MAX543AESA Equivalent & Substitute Parts

Part Overview

The MAX543AESA is a 12-bit digital-to-analog converter (DAC) manufactured by Analog Devices Inc./Maxim Integrated, housed in an 8-SOIC surface mount package. This component features SPI data interface, external voltage reference capability, and R-2R architecture for precision analog output generation. The MAX543AESA is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. Active alternatives from Analog Devices provide direct functional replacement with improved compliance status.

Key Parameters

Parameter	Value
Resolution	12 Bit
Number of D/A Converters	1
Settling Time	1µs
Output Type	Current - Unbuffered
Data Interface	SPI
Reference Type	External
Voltage - Supply, Analog	5V, 11.4V ~ 15.75V
Voltage - Supply, Digital	5V, 11.4V ~ 15.75V
INL/DNL (LSB)	±0.5 (Max), ±0.5 (Max)
Architecture	R-2R
Operating Temperature	-40°C ~ 85°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the MAX543AESA is determined by strict equivalence across the following critical parameters: 12-bit resolution, single D/A converter, 1µs settling time, current-unbuffered output, SPI interface, external reference type, 5V supply capability, R-2R architecture, 8-SOIC package, and -40°C to 85°C operating temperature range.

Substitute parts are grouped into two categories based on electrical performance specifications:

Group 1: Precision Grade (INL/DNL ±0.5 LSB Max)

MAX543AESA+ (direct packaging variant, active status)
LTC8043ES8#PBF (tube packaging)
LTC8043ES8#TRPBF (tape & reel packaging)

Group 2: Standard Grade (INL/DNL ±1 LSB Max)

DAC8043A1FSZ (tube packaging)
DAC8043AFSZ (tube packaging)
DAC8043AFSZ-REEL7 (tape & reel packaging)
LTC8043FS8#PBF (tube packaging)
LTC8043FS8#TRPBF (tape & reel packaging)

All substitute parts maintain identical package geometry, pin configuration, interface protocol, and thermal operating range. Differences in INL/DNL specifications and supply voltage ranges are noted in the parameter comparison table.

Parameter Comparison

Part Number	Manufacturer	Product Status	Resolution (Bit)	Settling Time (µs)	INL/DNL (LSB)	Voltage - Supply, Analog	Voltage - Supply, Digital	Package	RoHS Status	Inventory (Pcs)
MAX543AESA	Analog Devices Inc./Maxim Integrated	Obsolete	12	1	±0.5, ±0.5	5V, 11.4V ~ 15.75V	5V, 11.4V ~ 15.75V	8-SOIC	RoHS non-compliant	1104
MAX543AESA+	Analog Devices Inc./Maxim Integrated	Active	12	1	±0.5, ±0.5	5V, 11.4V ~ 15.75V	5V, 11.4V ~ 15.75V	8-SOIC	ROHS3 Compliant	879
DAC8043A1FSZ	Analog Devices Inc.	Active	12	1	±1, ±1	5V	5V	8-SOIC	ROHS3 Compliant	1819
DAC8043AFSZ	Analog Devices Inc.	Active	12	1	±1, ±1	5V	5V	8-SOIC	ROHS3 Compliant	1724
DAC8043AFSZ-REEL7	Analog Devices Inc.	Active	12	1	±1, ±1	5V	5V	8-SOIC	ROHS3 Compliant	1955
LTC8043ES8#PBF	Analog Devices Inc.	Active	12	1	±0.5, ±0.5	5V	5V	8-SOIC	ROHS3 Compliant	2204
LTC8043ES8#TRPBF	Analog Devices Inc.	Active	12	1	±0.5, ±0.5	5V	5V	8-SOIC	ROHS3 Compliant	3100
LTC8043FS8#PBF	Analog Devices Inc.	Active	12	1	±1, ±1	5V	5V	8-SOIC	ROHS3 Compliant	1697
LTC8043FS8#TRPBF	Analog Devices Inc.	Active	12	1	±1, ±1	5V	5V	8-SOIC	ROHS3 Compliant	2900

Engineering Selection Recommendations

For Precision Applications (INL/DNL ±0.5 LSB Required):

MAX543AESA+ is the direct successor to the obsolete MAX543AESA, maintaining identical electrical specifications while achieving ROHS3 compliance. This part is recommended as the primary replacement for designs requiring precision-grade linearity performance. LTC8043ES8#PBF and LTC8043ES8#TRPBF provide equivalent precision-grade performance from the LTC8043 product line, with higher inventory availability (2204 and 3100 units respectively).

