MX7224KCWN 8-Bit Digital to Analog Converter Equivalent & Substitute Parts

Part Overview

The MX7224KCWN is an 8-bit digital to analog converter (DAC) manufactured by Analog Devices Inc./Maxim Integrated, designed for data acquisition applications requiring voltage output conversion. This component features an R-2R architecture with external reference capability and parallel data interface. The MX7224KCWN is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing system support and new design implementations. Active alternatives from the same manufacturer family provide direct functional replacement with improved product status and compliance certifications.

Key Parameters

Parameter	Value
Number of Bits	8
Number of D/A Converters	1
Output Type	Voltage - Buffered
Data Interface	Parallel
Reference Type	External
Architecture	R-2R
Settling Time	8µs
INL/DNL (LSB)	±1 (Max) / ±1 (Max)
Package / Case	18-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
Operating Temperature	0°C ~ 70°C

Substitute Part Grouping Explanation

Substitution of the MX7224KCWN is determined by strict equivalence across the following critical parameters: resolution (8 bits), converter count (1), output configuration (voltage-buffered), data interface (parallel), reference type (external), and package form factor (18-SOIC surface mount). All substitute parts maintain identical electrical specifications for INL/DNL performance, architecture, and pin compatibility.

The substitute parts are categorized as follows:

Direct Manufacturer Equivalents (Maxim Integrated): MX7224KCWN+ and MX7224KEWN+ represent active production variants of the base MX7224 family with identical electrical performance and package specifications. These parts differ only in packaging format (tube) and RoHS compliance status.

Manufacturer Recommended Cross-Reference (Analog Devices): AD7224KRZ-18 and AD7224KRZ-18REEL are functionally equivalent parts from Analog Devices Inc., the parent company of Maxim Integrated. These parts maintain core electrical parameters but operate across an extended temperature range (-40°C to 85°C versus 0°C to 70°C) and feature a longer settling time specification (20µs versus 8µs).

Parameter Comparison

Parameter	MX7224KCWN	MX7224KCWN+	MX7224KEWN+	AD7224KRZ-18	AD7224KRZ-18REEL
Manufacturer	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated	Analog Devices Inc.	Analog Devices Inc.
Product Status	Obsolete	Active	Active	Active	Active
Number of Bits	8	8	8	8	8
Number of D/A Converters	1	1	1	1	1
Settling Time	8µs	8µs	8µs	20µs	20µs
Output Type	Voltage - Buffered	Voltage - Buffered	Voltage - Buffered	Voltage - Buffered	Voltage - Buffered
Differential Output	No	No	No	No	No
Data Interface	Parallel	Parallel	Parallel	Parallel	Parallel
Reference Type	External	External	External	External	External
Voltage - Supply, Analog	11.4V ~ 16.5V, -5V	11.4V ~ 16.5V, -5V	11.4V ~ 16.5V, -5V	11.4V ~ 16.5V, ±5V	11.4V ~ 16.5V, ±5V
Voltage - Supply, Digital	14.25V ~ 15.75V	14.25V ~ 15.75V	14.25V ~ 15.75V	14.25V ~ 15.75V	14.25V ~ 15.75V
INL/DNL (LSB)	±1 (Max) / ±1 (Max)	±1 (Max) / ±1 (Max)	±1 (Max) / ±1 (Max)	±1 (Max) / ±1 (Max)	±1 (Max) / ±1 (Max)
Architecture	R-2R	R-2R	R-2R	R-2R	R-2R
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	18-SOIC (0.295", 7.50mm Width)	18-SOIC (0.295", 7.50mm Width)	18-SOIC (0.295", 7.50mm Width)	18-SOIC (0.295", 7.50mm Width)	18-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

For Direct Replacement with Active Product Status: MX7224KCWN+ and MX7224KEWN+ are the primary substitutes for the obsolete MX7224KCWN. Both parts maintain identical electrical performance, temperature operating range, and settling time specifications. MX7224KCWN+ is available in tube packaging with 2100 units in stock, while MX7224KEWN+ is also tube-packaged with 1161 units in stock. Both achieve ROHS3 compliance, addressing regulatory requirements not met by the original part.

For Extended Temperature Range Applications: AD7224KRZ-18 and AD7224KRZ-18REEL extend the operating temperature range to -40°C to 85°C, accommodating industrial and automotive environments beyond the original 0°C to 70°C specification. The settling time increases to 20µs, which may impact applications requiring the original 8µs response. AD7224KRZ-18 is tube-packaged with 1454 units in stock, while AD7224KRZ-18REEL is tape and reel packaged with 5300 units in stock. Both achieve ROHS3 compliance.

Packaging Considerations: All substitute parts maintain the 18-SOIC surface mount package form factor with identical pin configuration and PCB footprint compatibility. Selection between tube and tape & reel packaging depends on production volume and assembly process requirements.

Frequently Asked Questions (FAQ)

Q: Can MX7224KCWN+ directly replace MX7224KCWN in existing designs?

A: Yes. MX7224KCWN+ is a direct functional equivalent with identical electrical specifications, operating temperature range (0°C to 70°C), settling time (8µs), and 18-SOIC package form factor. The primary difference is active product status and ROHS3 compliance. Pin-for-pin compatibility is maintained.

Q: What is the difference between MX7224KCWN+ and MX7224KEWN+?

A: Both parts are parametrically equivalent with identical electrical performance, temperature range, and package specifications. The difference lies in the part number designation (C versus E suffix), which reflects internal Maxim Integrated product line categorization. Both are active products with ROHS3 compliance.

Q: When should AD7224KRZ-18 be selected over MX7224KCWN+?

A: AD7224KRZ-18 is selected when applications require extended operating temperature range (-40°C to 85°C) for industrial, automotive, or harsh environment deployment. The trade-off is increased settling time (20µs versus 8µs). For standard 0°C to 70°C applications, MX7224KCWN+ is the preferred substitute.

Q: Are AD7224KRZ-18 and AD7224KRZ-18REEL electrically identical?

A: Yes. Both parts are electrically identical with the same specifications. The difference is packaging format: AD7224KRZ-18 is tube-packaged for lower-volume applications, while AD7224KRZ-18REEL is tape and reel packaged for high-volume automated assembly.

Q: Does the obsolete status of MX7224KCWN affect design compatibility with substitute parts?

A: No. The obsolete status indicates end-of-life for the original part, making substitution necessary for new production. All recommended substitutes maintain full electrical and mechanical compatibility, ensuring seamless integration into existing designs without circuit modification.

Q: What is the significance of ROHS3 compliance in the substitute parts?

A: ROHS3 compliance indicates conformance to Restriction of Hazardous Substances regulations, eliminating lead and other restricted materials. The original MX7224KCWN is RoHS non-compliant. All substitute parts achieve ROHS3 compliance, meeting regulatory requirements for commercial and industrial applications.

Q: Can MX7224KCWN be used interchangeably with AD7224KRZ-18 in high-speed applications?

A: No. The settling time difference (8µs versus 20µs) makes AD7224KRZ-18 unsuitable for applications requiring the original 8µs response time. MX7224KCWN+ maintains the 8µs settling time and is the appropriate substitute for speed-critical designs.

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