Part A
AD8170AR
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 9338 PCS
- Series
- Interface - Specialized
Replacement verdict
Compatible functional replacement candidate
The AD8170ARZ and AD8170AR are functionally equivalent 2:1 multiplexer amplifiers from Analog Devices, sharing the same SOIC-8 package, supply voltage range, and signal path architecture. The AD8170ARZ is the RoHS-compliant lead-free version of the AD8170AR, making it a suitable drop-in replacement in most designs, provided the user validates lead-free solder process compatibility and confirms the exact grade suffix requirements for the target application.
Function and Topology
High match
Package Type
High match
Supply Voltage Range
High match
RoHS and Lead-Free Status
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 | AD8170ARZ | AD8170AR | Why it matters |
|---|---|---|---|
| Manufacturer | Analog Devices Inc. | Analog Devices Inc. | Same manufacturer ensures consistent design, documentation, and support. |
| Function | 2:1 Multiplexer, current feedback amplifier | 2:1 Multiplexer, current feedback amplifier | Identical core function confirms the parts are functionally interchangeable. |
| Package / Case | 8-Lead SOIC (R-8) | 8-Lead SOIC (R-8) | Same footprint allows drop-in board replacement without layout changes. |
| Number of Channels | 2:1 (single output) | 2:1 (single output) | Channel count must match for the multiplexing topology to remain valid. |
| Supply Voltage Range | ±5 V to ±15 V (dual) | ±5 V to ±15 V (dual) | Matching supply range ensures compatibility with the existing power design. |
| -3 dB Bandwidth | 250 MHz (G = +2) | 250 MHz (G = +2) | Bandwidth determines signal fidelity for high-speed video and RF applications. |
| Slew Rate | 1000 V/µs | 1000 V/µs | Slew rate affects large-signal transient response and settling behavior. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Temperature range must cover the target environment for reliable operation. |
| RoHS / Lead-Free Status | RoHS compliant, lead-free | Non-RoHS, contains lead | RoHS status affects regulatory compliance and solder process compatibility. |
| Packaging / Ordering Suffix | Z suffix (lead-free, tube) | No Z suffix (leaded, tube) | Suffix indicates environmental variant and may affect availability and compliance. |
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 | AD8170AR | AD8170ARZ |
|---|---|---|
| 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 is the difference between AD8170ARZ and AD8170AR?
The AD8170ARZ and AD8170AR are functionally identical 8-lead SOIC (R-8) packaged 2:1 multiplexers with internal current feedback amplifiers. The primary difference is the suffix: the "Z" designation in AD8170ARZ indicates RoHS-compliant, lead-free (Pb-free) construction, whereas AD8170AR is the non-RoHS leaded version. Both share the same electrical specifications per the Analog Devices datasheet.
Are AD8170ARZ and AD8170AR electrically interchangeable?
Yes. Both parts are specified with the same key parameters: -3 dB bandwidth of 250 MHz (G = +2), 0.1 dB flatness to 70 MHz, slew rate of 1000 V/µs, and 0.02%/0.04° differential gain/phase. They operate from ±5 V or single +5 V to +12 V supplies and are pin-compatible in the same 8-lead SOIC package.
Can AD8170ARZ be used as a drop-in replacement for AD8170AR?
Yes, in most cases. Because both devices share the same die, pinout, package (8-lead SOIC), and electrical specifications, AD8170ARZ is a direct drop-in replacement for AD8170AR. The only practical consideration is that AD8170ARZ is RoHS-compliant, which may affect solder process and compliance requirements rather than circuit performance.
What is the function of the AD8170ARZ/AD8170AR multiplexer?
Both devices are 2:1 analog multiplexers with an integrated current feedback amplifier. They select between two input channels (IN0 and IN1) via a TTL/CMOS-compatible logic control pin and drive a single buffered output, making them suitable for video switching, RGB routing, and high-speed signal selection applications.
What supply voltage and power consumption do AD8170ARZ and AD8170AR support?
Both parts operate over a supply range of ±5 V (dual) or +5 V to +12 V (single supply). Typical quiescent supply current is approximately 7.5 mA per the Analog Devices datasheet, and the devices are specified for operation over the industrial temperature range of -40°C to +85°C.
Do AD8170ARZ and AD8170AR differ in packaging or pinout?
No. Both are offered in the same 8-lead SOIC (R-8) package with identical pin assignments: channel inputs, logic select, output, and supply pins. The "Z" suffix denotes RoHS/lead-free material composition only and does not change the package outline or pinout.
Which part should be selected for a new RoHS-compliant design?
AD8170ARZ should be selected for new designs requiring RoHS compliance, as it is the lead-free (Pb-free) variant. AD8170AR is the legacy leaded version and is generally not recommended for new RoHS-restricted designs, though it remains electrically equivalent for existing non-RoHS assemblies.