DAC8043U/2K5 Equivalent & Substitute Parts

Part Overview

The DAC8043U/2K5 is a 12-bit digital-to-analog converter manufactured by Texas Instruments, housed in an 8-SOIC surface mount package. This multiplying DAC features current output (unbuffered), SPI data interface, and external reference capability. The part is active in production status with 4100 units in stock. Substitute parts are necessary to address supply constraints, packaging preferences, or specific performance requirements while maintaining functional compatibility within the same electrical and mechanical specifications.

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
Voltage - Supply, Digital	5V
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 eligibility for the DAC8043U/2K5 is determined by the following critical parameters:

12-bit resolution
Single D/A converter configuration
1µs settling time
Current output (unbuffered) topology
SPI serial interface
External reference input
5V analog and digital supply voltages
8-SOIC package footprint (0.154", 3.90mm width)
Surface mount technology
Operating temperature range -40°C to 85°C
ROHS3 compliance

All qualified substitutes maintain these core electrical and mechanical specifications. Variations in INL/DNL performance, internal architecture (multiplying vs. R-2R), packaging format (tube vs. tape & reel), and moisture sensitivity level do not preclude substitution when the above parameters are met.

Parameter Comparison

Parameter	DAC8043U/2K5	LTC8043FS8#PBF	DAC8043AESZ	DAC8043AFSZ	DAC8043AFSZ-REEL7	LTC8043ES8#PBF
Manufacturer	Texas Instruments	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.
Resolution (Bits)	12	12	12	12	12	12
Number of D/A Converters	1	1	1	1	1	1
Settling Time	1µs	1µs	1µs	1µs	1µs	1µs
Output Type	Current - Unbuffered	Current - Unbuffered	Current - Unbuffered	Current - Unbuffered	Current - Unbuffered	Current - Unbuffered
Data Interface	SPI	SPI	SPI	SPI	SPI	SPI
Reference Type	External	External	External	External	External	External
Voltage - Supply, Analog	5V	5V	5V	5V	5V	5V
Voltage - Supply, Digital	5V	5V	5V	5V	5V	5V
INL/DNL (LSB)	±1 / ±1	±1 / ±1	±0.5 / ±0.5	±1 / ±1	±1 / ±1	±0.5 / ±0.5
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Packaging Format	Not specified	Tube	Tube	Tube	Tape & Reel (TR)	Tube
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

All listed substitute parts maintain active production status and ROHS3 compliance, ensuring regulatory alignment with the DAC8043U/2K5. Selection among qualified substitutes should be based on the following factors:

Packaging Format: DAC8043AFSZ-REEL7 is supplied in tape & reel format, suitable for high-volume automated assembly. DAC8043AESZ, DAC8043AFSZ, LTC8043FS8#PBF, and LTC8043ES8#PBF are supplied in tube format, appropriate for lower-volume or manual assembly operations.

Performance Grade: DAC8043AESZ and LTC8043ES8#PBF offer improved INL/DNL specifications (±0.5 LSB maximum) compared to the original part (±1 LSB maximum). These grades are suitable for applications requiring tighter linearity tolerances.

Moisture Sensitivity: The original DAC8043U/2K5 carries MSL 3 (168-hour floor life). All substitute parts carry MSL 1 (unlimited floor life), providing superior moisture handling characteristics and extended shelf life without bake-out requirements.

Manufacturer Availability: Analog Devices Inc. substitutes provide alternative sourcing from a second manufacturer, reducing single-source supply risk while maintaining functional equivalence.

Frequently Asked Questions (FAQ)

Q: Can DAC8043AESZ replace DAC8043U/2K5 directly on the PCB?

A: Yes. Both parts use the 8-SOIC package with identical pinout and electrical specifications. The improved INL/DNL performance of DAC8043AESZ (±0.5 LSB vs. ±1 LSB) is backward compatible and does not require circuit modifications.

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

A: Tube packaging contains individual parts in a plastic tube, suitable for manual handling and lower-volume assembly. Tape & reel packaging (DAC8043AFSZ-REEL7) contains parts on a continuous carrier tape wound on a reel, optimized for automated pick-and-place assembly equipment. Both formats contain identical parts; packaging selection depends on assembly process requirements.

Q: Does the lower MSL rating of substitute parts affect compatibility?

A: No. MSL 1 (unlimited floor life) is superior to MSL 3 (168-hour floor life). Substitute parts with MSL 1 can be stored indefinitely without moisture bake-out, providing operational advantages over the original part.

Q: Are LTC8043 parts (Analog Devices) functionally equivalent to DAC8043 parts (Texas Instruments)?

A: Yes, within the specified parameters. Both LTC8043FS8#PBF and LTC8043ES8#PBF meet all core electrical and mechanical requirements: 12-bit resolution, 1µs settling time, SPI interface, 5V supply, 8-SOIC package, and -40°C to 85°C operating range. Internal architecture differences (R-2R vs. multiplying) do not affect functional substitution when these parameters are met.

Q: Can I use DAC8043AESZ if my application requires ±1 LSB accuracy?

A: Yes. DAC8043AESZ guarantees ±0.5 LSB INL/DNL, which exceeds the ±1 LSB requirement. Superior performance specifications are always acceptable in substitution scenarios.

Q: What is the inventory status of substitute parts?

A: LTC8043FS8#PBF: 1697 units; DAC8043AESZ: 1154 units; DAC8043AFSZ: 1724 units; DAC8043AFSZ-REEL7: 1955 units; LTC8043ES8#PBF: 2204 units. All parts are new original stock.

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