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DAC7541AJUG4 Equivalent & Substitute Parts
Part Overview
The DAC7541AJUG4 is a 12-bit digital-to-analog converter manufactured by Texas Instruments, housed in an 18-SOIC package. This component features a single D/A converter with current-unbuffered output, external reference capability, and R-2R architecture. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. Substitute parts must maintain functional compatibility across critical electrical parameters including bit resolution, settling time, output type, supply voltage ranges, and package form factor.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Number of Bits | 12 |
| Number of D/A Converters | 1 |
| Output Type | Current - Unbuffered |
| Differential Output | Yes |
| Data Interface | Parallel |
| Reference Type | External |
| Architecture | R-2R |
| Voltage - Supply, Analog | 5V ~ 16V |
| Voltage - Supply, Digital | 5V ~ 16V |
| Package / Case | 18-SOIC (0.295", 7.50mm Width) |
| Mounting Type | Surface Mount |
| Operating Temperature | 0°C ~ 70°C |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution eligibility for the DAC7541AJUG4 is determined by strict adherence to the following electrical and mechanical parameters:
Critical Substitution Parameters:
- 12-bit resolution (Number of Bits)
- Single D/A converter configuration
- Current-unbuffered output type
- Differential output capability
- Parallel data interface
- External reference requirement
- R-2R architecture
- 18-SOIC package form factor
- Surface mount mounting type
- 5V ~ 16V analog and digital supply voltage range
- 0°C ~ 70°C operating temperature range
Substitute parts are grouped into two categories based on these parameters:
Category 1: Direct Electrical & Package Equivalents — Parts maintaining identical electrical specifications, supply voltage ranges, temperature range, and 18-SOIC packaging. These include AD7541AKRZ, AD7541AKRZ-REEL, AD7541AKRZ-REEL7, LTC7541AJSW#TRPBF, LTC7541AJSW#PBF, MX7541AJCWN+, MX7541AKCWN+, and MX7541AKCWN+T.
Category 2: Functional Equivalent with Package Variation — The DAC7821IPW maintains 12-bit resolution, single D/A converter, current-unbuffered output, differential output, parallel interface, external reference, and R-2R architecture. However, it uses a 20-TSSOP package instead of 18-SOIC, operates at a reduced supply voltage range (2.7V ~ 5.5V), and supports an extended temperature range (-40°C ~ 125°C). This part is suitable only when PCB layout accommodates the different package footprint and system supply voltages remain within 2.7V ~ 5.5V.
Parameter Comparison
| Parameter | DAC7541AJUG4 | AD7541AKRZ | AD7541AKRZ-REEL | AD7541AKRZ-REEL7 | LTC7541AJSW#TRPBF | LTC7541AJSW#PBF | MX7541AJCWN+ | MX7541AKCWN+ | MX7541AKCWN+T | MX7541AKEWN+ | DAC7821IPW |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | Texas Instruments | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc./Maxim Integrated | Analog Devices Inc./Maxim Integrated | Analog Devices Inc./Maxim Integrated | Analog Devices Inc./Maxim Integrated | Texas Instruments |
| Number of Bits | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 |
| Number of D/A Converters | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Settling Time | 1µs | 600ns (Typ) | 600ns (Typ) | 600ns (Typ) | 600ns (Typ) | 600ns (Typ) | 600ns (Typ) | 600ns (Typ) | 600ns (Typ) | 600ns (Typ) | 200ns |
| Output Type | Current - Unbuffered | Current - Unbuffered | Current - Unbuffered | Current - Unbuffered | Current - Unbuffered | Current - Unbuffered | Current - Unbuffered | Current - Unbuffered | Current - Unbuffered | Current - Unbuffered | Current - Unbuffered |
| Differential Output | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Data Interface | Parallel | Parallel | Parallel | Parallel | Parallel | Parallel | Parallel | Parallel | Parallel | Parallel | Parallel |
| Reference Type | External | External | External | External | External | External | External | External | External | External | External |
| Voltage - Supply, Analog | 5V ~ 16V | 5V ~ 16V | 5V ~ 16V | 5V ~ 16V | 5V ~ 16V | 5V ~ 16V | 5V ~ 16V | 5V ~ 16V | 5V ~ 16V | 5V ~ 16V | 2.7V ~ 5.5V |
| Voltage - Supply, Digital | 5V ~ 16V | 5V ~ 16V | 5V ~ 16V | 5V ~ 16V | 5V ~ 16V | 5V ~ 16V | 5V ~ 16V | 5V ~ 16V | 5V ~ 16V | 5V ~ 16V | 2.7V ~ 5.5V |
| INL/DNL (LSB) | ±1 (Max), ±1 (Max) | ±0.5 (Max), ±0.5 (Max) | ±0.5 (Max), ±0.5 (Max) | ±0.5 (Max), ±0.5 (Max) | ±1 (Max), ±1 (Max) | ±1 (Max), ±1 (Max) | ±1 (Max), ±1 (Max) | ±0.5 (Max), ±0.5 (Max) | ±0.5 (Max), ±0.5 (Max) | ±0.5 (Max), ±0.5 (Max) | ±1 (Max), ±1 (Max) |
| Architecture | R-2R | R-2R | R-2R | R-2R | R-2R | R-2R | R-2R | R-2R | R-2R | R-2R | R-2R |
| Operating Temperature | 0°C ~ 70°C | 0°C ~ 70°C | 0°C ~ 70°C | 0°C ~ 70°C | 0°C ~ 70°C | 0°C ~ 70°C | 0°C ~ 70°C | 0°C ~ 70°C | 0°C ~ 70°C | 0°C ~ 70°C | -40°C ~ 125°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) | 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) | 20-TSSOP (0.173", 4.40mm Width) |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Product Status | Obsolete | Active | Active | Active | Active | Active | Active | Active | Active | Active | Active |
Engineering Selection Recommendations
Primary Substitutes (Direct Equivalents):
The AD7541AKRZ, AD7541AKRZ-REEL, and AD7541AKRZ-REEL7 from Analog Devices Inc. are the preferred substitutes. These parts maintain identical electrical specifications, package form factor, and operating temperature range. All three variants are active products with ROHS3 compliance and REACH unaffected status. The AD7541AKRZ variants offer improved INL/DNL specifications (±0.5 LSB maximum versus ±1 LSB for the original part), providing enhanced accuracy. Selection between tube and tape-and-reel packaging depends on procurement volume and assembly requirements.
