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Product Detailed Parameters
- Description：MAX5408 DUAL, AUDIO, LOG TAPER D
- Series：-
- Mfr：Analog Devices Inc./Maxim Integrated
- Package：Bulk
- Taper：Logarithmic
- Configuration：Potentiometer
- Number of Circuits：2
- Number of Taps：32
- Resistance (Ohms)：13k
- Interface：SPI
- Memory Type：Volatile
- Voltage - Supply：2.7V ~ 3.6V
- Features：Cascade Pin
- Tolerance：-
- Temperature Coefficient (Typ)：35ppm/°C
- Mounting Type：Surface Mount
- Supplier Device Package：16-QFN (4x4)
- Package / Case：16-VQFN Exposed Pad
- Operating Temperature：-40°C ~ 85°C
- Resistance - Wiper (Ohms) (Typ)：1
- Grade：-
- Qualification：-
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Overview
The MAX5408EGE+ is a dual-channel digital potentiometer IC from the Maxim Integrated portfolio, now part of Analog Devices. It features two independent 32-tap wiper positions with a logarithmic taper, specifically designed for audio applications. The device operates on a single supply voltage ranging from 2.7V to 3.6V and draws a typical operating current of 100µA. Resistance tolerance is specified at ±30%, with a temperature coefficient of 35ppm/°C. Communication is handled via a standard 3-wire SPI serial interface. The component utilizes volatile memory to store wiper settings, requiring re-initialization upon power cycles.
Feature Summary
- Dual-channel architecture with 32 discrete tap positions per potentiometer
- Logarithmic resistance taper optimized for audio volume control applications
- Low-power operation with 100µA typical supply current at 3.3V
- 3-Wire SPI compatible serial interface for wiper position control
Applications
- Audio volume control circuits
- Gain adjustment in analog signal paths
- Bias voltage setting in portable electronics
Procurement Notes
Verify the specific suffix 'EGE' against official Analog Devices documentation to confirm package type (QSOP-16) and industrial/commercial temperature range. Ensure RoHS compliance status matches project requirements by checking the latest manufacturer declaration. Confirm availability through authorized distributors as lead times may vary based on production status.
Selection Notes
Select this component when dual-channel logarithmic attenuation is required for audio signals. The 32-tap resolution provides sufficient granularity for volume control without excessive interface complexity. Verify that the 3.6V maximum supply voltage aligns with the system's power rails. Consider the ±30% resistance tolerance if precise absolute resistance values are critical for the application design.
Part Context
This part belongs to the MAX5408 family of dual digital potentiometers. It shares functional similarities with other MAX54xx series devices but is distinct due to its logarithmic taper and 32-tap configuration. Unlike non-volatile variants such as the MAX5488, the MAX5408 retains settings only while powered, simplifying the internal architecture and reducing power consumption.
FAQ
Is the MAX5408EGE non-volatile?
No, the MAX5408 uses volatile memory. Wiper positions are lost when power is removed and must be reprogrammed after each power cycle.
What is the resistance tolerance of the MAX5408?
The nominal resistance tolerance is specified as ±30%.
Does the MAX5408 support I2C communication?
No, the MAX5408 communicates exclusively via a 3-wire SPI serial interface.
