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DAC8550IDGKT Equivalent & Substitute Parts
Part Overview
The DAC8550IDGKT is a 16-bit digital-to-analog converter from Texas Instruments' microPOWER™ series, housed in an 8-VSSOP package. This voltage-output DAC operates across a 2.7V to 5.5V supply range with a 10µs settling time and is designed for applications requiring precision analog signal generation with low power consumption. The part is currently active in production with ROHS3 compliance and is available in Tape & Reel packaging. Equivalent and substitute parts are identified based on matching electrical specifications, package compatibility, and functional equivalence within the data acquisition component category.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Number of Bits | 16 |
| Number of D/A Converters | 1 |
| Output Type | Voltage - Buffered |
| Data Interface | SPI, DSP |
| Reference Type | External |
| Voltage - Supply, Analog | 2.7V ~ 5.5V |
| Voltage - Supply, Digital | 2.7V ~ 5.5V |
| Settling Time | 10µs |
| INL/DNL (LSB) | ±3, ±0.25 |
| Architecture | String DAC |
| Operating Temperature | -40°C ~ 105°C |
| Package / Case | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) |
| Supplier Device Package | 8-VSSOP |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 2 (1 Year) |
Substitute Part Grouping Explanation
Substitute parts for the DAC8550IDGKT are classified into two categories based on parametric equivalence and manufacturer recommendation status.
Parametric Equivalents (Texas Instruments DAC8550/DAC8551 Series): Parts DAC8550IBDGKR, DAC8550IBDGKT, DAC8550IDGKR, DAC8551IADGKR, DAC8551IADGKT, and DAC8551IDGKR maintain identical electrical specifications including 16-bit resolution, 10µs settling time, ±3/±0.25 LSB INL/DNL, external reference architecture, and 2.7V to 5.5V dual supply operation. These parts differ only in temperature grade, packaging format (Tape & Reel vs. Cut Tape), or moisture sensitivity classification. The DAC8550 and DAC8551 variants are functionally interchangeable at the circuit level, with DAC8551 offering improved moisture sensitivity (MSL 1 vs. MSL 2).
Manufacturer Recommended Alternatives (Analog Devices nanoDAC® Series): Parts AD5662ARMZ-1, AD5662ARMZ-1REEL7, AD5662BRMZ-1, and AD5662BRMZ-1REEL7 are cross-functional alternatives from Analog Devices. These maintain the same 16-bit resolution, 10µs settling time, external reference type, 2.7V to 5.5V supply range, SPI/DSP interface, and 8-MSOP package footprint. The primary electrical difference is INL/DNL specification (±8/±1 LSB maximum vs. ±3/±0.25 LSB), and extended operating temperature range (-40°C to 125°C vs. -40°C to 105°C).
Substitution eligibility is determined by matching: resolution (16-bit), converter count (1), output type (voltage-buffered), interface protocol (SPI/DSP), reference architecture (external), supply voltage range (2.7V to 5.5V), and package physical dimensions (8-pin, 0.118" width).
Parameter Comparison
| Part Number | Manufacturer | Bits | Settling Time | INL/DNL (LSB) | Operating Temp | Package | MSL | Packaging Format | Inventory (Pcs) |
|---|---|---|---|---|---|---|---|---|---|
| DAC8550IDGKT | Texas Instruments | 16 | 10µs | ±3, ±0.25 | -40°C ~ 105°C | 8-VSSOP | 2 (1 Year) | Tape & Reel (TR) | 1443 |
| DAC8550IBDGKR | Texas Instruments | 16 | 10µs | ±3, ±0.25 | -40°C ~ 105°C | 8-VSSOP | 2 (1 Year) | Cut Tape (CT) & Digi-Reel® | 2151 |
| DAC8550IBDGKT | Texas Instruments | 16 | 10µs | ±3, ±0.25 | -40°C ~ 105°C | 8-VSSOP | 2 (1 Year) | Cut Tape (CT) & Digi-Reel® | 1225 |
| DAC8550IDGKR | Texas Instruments | 16 | 10µs | ±3, ±0.25 | -40°C ~ 105°C | 8-VSSOP | 2 (1 Year) | Cut Tape (CT) & Digi-Reel® | 16599 |
| DAC8551IADGKR | Texas Instruments | 16 | 10µs | ±3, ±0.25 | -40°C ~ 105°C | 8-VSSOP | 1 (Unlimited) | Cut Tape (CT) & Digi-Reel® | 23450 |
| DAC8551IADGKT | Texas Instruments | 16 | 10µs | ±3, ±0.25 | -40°C ~ 105°C | 8-VSSOP | 1 (Unlimited) | Cut Tape (CT) & Digi-Reel® | 1125 |
| DAC8551IDGKR | Texas Instruments | 16 | 10µs | ±3, ±0.25 | -40°C ~ 105°C | 8-VSSOP | 1 (Unlimited) | Cut Tape (CT) & Digi-Reel® | 1556 |
| AD5662ARMZ-1 | Analog Devices Inc. | 16 | 10µs | ±8, ±1 (Max) | -40°C ~ 125°C | 8-MSOP | 1 (Unlimited) | Tube | 1650 |
