Part A
AD8170AR
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 9338 PCS
- Series
- Interface - Specialized
Replacement verdict
Compatible functional replacement candidate
The AD8174ARZ and AD8170AR are both quad, high-speed, current-feedback operational amplifiers in a 14-lead SOIC package, sharing the same supply voltage range and pinout. While the AD8174ARZ offers higher bandwidth and faster slew rate, the AD8170AR remains a viable functional substitute for applications where its slightly lower performance specifications are acceptable. Designers should validate thermal and dynamic performance in the target circuit before committing to a drop-in replacement.
Package Type
High match
Pin Configuration
High match
Bandwidth
Validation required
Slew Rate
Validation required
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8174ARZ | AD8170AR | Why it matters |
|---|---|---|---|
| Number of Channels | 4 | 2 | Determines how many independent signal paths the multiplexer can switch; a 4-channel part cannot directly replace a 2-channel part in a two-input design without leaving unused inputs. |
| Configuration | 4:1 Multiplexer | 2:1 Multiplexer | Defines the switching topology; the input-to-output selection logic differs, so PCB routing and control signals must match the chosen configuration. |
| -3 dB Bandwidth | 250 MHz | 250 MHz | Sets the maximum signal frequency the device can pass with acceptable attenuation; matching bandwidth means similar high-frequency performance. |
| Slew Rate | 1000 V/µs | 1000 V/µs | Governs how fast the output can respond to large signal swings; identical slew rates indicate comparable large-signal transient behavior. |
| Supply Voltage Range | ±5 V to ±15 V (dual) | ±5 V to ±15 V (dual) | Must match the available power rails; identical ranges allow the parts to operate in the same supply environment. |
| Package | 14-Lead SOIC | 8-Lead SOIC | Footprint and pin count must match the PCB layout; different packages require layout changes and are not drop-in compatible. |
| Output Current | 50 mA | 50 mA | Determines the load-driving capability; equal output current means similar ability to drive cables or low-impedance loads. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Specifies the environmental range for reliable operation; matching ranges ensure both parts suit the same application conditions. |
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Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8170AR | AD8174ARZ |
|---|---|---|
| Part Status | Obsolete | Active |
| Base Product Number | AD8170 | - |
| Applications | Multiplexer with Amplifier | Multiplexer with Amplifier |
| Voltage - Supply | ±4V ~ 6V | ±4V ~ 6V |
| Mounting Type | Surface Mount | - |
| Packaging | Tube | - |
Frequently asked questions
What are the primary differences between the AD8174ARZ and the AD8170AR?
The AD8174ARZ is a quad, low-power, high-speed video amplifier with an integrated 4:1 multiplexer, while the AD8170AR is a single, high-speed, low-power video amplifier with a 2:1 multiplexer. The AD8174ARZ provides four input channels and one output, whereas the AD8170AR provides two input channels and one output. Both are manufactured by Analog Devices and are specified for operation on ±5 V or single +5 V supplies.
Are the AD8174ARZ and AD8170AR pin-compatible?
No. The AD8174ARZ is supplied in a 14-lead SOIC package, while the AD8170AR is supplied in an 8-lead SOIC package. The two devices have different pin counts and pin functions, so they are not drop-in replacements for one another.
What is the -3 dB bandwidth of each device?
According to Analog Devices datasheets, the AD8174ARZ offers a -3 dB bandwidth of 250 MHz (G = +1) and the AD8170AR offers a -3 dB bandwidth of 250 MHz (G = +1). Both are intended for high-speed video and signal-routing applications.
How many multiplexed inputs does each device provide?
The AD8174ARZ integrates a 4:1 multiplexer, allowing selection among four input channels. The AD8170AR integrates a 2:1 multiplexer, allowing selection between two input channels. Channel selection is controlled via TTL-compatible logic inputs.
What are the recommended supply voltages for the AD8174ARZ and AD8170AR?
Both devices are specified for operation on dual ±5 V supplies or a single +5 V supply. Analog Devices datasheets list the operating supply range as ±4.5 V to ±5.5 V for dual supplies and +4.5 V to +5.5 V for single-supply operation.
Can the AD8174ARZ and AD8170AR drive video loads directly?
Yes. Both devices are designed as video amplifiers capable of driving a 150 Ω load (the standard video load) and are specified for driving back-terminated 75 Ω cables. They are suitable for composite video, RGB, and other high-speed signal distribution applications.
What is the quiescent supply current of each device?
Per Analog Devices datasheets, the AD8174ARZ draws a typical quiescent supply current of 6.5 mA, while the AD8170AR draws a typical quiescent supply current of 3.5 mA. The difference reflects the additional multiplexer channels and amplifier stages in the AD8174ARZ.
Are the AD8174ARZ and AD8170AR RoHS compliant?
Yes. The "Z" suffix in AD8174ARZ denotes a RoHS-compliant, lead-free package per Analog Devices ordering information. The AD8170AR is also available in RoHS-compliant versions; designers should confirm the specific orderable part number against the manufacturer's product page before finalizing a bill of materials.