Part A
AD7502JN
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 1654 PCS
- Package
- DIP-16
- Series
- Interface - Analog Switches, Multiplexers, Demultiplexers
Replacement verdict
Compatible functional replacement candidate
The AD7502JN and AD7501JN are both CMOS analog multiplexers from the same AD750x family, sharing a common 16-pin DIP footprint and similar supply and temperature specifications. However, they differ in channel configuration and switching function, so the AD7502JN is not a direct drop-in substitute for the AD7501JN in circuits that depend on the specific multiplexer topology. Designers should confirm the channel arrangement and switching behavior against the target application before substituting.
Channel Configuration
Validation required
Switch Function
Validation required
Package Type
High match
Supply Voltage Range
High match
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD7502JN | AD7501JN | Why it matters |
|---|---|---|---|
| Number of Channels | 2 (differential, 4 channels each) | 8 (single-ended) | Determines whether the device switches differential pairs or single-ended signals, directly affecting signal routing architecture. |
| Switch Configuration | Dual 4:1 (differential) | 8:1 (single-ended) | Defines the multiplexer topology and how many inputs can be routed to a common output. |
| On-Resistance (RON) | ~300 Ω | ~300 Ω | Affects signal attenuation and accuracy; lower RON reduces voltage drop across the switch. |
| Supply Voltage | ±15 V (dual) | ±15 V (dual) | Must match the system power rails for proper analog signal swing and switch operation. |
| Package | 16-pin PDIP | 16-pin PDIP | Footprint compatibility determines whether the part can be dropped into an existing PCB layout. |
| Operating Temperature Range | 0°C to +70°C (commercial) | 0°C to +70°C (commercial) | Ensures reliable operation within the intended ambient environment. |
| Logic Input Compatibility | TTL/CMOS compatible | TTL/CMOS compatible | Allows direct interfacing with standard digital control logic without level shifting. |
| Channel Address Lines | 2 address lines (A0, A1) + enable | 3 address lines (A0, A1, A2) + enable | Determines the number of control signals required and the addressing scheme for channel selection. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD7502JN | AD7501JN |
|---|---|---|
| Supplier | Rochester Electronics, LLC | Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Mounting Type | Through Hole | Through Hole |
| Switch Circuit | SP4T | - |
| Multiplexer / Demultiplexer Circuit | 4:1 | - |
| Number of Circuits | 2 | - |
| On - State Resistance(Max) | 300Ohm | - |
| Channel - to - Channel Matching(ΔRon) | 12Ohm | - |
| Voltage - Supply, Single (V+) | ±15V | - |
| Voltage - Supply, Dual (V±) | ±15V | - |
| Switch Time(Ton Toff)(Max) | 800ns, 800ns | - |
| Channel Capacitance(CS(off)CD(off)) | 5pF | - |
| Current - Leakage(IS(off))(Max) | 2nA | - |
| Operating Temperature | -25°C ~ 85°C | - |
Frequently asked questions
What is the primary functional difference between the AD7502JN and the AD7501JN?
The AD7501JN is a single 8-channel CMOS analog multiplexer, while the AD7502JN is a differential 4-channel CMOS analog multiplexer. Both are designed to connect one of several analog inputs to a common output, but the AD7502JN switches differential pairs rather than single-ended channels.
Are the AD7502JN and AD7501JN pin-compatible?
No. The AD7501JN is typically supplied in a 16-pin DIP package, whereas the AD7502JN is supplied in an 18-pin DIP package. The pin counts and pin functions differ, so they are not drop-in replacements for each other.
What are the key analog switch specifications for these devices?
Both the AD7501JN and AD7502JN are CMOS analog multiplexers featuring low on-resistance, low leakage current, and TTL/CMOS-compatible digital control inputs. They operate from dual power supplies (typically ±15 V) and are specified for break-before-make switching to minimize channel-to-channel crosstalk during transitions.
Can the AD7501JN be used to switch differential signals?
No. The AD7501JN is an 8-channel single-ended multiplexer and is not configured to switch differential signal pairs. For differential signal switching, the AD7502JN, which provides 4 differential channels, is the appropriate choice.
What digital control interface do the AD7501JN and AD7502JN use?
Both devices use binary-coded channel address inputs to select the active channel. The AD7501JN uses a 3-bit address to select one of eight single-ended channels, while the AD7502JN uses a 2-bit address to select one of four differential channel pairs. Both include an enable input for device selection.
Are the AD7502JN and AD7501JN still in active production?
These devices are legacy Analog Devices CMOS multiplexers. Availability should be verified against current Analog Devices product lifecycle status and authorized distributor inventory, as many parts in this family have been discontinued or are offered only as limited or obsolete stock.
What are typical applications for the AD7501JN versus the AD7502JN?
The AD7501JN is typically used for single-ended signal routing such as multi-channel data acquisition, test equipment, and process control front ends. The AD7502JN is used where differential signal integrity is required, such as differential sensor interfaces, bridge measurement, and instrumentation amplifiers with differential inputs.