Part A
AD8180ARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 7397 PCS
- Series
- Interface - Trocadores analógicos - Objetivo Especial
Replacement verdict
Not a drop-in replacement
The AD818ARZ and AD8180ARZ are not drop-in replacements for one another. Although both are analog signal processing ICs, they differ fundamentally in function, channel configuration, and package, so substituting one for the other requires circuit redesign and cannot be treated as a direct swap.
Different function
Different channel count
Different package
Different pinout
Parts at a glance
Part B
AD818ARZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4714 PCS
- Package
- SOIC-8
- Series
- Linear - Amplifiers - Video Amps and Modules
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD818ARZ | AD8180ARZ | Why it matters |
|---|---|---|---|
| Function / Device Type | Video operational amplifier (single) | Video multiplexer (2:1, high-speed) | These are fundamentally different device classes; one is an amplifier and the other is a switch/multiplexer, so they are not functionally interchangeable. |
| Number of Channels | 1 | 2 inputs to 1 output (2:1 mux) | Channel count determines how many signal paths the device can process or route in a system. |
| -3 dB Bandwidth | 130 MHz (G = +2) | 750 MHz | Bandwidth sets the maximum signal frequency the part can handle with acceptable attenuation, critical for video and high-speed signal chains. |
| Slew Rate | 500 V/µs | 1000 V/µs | Slew rate limits how fast the output can change, affecting large-signal fidelity and transient response. |
| Supply Voltage Range | ±5 V to ±15 V (dual supply) | ±5 V (dual supply) | Supply range must match the system rails; a narrower range restricts where the part can be used. |
| Package | 8-lead SOIC | 8-lead SOIC | Package compatibility affects PCB footprint and assembly, though identical packages here do not imply functional equivalence. |
| Output Current / Drive | 50 mA output current | Drives 150 Ω loads (video load) | Drive capability determines whether the device can directly drive cables or low-impedance loads without buffering. |
| Key Application Role | Signal amplification / buffering | Signal routing / switching between sources | The role in the signal chain dictates whether amplification or selection is needed, which cannot be substituted by the other part. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8180ARZ | AD818ARZ |
|---|---|---|
| Part Status | Active | Active |
| Base Product Number | AD8180 | - |
| Applications | Video | Voltage Feedback |
| Multiplexer / Demultiplexer Circuit | 2:1 | - |
| Number of Channels | 1 | - |
| Voltage - Supply, Dual (V±) | ±4V ~ 6V | - |
| -3 dB Bandwidth | 930MHz | 130 MHz |
| Features | Buffered | - |
| Operating Temperature | -40°C ~ 85°C (TA) | - |
| Mounting Type | Surface Mount | Surface Mount |
| Packaging | Tube | - |
| Number of Circuits | - | 1 |
| Slew Rate | - | 500V/µs |
| Supply Current | - | 7 mA |
| Current - Output / Channel | - | 50 mA |
| Voltage - Supply, Single/Dual (±) | - | 5V ~ 36V, ±2.5V ~ 18V |
Frequently asked questions
Are the AD818ARZ and AD8180ARZ interchangeable in an existing design?
No. The AD818ARZ is a single high-speed voltage-feedback operational amplifier in an 8-lead SOIC package, while the AD8180ARZ is a high-speed analog multiplexer (2:1 mux) in an 8-lead SOIC package. They are functionally different devices and cannot be substituted for one another.
What are the core functions of the AD818ARZ and AD8180ARZ?
The AD818ARZ is a single, low-cost, high-speed voltage-feedback op amp intended for video and signal-processing applications. The AD8180ARZ is a 2:1 analog multiplexer designed for switching between two high-speed analog signals, such as in video routing and signal selection.
Do the AD818ARZ and AD8180ARZ share the same package and pinout?
Both devices are offered in an 8-lead SOIC (R-8) package, but their pin functions differ because one is an op amp and the other is a multiplexer. Pin assignments are not equivalent, so PCB layouts are not directly compatible.
How do the bandwidth specifications compare between the AD818ARZ and AD8180ARZ?
The AD818ARZ provides a small-signal bandwidth of approximately 130 MHz at unity gain (G = +1). The AD8180ARZ provides a -3 dB bandwidth of approximately 750 MHz for its multiplexer signal path. These figures reflect different device functions and should be compared only within their respective application contexts.
What supply voltages do the AD818ARZ and AD8180ARZ require?
Both devices operate from dual supplies of ±5 V (nominal) and support a supply range of ±4.5 V to ±5.5 V. They are not specified for single-supply operation in their standard datasheet configurations.
Can the AD8180ARZ be used to multiplex signals into an AD818ARZ amplifier stage?
Yes. A common architecture uses the AD8180ARZ 2:1 multiplexer to select between two analog sources and the AD818ARZ op amp to buffer or gain the selected signal. Both devices are specified for ±5 V operation and high-speed signal paths, making them compatible in a shared signal chain.
What are the key differences in channel count and signal routing between the two parts?
The AD818ARZ is a single-channel amplifier with one input and one output. The AD8180ARZ is a two-input, one-output multiplexer with a digital select control pin that determines which input is routed to the output. This fundamental difference defines their roles in a signal chain.
Are the AD818ARZ and AD8180ARZ specified for the same operating temperature range?
Both devices are specified for the industrial temperature range of -40°C to +85°C, as documented in their respective manufacturer datasheets.