ADS7813UG4 Equivalent & Substitute Parts

Part Overview

The ADS7813UG4 is a 16-bit Analog to Digital Converter (ADC) manufactured by Texas Instruments, designed for single-ended input data acquisition applications. It features a Successive Approximation Register (SAR) architecture with a 40 kSPS sampling rate and operates on 5V supply voltage for both analog and digital domains. The device is packaged in a 16-SOIC surface mount package.

The ADS7813UG4 is classified as Obsolete, which necessitates identification of equivalent substitute parts for new designs or production continuity. Substitute parts must maintain identical electrical specifications, package compatibility, and interface characteristics to ensure direct replacement capability without circuit redesign.

Key Parameters

Parameter	Value
Resolution	16 Bits
Sampling Rate	40 kSPS
Number of Inputs	1
Input Type	Single Ended
Data Interface	SPI
Architecture	SAR
Reference Type	External, Internal
Analog Supply Voltage	5V
Digital Supply Voltage	5V
Operating Temperature Range	-40°C to 85°C
Package	16-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitute parts for the ADS7813UG4 are qualified based on strict electrical and mechanical parameter matching:

Critical Substitution Parameters:

Resolution: 16 bits
Sampling Rate: 40 kSPS
Input Configuration: 1 single-ended input
Data Interface: SPI protocol
Architecture: SAR topology
Reference Options: External and Internal reference support
Supply Voltages: 5V analog and digital
Operating Temperature: -40°C to 85°C
Package: 16-SOIC form factor
Mounting: Surface mount

All identified substitute parts maintain these specifications identically, ensuring functional and mechanical compatibility. Variations in product status and moisture sensitivity level do not affect electrical substitutability.

Parameter Comparison

Parameter	ADS7813UG4	ADS7813U	ADS8513IBDW	ADS8513IDW
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Resolution (Bits)	16	16	16	16
Sampling Rate (kSPS)	40	40	40	40
Number of Inputs	1	1	1	1
Input Type	Single Ended	Single Ended	Single Ended	Single Ended
Data Interface	SPI	SPI	SPI	SPI
Architecture	SAR	SAR	SAR	SAR
Reference Type	External, Internal	External, Internal	External, Internal	External, Internal
Analog Supply (V)	5	5	5	5
Digital Supply (V)	5	5	5	5
Operating Temperature (°C)	-40 to 85	-40 to 85	-40 to 85	-40 to 85
Package	16-SOIC	16-SOIC	16-SOIC	16-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

ADS7813U is the manufacturer-recommended substitute for the obsolete ADS7813UG4. This part maintains identical electrical and mechanical specifications while offering Last Time Buy product status, providing extended availability for transition planning.

ADS8513IBDW and ADS8513IDW are parametric equivalents classified as Active products. These parts provide long-term availability and production continuity. The ADS8513IBDW features Moisture Sensitivity Level (MSL) 2 (1 Year), while the ADS8513IDW also maintains MSL 2 (1 Year), both superior to the original ADS7813UG4 MSL 3 (168 Hours). All three substitute options are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.

For new designs or production requiring extended component lifecycle, ADS8513IBDW or ADS8513IDW are preferred due to Active product status. For existing designs requiring immediate replacement of ADS7813UG4, ADS7813U provides direct compatibility with minimal transition risk.

Frequently Asked Questions (FAQ)

Q: Can ADS7813U, ADS8513IBDW, and ADS8513IDW be used interchangeably with ADS7813UG4?

A: Yes. All substitute parts maintain identical electrical specifications including 16-bit resolution, 40 kSPS sampling rate, single-ended input configuration, SPI interface, and 5V supply requirements. The 16-SOIC package and surface mount characteristics are identical, enabling direct board-level substitution without circuit modification.

Q: What is the difference between ADS8513IBDW and ADS8513IDW?

A: Both parts are parametric equivalents with identical electrical and mechanical specifications. The primary difference is product status and availability. Both maintain Active product status and MSL 2 (1 Year) moisture sensitivity rating. Selection between these parts should be based on supplier availability and lead time requirements.

Q: Why is ADS7813UG4 classified as Obsolete?

A: Obsolete classification indicates the manufacturer has discontinued production. Substitute parts ensure design continuity and production capability for applications currently using ADS7813UG4.

Q: Are there any compliance differences between the main part and substitutes?

A: All parts are ROHS3 compliant and REACH unaffected. ADS8513IBDW and ADS8513IDW offer improved moisture sensitivity ratings (MSL 2, 1 Year) compared to ADS7813UG4 (MSL 3, 168 Hours), providing enhanced reliability in humid storage and operational environments.

Q: What is the SPI interface compatibility?

A: All parts implement identical SPI data interface protocols. Existing firmware and software implementations for ADS7813UG4 require no modification for substitute parts.

Q: Can these parts operate at supply voltages other than 5V?

A: No. All parts are specified for 5V analog and digital supply voltages. Operation outside this specification is not supported.

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