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DAC7741YB/2K Equivalent & Substitute Parts
Part Overview
The DAC7741YB/2K is a 16-bit Digital to Analog Converter manufactured by Texas Instruments, designed for data acquisition applications requiring voltage output buffering. This component features a single D/A converter with R-2R architecture, 5µs settling time, and parallel data interface. The part is classified as obsolete, which necessitates identification of active equivalent alternatives to maintain design continuity and ensure supply chain availability for new production and maintenance applications.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | DAC7741YB/2K |
| Manufacturer | Texas Instruments |
| Number of Bits | 16 |
| Number of D/A Converters | 1 |
| Output Type | Voltage - Buffered |
| Settling Time | 5µs |
| Data Interface | Parallel |
| Architecture | R-2R |
| Package / Case | 48-LQFP (7x7) |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -40°C ~ 85°C |
| Voltage - Supply, Analog | ±11.4V ~ 15.75V, -4.75V ~ -15.75V |
| Voltage - Supply, Digital | 5V |
| INL/DNL (LSB) | ±4 (Max), ±2 (Max) |
| Reference Type | External, Internal |
| Product Status | Obsolete |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 3 (168 Hours) |
Substitute Part Grouping Explanation
Substitution of the DAC7741YB/2K is determined by strict equivalence across the following critical parameters:
- 16-bit resolution with single D/A converter configuration
- Voltage-buffered output type with parallel data interface
- R-2R architecture with 5µs settling time
- 48-LQFP (7x7) surface mount package
- Identical analog and digital supply voltage specifications
- Matching INL/DNL performance: ±4 LSB (Max) and ±2 LSB (Max)
- External and internal reference type capability
- Operating temperature range of -40°C to 85°C
- ROHS3 compliance and MSL 3 rating
The DAC7741YB/250 meets all these criteria and represents a parametric equivalent. The primary distinction is packaging format and product status: DAC7741YB/250 is active production with Cut Tape and Digi-Reel packaging options, whereas DAC7741YB/2K is obsolete.
Parameter Comparison
| Parameter | DAC7741YB/2K (Main) | DAC7741YB/250 (Substitute) |
|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments |
| Number of Bits | 16 | 16 |
| Number of D/A Converters | 1 | 1 |
| Output Type | Voltage - Buffered | Voltage - Buffered |
| Settling Time | 5µs | 5µs |
| Data Interface | Parallel | Parallel |
| Architecture | R-2R | R-2R |
| Package / Case | 48-LQFP (7x7) | 48-LQFP (7x7) |
| Mounting Type | Surface Mount | Surface Mount |
| Operating Temperature Range | -40°C ~ 85°C | -40°C ~ 85°C |
| Voltage - Supply, Analog | ±11.4V ~ 15.75V, -4.75V ~ -15.75V | ±11.4V ~ 15.75V, -4.75V ~ -15.75V |
| Voltage - Supply, Digital | 5V | 5V |
| INL/DNL (LSB) | ±4 (Max), ±2 (Max) | ±4 (Max), ±2 (Max) |
| Reference Type | External, Internal | External, Internal |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 3 (168 Hours) | 3 (168 Hours) |
| Product Status | Obsolete | Active |
| Packaging Format | Not specified | Cut Tape (CT) & Digi-Reel® |
Engineering Selection Recommendations
The DAC7741YB/250 is the direct parametric equivalent for DAC7741YB/2K replacement. Both parts share identical electrical specifications, package geometry, and performance characteristics. The DAC7741YB/250 is currently in active production status, ensuring supply chain continuity and availability for new designs and production runs.
Both parts maintain ROHS3 compliance and identical moisture sensitivity ratings, supporting equivalent handling and storage requirements. The DAC7741YB/250 offers the additional advantage of standard packaging options (Cut Tape and Digi-Reel), facilitating procurement flexibility for volume and prototype applications.
For applications currently using DAC7741YB/2K, direct substitution with DAC7741YB/250 requires no circuit modifications, PCB layout changes, or firmware adjustments due to complete parametric equivalence.
Frequently Asked Questions (FAQ)
Q: Can DAC7741YB/250 be used as a direct replacement for DAC7741YB/2K?
A: Yes. Both parts are parametrically identical across all electrical and mechanical specifications. No circuit design changes are required for substitution.
Q: What is the difference between DAC7741YB/2K and DAC7741YB/250?
A: The primary differences are product status and packaging format. DAC7741YB/2K is obsolete, while DAC7741YB/250 is active production. DAC7741YB/250 is available in Cut Tape and Digi-Reel packaging options. All functional and electrical parameters are identical.
Q: Are there any pin compatibility concerns?
A: No. Both parts use the 48-LQFP (7x7) package with identical pinout. PCB footprints and assembly processes remain unchanged.
Q: Do supply voltage requirements differ between these parts?
A: No. Both parts require identical analog supply voltages (±11.4V ~ 15.75V, -4.75V ~ -15.75V) and digital supply voltage (5V).
Q: Are the performance specifications identical?
A: Yes. Both parts feature 16-bit resolution, 5µs settling time, ±4 LSB INL and ±2 LSB DNL specifications, and R-2R architecture.
Q: What is the operating temperature range for both parts?
A: Both parts operate across -40°C to 85°C.
Q: Are moisture sensitivity and RoHS compliance the same?
A: Yes. Both parts are ROHS3 compliant with MSL 3 rating (168 hours).
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