For Standard Applications (INL/DNL ±1 LSB Acceptable):

DAC8043A1FSZ, DAC8043AFSZ, and LTC8043FS8#PBF variants offer active product status with ROHS3 compliance and higher inventory levels. These parts are suitable for applications where the relaxed linearity specification does not impact system performance. The DAC8043AFSZ-REEL7 and LTC8043FS8#TRPBF variants provide tape & reel packaging for high-volume production environments.

Supply Voltage Consideration:

The original MAX543AESA supports dual supply voltage ranges (5V and 11.4V ~ 15.75V). All substitute parts maintain 5V supply capability. Designs requiring the extended 11.4V ~ 15.75V range should prioritize MAX543AESA+ to preserve full voltage flexibility.

Compliance Status:

All active substitute parts achieve ROHS3 compliance, addressing regulatory requirements that the obsolete MAX543AESA does not meet. This compliance status is mandatory for new designs and production continuity in regulated markets.

Frequently Asked Questions (FAQ)

Q: Can I directly replace MAX543AESA with MAX543AESA+ without circuit modification?

A: Yes. MAX543AESA+ is electrically and mechanically identical to MAX543AESA, with identical pin configuration, package dimensions (8-SOIC), and electrical specifications (12-bit resolution, 1µs settling time, ±0.5 LSB INL/DNL). The primary difference is active product status and ROHS3 compliance.

Q: What is the difference between precision-grade (±0.5 LSB) and standard-grade (±1 LSB) parts?

A: INL/DNL specifications define integral and differential nonlinearity limits. Precision-grade parts (MAX543AESA+, LTC8043ES8 variants) maintain tighter linearity tolerances suitable for high-resolution analog applications. Standard-grade parts (DAC8043A1FSZ, LTC8043FS8 variants) have relaxed tolerances acceptable for general-purpose data acquisition. Selection depends on application accuracy requirements.

Q: Are tube and tape & reel packaging variants functionally equivalent?

A: Yes. Tube packaging (suffix #PBF) and tape & reel packaging (suffix #TRPBF or -REEL7) contain identical die and electrical performance. Packaging selection is driven by production volume and assembly automation requirements. Tape & reel variants are standard for high-volume manufacturing; tube packaging is typical for lower volumes or manual assembly.

Q: Why do some substitute parts specify only 5V supply while the original supports 11.4V ~ 15.75V?

A: The DAC8043 and LTC8043 product lines have different supply voltage specifications than the MAX543 line. Designs requiring extended supply voltage range (11.4V ~ 15.75V) must use MAX543AESA+ to maintain full voltage flexibility. Standard 5V supply applications can use any substitute part.

Q: Is the LTC8043 product line (Linear Technology) compatible with MAX543 designs?

A: Yes. LTC8043ES8 and LTC8043FS8 variants are functionally compatible with MAX543AESA across all critical parameters: 12-bit resolution, 1µs settling time, SPI interface, external reference, R-2R architecture, and 8-SOIC package. Both product lines are now part of Analog Devices Inc. following the Linear Technology acquisition.

Q: What inventory levels should I consider for production planning?

A: Current inventory for active parts ranges from 1697 to 3100 units. LTC8043ES8#TRPBF offers the highest availability (3100 units) for precision-grade applications. DAC8043AFSZ-REEL7 provides 1955 units in tape & reel format for high-volume production. Inventory levels should be confirmed with your supplier for long-term production commitments.

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