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ADG428BN Equivalent & Substitute Parts
Part Overview
The ADG428BN is an 8:1 analog multiplexer/demultiplexer IC manufactured by Analog Devices Inc., housed in an 18-DIP package with 100Ohm on-state resistance. This part is currently classified as obsolete, making equivalent substitutes necessary for new designs and production continuity. The ADG428BN operates with single supply (12V) or dual supply (±15V) configurations and is suitable for signal routing applications requiring low on-state resistance and fast switching performance.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Multiplexer/Demultiplexer Circuit | 8:1 |
| Number of Circuits | 1 |
| On-State Resistance (Max) | 100Ohm |
| Channel-to-Channel Matching (ΔRon) | 10Ohm |
| Voltage - Supply, Single (V+) | 12V |
| Voltage - Supply, Dual (V±) | ±15V |
| Switch Time (Ton, Toff) (Max) | 150ns, 150ns |
| Charge Injection | 4pC |
| Channel Capacitance (CS(off), CD(off)) | 11pF, 40pF |
| Current - Leakage (IS(off)) (Max) | 500pA |
| Crosstalk | -85dB @ 1MHz |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Package / Case | 18-DIP (0.300", 7.62mm) |
| Mounting Type | Through Hole |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitution for the ADG428BN is determined by the following critical parameters:
Direct Equivalent Category: Parts maintaining identical electrical specifications and package form factor (18-DIP through-hole).
Similar Functional Category: Parts with 8:1 multiplexer configuration but differing in on-state resistance, package type, or operating characteristics. These require application-level compatibility verification based on impedance requirements and thermal constraints.
The substitution logic is based strictly on:
- Multiplexer/Demultiplexer circuit topology (8:1 configuration)
- On-state resistance compatibility with application requirements
- Package/mounting type compatibility with PCB design
- Supply voltage range compatibility
- Operating temperature range suitability
- Electrical performance parameters (switching speed, crosstalk, leakage current)
Parameter Comparison
| Parameter | ADG428BN (Main) | ADG428BNZ (Direct) | ADG5408BRUZ (Similar) | DG528CJ+ (Similar) | DG528DJ+ (Similar) |
|---|---|---|---|---|---|
| Manufacturer | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc./Maxim Integrated | Analog Devices Inc./Maxim Integrated |
| Multiplexer/Demultiplexer Circuit | 8:1 | 8:1 | 8:1 | 8:1 | 8:1 |
| Number of Circuits | 1 | 1 | 1 | 1 | 1 |
| On-State Resistance (Max) | 100Ohm | 100Ohm | 14Ohm | 450Ohm | 450Ohm |
| Channel-to-Channel Matching (ΔRon) | 10Ohm | 10Ohm | 300mOhm | 27Ohm | 27Ohm |
| Voltage - Supply, Single (V+) | 12V | 12V | 9V ~ 40V | 5V ~ 30V | 5V ~ 30V |
| Voltage - Supply, Dual (V±) | ±15V | ±15V | ±9V ~ 22V | ±4.5V ~ 20V | ±4.5V ~ 20V |
| Switch Time (Ton, Toff) (Max) | 150ns, 150ns | 150ns, 150ns | 165ns, 153ns | 1.5µs, 1.5µs | 1.5µs, 1.5µs |
| Charge Injection | 4pC | 4pC | 155pC | 4pC | 4pC |
| Channel Capacitance (CS(off), CD(off)) | 11pF, 40pF | 11pF, 40pF | 17pF, 98pF | 5pF, 25pF | 5pF, 25pF |
| Current - Leakage (IS(off)) (Max) | 500pA | 500pA | 250pA | 5nA | 5nA |
| Crosstalk | -85dB @ 1MHz | -85dB @ 1MHz | -60dB @ 1MHz | - | - |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 125°C | 0°C ~ 70°C | -40°C ~ 85°C |
| Package / Case | 18-DIP (0.300", 7.62mm) | 18-DIP (0.300", 7.62mm) | 16-TSSOP (0.173", 4.40mm Width) | 18-DIP (0.300", 7.62mm) | 18-DIP (0.300", 7.62mm) |
| Mounting Type | Through Hole | Through Hole | Surface Mount | Through Hole | Through Hole |
| Product Status | Obsolete | Active | Active | Active | Active |
Engineering Selection Recommendations
ADG428BNZ (Direct Equivalent): This part is the recommended primary substitute for ADG428BN. It maintains identical electrical specifications, package form factor, and mounting type. The ADG428BNZ is in active production status with ROHS3 compliance and REACH unaffected certification, ensuring long-term availability and regulatory compliance for new designs.
