Part A
AD817AR
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 2887 PCS
- Package
- SOIC-8
- Series
- Linear - Amplificadores - Instrumentação, OP Amps, Buffer Amps
Replacement verdict
Not a drop-in replacement
The AD817AR and AD8170ARZ-R7 are not functionally interchangeable. The AD817AR is a single high-speed voltage-feedback operational amplifier, while the AD8170ARZ-R7 is a dual-channel multiplexer-amplifier with an integrated 2:1 switch. Their differing channel count, internal signal routing architecture, and package pinout prevent direct substitution in existing designs without circuit redesign.
Different channel count
Different internal architecture
Different pinout
Different signal routing
Parts at a glance
Part B
AD8170ARZ-R7
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4605 PCS
- Package
- SOIC-8
- Series
- Interface - Especializada
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 | AD8170ARZ-R7 | Why it matters |
|---|---|---|---|
| Amplifier Type | General Purpose Voltage Feedback Op Amp | Multiplexer Amplifier (2:1 Mux) | Defines the core function; one is a standalone op amp, the other integrates a 2:1 multiplexer, so they are not direct substitutes. |
| Number of Channels | 1 | 2 (multiplexed inputs, single output) | Channel count affects how many signals can be handled and the circuit topology. |
| -3 dB Bandwidth | 50 MHz | 250 MHz | Bandwidth determines the maximum signal frequency the device can process with acceptable gain. |
| Slew Rate | 350 V/µs | 1000 V/µs | Slew rate limits large-signal high-frequency performance and distortion. |
| Supply Voltage Range | ±5 V to ±15 V (dual) | ±5 V to ±15 V (dual) | Determines compatibility with the system power rails. |
| Input Offset Voltage (max) | 0.5 mV | 5 mV | Offset voltage affects DC accuracy and error in precision signal chains. |
| Package / Mounting | 8-Lead SOIC (surface mount) | 8-Lead SOIC (surface mount) | Package compatibility is required for physical board replacement. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Ensures the part meets the environmental requirements of the application. |
| Integrated Multiplexer | No | Yes (2:1) | The mux enables input switching; its absence or presence fundamentally changes circuit design and substitutability. |
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 | AD8170ARZ-R7 |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Part Status | Obsolete | Active |
| 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 AD8170ARZ-R7 functionally interchangeable?
No. The AD817AR is a high-speed, low-power operational amplifier, while the AD8170ARZ-R7 is a 2:1 multiplexer amplifier (mux-amp). They serve different signal-chain functions and are not direct substitutes despite similar naming.
What are the key differences in function between the AD817AR and AD8170ARZ-R7?
The AD817AR is a single voltage-feedback op amp intended for general high-speed amplification. The AD8170ARZ-R7 integrates a 2:1 analog multiplexer with an output amplifier, allowing selection between two input channels, which the AD817AR cannot do.
Do the AD817AR and AD8170ARZ-R7 use the same package and pinout?
Both are offered in 8-lead SOIC packages, but their pin functions differ because the AD8170ARZ-R7 includes multiplexer control and two signal inputs. Pin-to-pin replacement is therefore not possible without circuit redesign.
How do the bandwidth specifications compare between the AD817AR and AD8170ARZ-R7?
The AD817AR provides a unity-gain bandwidth of approximately 50 MHz. The AD8170ARZ-R7 mux-amp provides a -3 dB bandwidth of approximately 250 MHz for its amplifier channel. These figures reflect different measurement conditions and device architectures.
Can the AD8170ARZ-R7 be used as a drop-in replacement for the AD817AR in an existing amplifier circuit?
No. The AD8170ARZ-R7 requires multiplexer select control and has a different internal signal path. Substitution requires verifying pin functions, control logic, gain configuration, and PCB layout against the respective datasheets.
What supply voltage ranges do the AD817AR and AD8170ARZ-R7 support?
Both devices operate from dual supplies of ±5 V to ±15 V, consistent with their datasheet specifications. Actual allowable range and performance should be confirmed against the manufacturer datasheet for each part.
Which part is better suited for video signal routing applications?
The AD8170ARZ-R7 is better suited for video routing because its integrated 2:1 multiplexer enables channel selection, and its high bandwidth supports video signal switching. The AD817AR is a general-purpose op amp without multiplexing capability.
Are the AD817AR and AD8170ARZ-R7 RoHS compliant?
The AD8170ARZ-R7 carries the "Z" suffix indicating RoHS-compliant packaging per Analog Devices nomenclature. The AD817AR is an older non-Z grade and may not be RoHS compliant. Compliance should be verified from the specific ordering code and manufacturer documentation.