ADS8345EB/2K5 Equivalent & Substitute Parts

Part Overview

The ADS8345EB/2K5 is a 16-bit Analog to Digital Converter (ADC) manufactured by Texas Instruments, designed for data acquisition applications. This SAR (Successive Approximation Register) architecture device features 4 or 8 differential/single-ended inputs with SPI data interface and operates across dual supply voltage ranges (2.7V–3.6V and 5V). The part is currently classified as obsolete, making equivalent substitute parts necessary for ongoing production and design continuity.

Key Parameters

Parameter	Value
Resolution	16 Bit
Sampling Rate	100k Samples Per Second
Number of Inputs	4, 8
Input Type	Differential, Single Ended
Data Interface	SPI
Architecture	SAR
Reference Type	External
Voltage Supply (Analog)	2.7V–3.6V, 5V
Voltage Supply (Digital)	2.7V–3.6V, 5V
Operating Temperature	-40°C to 85°C
Package	20-SSOP (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
MSL Rating	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution for the ADS8345EB/2K5 is based on strict parametric equivalence across the following critical criteria:

Resolution & Sampling Rate: All substitutes maintain 16-bit resolution at 100k samples per second
Input Configuration: All substitutes support 4 or 8 differential/single-ended inputs
Data Interface: SPI protocol compatibility across all parts
Supply Voltage Ranges: Identical dual-supply voltage support (2.7V–3.6V and 5V)
Package & Pinout: All substitutes use 20-SSOP surface-mount package with identical mechanical dimensions
Operating Temperature: All substitutes operate within -40°C to 85°C range
Compliance: All substitutes maintain ROHS3 compliance and REACH unaffected status

The substitute parts differ only in product status (active vs. obsolete) and packaging format (Tape & Reel vs. Cut Tape & Digi-Reel), with minor variations in MSL rating and HTSUS classification that do not affect functional equivalence.

Parameter Comparison

Parameter	ADS8345EB/2K5	ADS8345E/2K5	ADS8344E/2K5	ADS8344EB/2K5
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Resolution	16 Bit	16 Bit	16 Bit	16 Bit
Sampling Rate	100k SPS	100k SPS	100k SPS	100k SPS
Number of Inputs	4, 8	4, 8	4, 8	4, 8
Input Type	Differential, Single Ended	Differential, Single Ended	Differential, Single Ended	Differential, Single Ended
Data Interface	SPI	SPI	SPI	SPI
Architecture	SAR	SAR	SAR	SAR
Reference Type	External	External	External	External
Voltage Supply (Analog)	2.7V–3.6V, 5V	2.7V–3.6V, 5V	2.7V–3.6V, 5V	2.7V–3.6V, 5V
Voltage Supply (Digital)	2.7V–3.6V, 5V	2.7V–3.6V, 5V	2.7V–3.6V, 5V	2.7V–3.6V, 5V
Operating Temperature	-40°C to 85°C	-40°C to 85°C	-40°C to 85°C	-40°C to 85°C
Package / Case	20-SSOP (0.154", 3.90mm)	20-SSOP (0.154", 3.90mm)	20-SSOP (0.154", 3.90mm)	20-SSOP (0.154", 3.90mm)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

All three substitute parts (ADS8345E/2K5, ADS8344E/2K5, ADS8344EB/2K5) are functionally equivalent to the ADS8345EB/2K5 and maintain full parametric compatibility. The primary distinction is product status: the ADS8345EB/2K5 is obsolete, while all substitutes are active products with current manufacturing support.

For new designs or production continuity, ADS8344E/2K5 and ADS8344EB/2K5 are preferred due to active product status and higher inventory availability (2876 and 7437 units respectively). ADS8345E/2K5 remains an active alternative with 2651 units in stock.

All substitutes maintain identical ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original part. Packaging format differences (Tape & Reel vs. Cut Tape & Digi-Reel) do not affect functional performance and should be selected based on assembly process requirements.

Frequently Asked Questions (FAQ)

Q: Can ADS8344E/2K5 or ADS8344EB/2K5 be used as direct replacements for ADS8345EB/2K5?

A: Yes. All three parts share identical electrical specifications, including 16-bit resolution, 100k sampling rate, SPI interface, dual supply voltage ranges, and 20-SSOP package. They are parametrically equivalent and pin-compatible.

Q: What is the difference between ADS8345E/2K5 and ADS8344E/2K5?

A: Both parts are functionally equivalent with identical electrical and mechanical specifications. The primary difference is the base product number (ADS8345 vs. ADS8344) and minor variations in MSL rating (2 vs. 3) and HTSUS classification. These differences do not affect circuit performance or compatibility.

Q: Does packaging format (Tape & Reel vs. Cut Tape & Digi-Reel) affect compatibility?

A: No. Packaging format affects only handling and assembly logistics. The electrical and mechanical specifications remain identical. Select packaging based on your assembly process requirements and volume needs.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the regulatory profile of the original ADS8345EB/2K5.

Q: Why is the ADS8345EB/2K5 marked as obsolete?

A: The original part is obsolete, but active equivalents are available. ADS8344E/2K5 and ADS8344EB/2K5 provide continued access to this functionality with current manufacturing support and higher inventory levels.

Q: Can I mix different substitute parts in the same production run?

A: Yes. All substitutes are parametrically equivalent and can be used interchangeably without circuit modification. However, for consistency and traceability, using a single part number per production batch is recommended.

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