Analog Devices Inc./Maxim Integrated DS1267S-010

Overview

DS1267S-010 from Maxim Integrated (now Analog Devices) is a dual 256-position digital potentiometer in 16-pin SOIC package, featuring two independent 10 kΩ resistive arrays with ±0.3 LSB relative linearity, 3-wire serial interface (RST/CLK/DQ), and stacked/cascaded configuration support for extended resolution or multi-device control. It operates from 4.5 V to 5.5 V across –40°C to +85°C and is used in precision gain/attenuation circuits.

For engineers reviewing the DS1267S-010 datasheet, DS1267S-010 pinout, DS1267S-010 application, or DS1267S-010 equivalent, key selection criteria include 10 kΩ end-to-end resistance, 8-bit per pot wiper resolution, stack-select bit control via 17-bit shift register, cascading capability using COUT/DQ daisy-chaining, and industrial temperature range compliance.

Technical Context

The DS1267S-010 integrates two matched 256-tap resistor arrays with temperature-compensated resistive elements and wiper terminals (W0/W1) connected via internal multiplexers controlled by an 8-bit value per pot. Its 3-wire serial port uses RST as chip-select enable, CLK for synchronous edge-triggered data transfer, and DQ for bidirectional 17-bit shift register access (stack select + wiper-1 + wiper-0).

Stacked mode doubles total resistance to 20 kΩ with 512-step resolution by series-connecting H1–L0 and selecting SOUT output via bit-0 of the shift register. Cascading is enabled by COUT's 50 ns propagation delay and RST-independent activity, allowing daisy-chained read/write of multiple DS1267S-010 devices using a single processor bus.

Key Specifications

Pinout & Package

DS1267S-010 is housed in a 16-pin SOIC (300-mil) package with exposed pad not present; pin layout optimized for serial control and dual-pot interconnection.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DS1267S-010, AD5232BRUZ10 adds nonvolatile memory but removes cascading capability, while MCP42010-I/P offers lower cost and simpler SPI control but omits stacked configuration and daisy-chain support-making DS1267S-010 uniquely suited for multi-device, resolution-extending industrial analog control.

Availability

DS1267S-010 is available at Aetrix Electronics and suitable for industrial sensor calibration, programmable gain amplifiers, audio signal conditioning, and fixed-gain attenuators requiring stable component supply and long-term obsolescence management.

Supply support for DS1267S-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, designs precision analog and mixed-signal ICs for industrial, medical, and communications applications.

The DS1267S-010 belongs to Maxim's digital potentiometer product line, engineered for replacing mechanical trimmers in automated calibration, gain control, and sensor signal conditioning systems where digital programmability and temperature stability are essential.

FAQ

What is the end-to-end resistance value of the DS1267S-010?

The DS1267S-010 has a nominal end-to-end resistance of 10 kΩ per potentiometer, as indicated by the "-010" suffix. This value is specified with ±20% tolerance at 25°C and remains stable across the full –40°C to +85°C operating range due to temperature compensation. The 10 kΩ value is optimized for compatibility with standard op-amp feedback networks and sensor interface circuits.

How does the stacked configuration work on the DS1267S-010?

The DS1267S-010 supports stacked configuration by connecting H1 to L0, forming a 20 kΩ series resistor string with 512 discrete tap points. The SOUT pin outputs either W0 or W1 based on the stack select bit (bit 0) in the 17-bit shift register. When enabled, this mode doubles resolution and total resistance without adding external components-uniquely extending analog tuning range beyond single-pot limits.

Can multiple DS1267S-010 devices be controlled from a single microcontroller?

Yes, the DS1267S-010 supports daisy-chained cascading via its COUT pin, which outputs shifted data with ≤50 ns delay regardless of RST state. By connecting COUT of one DS1267S-010 to DQ of the next, a single 3-wire bus can configure multiple units. Total bits transmitted equal 17 × number of devices, enabling synchronized wiper updates across a system without additional GPIOs or address decoding.

What is the function of the VB pin on the DS1267S-010?

The VB (substrate bias) pin on the DS1267S-010 must be connected to GND for standard +5 V operation. It enables safe operation of resistor terminals (H/L/W) at voltages down to –5.5 V relative to GND when biased negatively. Leaving VB unconnected or floating violates absolute maximum ratings; grounding VB ensures proper junction isolation and prevents latch-up in mixed-voltage signal paths.

Does the DS1267S-010 retain wiper settings after power cycling?

No, the DS1267S-010 is a volatile digital potentiometer: wiper positions reset to mid-scale (128, or 50% resistance) on power-up. It lacks onboard EEPROM or nonvolatile memory. To maintain settings across power cycles, the host controller must reinitialize the 17-bit shift register-including stack select bit and both wiper values-during startup sequence using the 3-wire serial interface.