Analog Devices Inc./Maxim Integrated DS1267S-010+T&R

Overview

DS1267S-010+T&R from Maxim Integrated (now Analog Devices) is a dual-channel, 256-position digital potentiometer in 16-pin SOIC package with 10 kΩ end-to-end resistance per channel, ±0.3 LSB relative linearity, and 3-wire serial interface (RST/CLK/DQ) for wiper position control. It operates from 4.5 V to 5.5 V over -40°C to +85°C and supports stacked configuration for 512-step resolution.

For engineers reviewing the DS1267S-010+T&R datasheet, DS1267S-010+T&R pinout, DS1267S-010+T&R application, or DS1267S-010+T&R equivalent, this device serves as a programmable analog gain/attenuation element in precision instrumentation, sensor calibration, and voltage-controlled amplifier circuits where nonvolatile wiper setting is not required but low-power, quiet operation and daisy-chain capability are critical.

Technical Context

The DS1267S-010+T&R implements two independent 8-bit-controlled resistive ladders, each with 256 tap points and temperature-compensated resistive elements. Its 3-wire serial interface uses RST as chip-select enable, CLK for synchronous bit sampling, and DQ for bidirectional data transfer - with COUT providing cascaded output for multi-device daisy-chaining.

Wiper positions are stored in a 17-bit shift register (stack select bit + 8-bit wiper-1 + 8-bit wiper-0), loaded only on RST falling edge. Stacked mode (via stack select bit) routes either W0 or W1 to SOUT, doubling effective resolution to 9 bits while maintaining 10 kΩ total resistance when both pots are series-connected.

Key Specifications

Pinout & Package

DS1267S-010+T&R is housed in a 16-pin SOIC (300-mil) package with gull-wing leads, JEDEC MS-012AC compliant, 1.27 mm pitch, and 10.3 mm × 7.5 mm body dimensions.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5232BRUZ10 and MCP42010-I/P, the DS1267S-010+T&R uniquely supports hardware-stacked 9-bit resolution and true daisy-chain readback via COUT - making it optimal for multi-channel trimming where real-time wiper monitoring and extended step count outweigh nonvolatility requirements.

Availability

DS1267S-010+T&R is available at Aetrix Electronics and suitable for industrial instrumentation, sensor calibration, programmable attenuators, and motor control applications requiring stable component supply, long-term sourcing continuity, and RoHS-compliant packaging.

Supply support for DS1267S-010+T&R 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 (acquired by Analog Devices in 2021) designs precision analog and mixed-signal ICs for industrial, automotive, and communications markets, emphasizing low-power, high-reliability performance.

The DS1267S-010+T&R belongs to Maxim's digital potentiometer family engineered for replacing mechanical trimmers in automated test equipment, factory-calibrated sensors, and closed-loop analog control systems where serial configurability and low standby current are essential.

FAQ

What is the function of the VB pin on the DS1267S-010+T&R?

The VB (substrate bias) pin on the DS1267S-010+T&R must be connected to GND for normal operation. It establishes the substrate reference for the internal CMOS switches and resistive elements. Per Absolute Maximum Ratings, VB may range from –5.5 V to GND - but operation at negative VB requires corresponding negative voltage on resistor pins (L/H/W), which is not supported in standard 5 V systems. For DS1267S-010+T&R, grounding VB ensures optimal linearity and wiper resistance stability.

Does the DS1267S-010+T&R retain wiper settings after power removal?

No, the DS1267S-010+T&R is a volatile digital potentiometer: wiper positions are lost when VCC is removed. On power-up, both wipers reset to mid-scale (128 decimal, binary 10000000). To maintain settings across power cycles, an external microcontroller must reinitialize the DS1267S-010+T&R via its 3-wire interface during startup - a design choice enabling ultra-low standby current (22 µA) and eliminating EEPROM wear-out concerns.

Can the DS1267S-010+T&R be used in a single-potentiometer configuration?

Yes, the DS1267S-010+T&R supports independent operation of either potentiometer. L0/H0/W0 form one 10 kΩ pot; L1/H1/W1 form the second. Either can be used alone while leaving the other terminals unconnected (or tied to safe voltages within VB–VCC range). The serial interface allows writing to one wiper only - bits 1–8 control pot-1 (W1), bits 9–16 control pot-0 (W0) - giving full per-channel addressability without hardware modification.

What is the maximum clock frequency supported by the DS1267S-010+T&R serial interface?

The DS1267S-010+T&R supports a maximum CLK frequency of 10 MHz, with minimum pulse width of 50 ns for both high and low states. At 10 MHz, a complete 17-bit write transaction takes approximately 1.7 µs. This timing allows rapid reconfiguration in closed-loop systems such as adaptive filter tuning or real-time gain compensation - significantly faster than I²C-based alternatives limited to 400 kHz.

How does the stacked configuration work on the DS1267S-010+T&R?

In stacked mode, the DS1267S-010+T&R connects both potentiometers in series between L0 and H1, yielding 20 kΩ total resistance and 512 discrete steps. The stack select bit (bit 0 of the 17-bit shift register) determines whether SOUT outputs W0 (bit = 0) or W1 (bit = 1). This eliminates external wiring changes and enables software-selectable dual-ratio gain paths - e.g., coarse/fine adjustment or high/low sensitivity modes - all within one DS1267S-010+T&R device.