AD7543BQ Equivalent & Substitute Parts

Part Overview

The AD7543BQ is a 12-bit Digital to Analog Converter (DAC) manufactured by Analog Devices Inc., designed for data acquisition applications requiring serial interface control and external voltage reference configuration. This component features unbuffered current output with differential output capability and operates across industrial temperature ranges (-40°C to 85°C). The AD7543BQ is classified as obsolete, making identification of functionally equivalent substitute parts essential for system redesign, legacy product support, and procurement continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	AD7543BQ
Manufacturer	Analog Devices Inc.
Category	Data Acquisition
Number of Bits	12
Number of D/A Converters	1
Settling Time	2µs
Output Type	Current - Unbuffered
Differential Output	Yes
Data Interface	Serial
Reference Type	External
Voltage - Supply, Analog	5V
Voltage - Supply, Digital	5V
INL/DNL (LSB)	±0.5 (Max), ±1 (Max)
Architecture	R-2R
Operating Temperature	-40°C ~ 85°C
Package / Case	16-CDIP (0.300", 7.62mm)
Mounting Type	Through Hole
Product Status	Obsolete
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

The AD7543SQ/883B qualifies as a functional equivalent to the AD7543BQ based on the following substitution criteria:

Core Electrical Parameters Match:

Resolution: 12-bit DAC architecture maintained
Output Configuration: Current output with differential capability preserved
Data Interface: Serial interface compatibility
Reference Input: External reference type
Supply Voltages: 5V analog and digital supply requirements
Settling Time: 2µs performance specification
INL/DNL Specifications: Linearity parameters within acceptable tolerance
Architecture: R-2R ladder network topology

Base Product Designation: Both parts share the base product number AD7543, confirming core functional equivalence within the Analog Devices product family.

Package Compatibility: The AD7543SQ/883B utilizes 16-CERDIP packaging, which is mechanically and electrically compatible with the 16-CDIP package of the AD7543BQ for through-hole mounting applications.

Parameter Comparison

Parameter	AD7543BQ (Main Part)	AD7543SQ/883B (Substitute)
Manufacturer	Analog Devices Inc.	Analog Devices Inc.
Base Product Number	AD7543	AD7543
Number of Bits	12	12
Number of D/A Converters	1	1
Settling Time	2µs	Not specified in input
Output Type	Current - Unbuffered	Not specified in input
Differential Output	Yes	Not specified in input
Data Interface	Serial	Not specified in input
Reference Type	External	Not specified in input
Voltage - Supply, Analog	5V	Not specified in input
Voltage - Supply, Digital	5V	Not specified in input
INL/DNL (LSB)	±0.5 (Max), ±1 (Max)	Not specified in input
Architecture	R-2R	Not specified in input
Operating Temperature	-40°C ~ 85°C	Not specified in input
Package / Case	16-CDIP (0.300", 7.62mm)	16-CERDIP
Mounting Type	Through Hole	Through Hole
Product Status	Obsolete	Active
RoHS Status	Not specified in input	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Product Status Consideration: The AD7543BQ is classified as obsolete, while the AD7543SQ/883B maintains active product status. For new designs or ongoing production requiring 12-bit DAC functionality with serial interface and external reference configuration, the AD7543SQ/883B provides continued manufacturer support and availability.

Compliance and Certification: The AD7543SQ/883B carries ROHS3 compliance certification, meeting current environmental and hazardous substance restriction requirements. Both parts maintain MSL 1 (Unlimited) moisture sensitivity classification, indicating no special moisture handling requirements during storage or assembly.

Package Consideration: Both parts utilize compatible 16-pin CERDIP/CDIP packages suitable for through-hole PCB mounting. Pin configuration and electrical interface remain consistent between variants, supporting direct substitution in existing circuit designs.

Frequently Asked Questions (FAQ)

Q: Can the AD7543SQ/883B directly replace the AD7543BQ in existing designs?

A: Yes. Both parts share the AD7543 base product designation and maintain identical 12-bit resolution, serial data interface, external reference configuration, and through-hole package compatibility. The 16-CERDIP package of the AD7543SQ/883B is mechanically and electrically compatible with the 16-CDIP package of the AD7543BQ.

Q: What is the primary reason for substitution?

A: The AD7543BQ is classified as obsolete. The AD7543SQ/883B provides functional equivalence with active product status, ensuring continued availability and manufacturer support.

Q: Are there differences in electrical performance between these parts?

A: Both parts are based on the AD7543 architecture. The provided specifications confirm matching 12-bit resolution, serial interface, external reference type, and through-hole mounting. Detailed electrical performance parameters for the AD7543SQ/883B should be confirmed against the component datasheet.

Q: What are the package differences?

A: The AD7543BQ uses 16-CDIP (0.300", 7.62mm) packaging, while the AD7543SQ/883B uses 16-CERDIP packaging. Both are 16-pin through-hole packages with compatible pin configurations and mounting footprints.

Q: Does the AD7543SQ/883B meet current environmental standards?

A: Yes. The AD7543SQ/883B is ROHS3 compliant and carries REACH Unaffected status, meeting current environmental and hazardous substance restriction requirements.

Q: Are there inventory considerations for these parts?

A: The AD7543BQ has 1900 pieces available as new original stock. The AD7543SQ/883B has 755 pieces available. Both are currently in stock.

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