Part A
ADG508AKNZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5168 PCS
- Package
- PDIP-16
- Series
- Interface - Conmutadores analógicos, Multiplexers, Demultiplexeres
Replacement verdict
Compatible functional replacement candidate
The ADG508AKN and ADG508AKNZ are functionally equivalent CMOS analog multiplexers sharing the same 8-channel single-ended architecture, 16-pin DIP footprint, and electrical specifications; the suffix difference reflects a packaging/lead-finish revision rather than a functional change, so the ADG508AKNZ is a viable replacement candidate for the ADG508AKN subject to final validation of the lead finish and assembly site against the target application's qualification requirements.
Channel Configuration
High match
Package Type
High match
Supply Voltage Range
High match
Lead Finish and Assembly Site
Validation required
Parts at a glance
Part B
ADG508AKN
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 8784 PCS
- Series
- Interface - Conmutadores analógicos, Multiplexers, Demultiplexeres
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | ADG508AKNZ | ADG508AKN | Why it matters |
|---|---|---|---|
| Package / Mounting | 16-Lead PDIP (through-hole) | 16-Lead PDIP (through-hole) | Both are through-hole PDIP, but the NZ suffix denotes a lead-free/RoHS-compliant molding compound, which affects solderability and compliance requirements. |
| RoHS / Lead-Free Status | RoHS compliant, lead-free | Contains lead (non-RoHS legacy) | RoHS compliance is often mandatory for new designs and exports; the non-compliant version may be restricted in many markets. |
| Number of Channels | 8 channels (1-of-8 multiplexer) | 8 channels (1-of-8 multiplexer) | Channel count determines how many signal sources can be routed to a common output, directly affecting circuit architecture. |
| Switch Configuration | 8:1 multiplexer | 8:1 multiplexer | The multiplexer topology must match the signal-routing requirement for functional substitutability. |
| On-Resistance (R_ON) | ~280 Ω typical | ~280 Ω typical | On-resistance affects signal attenuation and voltage drop; matching values ensure equivalent analog performance. |
| Supply Voltage Range | ±15 V dual (or +12 V single) | ±15 V dual (or +12 V single) | The supply range must be compatible with the system rails to avoid damage and ensure proper switching. |
| Switching Time (t_ON / t_OFF) | ~250 ns / ~250 ns | ~250 ns / ~250 ns | Switching speed determines the maximum multiplexing rate and settling behavior in the application. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | Temperature range must cover the application environment for reliable operation. |
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 | ADG508AKNZ | ADG508AKN |
|---|---|---|
| Part Status | Active | Obsolete |
| Multiplexer / Demultiplexer Circuit | 8:1 | 8:1 |
| Number of Circuits | 1 | 1 |
| On - State Resistance (Max) | - | 300Ohm |
| Channel - to - Channel Matching (ΔRon) | - | 15Ohm |
| Voltage - Supply, Single (V+) | 10.8V ~ 16.5V | 10.8V ~ 16.5V |
| Voltage - Supply, Dual (V±) | ±10.8V ~ 16.5V | ±10.8V ~ 16.5V |
| Switch Time (Ton, Toff) (Max) | - | 300ns, 300ns |
| Charge Injection | 4pC | 4pC |
| Channel Capacitance (CS(off), CD(off)) | - | 5pF, 22pF |
| Current - Leakage (IS(off)) (Max) | - | 1nA |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Through Hole | Through Hole |
| Base Product Number | - | ADG508 |
| On - State Resistance(Max) | 300Ohm | - |
| Channel - to - Channel Matching(ΔRon) | 15Ohm | - |
| Switch Time(Ton Toff)(Max) | 300ns, 300ns | - |
| Channel Capacitance(CS(off)CD(off)) | 5pF, 22pF | - |
| Current - Leakage(IS(off))(Max) | 1nA | - |
Frequently asked questions
What is the difference between the ADG508AKNZ and the ADG508AKN?
The ADG508AKNZ and ADG508AKN are both 8-channel analog multiplexers from Analog Devices in a 16-lead PDIP package. The primary difference is the package/ordering suffix: the "Z" suffix in ADG508AKNZ denotes a lead-free (Pb-free/RoHS-compliant) package, while the ADG508AKN is the older leaded (non-RoHS) version. Functionally and electrically they are the same device.
Are the ADG508AKNZ and ADG508AKN electrically identical?
Yes. Both parts share the same datasheet specifications for the ADG508A: 8-channel multiplexing, on-resistance in the tens of ohms range, single-supply operation from approximately 10.8 V to 16.5 V or dual-supply operation up to ±16.5 V, and TTL/CMOS-compatible logic inputs. The "Z" designation affects package material/plating, not the silicon or electrical parameters.
Can the ADG508AKNZ be used as a drop-in replacement for the ADG508AKN?
Yes, in most cases. Both are 16-lead PDIP devices with the same pinout and identical electrical specifications, so the ADG508AKNZ can replace the ADG508AKN in existing through-hole designs. The ADG508AKNZ is the Pb-free/RoHS-compliant variant, which is preferred for new designs and for compliance with lead-free assembly requirements.
What is the pin configuration of the ADG508AKNZ and ADG508AKN?
Both devices use a 16-lead PDIP package with the standard ADG508A pinout: address inputs A0, A1, A2; enable input EN; eight analog channels S1 through S8; the common drain D; and positive/negative supply pins VDD and VSS along with GND. The pinout is identical between the two orderable part numbers.
What supply voltages do the ADG508AKNZ and ADG508AKN support?
Both parts operate from a single supply of approximately 10.8 V to 16.5 V, or from dual supplies up to ±16.5 V, with TTL/CMOS-compatible logic inputs. These ratings are common to the ADG508A family and apply equally to the ADG508AKNZ and ADG508AKN.
Which part should be selected for a new RoHS-compliant design?
The ADG508AKNZ should be selected. Its "Z" suffix indicates a lead-free, RoHS-compliant package, which is required for most new commercial and industrial designs. The ADG508AKN is the legacy leaded version and is generally not suitable where RoHS compliance is mandated.
Are the ADG508AKNZ and ADG508AKN still available from distributors?
Availability varies. The ADG508AKNZ is the currently recommended Pb-free orderable part number and is generally the more readily available variant through authorized distributors such as DigiKey and Mouser. The ADG508AKN leaded version may be obsolete or limited in stock, so designers should verify current inventory and lifecycle status with the distributor or Analog Devices before specifying it.