DAC7811IDGS Equivalent & Substitute Parts

Part Overview

The DAC7811IDGS is a 12-bit digital-to-analog converter manufactured by Texas Instruments, designed for data acquisition applications requiring single-channel current output conversion. The device operates across a 2.7V to 5.5V supply range with R-2R architecture and external reference configuration. Product status is Active with ROHS3 compliance and full inventory availability. Substitute parts are identified based on matching core electrical specifications and package compatibility to support design flexibility and supply chain alternatives.

Key Parameters

Parameter	DAC7811IDGS
Number of Bits	12
Number of D/A Converters	1
Settling Time	200ns
Output Type	Current - Unbuffered
Differential Output	Yes
Data Interface	SPI
Reference Type	External
Voltage - Supply, Analog	2.7V ~ 5.5V
Voltage - Supply, Digital	2.7V ~ 5.5V
INL/DNL (LSB)	±1 (Max), ±1 (Max)
Architecture	R-2R
Operating Temperature	-40°C ~ 125°C
Package / Case	10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	2 (1 Year)

Substitute Part Grouping Explanation

Substitute parts for the DAC7811IDGS are qualified based on the following core electrical and mechanical parameters:

Critical Matching Parameters:

12-bit resolution
Single D/A converter channel
Current output, unbuffered configuration
Differential output capability
SPI data interface support
External reference requirement
R-2R architecture
Operating temperature range -40°C to 125°C
Surface mount packaging (10-MSOP or 10-TFSOP)

Allowed Variations:

Settling time: Faster performance acceptable (200ns baseline)
Supply voltage range: Minimum 2.5V acceptable (baseline 2.7V minimum)
INL/DNL specifications: Equal or tighter tolerances acceptable
Data interface: SPI with additional protocol support (DSP) acceptable
Moisture sensitivity: Lower MSL values acceptable
Packaging format: Tube or Cut Tape & Digi-Reel acceptable

Substitute parts include DAC7811IDGSR (Texas Instruments, alternative packaging), AD5443YRMZ, AD5443YRMZ-REEL, AD5443YRMZ-REEL7 (Analog Devices, enhanced performance), AD5444YRMZ, and AD5444YRMZ-REEL7 (Analog Devices, superior settling time and linearity).

Parameter Comparison

Parameter	DAC7811IDGS	DAC7811IDGSR	AD5443YRMZ	AD5443YRMZ-REEL	AD5443YRMZ-REEL7	AD5444YRMZ	AD5444YRMZ-REEL7
Manufacturer	Texas Instruments	Texas Instruments	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.
Number of Bits	12	12	12	12	12	12	12
Number of D/A Converters	1	1	1	1	1	1	1
Settling Time	200ns	200ns	160ns	160ns	160ns	110ns	110ns
Output Type	Current - Unbuffered	Current - Unbuffered	Current - Unbuffered	Current - Unbuffered	Current - Unbuffered	Current - Unbuffered	Current - Unbuffered
Differential Output	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Data Interface	SPI	SPI	SPI, DSP	SPI, DSP	SPI, DSP	SPI, DSP	SPI, DSP
Reference Type	External	External	External	External	External	External	External
Voltage - Supply, Analog	2.7V ~ 5.5V	2.7V ~ 5.5V	2.5V ~ 5.5V	2.5V ~ 5.5V	2.5V ~ 5.5V	2.5V ~ 5.5V	2.5V ~ 5.5V
Voltage - Supply, Digital	2.7V ~ 5.5V	2.7V ~ 5.5V	2.5V ~ 5.5V	2.5V ~ 5.5V	2.5V ~ 5.5V	2.5V ~ 5.5V	2.5V ~ 5.5V
INL/DNL (LSB)	±1, ±1	±1, ±1	±1, -1/+2	±1, -1/+2	±1, -1/+2	±0.5, ±1	±0.5, ±1
Architecture	R-2R	R-2R	R-2R	R-2R	R-2R	R-2R	R-2R
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Package / Case	10-TFSOP, 10-MSOP	10-TFSOP, 10-MSOP	10-TFSOP, 10-MSOP	10-TFSOP, 10-MSOP	10-TFSOP, 10-MSOP	10-TFSOP, 10-MSOP	10-TFSOP, 10-MSOP
Mounting Type	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
Moisture Sensitivity Level (MSL)	2 (1 Year)	2 (1 Year)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

All substitute parts maintain Active product status with ROHS3 compliance and REACH unaffected designation, ensuring regulatory alignment with the original DAC7811IDGS.

