MAX543ACSA 12-Bit Digital to Analog Converter Equivalent & Substitute Parts

Part Overview

The MAX543ACSA is a 12-bit digital to analog converter (DAC) manufactured by Analog Devices Inc./Maxim Integrated, designed for data acquisition applications requiring current output conversion. This component features an R-2R architecture with 1µs settling time and operates with external voltage references. The MAX543ACSA is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations. Active alternatives with compatible electrical and mechanical specifications are available from the same manufacturer family.

Key Parameters

Parameter	Value
Resolution	12 Bit
Number of D/A Converters	1
Output Type	Current - Unbuffered
Data Interface	SPI
Reference Type	External
Settling Time	1µs
Architecture	R-2R
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Operating Temperature Range	0°C ~ 70°C
INL/DNL (LSB)	±0.5 (Max)
Voltage - Supply, Analog	5V, 11.4V ~ 15.75V
Voltage - Supply, Digital	5V, 11.4V ~ 15.75V

Substitute Part Grouping Explanation

Substitution of the MAX543ACSA is determined by strict equivalence across the following critical parameters: 12-bit resolution, single D/A converter configuration, current output (unbuffered), SPI data interface, external reference requirement, 1µs settling time, R-2R architecture, and 8-SOIC surface mount package. All substitute parts maintain identical package dimensions (0.154", 3.90mm width) and mounting specifications to ensure mechanical and electrical compatibility.

Substitute parts are grouped into two categories based on operating temperature range and INL/DNL specifications:

Category 1 - Direct Equivalents (Matching Temperature & Accuracy): MAX543ACSA+ maintains the original 0°C ~ 70°C operating range with ±0.5 LSB INL/DNL specifications.

Category 2 - Extended Temperature Range Alternatives: DAC8043A1FSZ, DAC8043AFSZ, DAC8043AFSZ-REEL7, LTC8043ES8#PBF, LTC8043ES8#TRPBF, and LTC8043FS8#PBF/TRPBF operate across -40°C ~ 85°C with either ±0.5 or ±1 LSB INL/DNL specifications. These parts are suitable for applications requiring broader temperature operation.

All substitute parts share identical SPI interface, external reference architecture, and 8-SOIC package specifications with the MAX543ACSA.

Parameter Comparison

Part Number	Manufacturer	Product Status	Resolution (Bit)	Output Type	Data Interface	Settling Time	Architecture	Operating Temp (°C)	INL/DNL (LSB)	Package	RoHS Status	Inventory (Pcs)
MAX543ACSA	Analog Devices Inc./Maxim Integrated	Obsolete	12	Current - Unbuffered	SPI	1µs	R-2R	0 ~ 70	±0.5	8-SOIC	Non-compliant	3696
MAX543ACSA+	Analog Devices Inc./Maxim Integrated	Active	12	Current - Unbuffered	SPI	1µs	R-2R	0 ~ 70	±0.5	8-SOIC	ROHS3 Compliant	1105
DAC8043A1FSZ	Analog Devices Inc.	Active	12	Current - Unbuffered	SPI	1µs	R-2R	-40 ~ 85	±1	8-SOIC	ROHS3 Compliant	1819
DAC8043AFSZ	Analog Devices Inc.	Active	12	Current - Unbuffered	SPI	1µs	R-2R	-40 ~ 85	±1	8-SOIC	ROHS3 Compliant	1724
DAC8043AFSZ-REEL7	Analog Devices Inc.	Active	12	Current - Unbuffered	SPI	1µs	R-2R	-40 ~ 85	±1	8-SOIC	ROHS3 Compliant	1955
LTC8043ES8#PBF	Analog Devices Inc.	Active	12	Current - Unbuffered	SPI	1µs	R-2R	-40 ~ 85	±0.5	8-SOIC	ROHS3 Compliant	2204
LTC8043ES8#TRPBF	Analog Devices Inc.	Active	12	Current - Unbuffered	SPI	1µs	R-2R	-40 ~ 85	±0.5	8-SOIC	ROHS3 Compliant	3100
LTC8043FS8#PBF	Analog Devices Inc.	Active	12	Current - Unbuffered	SPI	1µs	R-2R	-40 ~ 85	±1	8-SOIC	ROHS3 Compliant	1697
LTC8043FS8#TRPBF	Analog Devices Inc.	Active	12	Current - Unbuffered	SPI	1µs	R-2R	-40 ~ 85	±1	8-SOIC	ROHS3 Compliant	2900

