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AD7225CRSZ Equivalent & Substitute Parts
Part Overview
The AD7225CRSZ is an 8-bit digital-to-analog converter (DAC) with 4 independent channels, designed for data acquisition applications requiring voltage output buffering. Manufactured by Analog Devices Inc., this component features an R-2R architecture and parallel data interface with external reference capability. The part is currently classified as obsolete, making equivalent substitute parts necessary for ongoing system support and new design implementations. Active alternatives from the MAX505 series provide functional equivalence with enhanced availability and compliance certifications.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Number of Bits | 8 |
| Number of D/A Converters | 4 |
| Output Type | Voltage - Buffered |
| Data Interface | Parallel |
| Reference Type | External |
| Architecture | R-2R |
| Package / Case | 24-SSOP (0.209", 5.30mm Width) |
| Mounting Type | Surface Mount |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution of the AD7225CRSZ is determined by strict equivalence across the following core parameters:
- Resolution & Channel Count: All substitute parts maintain 8-bit resolution with 4 independent DAC channels
- Output Configuration: Voltage-buffered output with external reference requirement
- Interface Architecture: Parallel data interface with R-2R converter architecture
- Package Compatibility: 24-SSOP surface mount package with identical 5.30mm width
- Electrical Characteristics: INL/DNL specifications, settling time, and supply voltage ranges
The MAX505 series (MAX505ACAG+, MAX505ACAG+T, MAX505AEAG+, MAX505BCAG+, MAX505BCAG+T, MAX505BEAG+, MAX505BEAG+T) provides full functional substitution. Differences exist in operating temperature ranges, supply voltage specifications, and packaging formats (Tube vs. Tape & Reel), which determine suitability for specific applications.
Parameter Comparison
| Parameter | AD7225CRSZ | MAX505ACAG+ | MAX505ACAG+T | MAX505AEAG+ | MAX505BCAG+ | MAX505BCAG+T | MAX505BEAG+ | MAX505BEAG+T |
|---|---|---|---|---|---|---|---|---|
| Number of Bits | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 |
| Number of D/A Converters | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| Settling Time | 4µs | 6µs (Typ) | 6µs (Typ) | 6µs (Typ) | 6µs (Typ) | 6µs (Typ) | 6µs (Typ) | 6µs (Typ) |
| Output Type | Voltage - Buffered | Voltage - Buffered | Voltage - Buffered | Voltage - Buffered | Voltage - Buffered | Voltage - Buffered | Voltage - Buffered | Voltage - Buffered |
| Data Interface | Parallel | Parallel | Parallel | Parallel | Parallel | Parallel | Parallel | Parallel |
| Reference Type | External | External | External | External | External | External | External | External |
| Architecture | R-2R | R-2R | R-2R | R-2R | R-2R | R-2R | R-2R | R-2R |
| Operating Temperature | -40°C ~ 85°C | 0°C ~ 70°C | 0°C ~ 70°C | -40°C ~ 85°C | 0°C ~ 70°C | 0°C ~ 70°C | -40°C ~ 85°C | -40°C ~ 85°C |
| Voltage - Supply, Analog | 11.4V ~ 16.5V, -5V | ±5V | ±5V | ±5V | ±5V | ±5V | ±5V | ±5V |
| Voltage - Supply, Digital | 14.25V ~ 15.75V | 5V | 5V | 5V | 5V | 5V | 5V | 5V |
| INL/DNL (LSB) | ±0.5 (Max), ±1 (Max) | -, ±1 (Max) | -, ±1 (Max) | -, ±1 (Max) | -, ±1 (Max) | -, ±1 (Max) | -, ±1 (Max) | -, ±1 (Max) |
| Package / Case | 24-SSOP (0.209", 5.30mm Width) | 24-SSOP (0.209", 5.30mm Width) | 24-SSOP (0.209", 5.30mm Width) | 24-SSOP (0.209", 5.30mm Width) | 24-SSOP (0.209", 5.30mm Width) | 24-SSOP (0.209", 5.30mm Width) | 24-SSOP (0.209", 5.30mm Width) | 24-SSOP (0.209", 5.30mm Width) |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Product Status | Obsolete | Active | Active | Active | Active | Active | Active | Active |
| RoHS Status | Not specified | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| REACH Status | Not specified | REACH Unaffected | REACH Unaffected | REACH Unaffected | REACH Unaffected | REACH Unaffected | REACH Unaffected | REACH Unaffected |
Engineering Selection Recommendations
Temperature Range Considerations: The AD7225CRSZ operates across -40°C to 85°C. For applications requiring this full extended temperature range, select MAX505AEAG+, MAX505BEAG+, or MAX505BEAG+T. For standard industrial temperature applications (0°C to 70°C), MAX505ACAG+, MAX505ACAG+T, MAX505BCAG+, or MAX505BCAG+T are suitable.
Supply Voltage Compatibility: The original AD7225CRSZ requires dual supply voltages (11.4V ~ 16.5V analog, 14.25V ~ 15.75V digital). All MAX505 substitutes operate on ±5V analog and 5V digital supplies. System redesign of power distribution is required when transitioning to MAX505 series components.
Compliance & Regulatory Status: All MAX505 variants are active products with ROHS3 compliance and REACH unaffected status, providing regulatory assurance for new designs and long-term availability. The obsolete AD7225CRSZ lacks these certifications.
Packaging Format: Tube packaging (MAX505ACAG+, MAX505AEAG+, MAX505BCAG+, MAX505BEAG+) suits lower-volume applications and manual assembly. Tape & Reel format (MAX505ACAG+T, MAX505BCAG+T, MAX505BEAG+T) is optimized for automated pick-and-place manufacturing.
Settling Time Trade-off: The AD7225CRSZ achieves 4µs settling time; MAX505 series components specify 6µs typical. Applications with strict timing requirements below 6µs require performance validation.
Frequently Asked Questions (FAQ)
Q: Can MAX505 series parts directly replace AD7225CRSZ in existing designs?
A: Functional substitution is possible due to identical resolution, channel count, package, and interface architecture. However, supply voltage requirements differ significantly (±5V for MAX505 vs. 11.4V-16.5V for AD7225CRSZ), requiring power supply circuit redesign. Settling time increases from 4µs to 6µs, which must be evaluated against system timing specifications.
Q: What is the difference between Tube and Tape & Reel packaging?
A: Tube packaging (standard suffix) is suitable for manual handling and lower-volume applications. Tape & Reel packaging (suffix +T) is configured for automated surface mount assembly equipment. Both formats contain identical die and electrical performance; selection depends on manufacturing process requirements.
Q: Which MAX505 variant should I select for extended temperature applications?
A: MAX505AEAG+, MAX505BEAG+, and MAX505BEAG+T support the -40°C to 85°C operating range matching the original AD7225CRSZ. Other MAX505 variants operate only to 70°C maximum.
Q: Are all MAX505 substitutes pin-compatible with AD7225CRSZ?
A: Yes. All substitute parts use identical 24-SSOP packaging with 5.30mm width. Pin assignments and functional grouping are equivalent, enabling direct PCB layout compatibility.
Q: What compliance certifications apply to MAX505 substitutes?
A: All MAX505 variants are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for commercial and industrial applications.
Q: How does settling time affect system performance?
A: The AD7225CRSZ settles in 4µs; MAX505 series components settle in 6µs typical. Applications requiring conversion rates faster than 166 kHz (1/6µs) or with strict timing margins below 6µs require performance validation under actual operating conditions.
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