ADS1244IDGSTG4 Equivalent & Substitute Parts

Part Overview

The ADS1244IDGSTG4 is a 24-bit Sigma-Delta analog-to-digital converter manufactured by Texas Instruments, designed for single-input data acquisition applications. It features differential and single-ended input capability, SPI data interface, and operates across analog supply voltages of 2.5V to 5.25V with digital supply from 1.8V to 3.6V. The part is packaged in a 10-VSSOP surface mount configuration with a 15 samples-per-second sampling rate.

This part has been discontinued at DiGi Electronics. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure component availability, and support ongoing production or repair requirements.

Key Parameters

Parameter	Value
Number of Bits	24
Sampling Rate (Per Second)	15
Number of Inputs	1
Input Type	Differential, Single Ended
Data Interface	SPI
Architecture	Sigma-Delta
Reference Type	External
Voltage - Supply, Analog	2.5V ~ 5.25V
Voltage - Supply, Digital	1.8V ~ 3.6V
Operating Temperature	-40°C ~ 85°C
Package / Case	10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
Supplier Device Package	10-VSSOP
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	2 (1 Year)

Substitute Part Grouping Explanation

Substitution eligibility for the ADS1244IDGSTG4 is determined by strict equivalence across the following critical parameters:

24-bit resolution
15 samples-per-second sampling rate
Single input channel
Differential and single-ended input capability
SPI data interface
Sigma-Delta architecture
External reference type
Analog supply range: 2.5V to 5.25V
Digital supply range: 1.8V to 3.6V
Operating temperature range: -40°C to 85°C
10-VSSOP package configuration
Surface mount mounting type
ROHS3 compliance
MSL rating of 2 (1 Year)

All identified substitute parts maintain these parameters without deviation. Substitutes differ only in product status (active versus discontinued) and packaging format (Cut Tape & Digi-Reel versus standard supplier packaging).

Parameter Comparison

Parameter	ADS1244IDGSTG4	ADS1244IDGST	ADS1244IDGSR	ADS1245IDGST
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Number of Bits	24	24	24	24
Sampling Rate (Per Second)	15	15	15	15
Number of Inputs	1	1	1	1
Input Type	Differential, Single Ended	Differential, Single Ended	Differential, Single Ended	Differential, Single Ended
Data Interface	SPI	SPI	SPI	SPI
Architecture	Sigma-Delta	Sigma-Delta	Sigma-Delta	Sigma-Delta
Reference Type	External	External	External	External
Voltage - Supply, Analog	2.5V ~ 5.25V	2.5V ~ 5.25V	2.5V ~ 5.25V	2.5V ~ 5.25V
Voltage - Supply, Digital	1.8V ~ 3.6V	1.8V ~ 3.6V	1.8V ~ 3.6V	1.8V ~ 3.6V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	10-TFSOP, 10-MSOP (0.118", 3.00mm Width)	10-TFSOP, 10-MSOP (0.118", 3.00mm Width)	10-TFSOP, 10-MSOP (0.118", 3.00mm Width)	10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
Supplier Device Package	10-VSSOP	10-VSSOP	10-VSSOP	10-VSSOP
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	2 (1 Year)	2 (1 Year)	2 (1 Year)	2 (1 Year)
Product Status	Discontinued at DiGi Electronics	Active	Active	Active

Engineering Selection Recommendations

ADS1244IDGST is the manufacturer-recommended substitute. This part maintains full parametric equivalence to the ADS1244IDGSTG4 and carries active product status with current availability. It is supplied in Cut Tape and Digi-Reel packaging formats, supporting both prototype and production volume requirements. ROHS3 compliance and MSL rating are identical.

ADS1244IDGSR is a parametric equivalent with active product status. This part provides the highest current inventory (10,102 pieces) and maintains all electrical and mechanical specifications. It is suitable for applications requiring immediate availability and long-term supply assurance.

ADS1245IDGST is a parametric equivalent with active product status. This part differs only in base product number (ADS1245 versus ADS1244) while maintaining identical electrical performance, package configuration, and compliance certifications. It is available in active production with 1,900 pieces in stock.

All three substitute parts are ROHS3 compliant and carry MSL rating 2 (1 Year), meeting the same environmental and handling requirements as the original part.

Frequently Asked Questions (FAQ)

Q: Can ADS1244IDGST be used as a direct replacement for ADS1244IDGSTG4?

A: Yes. ADS1244IDGST is the manufacturer-recommended substitute and maintains identical electrical specifications, package configuration, and compliance ratings. The only differences are product status (active versus discontinued) and packaging format (Cut Tape & Digi-Reel).

Q: What is the difference between ADS1244IDGSR and ADS1244IDGST?

A: Both parts are parametric equivalents with identical electrical and mechanical specifications. The difference is in packaging format and inventory availability. ADS1244IDGSR has significantly higher stock levels (10,102 pieces).

Q: Why is ADS1245IDGST listed as a substitute if it has a different base product number?

A: ADS1245IDGST maintains all critical electrical parameters, package configuration, supply voltage ranges, sampling rate, resolution, and interface specifications. The base product number difference does not affect functional equivalence for this application.

Q: Are all substitute parts available in the same 10-VSSOP package?

A: Yes. All substitute parts use the 10-VSSOP supplier device package with 10-TFSOP and 10-MSOP case configurations, ensuring mechanical and electrical compatibility with existing PCB designs.

Q: Do the substitute parts have the same moisture sensitivity rating?

A: Yes. All substitute parts carry MSL rating 2 (1 Year), identical to the original ADS1244IDGSTG4. Handling and storage requirements remain unchanged.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts maintain ROHS3 compliance, meeting the same environmental and regulatory requirements as the discontinued original part.

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