ADS5553IPFPR Equivalent & Substitute Parts

Part Overview

The ADS5553IPFPR is a 14-bit pipelined analog-to-digital converter manufactured by Texas Instruments, designed for simultaneous dual-channel data acquisition applications. This device features differential inputs, parallel data interface, and integrated sample-and-hold functionality with a 65 MHz sampling rate. The ADS5553IPFPR is classified as obsolete, making identification of active equivalent parts essential for new designs and ongoing production requirements.

Key Parameters

Parameter	Value
Resolution (Bits)	14
Sampling Rate	65 MHz
Number of Inputs	2
Input Type	Differential
Architecture	Pipelined
Data Interface	Parallel
Number of A/D Converters	2
Configuration	S/H-ADC
Reference Type	External, Internal
Operating Temperature Range	-40°C to 85°C
Package Type	80-TQFP Exposed Pad
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the ADS5553IPFPR is determined by strict equivalence across core functional and electrical parameters. The following criteria establish valid substitution:

Core Functional Parameters (Must Match):

Resolution: 14 bits
Sampling Rate: 65 MHz
Number of Inputs: 2 channels
Input Type: Differential
Architecture: Pipelined
Number of A/D Converters: 2
Configuration: S/H-ADC with 1:1 ratio
Data Interface: Parallel
Reference Type: External and Internal support
Operating Temperature Range: -40°C to 85°C

Acceptable Variations:

Package type may differ (80-TQFP vs. 64-LFCSP) provided PCB layout accommodates the alternative footprint
Supply voltage ranges may differ if the substitute operates within the application's available voltage rails
Product status transition from obsolete to active is acceptable for ongoing production

The AD9251BCPZRL7-65 meets all core functional requirements and represents an active product alternative.

Parameter Comparison

Parameter	ADS5553IPFPR	AD9251BCPZRL7-65
Manufacturer	Texas Instruments	Analog Devices Inc.
Resolution (Bits)	14	14
Sampling Rate (MHz)	65	65
Number of Inputs	2	2
Input Type	Differential	Differential
Architecture	Pipelined	Pipelined
Data Interface	Parallel	Parallel
Number of A/D Converters	2	2
Configuration	S/H-ADC	S/H-ADC
Reference Type	External, Internal	External, Internal
Analog Supply Voltage	3.0V to 3.6V	1.7V to 1.9V
Digital Supply Voltage	3.0V to 3.6V	1.7V to 3.6V
Operating Temperature	-40°C to 85°C	-40°C to 85°C
Package / Case	80-TQFP Exposed Pad	64-VFQFN Exposed Pad, CSP
Supplier Device Package	80-HTQFP (12x12)	64-LFCSP-VQ (9x9)
Product Status	Obsolete	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	3 (168 Hours)	3 (168 Hours)

Engineering Selection Recommendations

The AD9251BCPZRL7-65 is the qualified substitute for the ADS5553IPFPR based on the following factors:

Product Status: The AD9251BCPZRL7-65 maintains active product status, ensuring continued availability and manufacturer support. The ADS5553IPFPR is obsolete, necessitating transition to an alternative.

Functional Equivalence: Both devices provide identical core specifications: 14-bit resolution, 65 MHz sampling rate, dual differential inputs, pipelined architecture, and parallel data interface. Signal processing capability and timing characteristics are equivalent.

Compliance & Certifications: Both parts maintain ROHS3 compliance and identical MSL ratings (3, 168 hours), ensuring equivalent handling and storage requirements. REACH status is unaffected for both devices.

Package Consideration: The AD9251BCPZRL7-65 uses a smaller 64-LFCSP-VQ (9x9) package compared to the 80-HTQFP (12x12) footprint of the ADS5553IPFPR. PCB layout redesign is required to accommodate the different pin count and footprint geometry.

Supply Voltage Difference: The AD9251BCPZRL7-65 requires lower analog supply voltage (1.7V to 1.9V) compared to the ADS5553IPFPR (3.0V to 3.6V). Verify that the application's power distribution architecture can supply the reduced voltage requirement for the analog domain.

Frequently Asked Questions (FAQ)

Q: Can the AD9251BCPZRL7-65 directly replace the ADS5553IPFPR without design changes?

A: Functional substitution is valid; however, physical redesign is required. The AD9251BCPZRL7-65 uses a 64-pin LFCSP package versus the 80-pin TQFP package of the ADS5553IPFPR, requiring PCB layout modification. Additionally, the reduced analog supply voltage (1.7V to 1.9V) necessitates power supply circuit adjustment.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution is based on matching resolution (14 bits), sampling rate (65 MHz), number of inputs (2 differential channels), architecture (pipelined), data interface (parallel), and operating temperature range (-40°C to 85°C). All these parameters are identical between the two devices.

Q: Are there any compliance or certification differences between these parts?

A: Both devices are ROHS3 compliant with identical MSL ratings (3, 168 hours) and unaffected REACH status. No compliance barriers exist for substitution.

Q: What is the pin count difference between these devices?

A: The ADS5553IPFPR is an 80-pin device; the AD9251BCPZRL7-65 is a 64-pin device. Pin assignment and signal routing differ, requiring schematic and PCB redesign.

Q: Does the lower supply voltage of the AD9251BCPZRL7-65 affect signal integrity?

A: The AD9251BCPZRL7-65 is designed to operate at 1.7V to 1.9V analog supply. Ensure your power distribution network can reliably deliver this voltage with appropriate filtering and regulation. Signal integrity depends on proper power supply design for the selected voltage level.

Q: Is the AD9251BCPZRL7-65 available in tape and reel packaging?

A: Yes, the AD9251BCPZRL7-65 is supplied in Tape & Reel (TR) packaging, suitable for automated assembly processes.

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