Analog Devices Inc. LTC6930HDCB-4.19#TRPBF

Overview

LTC6930HDCB-4.19#TRPBF from Analog Devices (formerly Linear Technology) is a digitally controlled, precision silicon oscillator with factory-set master frequency of 4.194304MHz and user-selectable divide-by-1 to -128 outputs (32.768kHz–4.194304MHz), ±0.1% frequency accuracy over –40°C to 125°C, 105µA typical supply current at 32kHz/3V, and 490µA at 4.19MHz/3V. It serves as a low-power clock source in battery-operated industrial sensors and automotive body control modules.

For engineers reviewing the LTC6930HDCB-4.19#TRPBF datasheet, LTC6930HDCB-4.19#TRPBF pinout, LTC6930HDCB-4.19#TRPBF application, or LTC6930HDCB-4.19#TRPBF equivalent, key selection criteria include guaranteed ±0.1% accuracy across full temperature range, sub-110µs power-on delay, DFN-8 (2mm × 3mm) package with exposed thermal pad, and no external components required beyond 0.1µF bypass capacitors.

Technical Context

The LTC6930HDCB-4.19#TRPBF implements a proprietary switched-capacitor feedback loop to stabilize its internal 4.194304MHz master oscillator against temperature and supply variation. Its digital divider architecture uses three CMOS input pins (DIVA/DIVB/DIVC) to select one of eight binary division ratios (1–128), enabling precise output frequencies without trimming or calibration.

It features dual V+ pins (Pins 1 & 8) and dual GND pins (Pins 2 & 6) to isolate oscillator core from output driver noise, achieving typical RMS period jitter <0.15% at 3V and rise/fall times ≤3ns. The device operates from 1.7V to 5.5V, supports load capacitance up to 50pF, and holds OUT low during start-up to prevent glitches.

Key Specifications

Pinout & Package

Package: 8-lead plastic DFN (2mm × 3mm), exposed pad (Pin 9) must be soldered to GND for thermal and electrical performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digitally controlled oscillator applications.

Compared with SiT1533AI-H4-33E-32.768D and MAX7375ETE+T, the LTC6930HDCB-4.19#TRPBF uniquely delivers programmable frequency, ±0.1% accuracy over –40°C to 125°C, and sub-110µs start-up - making it the only option for high-reliability, multi-frequency, extended-temperature embedded timing.

Availability

LTC6930HDCB-4.19#TRPBF is available at Aetrix Electronics and suitable for industrial sensor nodes, automotive body control modules, portable medical monitors, and smart energy meters requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for LTC6930HDCB-4.19#TRPBF 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 acquired Linear Technology in 2017 and maintains its precision analog and timing product lines. Linear pioneered high-performance silicon oscillators with proprietary stabilization techniques.

The LTC6930 product line was designed for battery-constrained, high-temperature applications requiring crystal-level accuracy without quartz components - targeting industrial automation, automotive subsystems, and portable instrumentation.

FAQ

What is the guaranteed frequency accuracy of the LTC6930HDCB-4.19#TRPBF over its full operating temperature range?

The LTC6930HDCB-4.19#TRPBF guarantees ±0.1% frequency accuracy over its specified operating temperature range of –40°C to 125°C. This specification applies to all eight output frequencies derived from the 4.194304MHz master oscillator via the DIVA/DIVB/DIVC pins, and is measured at V+ = 3V with CLOAD = 5pF. The H-grade qualification ensures this accuracy is production-tested across the full range.

Does the LTC6930HDCB-4.19#TRPBF require external load capacitors like quartz crystals?

No, the LTC6930HDCB-4.19#TRPBF does not require external load capacitors. It is a fully integrated silicon oscillator with an internal resonator and proprietary feedback loop. Only two 0.1µF ceramic bypass capacitors - one between each V+ pin (Pins 1 and 8) and its adjacent GND pin (Pins 2 and 6) - are required for stable operation. This eliminates crystal matching, ESD protection, and layout sensitivity issues.

How does the LTC6930HDCB-4.19#TRPBF achieve such low supply current at 32kHz?

The LTC6930HDCB-4.19#TRPBF achieves 105µA typical supply current at 32kHz through a combination of ultralow-power circuit design and adaptive divider operation. At lower output frequencies (e.g., ÷128 mode), the internal master oscillator runs continuously but the output driver is gated, reducing dynamic power. Its proprietary switched-capacitor control loop consumes minimal quiescent current, and the DFN package's low thermal resistance enables efficient heat dissipation without active cooling.

Can the DIV pins of the LTC6930HDCB-4.19#TRPBF be changed dynamically during operation?

Yes, the DIVA, DIVB, and DIVC pins of the LTC6930HDCB-4.19#TRPBF can be changed dynamically during operation. The device responds within one output clock cycle with no glitches, runt pulses, or frequency transients. This enables real-time clock scaling in power-managed systems. Input thresholds are CMOS-compatible (VIH ≥ 1.25V, VIL ≤ 1.25V), and no external pull resistors are needed - direct connection to MCU GPIOs is sufficient.

What is the purpose of the exposed pad (Pin 9) on the LTC6930HDCB-4.19#TRPBF DFN package?

The exposed pad (Pin 9) on the LTC6930HDCB-4.19#TRPBF DFN package must be soldered to a PCB ground plane. It serves two critical functions: (1) thermal conduction - lowering junction-to-board thermal resistance to maintain stability under continuous 4.19MHz operation at 125°C, and (2) electrical grounding - providing a low-inductance return path for internal oscillator core currents, which minimizes supply noise coupling and preserves ±0.1% accuracy. Omitting this connection degrades both thermal performance and frequency stability.