DAC7811IDGSR provides direct functional equivalence with identical electrical specifications and operating parameters. This part differs only in packaging format (Cut Tape & Digi-Reel versus Tube), making it suitable for high-volume production environments requiring reel-based component handling.

AD5443 Series (AD5443YRMZ, AD5443YRMZ-REEL, AD5443YRMZ-REEL7) offers improved settling time performance at 160ns versus 200ns baseline, with extended data interface support including DSP protocol. Supply voltage minimum extends to 2.5V. Moisture sensitivity improves to MSL 1 (Unlimited). These devices are functionally compatible with identical 12-bit resolution, single-channel configuration, and R-2R architecture.

AD5444 Series (AD5444YRMZ, AD5444YRMZ-REEL7) delivers superior performance with 110ns settling time and tighter INL specification (±0.5 LSB maximum). These devices maintain full functional compatibility while providing enhanced linearity and speed characteristics. MSL rating improves to 1 (Unlimited).

Selection between substitute options depends on application requirements for settling time performance, supply voltage constraints, and packaging format needs. All parts support identical SPI-based control protocols and external reference configuration.

Frequently Asked Questions (FAQ)

Q: Can AD5443YRMZ replace DAC7811IDGS in existing designs?

A: Yes. Both devices share 12-bit resolution, single-channel current output, differential output capability, R-2R architecture, and identical operating temperature range. The AD5443YRMZ provides faster settling time (160ns versus 200ns) and lower minimum supply voltage (2.5V versus 2.7V). SPI interface compatibility is maintained. Physical package dimensions match (10-MSOP, 0.118" width, 3.00mm). Pin-level compatibility requires verification against specific board layout and reference circuit implementation.

Q: What is the difference between AD5443YRMZ and AD5444YRMZ?

A: Both devices are 12-bit single-channel DACs with identical core functionality. The AD5444YRMZ provides superior performance specifications: settling time of 110ns (versus 160ns for AD5443YRMZ) and tighter INL tolerance of ±0.5 LSB maximum (versus ±1 LSB for AD5443YRMZ). Both support SPI and DSP interfaces, operate across -40°C to 125°C, and feature MSL 1 (Unlimited) moisture sensitivity rating. Selection depends on application requirements for conversion speed and linearity precision.

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

A: Yes. Packaging format differences (DAC7811IDGS in Tube, DAC7811IDGSR in Cut Tape & Digi-Reel, AD5443YRMZ-REEL variants) represent only supply chain and handling variations. Electrical specifications, performance characteristics, and functional operation remain identical across all packaging options for a given part number base. Selection is driven by manufacturing process requirements and component procurement logistics.

Q: What supply voltage range applies when substituting parts?

A: The DAC7811IDGS operates at 2.7V to 5.5V for both analog and digital supplies. Substitute parts from Analog Devices (AD5443, AD5444 series) extend the minimum to 2.5V while maintaining 5.5V maximum. Designs operating above 2.5V are compatible with all substitute options. Designs requiring operation below 2.7V are limited to Analog Devices alternatives. Verify specific supply voltage requirements in application schematics before part selection.

Q: Do substitute parts require different reference circuit design?

A: No. All substitute parts maintain external reference type configuration identical to DAC7811IDGS. Reference circuit topology, component values, and biasing requirements remain unchanged. SPI control protocol and timing specifications are compatible across all listed substitutes.

Q: What is the significance of MSL rating differences?

A: Moisture Sensitivity Level (MSL) indicates component sensitivity to moisture absorption during storage and handling. DAC7811IDGS carries MSL 2 (1 Year maximum shelf life under controlled conditions). Analog Devices substitutes carry MSL 1 (Unlimited shelf life), providing extended storage capability and reduced risk of moisture-related failures during extended inventory periods. This represents an improvement in component reliability and supply chain flexibility.

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