Part A
AD817AR
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2887 PCS
- Package
- SOIC-8
- Series
- Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps
Replacement verdict
Not a drop-in replacement
AD817AR and AD8170AR-REEL are not functionally interchangeable: the AD817AR is a single high-speed voltage-feedback operational amplifier in an 8-lead SOIC package, while the AD8170AR-REEL is a 2:1 multiplexer-amplifier in a 14-lead SOIC package with a different pinout, channel architecture, and control interface. Substitution requires a full circuit redesign and cannot be treated as a drop-in replacement.
Different function type
Different channel count
Different package and pinout
Different control interface
Parts at a glance
Part B
AD8170AR-REEL
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 9485 PCS
- Package
- SOIC-8
- Series
- Interface - Specialized
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-REEL | Why it matters |
|---|---|---|---|
| Amplifier Type | General-purpose voltage feedback op-amp | Multiplexer amplifier (2:1 mux-amp) | Defines the core function; a mux-amp cannot directly replace a plain op-amp in signal routing circuits. |
| -3 dB Bandwidth | 50 MHz | 250 MHz | Determines the maximum signal frequency the device can handle with acceptable gain roll-off. |
| Slew Rate | 350 V/µs | 1000 V/µs | Affects large-signal transient response and distortion at high frequencies. |
| Number of Channels | 1 | 2 (multiplexed inputs) | Channel count and input multiplexing capability determine how many signals can be routed through the device. |
| Supply Voltage Range | ±5 V to ±15 V (dual) | ±5 V to ±15 V (dual) | Must match the system power rails for proper operation and signal headroom. |
| Input Offset Voltage (max) | 0.5 mV | 2 mV | Lower offset improves DC accuracy in precision signal chains. |
| Package / Mounting | 8-lead SOIC (surface mount) | 8-lead SOIC (surface mount, tape and reel) | Footprint and packaging form factor affect PCB layout and assembly compatibility. |
| Output Current | 50 mA | 50 mA | Determines the load-driving capability for cables and low-impedance loads. |
| Multiplexer Control | None | TTL-compatible select pin | The mux select input enables channel switching, a function absent in the plain op-amp. |
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-REEL |
|---|---|---|
| Supplier | - | 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-REEL the same type of device?
No. The AD817AR is a high-speed, low-power operational amplifier from Analog Devices, while the AD8170AR-REEL is a high-speed, 8-lead SOIC video multiplexer/amplifier (a 2:1 multiplexer with an integrated output amplifier) from Analog Devices. They are functionally different devices despite similar part-number prefixes.
What are the key differences in function between the AD817AR and AD8170AR-REEL?
The AD817AR is a general-purpose voltage-feedback op amp intended for signal amplification, buffering, and active filtering. The AD8170AR-REEL is a 2:1 analog multiplexer with an internal output amplifier, designed for switching between two video or signal sources onto a single output, typically in video and display signal routing.
Can the AD817AR be used as a direct substitute for the AD8170AR-REEL?
No. The AD817AR is an operational amplifier and does not provide the 2:1 multiplexing function of the AD8170AR-REEL. Substitution would require external multiplexing circuitry and validation against the target design; the two parts are not pin-for-pin or function-for-function interchangeable.
Do the AD817AR and AD8170AR-REEL share the same package and pinout?
Both devices are offered in 8-lead SOIC (R-8) packages, but their pin functions differ because the AD8170AR-REEL includes multiplexer control and signal-select pins that the AD817AR op amp does not have. Pinout compatibility must be verified against the respective datasheets before any board-level substitution.
What supply voltage ranges do these parts support?
The AD817AR operates from dual supplies of ±5 V to ±15 V (or single supply of 10 V to 30 V). The AD8170AR-REEL operates from ±5 V dual supplies (or 10 V single supply). Designers should confirm the exact recommended operating conditions in the respective Analog Devices datasheets.
Are these devices suitable for video signal routing applications?
The AD8170AR-REEL is specifically intended for video multiplexing and signal routing, with a 2:1 multiplexer and output amplifier optimized for video bandwidth. The AD817AR is a general-purpose high-speed op amp that can be used in video signal chains for buffering or amplification but does not provide source selection on its own.
What does the "-REEL" suffix indicate on the AD8170AR-REEL?
The "-REEL" suffix indicates that the AD8170AR-REEL is supplied in tape-and-reel packaging for automated surface-mount assembly, rather than in tubes or trays. It does not change the electrical function of the device; the base part is the AD8170AR.
Which part should be selected for a design requiring signal switching between two inputs?
The AD8170AR-REEL should be selected when a 2:1 multiplexer with an integrated output amplifier is required, as it provides the switching function in a single 8-lead SOIC package. The AD817AR would require additional external switching components and is not a drop-in solution for that function.