THS1040IDW Equivalent & Substitute Parts

Part Overview

The THS1040IDW is a 10-bit pipelined analog-to-digital converter manufactured by Texas Instruments, designed for single-channel data acquisition applications. It features a 40 MHz sampling rate with both differential and single-ended input capabilities, operating from 3V to 3.6V supply voltage. The device is classified as obsolete, making identification of compatible substitute parts essential for ongoing system support and new design implementations.

Key Parameters

Parameter	Value
Manufacturer Part Number	THS1040IDW
Manufacturer	Texas Instruments
Number of Bits	10
Sampling Rate	40 MHz
Number of Inputs	1
Input Type	Differential, Single Ended
Architecture	Pipelined
Data Interface	Parallel
Voltage - Supply, Analog	3V ~ 3.6V
Voltage - Supply, Digital	3V ~ 3.6V
Operating Temperature	-40°C ~ 85°C
Package / Case	28-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the THS1040IDW is determined by strict equivalence across core functional and electrical parameters. The following criteria establish valid substitution:

Core Functional Parameters (Must Match):

Resolution: 10 bits
Sampling Rate: 40 MHz
Number of Inputs: 1
Input Type: Differential and Single Ended capability
Architecture: Pipelined
Data Interface: Parallel

Electrical Parameters (Must Be Compatible):

Analog Supply Voltage: Substitute must support the 3V ~ 3.6V range
Digital Supply Voltage: Substitute must support the 3V ~ 3.6V range
Operating Temperature: -40°C ~ 85°C

Mechanical & Compliance Parameters:

Mounting Type: Surface Mount
RoHS Compliance: ROHS3 Compliant
REACH Status: REACH Unaffected

Package form factor may differ (SOIC vs. TSSOP) provided all electrical and functional specifications remain compatible.

Parameter Comparison

Parameter	THS1040IDW	ADC10040CIMTX/NOPB	Compatibility
Manufacturer	Texas Instruments	Texas Instruments	Match
Number of Bits	10	10	Match
Sampling Rate (MHz)	40	40	Match
Number of Inputs	1	1	Match
Input Type	Differential, Single Ended	Differential, Single Ended	Match
Architecture	Pipelined	Pipelined	Match
Data Interface	Parallel	Parallel	Match
Voltage - Supply, Analog	3V ~ 3.6V	2.7V ~ 3.6V	Compatible (wider range)
Voltage - Supply, Digital	3V ~ 3.6V	2.5V ~ 3.6V	Compatible (wider range)
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	Match
Package / Case	28-SOIC	28-TSSOP	Different (PCB layout adjustment required)
Mounting Type	Surface Mount	Surface Mount	Match
Product Status	Obsolete	Active	Substitute is active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Match
MSL Rating	1 (Unlimited)	3 (168 Hours)	Substitute has stricter MSL requirement

Engineering Selection Recommendations

The ADC10040CIMTX/NOPB is the manufacturer-recommended substitute for the obsolete THS1040IDW. Both devices are manufactured by Texas Instruments and maintain identical functional specifications across resolution, sampling rate, input configuration, and architecture.

Compliance & Status Advantages:

ADC10040CIMTX/NOPB carries Active product status, ensuring long-term availability and support
Both devices maintain ROHS3 compliance and REACH unaffected status
The substitute features expanded supply voltage ranges (2.7V ~ 3.6V analog, 2.5V ~ 3.6V digital), providing greater design flexibility while remaining compatible with the original 3V ~ 3.6V specification

Implementation Considerations:

Package transition from 28-SOIC to 28-TSSOP requires PCB footprint modification
MSL rating increases from Level 1 to Level 3, requiring adherence to 168-hour moisture exposure limits during storage and handling
All electrical and functional parameters remain equivalent, supporting direct functional replacement

Frequently Asked Questions (FAQ)

Q: Can ADC10040CIMTX/NOPB be used as a direct pin-for-pin replacement?

A: The ADC10040CIMTX/NOPB is functionally equivalent but uses a different package (28-TSSOP vs. 28-SOIC). Pin assignments are identical, but PCB footprint redesign is required. The devices are not physically interchangeable on existing boards without layout modification.

Q: What are the key differences between THS1040IDW and ADC10040CIMTX/NOPB?

A: The primary differences are package form factor (SOIC vs. TSSOP) and product status (Obsolete vs. Active). The ADC10040CIMTX/NOPB offers wider supply voltage ranges and is actively manufactured. All core ADC specifications—resolution, sampling rate, input types, and architecture—are identical.

Q: Does the wider supply voltage range of ADC10040CIMTX/NOPB affect compatibility?

A: No. The substitute's expanded voltage ranges (2.7V ~ 3.6V analog, 2.5V ~ 3.6V digital) are backward-compatible with the original specification (3V ~ 3.6V). Systems designed for the THS1040IDW will operate correctly with the substitute within the original voltage range.

Q: What is the significance of the MSL rating difference?

A: The THS1040IDW has MSL Level 1 (unlimited moisture exposure), while ADC10040CIMTX/NOPB has MSL Level 3 (168-hour limit). This requires stricter moisture control during component storage, handling, and assembly. Proper baking procedures must be followed if the component exceeds 168 hours of exposure to ambient humidity.

Q: Are there any other Texas Instruments substitutes for the THS1040IDW?

A: Based on the provided data, ADC10040CIMTX/NOPB is the manufacturer-recommended substitute. It is the only equivalent part listed for this device.

Q: Can the substitute be used in new designs?

A: Yes. The ADC10040CIMTX/NOPB is actively manufactured and recommended for new designs. Its Active product status ensures continued availability and support, making it the preferred choice for both legacy system support and new applications.

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