DAC8568IAPWR 16-Bit Digital to Analog Converter Equivalent & Substitute Parts

Part Overview

The DAC8568IAPWR is a 16-bit digital to analog converter manufactured by Texas Instruments, designed for data acquisition applications requiring eight independent voltage output channels. The device operates across a 2.7V to 5.5V supply range and features SPI/DSP data interfaces with both external and internal reference support. This part is active in production status with ROHS3 compliance and is available in 16-TSSOP surface mount packaging.

Equivalent and substitute parts are identified based on matching electrical specifications, package compatibility, and functional equivalence. Texas Instruments parametric variants and Analog Devices denseDAC series alternatives provide direct substitution capability for applications requiring component interchangeability or inventory optimization.

Key Parameters

Parameter	Specification
Number of Bits	16
Number of D/A Converters	8
Settling Time	10µs
Output Type	Voltage - Buffered
Data Interface	SPI, DSP
Reference Type	External, Internal
Voltage - Supply, Analog	2.7V ~ 5.5V
Voltage - Supply, Digital	2.7V ~ 5.5V
INL/DNL (LSB)	±4, ±0.2
Architecture	String DAC
Operating Temperature	-40°C ~ 125°C
Package / Case	16-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	2 (1 Year)

Substitute Part Grouping Explanation

Substitution relationships are established through parametric equivalence within the following criteria:

Primary Substitution Criteria:

16-bit resolution with 8 independent D/A converters
Voltage output type with buffered configuration
SPI and DSP data interface support
External and internal reference capability
2.7V to 5.5V dual supply voltage range
16-TSSOP surface mount package
String DAC architecture

Texas Instruments Parametric Variants (DAC8568 Series): DAC8568IBPWR, DAC8568ICPWR, and DAC8568IDPWR are direct parametric equivalents differing only in temperature grade or packaging format. These variants maintain identical electrical specifications including 10µs settling time and ±4/±0.2 LSB INL/DNL performance.

Analog Devices Cross-Manufacturer Alternatives (AD5668 Series): AD5668ARUZ-2, AD5668ARUZ-3, AD5668ARUZ-3REEL7, AD5668BRUZ-1, AD5668BRUZ-2, and AD5668BRUZ-2REEL7 provide functional equivalence with the following parameter alignment: 16-bit resolution, 8 converters, buffered voltage output, SPI/DSP interfaces, matching supply voltage range, and identical 16-TSSOP packaging. The AD5668 series exhibits faster settling time (7µs versus 10µs) and different INL/DNL specifications (±8/±1 Max), with operating temperature range limited to -40°C to 105°C.

Parameter Comparison

Part Number	Manufacturer	Bits	Converters	Settling Time	INL/DNL (LSB)	Temp Range	MSL	Inventory (Pcs)
DAC8568IAPWR	Texas Instruments	16	8	10µs	±4, ±0.2	-40°C ~ 125°C	2 (1 Year)	21123
DAC8568IBPWR	Texas Instruments	16	8	10µs	±4, ±0.2	-40°C ~ 125°C	2 (1 Year)	7538
DAC8568ICPWR	Texas Instruments	16	8	10µs	±4, ±0.2	-40°C ~ 125°C	2 (1 Year)	15640
DAC8568IDPWR	Texas Instruments	16	8	10µs	±4, ±0.2	-40°C ~ 125°C	2 (1 Year)	16675
AD5668ARUZ-2	Analog Devices Inc.	16	8	7µs	±8, ±1 (Max)	-40°C ~ 105°C	1 (Unlimited)	1761
AD5668ARUZ-3	Analog Devices Inc.	16	8	7µs	±8, ±1 (Max)	-40°C ~ 105°C	1 (Unlimited)	2456
AD5668ARUZ-3REEL7	Analog Devices Inc.	16	8	7µs	±8, ±1 (Max)	-40°C ~ 105°C	1 (Unlimited)	21142
AD5668BRUZ-1	Analog Devices Inc.	16	8	7µs	±8, ±1 (Max)	-40°C ~ 105°C	1 (Unlimited)	1265
AD5668BRUZ-2	Analog Devices Inc.	16	8	7µs	±8, ±1 (Max)	-40°C ~ 105°C	1 (Unlimited)	1864
AD5668BRUZ-2REEL7	Analog Devices Inc.	16	8	7µs	±8, ±1 (Max)	-40°C ~ 105°C	1 (Unlimited)	5654
AD5668BRUZ-3	Analog Devices Inc.	16	8	7µs	±8, ±1 (Max)	-40°C ~ 105°C	1 (Unlimited)	1544

