DAC8568ICPWR Equivalent & Substitute Parts

Part Overview

The DAC8568ICPWR is a 16-bit digital-to-analog converter (DAC) manufactured by Texas Instruments, featuring 8 independent D/A converter channels in a 16-TSSOP surface mount package. This device is designed for applications requiring multi-channel analog output generation with buffered voltage outputs, supporting both SPI and DSP data interfaces. The part is Active in product status and ROHS3 compliant, making it suitable for modern industrial and consumer electronics applications. Equivalent and substitute parts are identified based on matching electrical specifications, package compatibility, and functional equivalence to support design flexibility and supply chain continuity.

Key Parameters

Parameter	Value
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

Substitute parts for the DAC8568ICPWR are classified into two categories based on parametric equivalence:

Parametric Equivalents (Texas Instruments DAC8568 Series): Parts DAC8568IBPWR and DAC8568IDPWR maintain identical electrical specifications to the main part, including 16-bit resolution, 8 converter channels, 10µs settling time, ±4/±0.2 LSB INL/DNL performance, and -40°C to 125°C operating temperature range. These parts differ only in temperature grade designation (I, B, D suffix variants) and represent direct functional replacements within the same product family.

Manufacturer Recommended Equivalents (Analog Devices AD5668 Series): Parts AD5668ARUZ-2, AD5668ARUZ-3, AD5668ARUZ-3REEL7, AD5668BRUZ-1, AD5668BRUZ-2, AD5668BRUZ-2REEL7, and AD5668BRUZ-3 provide functional equivalence with the following allowances: 7µs settling time (faster than 10µs specification), ±8/±1 LSB INL/DNL performance (wider tolerance than ±4/±0.2), and -40°C to 105°C operating temperature range (narrower than -40°C to 125°C). All parts maintain 16-bit resolution, 8 converter channels, identical supply voltage ranges (2.7V ~ 5.5V), SPI/DSP interfaces, and 16-TSSOP package compatibility.

Functional Compatibility Criteria: Substitution is valid when the application requirements fall within the specified electrical tolerances of the substitute part. The AD5668 series exhibits superior settling time performance but operates within a reduced temperature range and accepts wider INL/DNL tolerances. Packaging variants (Tube vs. Cut Tape & Digi-Reel) do not affect electrical compatibility.

Parameter Comparison

Parameter	DAC8568ICPWR	DAC8568IBPWR	DAC8568IDPWR	AD5668ARUZ-2	AD5668ARUZ-3	AD5668BRUZ-1	AD5668BRUZ-2	AD5668BRUZ-3
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	Analog Devices	Analog Devices	Analog Devices	Analog Devices	Analog Devices
Number of Bits	16	16	16	16	16	16	16	16
Number of D/A Converters	8	8	8	8	8	8	8	8
Settling Time	10µs	10µs	10µs	7µs	7µs	7µs	7µs	7µs
Output Type	Voltage - Buffered	Voltage - Buffered	Voltage - Buffered	Voltage - Buffered	Voltage - Buffered	Voltage - Buffered	Voltage - Buffered	Voltage - Buffered
Data Interface	SPI, DSP	SPI, DSP	SPI, DSP	SPI, DSP	SPI, DSP	SPI, DSP	SPI, DSP	SPI, DSP
Reference Type	External, Internal	External, Internal	External, Internal	External, Internal	External, Internal	External, Internal	External, Internal	External, Internal
Voltage - Supply, Analog	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V
Voltage - Supply, Digital	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V
INL/DNL (LSB)	±4, ±0.2	±4, ±0.2	±4, ±0.2	±8, ±1 (Max)	±8, ±1 (Max)	±8, ±1 (Max)	±8, ±1 (Max)	±8, ±1 (Max)
Architecture	String DAC	String DAC	String DAC	String DAC	String DAC	String DAC	String DAC	String DAC
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C
Package / Case	16-TSSOP	16-TSSOP	16-TSSOP	16-TSSOP	16-TSSOP	16-TSSOP	16-TSSOP	16-TSSOP
Mounting Type	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
Moisture Sensitivity Level (MSL)	2 (1 Year)	2 (1 Year)	2 (1 Year)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Texas Instruments DAC8568 Series (DAC8568IBPWR, DAC8568IDPWR): These parts are direct parametric equivalents to the DAC8568ICPWR and are recommended as primary substitutes when supply constraints affect the main part number. All three variants maintain identical electrical performance specifications and operating temperature range. Selection among I, B, and D suffix variants is determined by application temperature requirements and supplier availability. All variants are Active in product status and ROHS3 compliant.

