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Product Detailed Parameters
- Description：IC MUX 8:1 300OHM 16CERDIP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Switch Circuit：-
- Multiplexer/Demultiplexer Circuit：8:01
- On-State Resistance (Max)：300Ohm
- Channel-to-Channel Matching (ΔRon)：12Ohm
- Voltage - Supply, Single (V+)：-
- Voltage - Supply, Dual (V±)：±15V
- Switch Time (Ton, Toff) (Max)：800ns, 800ns (Typ)
- -3db Bandwidth：-
- Charge Injection：-
- Channel Capacitance (CS(off), CD(off))：5pF, 30pF
- Current - Leakage (IS(off)) (Max)：2nA
- Crosstalk：-
- Operating Temperature：-25°C ~ 85°C (TA)
- Mounting Type：Through Hole
- Package / Case：16-CDIP (0.300", 7.62mm)
- Supplier Device Package：16-CERDIP
- Number of Circuits：1
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Overview
The AD7503KQ is a monolithic CMOS 8-channel analog multiplexer that switches one of eight inputs to a common output based on three binary address lines and an inverted enable input. It operates with dual supplies up to ±15 V, featuring a typical on-resistance of 170 Ω and maximum of 300 Ω. The device supports turn-on and turn-off times of 0.8 µs, with off-state leakage current limited to 2 nA maximum. Digital inputs are compatible with TTL, DTL, and CMOS logic levels.
Feature Summary
- Inverted enable logic distinguishes the AD7503 from the AD7501 variant
- Direct interface compatibility with TTL, DTL, and CMOS digital logic families
- Industrial temperature range operation from -25°C to +85°C
Applications
- Data acquisition systems requiring analog signal routing
- Process control instrumentation for sensor multiplexing
- Automated test equipment signal switching
- Communication systems for channel selection
Procurement Notes
Verify component obsolescence status prior to design finalization, as the AD7503 family has been discontinued by Analog Devices. Confirm that the KQ suffix denotes the ceramic DIP package and industrial temperature rating. Ensure supply chain sources provide valid traceability documentation for legacy components. Evaluate long-term availability risks associated with end-of-life products in production environments.
Selection Notes
Select the AD7503KQ when inverted enable logic is required for system control architecture. Choose this part over the AD7501KQ if the active-low enable signal simplifies digital interfacing. The KQ suffix indicates suitability for industrial temperature ranges compared to commercial KN versions. Verify that the 300 Ω maximum on-resistance meets the specific application's voltage drop requirements.
Part Context
The AD7503KQ belongs to the AD7501/AD7502/AD7503 family of CMOS analog multiplexers manufactured by Analog Devices. This series provides single-ended switching solutions with direct logic interface capabilities. The KQ designation specifically identifies the industrial temperature grade version housed in a 16-lead ceramic dual in-line package, distinct from plastic or commercial variants within the same functional family.
Replacement Considerations
Publicly confirmed substitutes include the ADG1408YRUZ from Analog Devices. Designers should verify pinout compatibility and electrical parameter alignment when transitioning from the obsolete AD7503KQ to modern alternatives. Package differences between ceramic DIP and surface mount options require mechanical re-evaluation.
