DAC8043UG4 Equivalent & Substitute Parts

Part Overview

The DAC8043UG4 is a 12-bit digital-to-analog converter manufactured by Texas Instruments, designed for data acquisition applications requiring current output in an 8-SOIC surface mount package. This part is discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing production and maintenance applications. The DAC8043UG4 operates with 5V analog and digital supply voltages, features SPI data interface, and external reference capability with 1µs settling time.

Key Parameters

Parameter	Value
Resolution (Bits)	12
Number of D/A Converters	1
Output Type	Current - Unbuffered
Data Interface	SPI
Reference Type	External
Voltage - Supply, Analog	5V
Voltage - Supply, Digital	5V
Settling Time	1µs
INL/DNL (LSB)	±1 (Max), ±1 (Max)
Operating Temperature Range	-40°C ~ 85°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the DAC8043UG4 is determined by strict equivalence across the following critical parameters: 12-bit resolution, single D/A converter, current output (unbuffered), SPI interface, external reference, 5V dual supply operation, 1µs settling time, and 8-SOIC package. All substitute parts listed maintain these core electrical and mechanical specifications, ensuring functional compatibility in existing circuit designs.

The substitute parts are grouped into two categories based on manufacturer and product status:

Texas Instruments Direct Substitutes: DAC8043U maintains identical specifications with active product status and tube packaging.

Analog Devices Inc. Equivalents: DAC8043A1FSZ, DAC8043AESZ, DAC8043AFSZ, DAC8043AFSZ-REEL7, LTC8043FS8#PBF, and LTC8043ES8#PBF provide functional equivalence with R-2R architecture and active product status. These parts differ in packaging format (tube or tape & reel) and moisture sensitivity level (MSL 1 vs. MSL 3).

Parameter Comparison

Part Number	Manufacturer	Resolution (Bits)	Output Type	Data Interface	Settling Time	INL/DNL (LSB)	Package	Product Status	Packaging Format	MSL
DAC8043UG4	Texas Instruments	12	Current - Unbuffered	SPI	1µs	±1, ±1	8-SOIC	Discontinued	-	3
DAC8043U	Texas Instruments	12	Current - Unbuffered	SPI	1µs	±1, ±1	8-SOIC	Active	Tube	3
DAC8043A1FSZ	Analog Devices Inc.	12	Current - Unbuffered	SPI	1µs	±1, ±1	8-SOIC	Active	Tube	1
DAC8043AESZ	Analog Devices Inc.	12	Current - Unbuffered	SPI	1µs	±0.5, ±0.5	8-SOIC	Active	Tube	1
DAC8043AFSZ	Analog Devices Inc.	12	Current - Unbuffered	SPI	1µs	±1, ±1	8-SOIC	Active	Tube	1
DAC8043AFSZ-REEL7	Analog Devices Inc.	12	Current - Unbuffered	SPI	1µs	±1, ±1	8-SOIC	Active	Tape & Reel	1
LTC8043FS8#PBF	Analog Devices Inc.	12	Current - Unbuffered	SPI	1µs	±1, ±1	8-SOIC	Active	Tube	1
LTC8043ES8#PBF	Analog Devices Inc.	12	Current - Unbuffered	SPI	1µs	±0.5, ±0.5	8-SOIC	Active	Tube	1

Engineering Selection Recommendations

For applications requiring direct replacement of the discontinued DAC8043UG4, DAC8043U from Texas Instruments provides the most direct path with identical specifications and active product status. This part maintains the same manufacturer lineage and electrical characteristics.

For long-term supply chain stability, Analog Devices Inc. equivalents (DAC8043A1FSZ, DAC8043AFSZ, DAC8043AFSZ-REEL7, LTC8043FS8#PBF) are active products with established inventory levels. These parts meet all functional requirements with improved moisture sensitivity levels (MSL 1 vs. MSL 3), reducing reflow process constraints.

DAC8043AESZ and LTC8043ES8#PBF offer enhanced linearity performance (±0.5 LSB INL/DNL vs. ±1 LSB) for applications requiring tighter accuracy specifications. These parts are suitable for direct substitution where improved performance margins are beneficial.

Packaging format selection depends on production volume: tube packaging for lower volumes, tape & reel (DAC8043AFSZ-REEL7) for high-volume automated assembly.

All substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory compatibility with the original design.

Frequently Asked Questions (FAQ)

Q: Can DAC8043U directly replace DAC8043UG4 in existing designs?

A: Yes. DAC8043U maintains identical electrical specifications (12-bit resolution, 1µs settling time, ±1 LSB INL/DNL, 5V dual supply, SPI interface, current output) and 8-SOIC package. The primary difference is active product status and tube packaging format.

Q: What is the difference between DAC8043AFSZ and LTC8043FS8#PBF?

A: Both parts provide 12-bit DAC functionality with identical electrical performance (1µs settling time, ±1 LSB INL/DNL, SPI interface). The primary difference is manufacturer: DAC8043AFSZ is Analog Devices Inc. DAC series, while LTC8043FS8#PBF is Analog Devices Inc. LTC series. Both are functionally equivalent for this application.

Q: Why do some substitute parts have better INL/DNL specifications (±0.5 LSB)?

A: DAC8043AESZ and LTC8043ES8#PBF are higher-grade variants within the same product family, offering tighter linearity specifications. These parts are direct substitutes for applications requiring enhanced accuracy but maintain all other electrical and mechanical compatibility.

Q: Does moisture sensitivity level (MSL) affect substitution compatibility?

A: MSL rating affects reflow process requirements and storage conditions, not functional compatibility. The original DAC8043UG4 has MSL 3 (168 hours), while Analog Devices equivalents have MSL 1 (unlimited). Lower MSL ratings provide more flexible manufacturing and storage conditions.

Q: What is the difference between tube and tape & Reel packaging?

A: Tube packaging is suitable for manual assembly and lower-volume production. Tape & Reel (DAC8043AFSZ-REEL7) is optimized for automated pick-and-place assembly in high-volume manufacturing. Electrical performance is identical; packaging format selection depends on production methodology.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory compatibility with the original DAC8043UG4 design.

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