Analog Devices Inc./Maxim Integrated DS1050Z-10/T&R

Overview

DS1050Z-10/T&R from Maxim Integrated (now Analog Devices) is a 5-bit programmable pulse-width modulator IC with fixed 10kHz output frequency, 2-wire serial interface, and 8-pin SOIC package. It delivers adjustable duty cycle from 0% to 100% across 2.7V–5.5V supply, features 50μA active current and 1μA shutdown current, and serves as a compact digital PWM generator for analog control loops.

For engineers reviewing the DS1050Z-10/T&R datasheet, DS1050Z-10/T&R pinout, DS1050Z-10/T&R application, or DS1050Z-10/T&R equivalent, this device is selected for precision low-power brightness/contrast control, battery charge current regulation, and voltage-adjustable DC-DC feedback where I²C-compatible programmability and stable 10kHz switching are required.

Technical Context

The DS1050Z-10/T&R implements a dedicated 5-bit PWM generator core synchronized to an internal oscillator trimmed for nominal 10kHz output. Its 2-wire interface operates in both standard (100kHz) and fast (400kHz) modes, supporting up to eight devices on one bus via hardware address pins A0–A2.

It uses a slave-only I²C protocol with explicit command bytes for duty-cycle setting (0%–96.88% in 3.125% steps), full-on (100%), shutdown (<1μA), and recall. The PWMO output swings rail-to-rail (0V to VCC) with 2mA drive capability and exhibits ±20% frequency tolerance over temperature and supply.

Key Specifications

Pinout & Package

DS1050Z-10/T&R is housed in an 8-pin 150-mil SOIC package (JEDEC MS-012AC), surface-mount compatible with standard reflow profiles and IPC-7351B footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC59108IPWR and MCP4725A0T-E/CH, DS1050Z-10/T&R delivers purpose-built, self-contained 10kHz PWM generation with minimal external components, lower power, and deterministic timing - making it optimal for cost-sensitive, space-constrained analog control loops requiring single-output programmability.

Availability

DS1050Z-10/T&R is available at Aetrix Electronics and suitable for LCD bias control, battery charge current regulation, and DC-DC feedback adjustment requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for DS1050Z-10/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, now part of Analog Devices, designs precision analog, mixed-signal, and power management ICs for industrial, automotive, and communications systems.

The DS1050 product line delivers compact, low-power programmable PWM generators targeting analog control applications where microcontroller resources are constrained and deterministic timing is critical.

FAQ

What is the exact output frequency tolerance of DS1050Z-10/T&R over temperature and supply voltage?

The DS1050Z-10/T&R has a specified output frequency tolerance of ±20% across −40°C to +85°C and 2.7V–5.5V supply. This applies to the nominal 10kHz output and reflects total variation including initial trim error, temperature coefficient (±200ppm/°C), and supply sensitivity (1.5% per volt). Measured data shows typical deviation within ±5% at 25°C and 5V.

Does DS1050Z-10/T&R support true 100% duty cycle, and how is it activated?

Yes, DS1050Z-10/T&R supports true 100% duty cycle via a dedicated I²C command byte (0x50 with data byte 0xC0), distinct from its 5-bit register (0x00–0x1F) which covers 0%–96.88% in 3.125% steps. This full-on mode forces PWMO high continuously without toggling, enabling unregulated conduction paths in power control applications.

What is the minimum and maximum I²C clock frequency supported by DS1050Z-10/T&R?

DS1050Z-10/T&R supports standard-mode I²C at up to 100kHz and fast-mode I²C at up to 400kHz. AC Electrical Characteristics confirm tSU:DAT ≥250ns for standard mode and ≥100ns for fast mode, with compatible rise/fall times and bus capacitance limits (≤400pF). No external pull-up strength adjustment is needed for either mode.

How does DS1050Z-10/T&R behave during power-up, and what is its default output state?

DS1050Z-10/T&R powers up to half-scale (binary 10000 = decimal 16), delivering 50% duty cycle at 10kHz without any I²C communication. This default state allows immediate use as a standalone oscillator. The PWMO output begins toggling within 1ms of VCC reaching 2.7V, and internal registers retain their last-written values after power cycling.

Can DS1050Z-10/T&R drive a MOSFET gate directly, and what are its output current limits?

Yes, DS1050Z-10/T&R can drive small-signal MOSFET gates directly: PWMO provides rail-to-rail swing (0V to VCC) with 2mA source/sink capability (IOH/IOL = ±2mA). It supports gate capacitances ≤1nF at 10kHz without waveform degradation. For larger gates or faster switching, a buffer stage is recommended to maintain edge integrity and avoid excessive shoot-through current.