ALD4212PCL Equivalent & Substitute Parts

Part Overview

The ALD4212PCL is a 4-circuit SPST-NO IC switch manufactured by Advanced Linear Devices Inc., housed in a 16-DIP package. This component functions as a single-pole single-throw normally-open switch array with 135Ohm on-state resistance, designed for analog signal routing and switching applications across supply voltages of 3V to 12V (single supply) or ±1.5V to 6V (dual supply). The part is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating.

Equivalent and substitute parts are necessary when the primary part becomes unavailable, when design requirements demand different electrical characteristics such as lower on-state resistance or improved switching speed, or when alternative sourcing is required for cost optimization or supply chain continuity.

Key Parameters

Parameter	ALD4212PCL
Switch Circuit Type	SPST - NO
Number of Circuits	4
Multiplexer/Demultiplexer Circuit	1:1
On-State Resistance (Max)	135Ohm
Channel-to-Channel Matching (ΔRon)	2.7Ohm
Voltage - Supply, Single (V+)	3V ~ 12V
Voltage - Supply, Dual (V±)	±1.5V ~ 6V
Switch Time (Ton, Toff) (Max)	130ns, 130ns
Charge Injection	0.2pC
Channel Capacitance (CS(off), CD(off))	3pF, 3pF
Current - Leakage (IS(off)) (Max)	100pA
Crosstalk	-90dB @ 100kHz
Operating Temperature	-40°C ~ 85°C
Package / Case	16-DIP (0.300", 7.62mm)
Product Status	Active
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the ALD4212PCL is determined by strict adherence to the following electrical and mechanical criteria:

Mandatory Compatibility Parameters:

Switch circuit type must be SPST - NO
Number of circuits must be 4
Multiplexer/Demultiplexer circuit must be 1:1
Package type must be 16-DIP (0.300", 7.62mm)
Operating temperature range must encompass or match -40°C ~ 85°C
Mounting type must be Through Hole

Electrical Performance Parameters (Allowable Variation):

On-state resistance: Substitute parts may have lower resistance values (70Ohm to 135Ohm range acceptable)
Supply voltage ranges: Substitute parts must support the application's required voltage; wider ranges are acceptable
Switch time: Faster switching times are acceptable; slower times require application verification
Charge injection: Lower values are preferred; higher values acceptable if application tolerates
Channel capacitance: Lower values are preferred
Leakage current: Lower values are preferred
Crosstalk: Better isolation (more negative dB values) is preferred

Compliance Requirements:

RoHS3 compliance required
Active or recently active product status preferred; obsolete parts acceptable only with documented justification

Substitute parts are grouped by on-state resistance ranges and supply voltage compatibility to facilitate selection based on specific application requirements.

Parameter Comparison

Part Number	Manufacturer	On-State Resistance (Max)	Voltage - Supply, Single (V+)	Voltage - Supply, Dual (V±)	Switch Time Ton/Toff (Max)	Charge Injection	Current - Leakage (IS(off)) (Max)	Crosstalk	Operating Temperature	Product Status
ALD4212PCL	Advanced Linear Devices Inc.	135Ohm	3V ~ 12V	±1.5V ~ 6V	130ns, 130ns	0.2pC	100pA	-90dB @ 100kHz	-40°C ~ 85°C	Active
ADG202AKNZ	Analog Devices Inc.	90Ohm	10V ~ 15V	±10V ~ 15V	300ns, 250ns	20pC	2nA	-80dB @ 100kHz	-40°C ~ 85°C	Active
ADG442BNZ	Analog Devices Inc.	70Ohm	12V	±15V	110ns, 60ns	1pC	500pA	-100dB @ 1MHz	-40°C ~ 85°C	Active
ADG512BNZ	Analog Devices Inc.	30Ohm (Typ)	3V ~ 5.5V	±4.5V ~ 5.5V	200ns, 120ns (Typ)	11pC	100pA	-85dB @ 1MHz	-40°C ~ 85°C	Active
DG202BDJ-E3	Vishay Siliconix	85Ohm	4.5V ~ 25V	±4.5V ~ 22V	300ns, 200ns	1pC	500pA	-95dB @ 100kHz	-40°C ~ 85°C	Active
DG308ACJ-E3	Vishay Siliconix	100Ohm	—	±15V	200ns, 150ns	-10pC	1nA	—	0°C ~ 70°C	Active
DG308BDJ-E3	Vishay Siliconix	85Ohm	4V ~ 44V	±4V ~ 22V	200ns, 150ns	1pC	500pA	-95dB @ 100kHz	-40°C ~ 85°C	Active
DG442DJ-E3	Vishay Siliconix	85Ohm	12V	±15V	250ns, 210ns	-1pC	500pA	-100dB @ 1MHz	-40°C ~ 85°C	Active

