ADS8519IBDBG4 Equivalent & Substitute Parts

Part Overview

The ADS8519IBDBG4 is a 16-bit Analog-to-Digital Converter (ADC) manufactured by Texas Instruments, designed for single-ended input data acquisition applications. This SAR (Successive Approximation Register) architecture device operates at 250k samples per second with SPI digital interface compatibility. The part is currently discontinued at DiGi Electronics, necessitating identification of equivalent alternatives that maintain functional and electrical compatibility for ongoing system support and new designs.

Key Parameters

Parameter	Value
Resolution (Bits)	16
Sampling Rate	250k samples/second
Number of Inputs	1
Input Type	Single Ended
Digital Interface	SPI
Architecture	SAR
Reference Type	External, Internal
Analog Supply Voltage	5V
Digital Supply Voltage	1.65V ~ 5.25V
Operating Temperature Range	-40°C ~ 85°C
Package	28-SSOP (0.209", 5.30mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the ADS8519IBDBG4 is determined by strict equivalence across the following critical parameters: 16-bit resolution, single-ended input configuration, SPI digital interface, SAR architecture, external and internal reference capability, 5V analog supply, and 28-SSOP package form factor. Substitute parts must maintain these core specifications to ensure direct functional replacement without circuit redesign.

The substitute parts are categorized as follows:

MFR Recommended Substitutes: Parts that match all critical electrical and mechanical parameters with active product status and verified availability.

Parametric Equivalents: Parts that satisfy all functional requirements but may differ in secondary characteristics such as packaging designation or inventory status.

Parameter Comparison

Parameter	ADS8519IBDBG4	ADS8519IBDB	ADS8519IDB	LTC1609CG#PBF
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	Analog Devices Inc.
Resolution (Bits)	16	16	16	16
Sampling Rate	250k	250k	250k	200k
Number of Inputs	1	1	1	1
Input Type	Single Ended	Single Ended	Single Ended	Single Ended
Digital Interface	SPI	SPI	SPI	SPI
Architecture	SAR	SAR	SAR	SAR
Reference Type	External, Internal	External, Internal	External, Internal	External, Internal
Analog Supply Voltage	5V	5V	5V	5V
Digital Supply Voltage	1.65V ~ 5.25V	1.65V ~ 5.25V	1.65V ~ 5.25V	5V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	0°C ~ 70°C
Package	28-SSOP	28-SSOP	28-SSOP	28-SSOP
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Discontinued	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitute: ADS8519IBDB

The ADS8519IBDB is the recommended direct replacement for the discontinued ADS8519IBDBG4. This part maintains identical electrical specifications, including 16-bit resolution, 250k sampling rate, and full digital supply voltage range (1.65V ~ 5.25V). The device carries active product status with verified inventory availability and ROHS3 compliance. The only distinction is packaging designation (Tube vs. unspecified), which does not affect functional performance or pin compatibility.

Secondary Substitute: ADS8519IDB

The ADS8519IDB provides parametric equivalence with identical core specifications and active product status. This part satisfies all functional requirements for direct circuit substitution with confirmed availability and ROHS3 compliance.

Alternative Substitute: LTC1609CG#PBF

The LTC1609CG#PBF from Analog Devices Inc. offers functional compatibility with the same 16-bit resolution, single-ended input, SPI interface, and 28-SSOP package. This device operates at 200k sampling rate (lower than the original 250k) and restricts digital supply voltage to 5V nominal operation. The operating temperature range is narrower (0°C ~ 70°C vs. -40°C ~ 85°C). This substitute is suitable for applications where the reduced sampling rate and temperature range do not conflict with system requirements. The part maintains active status and ROHS3 compliance with high inventory availability.

Frequently Asked Questions (FAQ)

Q: Can the ADS8519IBDB directly replace the ADS8519IBDBG4 without circuit modification?

A: Yes. The ADS8519IBDB maintains identical electrical specifications, pin configuration, and 28-SSOP package form factor. No circuit redesign is required for direct substitution.

Q: What is the difference between ADS8519IBDB and ADS8519IDB?

A: Both parts are parametrically equivalent with identical electrical specifications and active product status. The primary difference is packaging designation. Both are suitable for direct replacement.

Q: Why does the LTC1609CG#PBF have a lower sampling rate?

A: The LTC1609CG#PBF operates at 200k samples per second compared to the original 250k. This specification difference is inherent to the Analog Devices device architecture. Applications requiring the full 250k sampling rate should use the ADS8519IBDB or ADS8519IDB.

Q: Is the LTC1609CG#PBF suitable for extended temperature applications?

A: No. The LTC1609CG#PBF operates over 0°C ~ 70°C, which is narrower than the original -40°C ~ 85°C range. For applications requiring extended temperature operation, use the ADS8519IBDB or ADS8519IDB.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance, matching the original ADS8519IBDBG4 certification status.

Q: What is the digital supply voltage requirement for each substitute?

A: The ADS8519IBDB and ADS8519IDB support 1.65V ~ 5.25V digital supply voltage. The LTC1609CG#PBF requires 5V nominal digital supply. Verify your circuit design supports the applicable voltage range for your selected substitute.

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