| AD5662ARMZ-1REEL7 | Analog Devices Inc. | 16 | 10µs | ±8, ±1 (Max) | -40°C ~ 125°C | 8-MSOP | 1 (Unlimited) | Cut Tape (CT) & Digi-Reel® | 2284 |
| AD5662BRMZ-1 | Analog Devices Inc. | 16 | 10µs | ±8, ±1 (Max) | -40°C ~ 125°C | 8-MSOP | 1 (Unlimited) | Tube | 1361 |
| AD5662BRMZ-1REEL7 | Analog Devices Inc. | 16 | 10µs | ±8, ±1 (Max) | -40°C ~ 125°C | 8-MSOP | 1 (Unlimited) | Cut Tape (CT) & Digi-Reel® | 3462 |
Engineering Selection Recommendations
Texas Instruments DAC8550/DAC8551 Series Selection: For direct pin-compatible replacement within existing PCB designs, select from the DAC8550 or DAC8551 variants. DAC8550IDGKR offers the highest inventory availability (16,599 units) among parametric equivalents while maintaining identical electrical performance. For applications requiring improved moisture handling in humid storage or extended shelf life, DAC8551 variants (MSL 1, Unlimited) are preferred over DAC8550 (MSL 2, 1 Year). Packaging format selection depends on assembly process: Tape & Reel (TR) for high-volume automated pick-and-place, Cut Tape (CT) & Digi-Reel® for mixed-volume or manual assembly operations.
Analog Devices nanoDAC® Series Selection: AD5662 variants are suitable when the application can tolerate relaxed INL/DNL specifications (±8/±1 LSB vs. ±3/±0.25 LSB) and benefit from extended operating temperature range (-40°C to 125°C). The 8-MSOP package footprint is physically compatible with 8-VSSOP designs but requires PCB layout verification. AD5662BRMZ-1REEL7 provides the highest inventory (3,462 units) among Analog Devices alternatives. All AD5662 variants carry MSL 1 (Unlimited) moisture sensitivity, eliminating shelf-life constraints.
Compliance and Certification: All listed parts maintain ROHS3 compliance and REACH Unaffected status, suitable for regulated applications. Moisture sensitivity and operating temperature range should be evaluated against specific application environmental requirements and storage conditions.
Frequently Asked Questions (FAQ)
Q: Can DAC8550IDGKT be directly replaced with DAC8551IADGKR? A: Yes. Both parts share identical electrical specifications (16-bit, 10µs settling time, ±3/±0.25 LSB INL/DNL, 2.7V to 5.5V supply). The primary difference is moisture sensitivity level: DAC8551 offers MSL 1 (Unlimited) versus DAC8550's MSL 2 (1 Year). Pin configuration and package dimensions are identical, enabling direct PCB substitution.
Q: What is the key difference between Texas Instruments and Analog Devices alternatives? A: Texas Instruments DAC8550/DAC8551 parts maintain tighter INL/DNL specifications (±3/±0.25 LSB) and operate to 105°C. Analog Devices AD5662 variants have relaxed INL/DNL (±8/±1 LSB maximum) but extend operating temperature to 125°C and offer unlimited moisture sensitivity. Both families share identical 16-bit resolution, 10µs settling time, and 2.7V to 5.5V supply range.
Q: Are the 8-VSSOP and 8-MSOP packages interchangeable? A: The packages are physically similar (both 0.118" width, 8-pin) and share identical pin pitch. However, PCB footprint verification is required before substitution. Consult package datasheets for exact land pattern dimensions. Thermal and mechanical mounting characteristics may differ slightly between suppliers.
Q: Which substitute part has the best inventory availability? A: DAC8550IDGKR (Texas Instruments) offers 16,599 units in stock, the highest among all listed equivalents. For Analog Devices alternatives, AD5662BRMZ-1REEL7 provides 3,462 units.
Q: Can I use AD5662 in place of DAC8550 if my application requires high precision? A: No. The AD5662's INL/DNL specification (±8/±1 LSB maximum) is significantly relaxed compared to DAC8550 (±3/±0.25 LSB). Applications requiring the tighter accuracy of DAC8550 must use Texas Instruments DAC8550 or DAC8551 variants.
Q: What packaging format should I select for my assembly process? A: Tape & Reel (TR) is standard for high-volume automated assembly with pick-and-place equipment. Cut Tape (CT) & Digi-Reel® is suitable for lower volumes, manual assembly, or mixed-component orders. Tube packaging is used for small quantities or manual handling.
Q: Are all listed parts ROHS3 compliant? A: Yes. All substitute parts listed carry ROHS3 compliance and REACH Unaffected status, meeting regulatory requirements for restricted substance use in electronics manufacturing.
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