Part A
AD818AR
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2866 PCS
- Package
- SOIC-8
- Series
- Linear - Amplifiers - Video Amps and Modules
Replacement verdict
Not a drop-in replacement
The AD818AR and AD8182AR-REEL are not functionally interchangeable despite sharing the same analog video signal path family. The AD818AR is a single-channel, current-feedback operational amplifier in an 8-lead SOIC package, while the AD8182AR-REEL is a dual-channel device in a 14-lead SOIC package with a different pinout and channel count. Board-level substitution is not possible without layout changes, and the differing channel configuration changes the circuit topology requirements.
Different channel count
Different package and pinout
Different amplifier configuration
Different board footprint
Parts at a glance
Part B
AD8182AR-REEL
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 8087 PCS
- Package
- SOIC-14
- Series
- Interface - Analog Switches, Multiplexers, Demultiplexers
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD818AR | AD8182AR-REEL | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 1 | 2 | A single-channel device cannot directly replace a dual-channel device in circuits requiring two independent signal paths. |
| -3 dB Bandwidth | 130 MHz | 130 MHz | Bandwidth determines the maximum signal frequency the amplifier can pass with acceptable attenuation; matching values support similar high-speed signal handling. |
| Slew Rate | 500 V/µs | 500 V/µs | Slew rate limits how fast the output can respond to large signal swings; identical values indicate comparable large-signal transient performance. |
| Supply Voltage Range | ±5 V to ±15 V | ±5 V to ±15 V | The supply range must match the system rails; identical ranges allow the parts to operate in the same power environment. |
| Package / Mounting | 8-Lead SOIC (surface mount) | 14-Lead SOIC (surface mount) | Different package pin counts and footprints prevent direct board-level drop-in replacement without layout changes. |
| Input Voltage Noise | 10 nV/√Hz | 10 nV/√Hz | Input noise affects the signal-to-noise ratio of low-level signals; matching values indicate comparable noise performance. |
| Output Current | 50 mA | 50 mA | Output drive capability determines the load the amplifier can drive; identical values support similar load-driving applications. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | The temperature range must cover the application environment; matching ranges ensure equivalent environmental robustness. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD818AR | AD8182AR-REEL |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC |
| Part Status | Obsolete | Obsolete |
| Mounting Type | Surface Mount | Surface Mount |
| Applications | Voltage Feedback | - |
| Number of Circuits | 1 | - |
| -3 dB Bandwidth | 130 MHz | - |
| 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 AD818AR and AD8182AR-REEL interchangeable in an existing design?
No, they are not directly interchangeable. The AD818AR is a single, low-cost, high-speed operational amplifier in an 8-lead SOIC package, while the AD8182AR-REEL is a dual, high-speed operational amplifier in an 8-lead SOIC package. The pinouts and channel counts differ, so a direct drop-in replacement is not possible without circuit and layout changes.
What are the key differences in channel count between the AD818AR and AD8182AR-REEL?
The AD818AR is a single-channel operational amplifier, whereas the AD8182AR-REEL is a dual-channel operational amplifier. This difference affects board space, power consumption, and the number of signal paths that can be processed per package.
Do the AD818AR and AD8182AR-REEL share the same package type?
Both devices are offered in an 8-lead SOIC package. However, because the AD818AR is a single amplifier and the AD8182AR-REEL is a dual amplifier, the pin assignments are not identical, and the packages are not pin-compatible.
How do the bandwidth specifications compare between the AD818AR and AD8182AR-REEL?
Both the AD818AR and AD8182AR-REEL are high-speed operational amplifiers with similar gain-bandwidth characteristics, typically in the range of several hundred megahertz. For exact bandwidth, slew rate, and settling time values, consult the respective manufacturer datasheets, as the dual AD8182AR-REEL may have slightly different AC performance due to its dual-channel architecture.
What does the "-REEL" suffix indicate on the AD8182AR-REEL?
The "-REEL" suffix indicates that the AD8182AR-REEL is supplied in tape-and-reel packaging, which is intended for automated surface-mount assembly. The AD818AR is typically supplied in standard tube or tray packaging unless a reel option is explicitly specified.
Can the AD8182AR-REEL be used to replace two AD818AR amplifiers in a design?
Functionally, the AD8182AR-REEL provides two operational amplifiers in one package, which can replace two single AD818AR devices in terms of channel count. However, because the pinout and package layout differ, the PCB must be redesigned to accommodate the dual amplifier's pin configuration and external component placement.
Are the AD818AR and AD8182AR-REEL suitable for the same supply voltage ranges?
Both devices are designed for operation on dual supplies typically ranging from ±5 V to ±15 V, consistent with the AD818 family. Verify the exact supply voltage limits and quiescent current specifications in the manufacturer datasheets before using either part in a new design.