Analog Devices Inc./Maxim Integrated DS1050Z-005+

Overview

DS1050Z-005+ from Maxim Integrated (now Analog Devices) is a 5-bit programmable pulse-width modulator IC with fixed 5kHz output frequency, 2-wire serial interface, and 8-pin SOIC package. It delivers adjustable duty cycle (0% to 100% in 3.125% steps), operates from 2.7V to 5.5V, and draws only 50µA typical active current - ideal for LCD contrast control, battery charge regulation, and low-power voltage adjustment.

For engineers reviewing the DS1050Z-005+ datasheet, DS1050Z-005+ pinout, DS1050Z-005+ application, or DS1050Z-005+ equivalent, key selection criteria include its guaranteed 5kHz nominal PWM frequency, ±20% output frequency tolerance, 5-bit resolution, I²C-compatible 2-wire addressability (A0–A2), and shutdown mode drawing ≤1µA.

Technical Context

The DS1050Z-005+ implements a dedicated oscillator core generating a precise 5kHz base frequency, with duty cycle controlled via an internal 5-bit register accessible through a standard I²C-compatible 2-wire interface. Its slave-only architecture supports up to eight devices on one bus using hardware address pins A0–A2.

It features two operational modes: active PWM generation (with PWMO swinging rail-to-rail from 0V to VCC) and ultra-low-power shutdown (PWMO high-impedance, ICC ≤1µA). The device powers up at 50% duty cycle and supports full-on (100%) and zero-duty-cycle commands beyond its native 5-bit range.

Key Specifications

Pinout & Package

DS1050Z-005+ is housed in an industry-standard 8-pin 150-mil SOIC package (JEDEC MS-012), with 1.27mm pitch and surface-mount compatibility.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar programmable PWM generator applications.

Compared with DS1050Z-005+, the DS1050Z-010+ offers double the carrier frequency for tighter control loop bandwidth or smaller passive filters, while the MAX5487EUA+ lacks integrated timing and demands additional components to replicate basic PWM functionality - making DS1050Z-005+ the most direct, self-contained solution for 5kHz PWM generation.

Availability

DS1050Z-005+ is available at Aetrix Electronics and suitable for LCD contrast control, battery charging regulation, and LED brightness management requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for DS1050Z-005+ 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

Analog Devices (via acquisition of Maxim Integrated) designs precision analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.

The DS1050 product line delivers compact, low-power, digitally programmable PWM generators targeting cost-sensitive embedded systems where simplicity, reliability, and minimal external components are critical.

FAQ

What is the guaranteed output frequency accuracy of the DS1050Z-005+?

The DS1050Z-005+ has a nominal output frequency of 5kHz with a guaranteed tolerance of ±20% across its full operating temperature range (-40°C to +85°C) and supply voltage range (2.7V to 5.5V). This specification reflects total variation including initial calibration, temperature drift (±200ppm/°C), and supply sensitivity (1.5% per volt), making it suitable for non-critical timing applications like display control and basic power regulation where absolute precision is secondary to consistency and low cost.

Does the DS1050Z-005+ support true 100% and 0% duty cycle output?

Yes, the DS1050Z-005+ supports both full-on (100%) and zero-duty-cycle (0%) states via dedicated I²C commands. While its native 5-bit register covers 0% to 96.88% in 3.125% increments, the "Set PWM Duty Cycle 100%" and implicit 0% command provide complete coverage - enabling use cases such as hard on/off control of power stages or LED strings without external logic.

Can multiple DS1050Z-005+ devices share the same I²C bus?

Yes, up to eight DS1050Z-005+ devices can operate on a single 2-wire I²C bus using hardware address pins A0, A1, and A2. Each device's 3-bit address is set by tying these pins to VCC or GND, allowing unique slave addressing. The DS1050Z-005+ responds only to commands matching its configured address, enabling coordinated PWM control across multiple subsystems from one microcontroller.

What is the maximum capacitive load the DS1050Z-005+ SDA/SCL lines can drive?

The DS1050Z-005+ I²C interface complies with standard and fast-mode specifications, supporting a total bus capacitance of up to 400pF per line. This allows reliable operation with typical PCB traces, multiple slave devices, and modest pull-up resistor values (e.g., 4.7kΩ at 3.3V). Exceeding 400pF may violate timing requirements for tR/tF and tSU:DAT, necessitating stronger pull-ups or bus buffering.

How does the DS1050Z-005+ behave during power-up?

The DS1050Z-005+ powers up automatically to a 50% duty cycle (binary 10000B) at its nominal 5kHz frequency, functioning immediately as a standalone oscillator without host intervention. This default state enables immediate operation in simple applications (e.g., fixed-brightness LED drive), while subsequent I²C writes allow dynamic adjustment of duty cycle, shutdown, or recall - ensuring robust startup behavior even if firmware initialization fails.