Engineering Selection Recommendations

For Direct Replacement (Identical Operating Range): MAX543ACSA+ is the primary substitute when the original 0°C ~ 70°C operating temperature specification must be maintained. This part is active, ROHS3 compliant, and maintains ±0.5 LSB INL/DNL accuracy matching the original MAX543ACSA.

For Extended Temperature Applications: When operating temperature range must extend to -40°C ~ 85°C, select from the DAC8043 or LTC8043 series. DAC8043A1FSZ and DAC8043AFSZ provide ±1 LSB INL/DNL specifications. LTC8043ES8#PBF and LTC8043ES8#TRPBF maintain ±0.5 LSB INL/DNL for applications requiring higher accuracy across the extended temperature range. LTC8043FS8#PBF and LTC8043FS8#TRPBF operate with ±1 LSB INL/DNL.

For Packaging Considerations: DAC8043AFSZ-REEL7 and LTC8043ES8#TRPBF and LTC8043FS8#TRPBF are supplied in Tape & Reel format for high-volume production. Tube packaging is available for DAC8043A1FSZ, DAC8043AFSZ, LTC8043ES8#PBF, and LTC8043FS8#PBF.

All substitute parts are ROHS3 compliant and REACH unaffected, meeting modern regulatory requirements. The MAX543ACSA is RoHS non-compliant, making active substitutes necessary for new designs subject to RoHS regulations.

Frequently Asked Questions (FAQ)

Q: Can MAX543ACSA+ be used as a direct replacement for MAX543ACSA?

A: Yes. MAX543ACSA+ maintains identical electrical specifications (12-bit resolution, 1µs settling time, ±0.5 LSB INL/DNL, 0°C ~ 70°C operating range) and mechanical compatibility (8-SOIC package). The primary difference is product status (active vs. obsolete) and RoHS compliance (ROHS3 vs. non-compliant).

Q: What is the difference between DAC8043A1FSZ and DAC8043AFSZ?

A: Both parts are electrically identical with 12-bit resolution, 1µs settling time, ±1 LSB INL/DNL, and -40°C ~ 85°C operating range. The difference is packaging: DAC8043A1FSZ is supplied in Tube format, while DAC8043AFSZ is also available in Tube. DAC8043AFSZ-REEL7 is the Tape & Reel variant of DAC8043AFSZ.

Q: Why do LTC8043 parts have different accuracy specifications (±0.5 vs. ±1 LSB)?

A: LTC8043ES8 series maintains ±0.5 LSB INL/DNL specifications, matching the original MAX543ACSA accuracy. LTC8043FS8 series operates with ±1 LSB INL/DNL. Selection depends on application accuracy requirements. Both series operate across -40°C ~ 85°C.

Q: Are all substitute parts pin-compatible with MAX543ACSA?

A: All substitute parts use the 8-SOIC package with identical pin configuration, SPI interface, and external reference architecture. Mechanical and electrical pin compatibility is maintained across all listed substitutes.

Q: Which substitute is best for new designs?

A: MAX543ACSA+ is recommended for designs requiring the original 0°C ~ 70°C operating range. For new designs without temperature constraints, LTC8043ES8#PBF or LTC8043ES8#TRPBF provide extended -40°C ~ 85°C operation with ±0.5 LSB accuracy and ROHS3 compliance. DAC8043 series offers cost-effective alternatives with ±1 LSB accuracy across the extended temperature range.

Q: What packaging format should be selected for production?

A: Tube packaging (standard format) is suitable for lower-volume applications. Tape & Reel format (TRPBF or -REEL7 designations) is specified for high-volume automated assembly. Both formats maintain identical electrical specifications.

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