Analog Devices Inc./Maxim Integrated DS1803E-010+

Overview

DS1803E-010+ from Maxim Integrated is a dual-channel, volatile digital potentiometer with two independent 256-position 10kΩ resistor arrays, 2-wire I²C-compatible serial interface, 3V/5V operation, and industrial temperature range (-40°C to +85°C), used for precision gain/offset trimming in sensor signal conditioning circuits.

For engineers reviewing the DS1803E-010+ datasheet, DS1803E-010+ pinout, DS1803E-010+ application, or DS1803E-010+ equivalent, this page delivers verified package mapping (14-pin TSSOP), wiper resolution (1/255 × 10kΩ ≈ 39.2Ω/step), volatile initialization behavior (wipers reset to 00h at power-up), and interoperability constraints (A0–A2 addressable up to 8 devices on shared bus).

Technical Context

The DS1803E-010+ implements two discrete 256-tap resistor ladders with independently addressable wiper registers, each controlled via an I²C-compliant 2-wire interface using SDA/SCL lines and hardware-selectable slave address (0101xxxR/W). It operates as a slave-only device with no internal clock generation or EEPROM storage.

Wiper positioning is volatile and fully software-controlled: write commands (0xA9, 0xAA, 0xAF) set pot-0, pot-1, or both simultaneously; read command returns both 8-bit wiper values sequentially. Address inputs A0–A2 determine the 3-bit device ID field in the 7-bit slave address (0x50–0x57), enabling multi-drop bus configuration without external decoding logic.

Key Specifications

Pinout & Package

DS1803E-010+ is housed in a lead-free 14-pin TSSOP package (173 mil width), optimized for automated surface-mount assembly and space-constrained PCB layouts. Thermal pad is not present; standard reflow profiles apply.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5242BRUZ10 and MCP42010-I/P, DS1803E-010+ uniquely balances I²C multi-drop capability, 3V/5V flexibility, and ultra-low standby power-making it optimal for battery-backed or distributed calibration nodes where volatility is acceptable and bus efficiency is critical.

Availability

DS1803E-010+ is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable power supplies, and audio signal path trimming requiring stable component supply, consistent lead-free TSSOP packaging, and guaranteed long-term manufacturability.

Supply support for DS1803E-010+ 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 precision analog, mixed-signal, and power management ICs for industrial, communications, and computing applications.

The DS1803E-010+ belongs to Maxim's digital potentiometer product line, designed specifically for replacing mechanical trimmers in automated calibration, closed-loop control, and reconfigurable analog signal chains.

FAQ

What is the default wiper position of DS1803E-010+ after power-up?

Upon power-up, DS1803E-010+ initializes both wipers to position 00h, connecting W0 and W1 directly to their respective L0 and L1 terminals. This behavior is inherent to its volatile architecture and ensures repeatable startup states without external initialization code, though firmware typically writes desired positions immediately after boot.

Can DS1803E-010+ operate from a 3.3V supply?

Yes, DS1803E-010+ supports 2.7V to 5.5V operation, making it fully compatible with 3.3V systems. Its I²C interface meets Standard Mode timing at 3.3V, and all DC electrical parameters-including VIH (≥2.31V) and VIL (≤0.99V)-are satisfied within this supply range, ensuring reliable communication with 3.3V microcontrollers.

Does DS1803E-010+ support bidirectional data transfer on the I²C bus?

Yes, DS1803E-010+ implements full I²C slave functionality: it accepts write commands (e.g., 0xA9 to set pot-0) and responds to read requests by transmitting both 8-bit wiper values sequentially on SDA. The device generates ACK bits after each byte received and acknowledges its own slave address during bus arbitration.

What is the maximum signal frequency that can pass through DS1803E-010+ without significant attenuation?

DS1803E-010+ has a -3 dB cutoff frequency of approximately 1 MHz when configured as a 10kΩ potentiometer. This limit arises from parasitic capacitance (5pF) and wiper resistance (400–1000Ω); for AC signals above 100 kHz, users should verify amplitude flatness and phase response in their specific circuit topology and loading condition.

How many DS1803E-010+ devices can share the same I²C bus?

Up to eight DS1803E-010+ devices can coexist on a single I²C bus using the A0, A1, and A2 address pins to configure unique 3-bit slave addresses (0x50–0x57). Each device responds only to its assigned address, enabling scalable multi-channel calibration without additional address decoders or bus expanders.