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 AD8174ARZ-R7 are not drop-in replacements for one another. The AD817AR is a single high-speed voltage-feedback operational amplifier in an 8-lead SOIC package, while the AD8174ARZ-R7 is a quad current-feedback amplifier with an internal multiplexer in a 14-lead SOIC package. The differences in channel count, amplifier topology, pinout, and package footprint make direct substitution impractical without circuit redesign.
Different channel count
Different amplifier topology
Different package footprint
Different pin configuration
Parts at a glance
Part B
AD8174ARZ-R7
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4206 PCS
- Package
- SOIC-14
- 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 | AD8174ARZ-R7 | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 1 | 4 | Channel count determines how many independent signal paths can be processed; a single vs quad device is not functionally substitutable in multi-channel designs. |
| -3 dB Bandwidth | 50 MHz | 250 MHz | Bandwidth sets the maximum signal frequency the amplifier can handle with acceptable gain; a large difference affects high-speed signal fidelity. |
| Slew Rate | 350 V/µs | 1600 V/µs | Slew rate limits how fast the output can respond to large signal steps; higher slew rate supports faster large-signal transitions. |
| Supply Voltage Range | ±5 V to ±15 V (dual) | ±5 V to ±15 V (dual) | Operating supply range must match the system rails; both support the same dual-supply window, easing power design compatibility. |
| Input Offset Voltage (max) | 2 mV | 3 mV | Offset voltage contributes DC error at the output; a larger offset reduces precision in DC-coupled applications. |
| Quiescent Supply Current | 7.5 mA | 6.7 mA per amplifier | Quiescent current affects power budget and thermal load; per-amplifier current matters when comparing multi-channel devices. |
| Package / Mounting | 8-Lead SOIC (surface mount) | 14-Lead SOIC (surface mount) | Package footprint and pin count must match the PCB layout; different packages are not drop-in compatible. |
| Output Current (typ) | 50 mA | 50 mA | Output drive capability determines the load the amplifier can drive; matching values support similar load conditions. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Temperature range must cover the application environment; identical ranges indicate comparable environmental robustness. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD817AR | AD8174ARZ-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 AD8174ARZ-R7 functionally interchangeable?
No. The AD817AR is a single high-speed operational amplifier, while the AD8174ARZ-R7 is a quad high-speed operational amplifier. They differ in channel count and package pinout, so they are not direct substitutes.
How do the channel counts of the AD817AR and AD8174ARZ-R7 differ?
The AD817AR contains one operational amplifier per package, whereas the AD8174ARZ-R7 contains four operational amplifiers per package.
What package types are used for the AD817AR and AD8174ARZ-R7?
The AD817AR is supplied in an 8-lead SOIC package, and the AD8174ARZ-R7 is supplied in a 14-lead SOIC package. The different lead counts reflect the single versus quad channel configuration.
Do the AD817AR and AD8174ARZ-R7 share the same supply voltage range?
Both devices are specified for operation on dual supplies of ±5 V to ±15 V, consistent with the AD817 family datasheet. Designers should confirm the exact limits in the respective manufacturer datasheet before use.
Can the AD8174ARZ-R7 be used where an AD817AR single amplifier is required?
Not as a pin-compatible drop-in. The AD8174ARZ-R7 is a quad device in a 14-lead package, so unused channels would need to be terminated and the PCB layout redesigned for the larger footprint.
Are both parts available in RoHS-compliant versions?
The AD8174ARZ-R7 suffix "Z" denotes a RoHS-compliant package per Analog Devices nomenclature. The AD817AR is an older non-Z ordering code; designers should verify the specific orderable part's compliance status in the manufacturer datasheet or distributor listing.
What is the difference in the "R7" suffix on the AD8174ARZ-R7?
The "R7" suffix indicates tape-and-reel packaging in quantities of 750 units per reel, as defined in the Analog Devices ordering guide. The AD817AR ordering code does not include this reel designation.