AD7983BRMZ Equivalent & Substitute Parts

Part Overview

The AD7983BRMZ is a 16-bit Analog to Digital Converter manufactured by Analog Devices Inc., part of the PulSAR® series. This SAR (Successive Approximation Register) ADC features a single pseudo-differential input with a sampling rate of 1.33 MSPS and operates from a 2.375V to 2.625V supply. The device is packaged in a 10-MSOP surface mount package and is currently in active production status. Finding equivalent or substitute parts may be necessary due to inventory constraints, packaging requirements, or application-specific performance needs.

Substiute Parts

AD7983BRMZ

Analog Devices Inc.In Stock: 3123AD7983BRMZ Datasheet

Current PartRFQ

AD7985BCPZ

Analog Devices Inc.In Stock: 2450AD7985BCPZ Datasheet

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Key Parameters

Substitute Part Grouping Explanation

The AD7985BCPZ qualifies as a substitute for the AD7983BRMZ based on the following critical parameters that determine functional compatibility:

• Resolution: Both devices maintain 16-bit conversion capability
• Input Configuration: Both feature single pseudo-differential input
• Data Interface: Both support SPI and DSP communication protocols
• Architecture: Both utilize SAR conversion architecture
• Supply Voltage: Both operate within the 2.375V to 2.625V range for analog and digital supplies
• Operating Temperature: Both support the -40°C to 85°C temperature range
• Compliance: Both are ROHS3 compliant and REACH unaffected

The primary differences between these devices are the sampling rate (1.33 MSPS vs. 2.5 MSPS), reference type flexibility (external only vs. external/internal options), packaging format (10-MSOP vs. 20-LFCSP), and moisture sensitivity level. These differences do not preclude substitution when application requirements permit.

Parameter Comparison

Engineering Selection Recommendations

Both the AD7983BRMZ and AD7985BCPZ are active production devices from Analog Devices Inc. with full ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for industrial and commercial applications.

Selection between these devices should be based on specific application requirements:

The AD7983BRMZ is suitable for applications where the 1.33 MSPS sampling rate is sufficient and external reference configuration is required. Its 10-MSOP package provides a compact footprint for space-constrained designs.

The AD7985BCPZ offers higher sampling performance at 2.5 MSPS and provides flexibility through both external and internal reference options. The 20-LFCSP package accommodates applications requiring enhanced thermal management or higher pin density. The MSL-3 moisture sensitivity level requires appropriate handling protocols during assembly.

Both devices maintain identical supply voltage ranges, operating temperature specifications, and communication interfaces, ensuring functional compatibility within their respective packaging constraints.

Frequently Asked Questions (FAQ)

Q: Can the AD7985BCPZ directly replace the AD7983BRMZ in existing designs?

A: Direct replacement depends on PCB layout and package compatibility. The AD7983BRMZ uses a 10-MSOP package while the AD7985BCPZ uses a 20-LFCSP package. Pin assignments and footprints differ, requiring PCB redesign. Electrical functionality is compatible when supply voltages and reference configurations are properly implemented.

Q: What is the impact of the higher sampling rate on the AD7985BCPZ?

A: The AD7985BCPZ operates at 2.5 MSPS compared to the AD7983BRMZ at 1.33 MSPS. This higher sampling rate enables faster data acquisition but does not affect compatibility if the application can accommodate or benefit from increased throughput. Power consumption may increase proportionally with sampling rate.

Q: Are there differences in reference voltage handling between these devices?

A: The AD7983BRMZ requires an external reference voltage source. The AD7985BCPZ supports both external and internal reference options, providing design flexibility. Applications using external references remain compatible; those requiring internal reference capability must use the AD7985BCPZ.

Q: What are the packaging and moisture sensitivity considerations?

A: The AD7983BRMZ is packaged in 10-MSOP with MSL-1 (unlimited moisture sensitivity). The AD7985BCPZ uses 20-LFCSP with MSL-3 (168 hours), requiring controlled storage and handling during assembly. MSL-3 components must be baked before reflow if storage time exceeds specified limits.

Q: Do both devices support the same communication protocols?

A: Yes, both the AD7983BRMZ and AD7985BCPZ support SPI and DSP data interfaces, ensuring software and firmware compatibility when transitioning between devices.