Engineering Selection Recommendations

Texas Instruments DAC8568 Series (IBPWR, ICPWR, IDPWR): These variants are direct parametric equivalents to the DAC8568IAPWR and provide identical electrical performance. Selection among these options is determined by packaging format availability and inventory requirements. All variants maintain ROHS3 compliance and active product status. The extended operating temperature range to 125°C is retained across all variants.

Analog Devices AD5668 Series (denseDAC): The AD5668 family provides functional equivalence with improved settling time performance (7µs versus 10µs). These parts are suitable for applications where faster conversion settling is beneficial. The AD5668 series maintains ROHS3 compliance and active product status. Operating temperature range is limited to 105°C maximum, which may restrict use in extended temperature applications. Moisture sensitivity level is improved to MSL 1 (Unlimited) compared to MSL 2 (1 Year) for the DAC8568 series.

Packaging and Availability Considerations: Tube packaging is standard for most variants. Cut Tape (CT) & Digi-Reel® packaging is available for DAC8568ICPWR, AD5668ARUZ-3REEL7, and AD5668BRUZ-2REEL7, providing options for automated assembly processes. Inventory levels vary across part numbers; AD5668ARUZ-3REEL7 offers the highest stock availability at 21,142 pieces.

Frequently Asked Questions (FAQ)

Q: Can DAC8568IBPWR, DAC8568ICPWR, and DAC8568IDPWR be used interchangeably with DAC8568IAPWR?

A: Yes. These Texas Instruments variants are parametric equivalents with identical electrical specifications including 16-bit resolution, 8 converters, 10µs settling time, ±4/±0.2 LSB INL/DNL performance, and -40°C to 125°C operating range. Differences are limited to packaging format or internal grade designations that do not affect functional performance.

Q: What are the key differences between DAC8568 and AD5668 series?

A: The primary differences are settling time (10µs for DAC8568 versus 7µs for AD5668), INL/DNL specifications (±4/±0.2 LSB for DAC8568 versus ±8/±1 Max for AD5668), maximum operating temperature (125°C for DAC8568 versus 105°C for AD5668), and moisture sensitivity level (MSL 2 for DAC8568 versus MSL 1 for AD5668). Both families share identical 16-bit resolution, 8-converter architecture, buffered voltage output, SPI/DSP interfaces, and 16-TSSOP packaging.

Q: Are AD5668 parts suitable for high-temperature applications?

A: AD5668 parts are rated to 105°C maximum operating temperature, which is 20°C lower than the DAC8568 series maximum of 125°C. Applications requiring operation above 105°C must use DAC8568 variants.

Q: What is the difference between tube and reel packaging?

A: Tube packaging is suitable for manual assembly and lower-volume applications. Cut Tape (CT) & Digi-Reel® packaging is optimized for automated pick-and-place assembly processes and higher-volume production. Electrical performance is identical between packaging formats.

Q: Can I substitute an AD5668 part in a design originally specified for DAC8568?

A: Functional substitution is possible due to matching resolution, converter count, output type, data interfaces, and package. However, the faster settling time (7µs) and different INL/DNL specifications of the AD5668 must be evaluated against application timing and accuracy requirements. Temperature range limitations of the AD5668 (105°C maximum) must also be considered for extended-temperature applications.

Q: What does MSL rating mean for component selection?

A: Moisture Sensitivity Level (MSL) indicates the maximum time a component can be stored in ambient conditions before requiring baking prior to reflow soldering. DAC8568 parts with MSL 2 (1 Year) require baking if stored longer than one year. AD5668 parts with MSL 1 (Unlimited) have no time-based storage restrictions.

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