MAX544BCSA+ Equivalent & Substitute Parts

Part Overview

The MAX544BCSA+ is a 14-bit digital-to-analog converter (DAC) manufactured by Analog Devices Inc./Maxim Integrated, designed for data acquisition applications requiring voltage output conversion. This surface-mount component operates with 5V analog and digital supply voltages and features an R-2R architecture with SPI data interface. The part is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Substitute parts are identified when design requirements change, inventory constraints occur, or extended operating temperature ranges become necessary for system-level applications.

Key Parameters

Parameter	Value
Number of Bits	14
Number of D/A Converters	1
Settling Time	1µs (Typ)
Output Type	Voltage - Unbuffered
Data Interface	SPI
Reference Type	External
Architecture	R-2R
INL/DNL	±0.15 LSB
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 MAX544BCSA+ is determined by the following critical parameters:

Resolution: 14-bit conversion capability
Output Configuration: Voltage-mode, unbuffered output
Interface Protocol: SPI serial data interface
Package Compatibility: 8-SOIC form factor with identical pin pitch and thermal characteristics
Electrical Performance: Settling time of 1µs (typical) and INL/DNL specification of ±0.15 LSB
Architecture: R-2R resistor ladder topology
Compliance: ROHS3 certification and MSL 1 rating

Substitute parts maintain these core specifications while potentially offering extended operating temperature ranges or alternative packaging formats (tube versus reel).

Parameter Comparison

Parameter	MAX544BCSA+	MAX544ACSA+	AD5551BRZ	AD5551BRZ-REEL7
Manufacturer	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated	Analog Devices Inc.	Analog Devices Inc.
Number of Bits	14	14	14	14
Number of D/A Converters	1	1	1	1
Settling Time	1µs (Typ)	1µs (Typ)	1µs (Typ)	1µs (Typ)
Output Type	Voltage - Unbuffered	Voltage - Unbuffered	Voltage - Unbuffered	Voltage - Unbuffered
Data Interface	SPI	SPI	SPI	SPI
Reference Type	External	External	External	External
Voltage - Supply, Analog	5V	5V	2.7V ~ 5.5V	2.7V ~ 5.5V
Voltage - Supply, Digital	5V	5V	2.7V ~ 5.5V	2.7V ~ 5.5V
INL/DNL (LSB)	±0.15, ±0.15	±0.15, ±0.15	±0.15, ±0.15	±0.15, ±0.15
Architecture	R-2R	R-2R	R-2R	R-2R
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Packaging Format	Tube	Tube	Tube	Cut Tape (CT) & Digi-Reel®
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

MAX544ACSA+ serves as a parametric equivalent to MAX544BCSA+, maintaining identical electrical specifications, package geometry, and operating temperature range (0°C ~ 70°C). Both parts are manufactured by Analog Devices Inc./Maxim Integrated and carry ROHS3 compliance. Selection between these two MAX544 variants depends on inventory availability and procurement lead times, as functional performance is equivalent.

AD5551BRZ and AD5551BRZ-REEL7 are manufacturer-recommended alternatives that extend the operating temperature range to -40°C ~ 85°C and support wider supply voltage ranges (2.7V ~ 5.5V for both analog and digital supplies). These parts maintain identical resolution, settling time, INL/DNL performance, and R-2R architecture. The primary distinction between AD5551BRZ and AD5551BRZ-REEL7 is packaging format: tube versus cut tape with Digi-Reel® configuration. Selection of AD5551 variants is appropriate when applications require extended temperature operation or reduced supply voltage capability.

All substitute parts maintain ROHS3 compliance, MSL 1 rating, and identical 8-SOIC package dimensions, ensuring direct PCB layout compatibility without redesign.

Frequently Asked Questions (FAQ)

Q: Can MAX544ACSA+ be used as a direct replacement for MAX544BCSA+?

A: Yes. MAX544ACSA+ is a parametric equivalent with identical electrical specifications, package form factor, and operating temperature range. Both parts are pin-compatible and functionally interchangeable in 5V supply applications.

Q: What is the primary advantage of AD5551BRZ over MAX544BCSA+?

A: AD5551BRZ extends the operating temperature range from 0°C ~ 70°C to -40°C ~ 85°C and supports supply voltages from 2.7V to 5.5V, compared to fixed 5V supplies on MAX544BCSA+. All other electrical parameters remain equivalent.

Q: Are AD5551BRZ and AD5551BRZ-REEL7 electrically identical?

A: Yes. Both parts are electrically identical 14-bit DACs with identical performance specifications. The difference is packaging format: AD5551BRZ is supplied in tube packaging, while AD5551BRZ-REEL7 uses cut tape with Digi-Reel® format for automated assembly processes.

Q: Is the 8-SOIC package identical across all four parts?

A: Yes. All parts use 8-SOIC (0.154", 3.90mm width) surface-mount packaging with identical pin pitch and thermal characteristics, enabling direct PCB layout compatibility.

Q: Do all substitute parts maintain ROHS3 compliance?

A: Yes. MAX544BCSA+, MAX544ACSA+, AD5551BRZ, and AD5551BRZ-REEL7 are all ROHS3 compliant with MSL 1 (unlimited) moisture sensitivity rating.

Q: Which part should be selected for industrial temperature applications?

A: AD5551BRZ or AD5551BRZ-REEL7 are appropriate for applications requiring operation below 0°C or above 70°C, as both support -40°C ~ 85°C operating range. MAX544BCSA+ and MAX544ACSA+ are limited to 0°C ~ 70°C.

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