Analog Devices Inc./Maxim Integrated DS1052Z-100+

Overview

DS1052Z-100+ from Maxim Integrated (now part of Analog Devices) is a 5-bit programmable pulse-width modulator IC with fixed 100kHz output frequency, 2-wire serial interface, and 8-pin SOIC package. It delivers adjustable PWM duty cycle from 0% to 100% across 2.7V–5.5V supply, consumes only 100µA active current and 1µA shutdown current, and operates from –40°C to +85°C - ideal for LCD contrast control and low-power voltage regulation.

For engineers reviewing the DS1052Z-100+ datasheet, DS1052Z-100+ pinout, DS1052Z-100+ application, or DS1052Z-100+ equivalent, key selection considerations include its 5-bit resolution (3.125% step size), I²C-compatible 2-wire slave interface supporting up to eight devices on one bus, guaranteed 100kHz nominal frequency ±20%, and true 100% duty-cycle "full-on" command - all in a space-constrained 150-mil SOIC footprint.

Technical Context

The DS1052Z-100+ implements a dedicated 5-bit PWM generator core synchronized to an internal oscillator set to 100kHz. Its 2-wire interface operates in both standard (100kHz SCL) and fast mode (400kHz SCL), with hardware-addressed slave operation via A0–A2 pins and open-drain SDA/SCL signaling compliant with I²C timing requirements.

It features dual operational states: active PWM generation with rail-to-rail 0V–VCC output swing, and low-power shutdown mode where PWMO enters high-impedance state and supply current drops to ≤1µA. The device powers up at 50% duty cycle (10000B) and supports read-back of register contents including shutdown status.

Key Specifications

Pinout & Package

DS1052Z-100+ is housed in an 8-pin 150-mil SOIC package (JEDEC MS-012AA), with gull-wing leads, 1.27mm pitch, and standard surface-mount footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX16992ATG+ and ADP1046ACPZ-R7, the DS1052Z-100+ uniquely balances ultra-low power (1µA shutdown), I²C multi-drop support, and 2.7V–5.5V operation in a minimal 8-pin SOIC - making it optimal for space- and power-constrained embedded analog control where simplicity and bus efficiency are prioritized over high-voltage drive or digital power management features.

Availability

DS1052Z-100+ is available at Aetrix Electronics and suitable for LCD contrast control, DC-DC feedback adjustment, and battery charging current regulation requiring stable component supply, long-term lifecycle assurance, and traceable sourcing for industrial and medical OEM programs.

Supply support for DS1052Z-100+ 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, medical, communications, and computing applications.

The DS1052 product line delivers compact, low-power programmable PWM generators for analog voltage/current control - targeting cost-sensitive, space-constrained embedded systems needing digital configurability without MCU resource overhead.

FAQ

What is the exact output frequency tolerance of the DS1052Z-100+?

The DS1052Z-100+ has a nominal output frequency of 100kHz with a tolerance of ±20% over the full operating temperature and supply voltage range. This specification is confirmed in the AC Electrical Characteristics table (Note 12) and reflects worst-case variation due to process, voltage, and temperature - not typical deviation. For applications requiring tighter frequency stability, external calibration or closed-loop feedback is recommended.

Does the DS1052Z-100+ support true 100% duty cycle, and how is it implemented?

Yes, the DS1052Z-100+ supports true 100% duty cycle ("full-on") via a dedicated command distinct from the standard 5-bit register write. While the 5-bit register covers 0%–96.88% in 3.125% steps, the separate "Set PWM Duty Cycle 100%" command forces PWMO to remain continuously high - essential for enabling bias rails or bypassing regulation stages without ripple. This function is explicitly documented in Figures 4b and the Command Protocol section.

Can multiple DS1052Z-100+ devices share the same I²C bus, and how is addressing managed?

Yes, up to eight DS1052Z-100+ devices can operate on a single 2-wire bus using hardware-configurable slave addresses. Pins A0, A1, and A2 are hardwired to VCC or GND to set a unique 3-bit address field within the 7-bit I²C address (prefix 0101xxx). Each device responds only to its assigned address, enabling coordinated control of multiple PWM outputs from one microcontroller - verified in the SLAVE ADDRESS and PIN ASSIGNMENT sections.

What is the shutdown behavior of the DS1052Z-100+, and does it retain register state?

When placed in shutdown mode via the "Set Shutdown Mode" command, the DS1052Z-100+ reduces supply current to ≤1µA and places the PWMO output in high-impedance state - disconnecting it from the load. Crucially, the internal 5-bit PWM register retains its last programmed value, allowing immediate restoration of the prior duty cycle upon issuing the "Recall Mode" command - a feature confirmed in the COMMAND AND PROTOCOL section and Figure 4c/d.

Is the DS1052Z-100+ pin-compatible with the DS1052U-100 variant?

No, the DS1052Z-100+ and DS1052U-100 are functionally identical but packaged in different footprints: DS1052Z-100+ uses 8-pin 150-mil SOIC, while DS1052U-100 uses 8-pin 118-mil SOP. Their pinouts match electrically (VCC, GND, PWMO, SCL, SDA, A0–A2), but the physical dimensions, lead pitch, and solder pad layouts differ - requiring separate PCB land patterns. This distinction is explicitly stated in the ORDERING INFORMATION section.