AD7846AP Equivalent & Substitute Parts

Part Overview

The AD7846AP is a 16-bit digital-to-analog converter (DAC) manufactured by Analog Devices Inc., designed for data acquisition applications requiring voltage output conversion. The device features a String DAC architecture with parallel data interface and external reference capability. The AD7846AP is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support, redesigns, and new production requirements.

Substiute Parts

AD7846AP

Analog Devices Inc.In Stock: 1658AD7846AP Datasheet

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AD5541AACPZ-REEL7

Analog Devices Inc.In Stock: 18915AD5541AACPZ-REEL7 Datasheet

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AD5542AACPZ-REEL7

Analog Devices Inc.In Stock: 1337AD5542AACPZ-REEL7 Datasheet

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AD5760ACPZ

Analog Devices Inc.In Stock: 1251AD5760ACPZ Datasheet

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AD5761RBCPZ-RL7

Analog Devices Inc.In Stock: 1360AD5761RBCPZ-RL7 Datasheet

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AD7846BPZ

Analog Devices Inc.In Stock: 1513AD7846BPZ Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the AD7846AP is determined by the following critical parameters:

Core Functional Requirements:

• 16-bit resolution (Number of Bits)
• Single converter (Number of D/A Converters = 1)
• Voltage output with buffering capability
• External reference support

Interface Compatibility:

• Data interface type (Parallel vs. SPI/DSP)
• Supply voltage ranges (analog and digital)

Performance Characteristics:

• Settling time tolerance
• INL/DNL specifications
• Operating temperature range

Physical Constraints:

• Package type and form factor
• Mounting technology (Surface Mount)

Substitute parts are grouped into two categories:

Category 1: Direct Package Equivalents - Parts maintaining the 28-PLCC package format with identical parallel interface and buffered output characteristics (AD7846BPZ).

Category 2: Functional Equivalents with Alternative Packaging - Parts meeting 16-bit resolution and buffered output requirements but utilizing different package formats and interface protocols (AD5761RBCPZ-RL7, AD5760ACPZ, AD5542AACPZ-REEL7, AD5541AACPZ-REEL7).

Parameter Comparison

Engineering Selection Recommendations

AD7846BPZ - Direct equivalent for existing AD7846AP designs. Maintains identical package format (28-PLCC), parallel interface, buffered output, and supply voltage specifications. Recommended for drop-in replacement in legacy systems. Active product status ensures long-term availability. ROHS3 compliant.

AD5761RBCPZ-RL7 - Suitable for designs requiring buffered output with enhanced supply voltage flexibility and internal reference option. Settling time matches the original specification (9µs). Supports both SPI and parallel-compatible protocols. Extended operating temperature range (-40°C ~ 125°C). Requires PCB redesign due to 16-LFCSP package format. Active product status. ROHS3 compliant.

AD5760ACPZ - Applicable for applications tolerating unbuffered output with improved settling time (4.6µs typical). Supports extended analog supply voltage range. Requires interface protocol conversion from parallel to SPI/DSP. 24-LFCSP package necessitates board layout modification. Active product status. ROHS3 compliant.

AD5542AACPZ-REEL7 - Suitable for designs permitting unbuffered output and SPI/DSP interface conversion. Offers superior INL/DNL performance (±0.5 LSB). Requires significant firmware and PCB redesign. 16-LFCSP package. Active product status. ROHS3 compliant.

AD5541AACPZ-REEL7 - Applicable for low-voltage applications (2.7V ~ 5.5V supply). Fastest settling time (1µs) among substitutes. Requires interface protocol conversion and unbuffered output accommodation. Smallest package footprint (10-LFCSP). Extended operating temperature range (-40°C ~ 125°C). Active product status. ROHS3 compliant.

Frequently Asked Questions (FAQ)

Q: Can AD7846BPZ directly replace AD7846AP without PCB modifications?

A: Yes. AD7846BPZ maintains identical package format (28-PLCC), pinout compatibility, parallel data interface, buffered output configuration, and supply voltage specifications (±11.4V ~ 15.75V analog, 5V digital). No circuit redesign is required.

Q: What are the primary differences between AD7846AP and the AD5000-series substitutes?

A: The AD5000-series parts (AD5761, AD5760, AD5542, AD5541) utilize R-2R architecture instead of String DAC, employ SPI/DSP interfaces instead of parallel, and feature smaller CSP packages instead of 28-PLCC. These differences require firmware modification, interface circuitry redesign, and PCB layout changes.

Q: Which substitute offers the best linearity performance?

A: AD5541AACPZ-REEL7 and AD5542AACPZ-REEL7 provide superior INL/DNL specifications (±0.5 LSB) compared to the original AD7846AP (±16/±1 LSB). However, these parts feature unbuffered output and require SPI/DSP interface implementation.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts (AD7846BPZ, AD5761RBCPZ-RL7, AD5760ACPZ, AD5542AACPZ-REEL7, AD5541AACPZ-REEL7) are ROHS3 compliant. The original AD7846AP RoHS status is not specified.

Q: Which substitute supports the widest operating temperature range?

A: AD5761RBCPZ-RL7 and AD5541AACPZ-REEL7 both support -40°C ~ 125°C, extending the original AD7846AP range of -40°C ~ 85°C.

Q: Can AD5760ACPZ operate with the same supply voltages as AD7846AP?

A: Partially. AD5760ACPZ analog supply range (7.5V ~ 16.5V, -2.5V ~ 16.5V) overlaps with AD7846AP (±11.4V ~ 15.75V) but offers extended negative supply capability. Digital supply differs (2.7V ~ 5.5V vs. 5V fixed).

Q: What is the impact of switching from buffered to unbuffered output?

A: Unbuffered output (AD5760, AD5542, AD5541 series) requires external buffering amplifier circuitry to maintain output impedance and drive capability equivalent to the buffered AD7846AP. This increases component count and PCB area.

Q: Which substitute requires the least design modification?

A: AD7846BPZ requires zero design modification, maintaining identical package, interface, and electrical specifications. All other substitutes require varying degrees of firmware, interface circuitry, and PCB redesign.