AD7922ARMZ Equivalent & Substitute Parts

Part Overview

The AD7922ARMZ is a 12-bit Analog-to-Digital Converter (ADC) manufactured by Analog Devices Inc., designed for data acquisition applications requiring dual-channel single-ended input conversion. The device operates at a 1 MSPS sampling rate with a SAR (Successive Approximation Register) architecture and supports both SPI and DSP data interfaces. The part is currently in active production status with 2390 units available in stock. Finding equivalent or substitute parts may be necessary due to supply constraints, packaging preferences, or application-specific requirements such as extended temperature ranges or alternative reference configurations.

Substiute Parts

AD7922ARMZ

Analog Devices Inc.In Stock: 2409AD7922ARMZ Datasheet

Current PartRFQ

AD7091R-2BRUZ

Analog Devices Inc.In Stock: 3200AD7091R-2BRUZ Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The AD7091R-2BRUZ qualifies as a substitute for the AD7922ARMZ based on the following core electrical and mechanical parameters:

Matching Parameters:

• Resolution: 12-bit ADC
• Sampling Rate: 1 MSPS
• Number of Inputs: 2 channels
• Input Configuration: Single-ended
• Data Interface: SPI and DSP support
• Architecture: SAR-based conversion
• Manufacturer: Analog Devices Inc.
• RoHS Compliance: ROHS3 Compliant
• Mounting Type: Surface Mount
• Supply Voltage Ranges: Compatible within specified operating windows

Differences Requiring Evaluation:

• Package Type: AD7922ARMZ uses 8-MSOP; AD7091R-2BRUZ uses 16-TSSOP
• Reference Configuration: AD7922ARMZ uses supply reference only; AD7091R-2BRUZ supports both external and internal reference options
• Operating Temperature Range: AD7922ARMZ operates -40°C to 85°C; AD7091R-2BRUZ operates -40°C to 125°C
• Configuration Architecture: AD7922ARMZ uses MUX-S/H-ADC; AD7091R-2BRUZ uses S/H-ADC

Parameter Comparison

Engineering Selection Recommendations

Both the AD7922ARMZ and AD7091R-2BRUZ are active products from Analog Devices Inc. with ROHS3 compliance and REACH unaffected status, making them suitable for regulated applications. The AD7091R-2BRUZ offers an extended operating temperature range (-40°C to 125°C versus -40°C to 85°C) and lower minimum supply voltage thresholds (2.09V versus 2.35V), providing broader environmental compatibility. However, the package footprint differs significantly: the AD7922ARMZ occupies a smaller 8-MSOP form factor, while the AD7091R-2BRUZ requires a 16-TSSOP package. PCB layout and space constraints must be evaluated when considering substitution. The AD7091R-2BRUZ also provides flexible reference options (external or internal), whereas the AD7922ARMZ operates with supply-based reference only. Selection should be based on specific application requirements regarding temperature range, supply voltage margins, available PCB real estate, and reference configuration needs.

Frequently Asked Questions (FAQ)

Q: Can the AD7091R-2BRUZ directly replace the AD7922ARMZ on an existing PCB?

A: Direct PCB replacement is not possible due to different package types. The AD7922ARMZ uses an 8-MSOP package while the AD7091R-2BRUZ uses a 16-TSSOP package. PCB redesign and re-layout are required for substitution.

Q: What are the key electrical differences between these two parts?

A: Both devices share identical resolution (12-bit), sampling rate (1 MSPS), input count (2 channels), and data interface support (SPI/DSP). The AD7091R-2BRUZ supports lower minimum supply voltages (2.09V versus 2.35V) and an extended operating temperature range up to 125°C. Additionally, the AD7091R-2BRUZ offers configurable reference options (external or internal), while the AD7922ARMZ uses only supply-based reference.

Q: Are both parts suitable for industrial temperature applications?

A: The AD7922ARMZ operates from -40°C to 85°C. The AD7091R-2BRUZ extends this range to -40°C to 125°C, making it more suitable for high-temperature industrial environments. Application temperature requirements should determine which part is appropriate.

Q: Do both parts support the same communication protocols?

A: Yes, both the AD7922ARMZ and AD7091R-2BRUZ support SPI and DSP data interfaces, ensuring software compatibility at the communication level.

Q: What supply voltage flexibility does each part offer?

A: The AD7922ARMZ operates with analog and digital supplies from 2.35V to 5.25V. The AD7091R-2BRUZ accepts supplies from 2.09V to 5.25V, providing greater flexibility for low-voltage applications.

Q: Are both parts RoHS compliant?

A: Yes, both the AD7922ARMZ and AD7091R-2BRUZ are ROHS3 compliant and REACH unaffected, meeting regulatory requirements for restricted substance use.