AD7623ASTZRL Equivalent & Substitute Parts

Part Overview

The AD7623ASTZRL is a 16-bit Analog-to-Digital Converter (ADC) manufactured by Analog Devices Inc., part of the PulSAR® series. This device features a single differential input with a 1.33 MHz sampling rate and operates with a SAR (Successive Approximation Register) architecture. The part is currently listed as obsolete, making identification of suitable equivalent and substitute components essential for ongoing design support and production continuity.

Substiute Parts

AD7623ASTZRL

Analog Devices Inc.In Stock: 975AD7623ASTZRL Datasheet

Current PartRFQ

AD7623ASTZ

Analog Devices Inc.In Stock: 1441AD7623ASTZ Datasheet

DirectRFQ

AD7985BCPZ

Analog Devices Inc.In Stock: 2450AD7985BCPZ Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the AD7623ASTZRL is determined by the following critical parameters:

Direct Equivalent Criteria:

• Resolution: 16 bits
• Architecture: SAR
• Number of Inputs: 1
• Supply Voltage Range: 2.37V ~ 2.63V (or compatible range)
• Operating Temperature: -40°C ~ 85°C
• Manufacturer: Analog Devices Inc.
• Series: PulSAR®

Substitution Logic:

The AD7623ASTZ qualifies as a direct equivalent. It maintains identical electrical specifications (16-bit resolution, 1.33 MHz sampling rate, differential input, SAR architecture, and supply voltage range) and is housed in the same 48-LQFP package. The primary difference is packaging format (Tray vs. Tape/Reel) and product status (Active vs. Obsolete). This part is suitable for direct replacement without circuit modification.

The AD7985BCPZ qualifies as a similar substitute with design considerations. While it maintains the same 16-bit resolution, SAR architecture, and PulSAR® series designation, it differs in the following parameters: higher sampling rate (2.5M vs. 1.33M), input type (Pseudo-Differential vs. Differential), data interface (SPI, DSP only vs. SPI, Parallel, DSP), package format (20-LFCSP vs. 48-LQFP), and supply voltage range (2.375V ~ 2.625V vs. 2.37V ~ 2.63V). Selection of this part requires circuit redesign to accommodate the different package and input configuration.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (No Circuit Modification Required):

The AD7623ASTZ is the recommended substitute for the obsolete AD7623ASTZRL. Both parts share identical electrical specifications, resolution, sampling rate, input configuration, and package format. The AD7623ASTZ is currently in active production status with ROHS3 compliance and REACH unaffected certification, ensuring long-term availability and regulatory compliance. The only difference is packaging format (Tray), which does not affect electrical performance or circuit integration.

For Design Flexibility (Circuit Modification Required):

The AD7985BCPZ may be selected when higher sampling rate (2.5M vs. 1.33M) is beneficial and circuit redesign is feasible. This part requires accommodation of a different package format (20-LFCSP vs. 48-LQFP), modified input configuration (Pseudo-Differential vs. Differential), and reduced parallel interface support (SPI and DSP only). The AD7985BCPZ is also in active production with ROHS3 compliance and REACH unaffected certification.

Frequently Asked Questions (FAQ)

Q: Can AD7623ASTZ be used as a direct drop-in replacement for AD7623ASTZRL?

A: Yes. The AD7623ASTZ is electrically and functionally identical to the AD7623ASTZRL. Both parts feature 16-bit resolution, 1.33 MHz sampling rate, differential input configuration, SAR architecture, and 48-LQFP packaging. The primary difference is packaging format (Tray vs. Tape/Reel) and product status (Active vs. Obsolete). No circuit modification is required.

Q: What are the key differences between AD7623ASTZ and AD7985BCPZ?

A: The AD7985BCPZ differs in four critical areas: (1) Sampling Rate is higher at 2.5M compared to 1.33M; (2) Input Type is Pseudo-Differential instead of Differential; (3) Data Interface supports SPI and DSP only, excluding Parallel interface; (4) Package is 20-LFCSP (4x4) instead of 48-LQFP (7x7). These differences require circuit redesign if substitution is considered.

Q: Is the AD7985BCPZ suitable for applications requiring parallel interface support?

A: No. The AD7985BCPZ supports SPI and DSP interfaces only. If your application requires parallel interface capability, the AD7623ASTZ is the appropriate choice, as it supports SPI, Parallel, and DSP interfaces.

Q: What is the impact of the different package formats on PCB design?

A: The AD7623ASTZ uses 48-LQFP (7x7) packaging, identical to the original part. The AD7985BCPZ uses 20-LFCSP (4x4) packaging, which is significantly smaller and requires different PCB footprint design, trace routing, and thermal management considerations.

Q: Are both substitute parts RoHS and REACH compliant?

A: Yes. Both AD7623ASTZ and AD7985BCPZ are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What is the moisture sensitivity level for these parts?

A: All three parts (AD7623ASTZRL, AD7623ASTZ, and AD7985BCPZ) have a Moisture Sensitivity Level (MSL) of 3 with a 168-hour floor life rating. Standard moisture control procedures during storage and handling are required.