Analog Devices Inc./Maxim Integrated MAX5453EUD+T

Overview

MAX5453EUD+T from Maxim Integrated is a dual 256-tap digital potentiometer in 14-pin TSSOP package, configured as two independent 3-terminal potentiometers with 50kΩ end-to-end resistance, ±1 LSB integral nonlinearity, and 35ppm/°C end-to-end temperature coefficient. It operates from +2.7V to +5.5V single supply and draws only 0.1µA quiescent current, enabling precision gain adjustment in low-power industrial sensor signal chains.

For engineers reviewing the MAX5453EUD+T datasheet, MAX5453EUD+T pinout, MAX5453EUD+T application, or MAX5453EUD+T equivalent, key selection criteria include its up/down interface architecture, midscale power-on reset (position 127), glitchless tap switching, and ratiometric tempco of 5ppm/°C for stable voltage-divider operation across -40°C to +85°C.

Technical Context

The MAX5453EUD+T implements two independent resistor arrays, each with 255 resistive elements and 256 accessible wiper positions. Its up/down control logic uses separate U/D1/U/D2 and INC1/INC2 inputs per channel, enabling independent, asynchronous wiper positioning without serial protocol overhead.

Each potentiometer supports voltage-divider mode (H–W–L) with H terminal connected externally, and features make-before-break wiper switching to prevent open-circuit transients. Power-on reset ensures deterministic initialization at position 127, critical for repeatable analog calibration sequences.

Key Specifications

Pinout & Package

MAX5453EUD+T is housed in a 14-pin TSSOP package (4.4mm body width, 0.65mm pitch) with exposed pad for thermal enhancement and mechanical stability in high-vibration environments.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital potentiometer applications.

Compared with AD5243BRMZ50 and MCP42050-I/P, the MAX5453EUD+T delivers deterministic midscale startup, zero-protocol wiper control, and superior 5ppm/°C ratiometric tempco-making it optimal for analog-intensive, low-software-overhead designs where voltage-divider stability is paramount.

Availability

MAX5453EUD+T is available at Aetrix Electronics and suitable for programmable gain amplifiers, adjustable voltage references, and LCD screen adjustment requiring stable component supply, long-term lifecycle support, and guaranteed -40°C to +85°C operation.

Supply support for MAX5453EUD+T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, medical, and communications systems.

The MAX5450–MAX5455 family was designed specifically for replacing mechanical potentiometers in precision analog signal conditioning-emphasizing low tempco, deterministic initialization, and minimal external components.

FAQ

What is the maximum operating frequency of the INC inputs for MAX5453EUD+T?

The MAX5453EUD+T supports a maximum INC clock frequency of 7MHz, as specified in the Timing Characteristics table. This allows wiper position updates at up to 7 million steps per second, enabling rapid gain sweeps or real-time adaptive filtering. The specification holds across the full -40°C to +85°C temperature range and +2.7V to +5.5V supply range. Each INC falling edge triggers one wiper step when its associated CS and U/D pins are asserted correctly.

Does MAX5453EUD+T retain wiper position after power cycling?

No, the MAX5453EUD+T does not retain wiper position after power cycling-it performs a power-on reset (POR) that forces both wipers to midscale position 127. This behavior is deterministic and guaranteed across all units. If nonvolatile storage is required, an external microcontroller must read back and reprogram the desired positions after each power-up. The MAX5453EUD+T itself contains no EEPROM or flash memory.

Can MAX5453EUD+T be used in variable resistor (2-terminal) mode?

No, the MAX5453EUD+T is specifically configured as a 3-terminal potentiometer (H–W–L) and cannot be internally reconfigured as a 2-terminal variable resistor. Its pinout exposes H1, W1, L1 and H2, W2, L2 separately, and internal connections differ from the 2-terminal MAX5452EUB variant. For 2-terminal operation, select MAX5452EUB (50kΩ, µMAX) or MAX5450EUB (10kΩ, µMAX).

What is the wiper resistance specification for MAX5453EUD+T at 5V supply?

At VDD = +5V, the MAX5453EUD+T exhibits a maximum wiper resistance (RW) of 225Ω, measured under conditions defined in Note 4 of the datasheet: injecting specified currents into W1 or W2 with L1/L2 grounded. This value represents worst-case conduction loss between wiper and low terminal, directly impacting insertion loss in series-variable-resistor configurations and THD in audio gain stages.

Is the 5ppm/°C ratiometric tempco of MAX5453EUD+T verified across the full 256-tap range?

Yes, the 5ppm/°C ratiometric temperature coefficient for MAX5453EUD+T is characterized and guaranteed across the entire operating temperature range (-40°C to +85°C) and across all 256 wiper positions. This spec reflects the matching of temperature-induced resistance change between segments of the resistor array, ensuring stable voltage division ratios regardless of wiper position-critical for applications like precision PGA feedback networks where gain error must remain bounded.