ADS7806UG4 Equivalent & Substitute Parts

Part Overview

The ADS7806UG4 is a 12-bit Analog to Digital Converter (ADC) manufactured by Texas Instruments, configured as a single-input SAR (Successive Approximation Register) architecture device in a 28-SOIC surface mount package. This component operates with 5V analog and digital supply voltages, supports both SPI and parallel data interfaces, and achieves a 40 kHz sampling rate with external or internal reference capability.

The ADS7806UG4 is classified as Obsolete. Locating equivalent or substitute components is necessary to support legacy system maintenance, design updates, or when original inventory becomes unavailable.

Key Parameters

Parameter	Value
Resolution (Bits)	12
Sampling Rate	40 kHz
Number of Inputs	1
Input Type	Single Ended
Data Interface	SPI, Parallel
Architecture	SAR
Configuration	S/H-ADC
Reference Type	External, Internal
Analog Supply Voltage	5V
Digital Supply Voltage	5V
Operating Temperature Range	-40°C to 85°C
Package Type	28-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the ADS7806UG4 is determined by strict equivalence across the following critical parameters:

12-bit resolution
40 kHz sampling rate
Single-ended input configuration
SPI and parallel data interface support
SAR architecture with S/H-ADC configuration
External and internal reference capability
5V analog and digital supply voltages
-40°C to 85°C operating temperature range
28-SOIC package footprint and surface mount compatibility
ROHS3 compliance and REACH unaffected status

All substitute parts listed maintain these electrical and mechanical specifications, ensuring functional and physical compatibility within the original design constraints.

Parameter Comparison

Parameter	ADS7806UG4 (Main)	ADS7806UB (MFR Recommended)	ADS8506IBDW (Parametric Equivalent)
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments
Resolution (Bits)	12	12	12
Sampling Rate (kHz)	40	40	40
Number of Inputs	1	1	1
Input Type	Single Ended	Single Ended	Single Ended
Data Interface	SPI, Parallel	SPI, Parallel	SPI, Parallel
Architecture	SAR	SAR	SAR
Configuration	S/H-ADC	S/H-ADC	S/H-ADC
Reference Type	External, Internal	External, Internal	External, Internal
Analog Supply Voltage	5V	5V	5V
Digital Supply Voltage	5V	5V	5V
Operating Temperature	-40°C to 85°C	-40°C to 85°C	-40°C to 85°C
Package / Case	28-SOIC (0.295", 7.50mm Width)	28-SOIC (0.295", 7.50mm Width)	28-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Last Time Buy	Active
Moisture Sensitivity Level (MSL)	3 (168 Hours)	3 (168 Hours)	2 (1 Year)

Engineering Selection Recommendations

ADS7806UB (MFR Recommended Substitute)

The ADS7806UB is the manufacturer-recommended alternative to the obsolete ADS7806UG4. This part maintains identical electrical specifications and 28-SOIC package compatibility. The ADS7806UB carries Last Time Buy status, indicating limited future availability. Selection of this part is appropriate for designs requiring direct compatibility with existing ADS7806 series implementations. Moisture sensitivity level remains at MSL 3 (168 hours), matching the original component.

ADS8506IBDW (Parametric Equivalent)

The ADS8506IBDW provides full parametric equivalence to the ADS7806UG4 across all critical electrical and mechanical specifications. This part is classified as Active, ensuring long-term availability and supply chain stability. The ADS8506IBDW offers improved moisture sensitivity performance at MSL 2 (1 Year), providing enhanced reliability in storage and handling. This part is supplied in Tube packaging. Selection of this part is appropriate for new designs or legacy system updates where extended component availability is a priority.

Both substitute parts satisfy ROHS3 compliance and REACH unaffected status requirements.

Frequently Asked Questions (FAQ)

Q: Can the ADS7806UB or ADS8506IBDW be used as direct replacements for the ADS7806UG4?

A: Yes. Both substitute parts maintain identical electrical specifications (12-bit resolution, 40 kHz sampling rate, single-ended input, SPI/parallel interface, 5V supply, -40°C to 85°C operating range) and are packaged in the same 28-SOIC footprint. No circuit modifications are required for functional substitution.

Q: What is the difference between the ADS7806UB and ADS8506IBDW?

A: Both parts are electrically and mechanically equivalent. The primary differences are product status and moisture sensitivity. The ADS7806UB is Last Time Buy status with MSL 3 (168 hours). The ADS8506IBDW is Active status with improved MSL 2 (1 Year) and is supplied in Tube packaging. The ADS8506IBDW is recommended for applications requiring extended component availability.

Q: Are there any package or pinout differences between these parts?

A: No. All three parts use the 28-SOIC package with identical 0.295" width (7.50mm). Pinout and footprint compatibility is guaranteed.

Q: What does MSL (Moisture Sensitivity Level) mean for component selection?

A: MSL indicates the maximum time a component can be exposed to ambient conditions (typically 30°C, 85% relative humidity) before baking is required. MSL 3 allows 168 hours; MSL 2 allows 1 year. The ADS8506IBDW's MSL 2 rating provides longer shelf life and reduced handling risk in humid environments.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. The ADS7806UG4, ADS7806UB, and ADS8506IBDW are all ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

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