The LTC7541AJSW#TRPBF and LTC7541AJSW#PBF from Analog Devices Inc. are functionally equivalent alternatives. These parts maintain the same electrical parameters, package, and temperature range as the DAC7541AJUG4. Both are active products with superior moisture sensitivity levels (MSL 1 versus MSL 3 for the original part).
The MX7541 series (MX7541AJCWN+, MX7541AKCWN+, MX7541AKCWN+T, MX7541AKEWN+) from Analog Devices Inc./Maxim Integrated are direct functional equivalents available in multiple packaging options. The MX7541AKCWN+ and MX7541AKCWN+T variants feature improved INL/DNL specifications (±0.5 LSB maximum). All MX7541 variants are active products with MSL 1 rating.
Secondary Substitute (Package Variation):
The DAC7821IPW from Texas Instruments is a functional equivalent with critical differences. It maintains 12-bit resolution, single D/A converter, current-unbuffered output, differential output, parallel interface, external reference, and R-2R architecture. However, it uses a 20-TSSOP package instead of 18-SOIC, operates at a reduced supply voltage range (2.7V ~ 5.5V), and supports an extended temperature range (-40°C ~ 125°C). This part is suitable only when system design accommodates the different package footprint and supply voltage constraints.
All substitute parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.
Frequently Asked Questions (FAQ)
Q: Can I use AD7541AKRZ as a direct replacement for DAC7541AJUG4?
A: Yes. The AD7541AKRZ maintains identical electrical specifications, 18-SOIC package form factor, and 0°C ~ 70°C operating temperature range. It is an active product with ROHS3 compliance. The improved INL/DNL specification (±0.5 LSB versus ±1 LSB) provides enhanced accuracy without affecting functional compatibility.
Q: What is the difference between AD7541AKRZ, AD7541AKRZ-REEL, and AD7541AKRZ-REEL7?
A: These three variants are electrically identical. The differences are packaging format: AD7541AKRZ is supplied in tube packaging, AD7541AKRZ-REEL uses standard tape-and-reel format, and AD7541AKRZ-REEL7 uses tape-and-reel format. Selection depends on procurement volume and assembly line requirements.
Q: Can I use DAC7821IPW instead of DAC7541AJUG4?
A: The DAC7821IPW is functionally equivalent but has critical differences. It uses a 20-TSSOP package instead of 18-SOIC, requiring PCB layout modification. Its supply voltage range is 2.7V ~ 5.5V, which is narrower than the DAC7541AJUG4 (5V ~ 16V). Use this part only if your system operates within 2.7V ~ 5.5V and PCB layout accommodates the different package footprint.
Q: What are the key parameters that determine substitution eligibility?
A: Substitution is determined by 12-bit resolution, single D/A converter, current-unbuffered output, differential output capability, parallel data interface, external reference requirement, R-2R architecture, 18-SOIC package form factor, and 5V ~ 16V supply voltage range. Operating temperature range (0°C ~ 70°C) and surface mount mounting type are also critical.
Q: Why is the DAC7541AJUG4 marked as obsolete?
A: The DAC7541AJUG4 is classified as obsolete by Texas Instruments. Active substitute parts from Analog Devices Inc. and Maxim Integrated provide equivalent or superior performance with ongoing manufacturing support and availability.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All substitute parts listed are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic components.
Q: What is the difference in settling time between the original part and substitutes?
A: The DAC7541AJUG4 has a settling time of 1µs. Most substitute parts (AD7541AKRZ, LTC7541AJSW variants, MX7541 series) have a typical settling time of 600ns, providing faster response. The DAC7821IPW offers 200ns settling time. Faster settling time does not affect backward compatibility but may improve system performance.
Q: Which substitute offers the best INL/DNL performance?
A: The AD7541AKRZ, AD7541AKRZ-REEL, AD7541AKRZ-REEL7, MX7541AKCWN+, MX7541AKCWN+T, and MX7541AKEWN+ offer ±0.5 LSB maximum INL/DNL specifications, compared to ±1 LSB for the original DAC7541AJUG4. This represents improved linearity and accuracy.
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