint; differing pin counts prevent direct board-level substitution without redesign. |
| Supply Voltage Range | 3 V to 12 V | 3 V to 12 V | Operating supply range must cover the system rail; both support 3 V to 12 V, so rail compatibility is maintained. |
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 | AD8054AR |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC,Analog Devices Inc. |
| Part Status | Active | Obsolete |
| Amplifier Type | Voltage Feedback | Voltage Feedback |
| Number of Circuits | 1 | 4 |
| Output Type | Rail-to-Rail | Rail-to-Rail |
| Slew Rate | 170V/µs | 190V/µs |
| -3 dB Bandwidth | 110 MHz | 160 MHz |
| Current - Input Bias | 1.4 µA | 2 µA |
| Voltage - Input Offset | 1.8 mV | 1.8 mV |
| Supply Current | 4.8mA | 2.875mA (x4 Channels) |
| Current - Output / Channel | 45 mA | 30 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 are the fundamental differences between the AD8051ARZ and the AD8054AR?
The AD8051ARZ is a single, high-speed, voltage-feedback operational amplifier offered in an 8-lead SOIC package. The AD8054AR is a quad, high-speed, voltage-feedback operational amplifier offered in a 14-lead SOIC package. The primary differences are the number of amplifiers per package (1 vs. 4) and the package pin count and footprint.
Are the AD8051ARZ and AD8054AR electrically identical on a per-amplifier basis?
Yes. Both products are members of the same AD805x family and share the same core voltage-feedback amplifier design. Per-amplifier AC and DC specifications, such as -3 dB bandwidth, slew rate, and input offset voltage, are comparable across the family, though individual datasheet limits should be verified for each grade.
Can the AD8051ARZ be used as a direct drop-in replacement for one channel of the AD8054AR?
No. The AD8051ARZ is a single amplifier in an 8-lead SOIC package, while the AD8054AR is a quad amplifier in a 14-lead SOIC package. The package footprints, pin counts, and pin functions differ, so a direct PCB drop-in replacement is not possible without layout changes.
What are the typical supply voltage and quiescent current characteristics of these devices?
Both the AD8051ARZ and AD8054AR operate from a single supply of +3 V to +12 V or a dual supply of ±1.5 V to ±6 V. The AD8051ARZ typically draws approximately 4.8 mA of quiescent supply current per amplifier, while the AD8054AR, containing four amplifiers, draws a proportionally higher total quiescent current as specified in its datasheet.
Which package types are available for the AD8051ARZ and AD8054AR?
The AD8051ARZ is supplied in an 8-lead SOIC package (the "RZ" suffix denotes RoHS-compliant SOIC). The AD8054AR is supplied in a 14-lead SOIC package. Both are surface-mount SOIC packages, but they differ in pin count and body width.
How do the bandwidth and slew rate of the AD8051ARZ and AD8054AR compare?
Both devices are high-speed voltage-feedback amplifiers with a -3 dB bandwidth of approximately 160 MHz and a slew rate of approximately 140 V/µs, as specified in the AD805x family datasheet. Because they share the same amplifier core, their dynamic performance is essentially equivalent on a per-channel basis.
Which device should be selected for a multi-channel signal chain design?
The AD8054AR is generally preferred for multi-channel designs because it integrates four amplifiers in a single 14-lead SOIC package, reducing board space and component count. The AD8051ARZ is better suited to single-channel applications where only one amplifier is required, avoiding the cost and board area of unused channels.