Analog Devices AD5668 Series: These parts are suitable substitutes when application requirements accommodate the specified parameter variations. The AD5668 series offers superior settling time performance (7µs vs. 10µs), which benefits applications requiring faster analog output settling. However, the operating temperature range is limited to -40°C to 105°C, making these parts unsuitable for applications requiring operation above 105°C. The wider INL/DNL tolerance (±8/±1 LSB vs. ±4/±0.2 LSB) must be evaluated against application accuracy requirements. All AD5668 variants are Active in product status and ROHS3 compliant. The AD5668 series exhibits superior moisture sensitivity performance (MSL 1 vs. MSL 2), providing extended shelf life without baking requirements.

Packaging Considerations: Cut Tape & Digi-Reel packaging (REEL7 suffix variants) and Tube packaging are functionally equivalent and differ only in supply format. Selection is based on manufacturing process requirements and inventory management practices.

Frequently Asked Questions (FAQ)

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

A: Yes. These parts are parametric equivalents within the Texas Instruments DAC8568 family, maintaining identical electrical specifications including 16-bit resolution, 8 converter channels, 10µs settling time, ±4/±0.2 LSB INL/DNL performance, and -40°C to 125°C operating temperature range. The suffix designations (I, B, D) indicate temperature grade variants and do not affect functional performance.

Q: What are the key differences between DAC8568ICPWR and AD5668 series parts?

A: The primary differences are settling time (7µs for AD5668 vs. 10µs for DAC8568), INL/DNL tolerance (±8/±1 LSB for AD5668 vs. ±4/±0.2 LSB for DAC8568), and operating temperature range (-40°C to 105°C for AD5668 vs. -40°C to 125°C for DAC8568). All other electrical specifications including resolution, channel count, supply voltage ranges, and data interfaces are identical.

Q: Are AD5668 parts suitable for high-temperature applications above 105°C?

A: No. The AD5668 series is specified for operation only to 105°C maximum. Applications requiring operation above 105°C must use the DAC8568 series, which is rated to 125°C.

Q: Does settling time difference affect PCB layout or signal integrity?

A: Settling time affects the speed at which analog output reaches final value after a digital input change. The faster 7µs settling time of AD5668 parts may reduce settling-related noise and improve system response time in applications with rapid output changes. However, this difference does not affect PCB layout requirements or signal integrity considerations, which are determined by package type and application bandwidth.

Q: What is the significance of MSL rating differences?

A: Moisture Sensitivity Level (MSL) indicates the maximum time a component can be stored at room temperature after moisture absorption without requiring baking before reflow soldering. DAC8568 parts (MSL 2) require baking if stored longer than 1 year in standard conditions. AD5668 parts (MSL 1) have unlimited shelf life without baking requirements, reducing manufacturing process complexity for high-volume production.

Q: Can I substitute AD5668ARUZ-2 for DAC8568ICPWR in a precision measurement application?

A: Substitution depends on application accuracy requirements. The AD5668ARUZ-2 exhibits wider INL/DNL tolerance (±8/±1 LSB maximum) compared to DAC8568ICPWR (±4/±0.2 LSB). If application specifications require INL/DNL performance better than ±8/±1 LSB, the AD5668 series is not suitable. If application tolerances accommodate ±8/±1 LSB performance, substitution is valid.

Q: Are packaging variants (Tube vs. Cut Tape & Digi-Reel) electrically equivalent?

A: Yes. Packaging variants differ only in supply format and do not affect electrical performance or functional compatibility. Selection is based on manufacturing process requirements and inventory management practices.

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