Analog Devices Inc./Maxim Integrated DS1050Z-005

Overview

DS1050Z-005 from Maxim Integrated 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%–100%), operates from 2.7V to 5.5V, and supports industrial temperature range (−40°C to +85°C). It serves as a compact, low-cost PWM generator for LCD contrast control and power supply voltage adjustment.

For engineers reviewing the DS1050Z-005 datasheet, DS1050Z-005 pinout, DS1050Z-005 application, or DS1050Z-005 equivalent, key selection considerations include its fixed 5kHz frequency, 5-bit resolution (3.125% step size), 2-wire addressability (A0–A2), shutdown current ≤1µA, and SOIC-8 footprint compatibility with standard PCB layouts.

Technical Context

The DS1050Z-005 implements a dedicated 5-bit PWM generator core synchronized to an internal oscillator set to 5kHz. Its 2-wire interface conforms to I²C-compatible timing (100kHz/400kHz modes) and supports up to eight devices on one bus via hardware-selectable slave addresses (A0–A2).

It features dual operating states: active mode (typical ICC = 50µA at 5V) and shutdown mode (ISTBY ≤1µA), with PWMO output transitioning to high-impedance in shutdown. Duty cycle is controlled via 5-bit register (00000B to 11111B → 0% to 96.88%) plus a dedicated "full-on" command for 100% duty cycle.

Key Specifications

Pinout & Package

DS1050Z-005 is housed in an 8-pin 150-mil SOIC package (drawing code S8-2*), with 1.27mm pitch, gull-wing leads, and standard JEDEC MS-012AC outline.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DS1050Z-010, the DS1050Z-005 trades higher frequency for lower switching losses in RC-filtered analog outputs; compared with MCP4725-I/P, it delivers turnkey PWM generation without firmware or external components-reducing validation effort and board space.

Availability

DS1050Z-005 is available at Aetrix Electronics and suitable for LCD bias control, DC-DC feedback tuning, and battery charging current regulation requiring stable component supply, long-term lifecycle support, and RoHS-compliant 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

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 DS1050 product line was designed as a family of low-cost, single-function PWM generators targeting cost-sensitive embedded systems needing simple, reliable digital control of analog parameters-without MCU overhead or external passive components.

FAQ

What is the output frequency tolerance of the DS1050Z-005?

The DS1050Z-005 has a nominal output frequency of 5kHz with a tolerance of ±20% over temperature and supply voltage. Measured data shows typical variation of ±0.5% around 5kHz at 25°C and 5V, but design must accommodate the full ±20% band per datasheet specification. This tolerance is acceptable for non-critical analog control loops like LCD bias, where absolute frequency stability is secondary to duty-cycle accuracy.

Does the DS1050Z-005 support both standard and fast-mode I²C communication?

Yes, the DS1050Z-005 supports both standard-mode (100kHz) and fast-mode (400kHz) I²C communication. Its AC electrical characteristics specify timing parameters for both modes, including tSU:DAT (250ns min in standard mode, 100ns min in fast mode) and fSCL (up to 400kHz). The device automatically adapts to the master's clock rate without configuration.

How does the DS1050Z-005 achieve 100% duty cycle when its 5-bit register only reaches 96.88%?

The DS1050Z-005 achieves 100% duty cycle using a dedicated "Set PWM Duty Cycle 100%" command (control byte 0x50, data byte 0x20), separate from the standard 5-bit register write. This command forces PWMO to remain high continuously, bypassing the 5-bit DAC. The DS1050Z-005 retains this state until overwritten or placed in shutdown-ensuring full-on capability without software interpolation.

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

Yes, up to eight DS1050Z-005 devices can share one I²C bus using hardware-configurable slave addresses. Pins A0, A1, and A2 determine the 3-bit address suffix (0x50–0x57), allowing individual read/write access without bus contention. All devices respond only to their assigned address, enabling synchronized or independent PWM control in multi-channel systems.

What happens to the PWMO output during shutdown mode of the DS1050Z-005?

During shutdown mode, the DS1050Z-005 disables its internal oscillator and logic, reducing supply current to ≤1µA. The PWMO output enters high-impedance (Hi-Z) state-neither sourcing nor sinking current-and remains in that state until the "Recall Mode" command is issued. This prevents unintended loading of downstream circuits and eliminates shoot-through risk in driving stages.