DG300AC/D Equivalent & Substitute Parts

Part Overview

The DG300AC/D is a 2-circuit IC switch manufactured by Analog Devices Inc./Maxim Integrated, designed for interface applications requiring SPST-NO (Single Pole Single Throw - Normally Open) switching functionality. This die-format component features 50Ohm on-state resistance and operates across dual supply voltages of ±5V to ±18V. The product is currently obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Key Parameters

Parameter	DG300AC/D
Switch Circuit Type	SPST - NO
Number of Circuits	2
On-State Resistance (Max)	50Ohm
Multiplexer/Demultiplexer Circuit	1:1
Voltage - Supply, Dual (V±)	±5V ~ 18V
Switch Time (Ton, Toff) (Max)	300ns, 250ns
Channel-to-Channel Matching (ΔRon)	1.25Ohm
Charge Injection	12pC
Current - Leakage (IS(off)) (Max)	1nA
Operating Temperature	0°C ~ 70°C
Package / Case	Die
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the DG300AC/D is determined by the following critical parameters:

Switch Circuit Configuration: The DG300AC/D operates as SPST-NO (Normally Open). Substitute parts must maintain 2-circuit switching capability with compatible control logic.
On-State Resistance: Maximum 50Ohm specification defines signal path impedance. Substitutes with lower on-state resistance (2.5Ohm) provide improved performance characteristics while maintaining functional compatibility.
Supply Voltage Range: Dual supply operation (±5V ~ 18V) is a core requirement. Substitutes must support equivalent or broader voltage ranges.
Number of Circuits: The 2-circuit configuration is mandatory for functional equivalence.
Multiplexer/Demultiplexer Ratio: The 1:1 circuit ratio must be preserved.
Switching Speed and Charge Injection: These parameters affect signal integrity and timing performance in switching applications.
Package Compatibility: Die format in the original part may require integration into hybrid or custom packaging. Substitutes in standard packages (16-SOIC) offer alternative implementation paths.

The MAX4667ESE+ qualifies as a substitute based on matching 2-circuit configuration, 1:1 multiplexer ratio, and compatible supply voltage specifications, despite differences in switch circuit type (SPST-NC vs. SPST-NO) and on-state resistance values.

Parameter Comparison

Parameter	DG300AC/D	MAX4667ESE+
Manufacturer	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated
Category	Interface	Interface
Switch Circuit Type	SPST - NO	SPST - NC
Number of Circuits	2	2
Multiplexer/Demultiplexer Circuit	1:1	1:1
On-State Resistance (Max)	50Ohm	2.5Ohm
Channel-to-Channel Matching (ΔRon)	1.25Ohm	50mOhm
Voltage - Supply, Single (V+)	Not specified	4.5V ~ 36V
Voltage - Supply, Dual (V±)	±5V ~ 18V	±4.5V ~ 20V
Switch Time (Ton, Toff) (Max)	300ns, 250ns	275ns, 175ns
Charge Injection	12pC	450pC
Channel Capacitance (CS(off), CD(off))	14pF, 14pF	65pF, 65pF
Current - Leakage (IS(off)) (Max)	1nA	500pA
Crosstalk	-74dB @ 500kHz	-66dB @ 1MHz
Operating Temperature	0°C ~ 70°C	-40°C ~ 85°C
Mounting Type	Surface Mount	Surface Mount
Package / Case	Die	16-SOIC (0.154", 3.90mm Width)
Product Status	Obsolete	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

The MAX4667ESE+ is an active product from the same manufacturer family, providing continuity of supply and technical support. Both components maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for new designs and legacy system support.

The transition from die format (DG300AC/D) to 16-SOIC package (MAX4667ESE+) represents a shift from hybrid integration to standard IC packaging. This change simplifies procurement, reduces custom packaging requirements, and improves long-term availability.

The MAX4667ESE+ offers superior on-state resistance (2.5Ohm vs. 50Ohm), lower channel-to-channel matching variation (50mOhm vs. 1.25Ohm), and faster turn-off time (175ns vs. 250ns). The extended operating temperature range (-40°C ~ 85°C vs. 0°C ~ 70°C) provides broader environmental compatibility.

Design consideration: The MAX4667ESE+ implements SPST-NC (Normally Closed) switching logic, requiring circuit topology adjustment compared to the SPST-NO configuration of the DG300AC/D. Dual supply voltage ranges overlap sufficiently (±4.5V ~ 20V for MAX4667ESE+ encompasses the ±5V ~ 18V requirement of DG300AC/D).

Frequently Asked Questions (FAQ)

Q: Can the MAX4667ESE+ directly replace the DG300AC/D without circuit modifications?

A: Direct pin-for-pin replacement is not applicable due to package format differences (die vs. 16-SOIC). Additionally, the switch circuit type differs (SPST-NC vs. SPST-NO), requiring logic inversion in control signals. Circuit topology review is necessary.

Q: What are the key compatibility factors for substitution?

A: The critical factors are: 2-circuit configuration, 1:1 multiplexer ratio, compatible dual supply voltage ranges (±4.5V ~ 20V for MAX4667ESE+ covers ±5V ~ 18V requirement), and surface mount technology. On-state resistance and switching speed differences are secondary considerations that may improve system performance.

Q: How does the SPST-NC configuration of the MAX4667ESE+ differ from the SPST-NO of the DG300AC/D?

A: SPST-NO (Normally Open) maintains an open circuit until activated. SPST-NC (Normally Closed) maintains a closed circuit until activated. This fundamental difference requires inverting the control logic in the application circuit.

Q: Are there supply voltage compatibility concerns?

A: The MAX4667ESE+ supports ±4.5V ~ 20V dual supply, which encompasses the DG300AC/D requirement of ±5V ~ 18V. The broader range provides additional design flexibility. Single supply operation (4.5V ~ 36V) is also available on the MAX4667ESE+.

Q: What packaging considerations apply to the substitution?

A: The DG300AC/D die format requires custom hybrid packaging or integration into a larger assembly. The MAX4667ESE+ 16-SOIC package is a standard surface mount component, simplifying procurement, assembly, and inventory management.

Q: Does the MAX4667ESE+ meet the same regulatory requirements?

A: Yes. Both components are ROHS3 compliant, REACH unaffected, and carry identical environmental compliance certifications (MSL 1 - Unlimited).

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