Engineering Selection Recommendations

For Direct Substitution (Minimal Design Impact): DG202BDJ-E3 and DG308BDJ-E3 are recommended as primary substitutes. Both are manufactured by Vishay Siliconix with active product status, ROHS3 compliance, and operating temperature ranges matching the ALD4212PCL (-40°C ~ 85°C). DG202BDJ-E3 offers 85Ohm on-state resistance with extended supply voltage range (4.5V ~ 25V single, ±4.5V ~ 22V dual), while DG308BDJ-E3 provides similar resistance with even broader single-supply capability (4V ~ 44V).

For Low-Resistance Applications: ADG442BNZ (70Ohm) and ADG512BNZ (30Ohm) from Analog Devices Inc. are suitable when reduced on-state resistance is required. ADG442BNZ operates at 12V single or ±15V dual supply with faster switching times (110ns/60ns). ADG512BNZ is optimized for low-voltage applications (3V ~ 5.5V single, ±4.5V ~ 5.5V dual) with the lowest on-state resistance in the substitute group.

For High-Voltage Applications: DG308BDJ-E3 supports the widest single-supply voltage range (4V ~ 44V), making it suitable for applications requiring extended voltage headroom beyond the ALD4212PCL's 3V ~ 12V specification.

Compliance Considerations: All recommended active substitutes maintain ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). DG308ACJ-E3 is active but has a narrower operating temperature range (0°C ~ 70°C) compared to the ALD4212PCL; this part is suitable only for applications within this temperature window.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with lower on-state resistance than the ALD4212PCL? A: Yes. Lower on-state resistance (70Ohm to 100Ohm) reduces signal attenuation and power dissipation in switching applications. Verify that the substitute part's supply voltage range matches your application requirements.

Q: What is the impact of different charge injection values on substitution? A: Charge injection affects signal settling time and accuracy in precision analog switching. The ALD4212PCL has 0.2pC charge injection. Substitutes with higher charge injection (such as ADG202AKNZ at 20pC) may require longer settling time in high-precision applications. Parts with lower charge injection (ADG442BNZ at 1pC) provide improved performance.

Q: Are obsolete parts acceptable as substitutes? A: Obsolete parts (DG308ACJ+, DG442CJ+, DG442DJ+) are not recommended for new designs. These parts have limited availability and may not meet current compliance requirements. Use only active-status substitutes unless documented justification exists for legacy system maintenance.

Q: Does package compatibility matter for through-hole mounting? A: Yes. All substitute parts must use 16-DIP (0.300", 7.62mm) through-hole package to ensure PCB footprint compatibility. Package differences require board redesign.

Q: What supply voltage range should I verify when selecting a substitute? A: Verify that the substitute part's supply voltage specification encompasses your application's operating voltage. For example, if your circuit operates at 5V single supply, ADG512BNZ (3V ~ 5.5V) is compatible, but ADG202AKNZ (10V ~ 15V) is not.

Q: How do crosstalk specifications affect channel isolation? A: Crosstalk measures signal leakage between switch channels. More negative dB values indicate better isolation. The ALD4212PCL specifies -90dB @ 100kHz. Substitutes with better crosstalk performance (such as ADG442BNZ at -100dB @ 1MHz) provide superior channel isolation in multi-channel switching applications.

Q: Can I substitute parts with different operating temperature ranges? A: Only if your application operates within the substitute part's temperature range. The ALD4212PCL operates -40°C ~ 85°C. DG308ACJ-E3 operates 0°C ~ 70°C and is unsuitable for applications requiring full -40°C ~ 85°C coverage.

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