MAX146BCAP Equivalent & Substitute Parts

Part Overview

The MAX146BCAP is a 12-bit Analog-to-Digital Converter (ADC) manufactured by Analog Devices Inc./Maxim Integrated, designed for data acquisition applications. This SAR (Successive Approximation Register) architecture device features 4 or 8 configurable input channels with both differential and single-ended input support, communicating via SPI interface. The part is currently classified as obsolete, making identification of equivalent and substitute components essential for ongoing system support and new design implementations.

Key Parameters

Parameter	Specification
Resolution	12 Bits
Sampling Rate	133 kSPS
Input Channels	4, 8
Input Configuration	Differential, Single Ended
Data Interface	SPI
Architecture	SAR
Reference Type	External, Internal
Analog Supply Voltage	2.7V to 3.6V
Digital Supply Voltage	2.7V to 3.6V
Operating Temperature Range	0°C to 70°C
Package Type	20-SSOP (0.209", 5.30mm Width)
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution for the MAX146BCAP is determined by strict equivalence across all electrical and mechanical parameters. The following criteria establish valid substitutes:

Resolution: 12 bits
Sampling rate: 133 kSPS
Input channel configuration: 4 or 8 channels
Input types: Differential and single-ended support
Data interface: SPI protocol
Architecture: SAR topology
Reference options: External and internal reference capability
Supply voltage ranges: 2.7V to 3.6V for both analog and digital supplies
Operating temperature: 0°C to 70°C
Package: 20-SSOP form factor with identical pin configuration
Mounting: Surface mount technology

All identified substitutes maintain identical functional and physical specifications, ensuring direct replacement capability in existing designs.

Parameter Comparison

Parameter	MAX146BCAP	MAX146BCAP+	MAX146ACAP+
Manufacturer	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated
Resolution	12 Bits	12 Bits	12 Bits
Sampling Rate	133 kSPS	133 kSPS	133 kSPS
Input Channels	4, 8	4, 8	4, 8
Input Type	Differential, Single Ended	Differential, Single Ended	Differential, Single Ended
Data Interface	SPI	SPI	SPI
Architecture	SAR	SAR	SAR
Reference Type	External, Internal	External, Internal	External, Internal
Analog Supply Voltage	2.7V ~ 3.6V	2.7V ~ 3.6V	2.7V ~ 3.6V
Digital Supply Voltage	2.7V ~ 3.6V	2.7V ~ 3.6V	2.7V ~ 3.6V
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C
Package / Case	20-SSOP (0.209", 5.30mm Width)	20-SSOP (0.209", 5.30mm Width)	20-SSOP (0.209", 5.30mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging Type	Bulk	Tube	Tube

Engineering Selection Recommendations

The MAX146BCAP is obsolete and no longer in active production. For new designs and ongoing system support, MAX146BCAP+ and MAX146ACAP+ are the recommended alternatives.

MAX146BCAP+ is the direct successor to the original MAX146BCAP, maintaining identical electrical and mechanical specifications while offering active product status. This part is ROHS3 compliant and supplied in tube packaging, making it suitable for both prototype and production environments.

MAX146ACAP+ provides parametric equivalence with identical functional specifications and is also ROHS3 compliant with active product status. This variant offers the highest inventory availability among the three options.

Both substitute parts eliminate the compliance and obsolescence concerns associated with the original MAX146BCAP while preserving full functional compatibility. Selection between MAX146BCAP+ and MAX146ACAP+ should be based on availability, lead time, and inventory requirements, as both deliver identical electrical performance and package specifications.

Frequently Asked Questions (FAQ)

Q: Can MAX146BCAP+ and MAX146ACAP+ be used interchangeably with MAX146BCAP?

A: Yes. Both substitute parts maintain identical electrical specifications, pin configurations, and package dimensions. Direct substitution is supported without circuit modifications.

Q: What is the difference between MAX146BCAP+ and MAX146ACAP+?

A: Both parts are parametrically equivalent with identical resolution, sampling rate, input configurations, supply voltages, and operating temperature ranges. The primary differences are product status (both active), RoHS compliance (both ROHS3 compliant), and inventory availability.

Q: Are there any package or mounting differences?

A: No. All three parts use the 20-SSOP surface mount package with identical 0.209" width and 5.30mm dimensions. PCB layout and assembly processes remain unchanged.

Q: Why is the original MAX146BCAP obsolete?

A: The MAX146BCAP has been superseded by newer variants. MAX146BCAP+ and MAX146ACAP+ represent the current active product line from Analog Devices Inc./Maxim Integrated.

Q: Are the substitute parts RoHS compliant?

A: Yes. Both MAX146BCAP+ and MAX146ACAP+ are ROHS3 compliant, addressing environmental and regulatory requirements that the original MAX146BCAP does not meet.

Q: What supply voltage range do these parts support?

A: All three parts operate with analog and digital supply voltages ranging from 2.7V to 3.6V, supporting both 3.3V and lower voltage system designs.

Q: Is the SPI interface identical across all variants?

A: Yes. All parts use the same SPI data interface protocol with identical timing and signal specifications.

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