ADG5408BRUZ (Performance-Enhanced Alternative): This part offers superior on-state resistance (14Ohm vs. 100Ohm) and lower channel-to-channel matching (300mOhm vs. 10Ohm), making it suitable for applications requiring lower impedance paths. However, it uses surface-mount 16-TSSOP packaging instead of through-hole 18-DIP, requiring PCB redesign. The extended operating temperature range (-40°C ~ 125°C) provides thermal margin for demanding environments. Higher charge injection (155pC) and increased channel capacitance may affect signal integrity in precision analog applications.
DG528CJ+ and DG528DJ+ (Legacy Compatibility): These parts maintain the 18-DIP through-hole package and 8:1 multiplexer configuration. However, the 450Ohm on-state resistance is significantly higher than the ADG428BN, introducing greater signal attenuation and impedance loading. The slower switching time (1.5µs vs. 150ns) limits use in high-speed applications. DG528CJ+ operates within 0°C ~ 70°C, restricting use in extended temperature applications. DG528DJ+ supports -40°C ~ 85°C, matching the original part's temperature range. Both parts are active and ROHS3 compliant.
Frequently Asked Questions (FAQ)
Q: Can ADG428BNZ be used as a direct replacement for ADG428BN?
A: Yes. ADG428BNZ is electrically and mechanically identical to ADG428BN, with the same 100Ohm on-state resistance, 18-DIP through-hole package, and operating specifications. The primary difference is product status: ADG428BNZ is active production while ADG428BN is obsolete.
Q: What are the trade-offs when using ADG5408BRUZ instead of ADG428BN?
A: ADG5408BRUZ provides lower on-state resistance (14Ohm) and better channel matching, reducing signal loss and impedance effects. However, it requires surface-mount PCB design instead of through-hole, and exhibits higher charge injection (155pC) which may introduce signal distortion in precision applications. The 16-TSSOP package is physically smaller, affecting board layout.
Q: Are DG528 series parts suitable replacements for high-speed applications?
A: No. DG528CJ+ and DG528DJ+ have 1.5µs switching time, approximately 10 times slower than ADG428BN (150ns). These parts are unsuitable for applications requiring fast channel switching or high-frequency signal routing.
Q: What is the impact of higher on-state resistance in DG528 parts?
A: The 450Ohm on-state resistance in DG528CJ+ and DG528DJ+ creates significant impedance loading compared to ADG428BN's 100Ohm. This increases signal attenuation, reduces bandwidth, and may require impedance matching networks in the application circuit.
Q: Which substitute part is best for extended temperature operation?
A: ADG5408BRUZ supports -40°C ~ 125°C, providing the widest temperature range. For through-hole packages, DG528DJ+ supports -40°C ~ 85°C, matching ADG428BN's range. DG528CJ+ is limited to 0°C ~ 70°C and is unsuitable for industrial or automotive temperature requirements.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. ADG428BNZ, ADG5408BRUZ, DG528CJ+, and DG528DJ+ are all ROHS3 compliant with REACH unaffected status, meeting current environmental and regulatory requirements.
Q: What package considerations apply when selecting a substitute?
A: ADG428BNZ, DG528CJ+, and DG528DJ+ use 18-DIP through-hole packages, compatible with existing PCB designs. ADG5408BRUZ uses 16-TSSOP surface-mount packaging, requiring PCB redesign and different assembly processes. Through-hole parts are suitable for prototyping and rework; surface-mount parts are optimized for high-volume automated assembly.
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