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DAC811KP Equivalent & Substitute Parts
Part Overview
The DAC811KP is a 12-bit digital-to-analog converter manufactured by Texas Instruments, designed for data acquisition applications requiring voltage output buffering. This component features an internal reference, parallel data interface, and R-2R architecture with ±0.125/±0.25 LSB INL/DNL specifications. The DAC811KP is classified as obsolete, making equivalent substitute parts necessary for ongoing system support and new design implementations where this legacy component is specified.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Resolution | 12 Bit |
| Number of D/A Converters | 1 |
| Settling Time | 4µs |
| Output Type | Voltage - Buffered |
| Data Interface | Parallel |
| Reference Type | Internal |
| Analog Supply Voltage | ±11.4V ~ 16.5V |
| Digital Supply Voltage | 5V |
| INL/DNL | ±0.125, ±0.25 LSB |
| Architecture | R-2R |
| Operating Temperature Range | 0°C ~ 70°C |
Substitute Part Grouping Explanation
Substitute parts for the DAC811KP are identified based on strict electrical and mechanical parameter equivalence. The primary substitution criterion requires matching all core functional specifications: 12-bit resolution, single converter configuration, 4µs settling time, buffered voltage output, parallel data interface, internal reference architecture, identical supply voltage ranges (±11.4V ~ 16.5V analog, 5V digital), and equivalent INL/DNL performance (±0.125/±0.25 LSB). The DAC811KU qualifies as a direct substitute based on complete electrical parameter alignment. The key differentiator between the main part and its substitute is the package type: the DAC811KP uses 28-DIP through-hole packaging, while the DAC811KU uses 28-SOIC surface-mount packaging. Both maintain identical electrical performance and operating specifications within the 0°C to 70°C temperature range.
Parameter Comparison
| Parameter | DAC811KP (Main) | DAC811KU (Substitute) |
|---|---|---|
| Manufacturer | Texas Instruments | Burr Brown |
| Resolution (Bits) | 12 | 12 |
| Number of D/A Converters | 1 | 1 |
| Settling Time | 4µs | 4µs |
| Output Type | Voltage - Buffered | Voltage - Buffered |
| Data Interface | Parallel | Parallel |
| Reference Type | Internal | Internal |
| Analog Supply Voltage | ±11.4V ~ 16.5V | ±11.4V ~ 16.5V |
| Digital Supply Voltage | 5V | 5V |
| INL/DNL (LSB) | ±0.125, ±0.25 | ±0.125, ±0.25 |
| Architecture | R-2R | R-2R |
| Operating Temperature | 0°C ~ 70°C | 0°C ~ 70°C |
| Package Type | 28-DIP (Through Hole) | 28-SOIC (Surface Mount) |
| Product Status | Obsolete | Active |
| RoHS Status | ROHS3 Compliant | Not specified |
Engineering Selection Recommendations
The DAC811KU serves as the primary substitute for the DAC811KP due to complete electrical parameter equivalence and active product status. Selection between these parts depends on mounting technology requirements: the DAC811KP accommodates through-hole assembly on conventional PCBs, while the DAC811KU requires surface-mount assembly capability. For legacy system repairs or board revisions where through-hole mounting is mandated, the DAC811KP remains the appropriate choice despite obsolete status. For new designs or systems undergoing modernization, the DAC811KU is preferred due to its active product status, ensuring long-term availability and supply chain stability. Both parts maintain ROHS3 compliance and identical electrical performance specifications, supporting equivalent functional integration in data acquisition circuits.
Frequently Asked Questions (FAQ)
Q: Can the DAC811KU directly replace the DAC811KP in existing PCB designs?
A: Electrical substitution is complete; however, physical replacement requires PCB modification. The DAC811KP uses 28-DIP through-hole packaging while the DAC811KU uses 28-SOIC surface-mount packaging. Direct socket replacement is not possible without PCB redesign and assembly process changes.
Q: Are there any performance differences between the DAC811KP and DAC811KU?
A: No. Both parts maintain identical electrical specifications: 12-bit resolution, 4µs settling time, ±0.125/±0.25 LSB INL/DNL, buffered voltage output, parallel data interface, internal reference, and equivalent supply voltage ranges (±11.4V ~ 16.5V analog, 5V digital).
Q: Why is the DAC811KP listed as obsolete?
A: The DAC811KP has reached end-of-life status from Texas Instruments. The DAC811KU, manufactured by Burr Brown, represents the active equivalent with identical electrical performance and current availability.
Q: What are the key parameters that determine substitution eligibility?
A: Substitution requires matching: 12-bit resolution, single converter configuration, 4µs settling time, buffered voltage output, parallel data interface, internal reference architecture, ±11.4V ~ 16.5V analog supply, 5V digital supply, ±0.125/±0.25 LSB INL/DNL specifications, and R-2R architecture. Package type is the only allowable difference.
Q: Are both parts RoHS compliant?
A: The DAC811KP is ROHS3 compliant. RoHS compliance status for the DAC811KU is not specified in available documentation.
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