Part A
AD817AR
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 2887 PCS
- Package
- SOIC-8
- Series
- Amplificateurs linéaires - instruments, amplificateurs opérationnels, amplificateurs tampons
Replacement verdict
Not a drop-in replacement
The AD817AR and AD8170AR-REEL7 are not functionally interchangeable despite sharing the same SOIC-8 footprint and similar supply voltage ranges. The AD817AR is a single high-speed voltage-feedback operational amplifier, while the AD8170AR-REEL7 is a two-channel multiplexer-amplifier with an integrated analog switch and channel-select control. Their internal architectures, pin functions, and signal-path behavior differ fundamentally, so the AD8170AR-REEL7 cannot be substituted for the AD817AR in existing designs without circuit redesign and validation.
Different device function
Different channel count
Different pin function
Different signal path
Parts at a glance
Part B
AD8170AR-REEL7
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 4166 PCS
- Package
- SOIC-8
- Series
- Interface - dédiée
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD817AR | AD8170AR-REEL7 | Why it matters |
|---|---|---|---|
| Amplifier Type | General Purpose Voltage Feedback Op Amp | Multiplexer Amplifier (2:1 Mux) | Defines the core function; a mux amplifier routes one of two inputs, while a standard op amp does not, so they are not functionally interchangeable. |
| Number of Channels | 1 | 2 (selectable inputs, 1 output) | Channel count determines how many signal paths can be handled; the mux device switches between two inputs, unlike the single-channel op amp. |
| -3 dB Bandwidth | 50 MHz | 250 MHz | Bandwidth sets the maximum signal frequency the device can amplify; the mux amplifier offers much higher bandwidth for high-speed signal routing. |
| Slew Rate | 350 V/µs | 1000 V/µs | Slew rate limits how fast the output can change; higher slew rate supports faster large-signal transitions in high-speed applications. |
| Supply Voltage Range | ±5 V to ±15 V (dual) | ±5 V (dual) | Supply range determines compatibility with the system power rails; the mux amplifier is restricted to ±5 V while the op amp supports a wider range. |
| Input Offset Voltage (max) | 2 mV | 5 mV | Offset voltage affects DC accuracy; a lower offset reduces output error in precision signal chains. |
| Package / Mounting | 8-Lead SOIC (surface mount) | 8-Lead SOIC (surface mount, tape and reel) | Package and packaging format affect PCB footprint and assembly; both share the SOIC footprint but differ in delivery format for production. |
| Output Current | 50 mA | 30 mA | Output drive capability determines the load the device can drive; the op amp can source more current than the mux amplifier. |
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 | AD817AR | AD8170AR-REEL7 |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Obsolete | Obsolete |
| Applications | - | Multiplexer with Amplifier |
| Voltage - Supply | - | ±4V ~ 6V |
| Amplifier Type | General Purpose | - |
| Number of Circuits | 1 | - |
| Slew Rate | 350V/µs | - |
| Gain Bandwidth Product | 50 MHz | - |
| -3 dB Bandwidth | 50 MHz | - |
| Current - Input Bias | 3.3 µA | - |
| Voltage - Input Offset | 500 µV | - |
| Supply Current | 7mA | - |
| Current - Output / Channel | 50 mA | - |
| Voltage - Supply Span(Min) | 5 V | - |
| Voltage - Supply Span(Max) | 36 V | - |
| Operating Temperature | -40°C ~ 85°C | - |
| Mounting Type | Surface Mount | - |
Frequently asked questions
Are the AD817AR and AD8170AR-REEL7 the same type of device?
No. The AD817AR is a high-speed, low-power operational amplifier from Analog Devices, while the AD8170AR-REEL7 is a high-speed, 8-lead SOIC video multiplexer/amplifier (a 2:1 multiplexer with an integrated output amplifier) from Analog Devices. They serve different signal-chain functions and are not functionally interchangeable.
What are the key differences in function between the AD817AR and AD8170AR-REEL7?
The AD817AR is a general-purpose voltage-feedback op amp intended for amplification, buffering, and active filtering. The AD8170AR-REEL7 is a 2:1 analog multiplexer with an internal output amplifier, designed to switch between two video or high-speed signal sources and drive a common output, typically in video and display routing applications.
Do the AD817AR and AD8170AR-REEL7 use the same package and pinout?
Both devices are offered in 8-lead SOIC (R-8) packages, but their pin functions differ because the AD8170AR-REEL7 includes multiplexer control and two signal inputs. The AD817AR pinout follows a standard single op amp configuration (offset null, inputs, supply, output), so the two are not pin-compatible for direct substitution.
Can the AD817AR be used as a drop-in replacement for the AD8170AR-REEL7?
No. The AD8170AR-REEL7 integrates a 2:1 multiplexer with a logic-controlled select pin and two inputs, which the AD817AR does not provide. Replacing one with the other would require circuit redesign, including adding external multiplexing and control logic, and is not a drop-in substitution.
What supply voltage ranges do these devices support?
Both the AD817AR and AD8170AR-REEL7 are specified for operation on dual supplies of ±5 V to ±15 V (or equivalent single-supply configurations within the datasheet limits). Designers should confirm the exact recommended operating conditions in the respective Analog Devices datasheets before finalizing a design.
Are these devices suitable for video signal routing applications?
The AD8170AR-REEL7 is specifically intended for video multiplexing and distribution, with a 2:1 mux and output amplifier optimized for driving video loads. The AD817AR is a general-purpose high-speed op amp that can be used in video buffering or amplification stages, but it does not provide the integrated multiplexing function of the AD8170AR-REEL7.
What does the REEL7 suffix indicate on the AD8170AR-REEL7?
The REEL7 suffix denotes tape-and-reel packaging for automated assembly, typically with a 7-inch reel. It does not change the electrical specifications of the AD8170AR device; it only defines the shipping and packaging format.
Which device should be selected for a design requiring signal switching between two sources?
The AD8170AR-REEL7 should be selected when the design requires a 2:1 multiplexer with an integrated output amplifier and logic-controlled channel selection. The AD817AR is appropriate when only amplification or buffering of a single signal path is needed and no integrated switching is required.