Analog Devices Inc. LTC6930HDCB-5.00#TRMPBF

Overview

LTC6930HDCB-5.00#TRMPBF from Analog Devices (formerly Linear Technology) is a digitally controlled silicon oscillator with factory-set 5.000000MHz master frequency, selectable via DIV pins across eight output frequencies from 39.0625kHz to 5.000MHz. It delivers ±0.1% frequency accuracy over –40°C to 125°C, consumes 124µA typical supply current at 3V/5MHz, and features <110µs power-on delay - ideal for high-reliability industrial timing in harsh-temperature environments.

For engineers reviewing the LTC6930HDCB-5.00#TRMPBF datasheet, LTC6930HDCB-5.00#TRMPBF pinout, LTC6930HDCB-5.00#TRMPBF application, or LTC6930HDCB-5.00#TRMPBF equivalent, key selection criteria include its H-grade temperature range, DFN-8 (2mm × 3mm) package with exposed thermal pad, RMS period jitter of 180ps at 5MHz, and digital frequency division without external components.

Technical Context

The LTC6930HDCB-5.00#TRMPBF implements a proprietary switched-capacitor feedback loop to stabilize its internal 5.000000MHz master oscillator against voltage and temperature variation. Its three CMOS-compatible DIV inputs (DIVA/DIVB/DIVC) configure binary dividers from 1 to 128, enabling precise frequency synthesis without crystal load tuning or trimming.

Internal dual V+ supply routing isolates the oscillator core from output driver noise, while the 40Ω CMOS output stage ensures clean signal integrity into 5pF loads. The device operates from 1.7V to 5.5V with regulated internal biasing, yielding only 0.07%/V supply-induced frequency drift and 0.001%/°C drift in the DFN package.

Key Specifications

Pinout & Package

8-lead plastic DFN package (2mm × 3mm), thermally enhanced with exposed pad (Pin 9) requiring solder connection to ground plane. Pin 1 marked by bar; top-side marking "LCKV" identifies LTC6930HDCB-5.00.

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-5.00#TRMPBF uniquely combines H-grade temperature range, 8-step digital division, and sub-0.1% accuracy - enabling one part to replace multiple crystals across diverse frequency points in mission-critical embedded systems.

Availability

LTC6930HDCB-5.00#TRMPBF is available at Aetrix Electronics and suitable for industrial sensor nodes, automotive body control modules, portable medical diagnostics, smart energy meters, and high-reliability embedded systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LTC6930HDCB-5.00#TRMPBF 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, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, acquired Linear Technology in 2017 to strengthen precision timing and power management portfolios.

The LTC6930 series was designed by Linear Technology as a family of ultralow-power, high-accuracy silicon oscillators targeting battery-operated and thermally demanding applications where quartz crystals fail due to shock, vibration, or temperature cycling.

FAQ

What is the guaranteed frequency accuracy of the LTC6930HDCB-5.00#TRMPBF over its full operating temperature range?

The LTC6930HDCB-5.00#TRMPBF guarantees ±0.1% frequency accuracy over its specified operating temperature range of –40°C to +125°C. This specification applies to all eight selectable output frequencies derived from the 5.000000MHz master oscillator and is validated across the full 1.7V to 5.5V supply range. The H-grade qualification ensures this accuracy without derating or additional calibration.

Can the LTC6930HDCB-5.00#TRMPBF generate frequencies outside the standard 39.0625kHz–5.000MHz range listed in Table 1?

No - the LTC6930HDCB-5.00#TRMPBF is factory-programmed with a fixed 5.000000MHz master oscillator and supports only the eight division ratios (1, 2, 4, 8, 16, 32, 64, 128) defined in Table 1. Frequencies such as 1MHz or 2.5MHz are supported; non-integer divisions like 3× or 5× are not possible. Custom master frequencies require ordering a different variant (e.g., LTC6930HDCB-8.19#TRMPBF).

How does the exposed thermal pad (Pin 9) on the LTC6930HDCB-5.00#TRMPBF DFN package affect thermal performance and PCB layout?

The exposed pad (Pin 9) on the LTC6930HDCB-5.00#TRMPBF must be soldered to a PCB ground plane to achieve θ_JA = 64°C/W and ensure safe operation at maximum ambient temperature. Failure to connect it results in excessive junction temperature rise, potential parametric shift, and reduced reliability. Layout requires thermal vias under the pad connected to inner-layer ground planes, with solder mask opening matching pad dimensions.

What is the maximum capacitive load the LTC6930HDCB-5.00#TRMPBF OUT pin can drive while maintaining specified jitter and start-up performance?

The LTC6930HDCB-5.00#TRMPBF OUT pin is characterized for C_LOAD = 5pF (equivalent to two HC logic inputs), where RMS period jitter is specified at 180ps. Driving >5pF increases supply current quadratically (I_SUPPLY ≈ C_LOAD × V_SWING × f_OSC) and may degrade jitter; 50pF loading draws ~2.2mA at 5MHz and requires local 0.1µF decoupling at Pins 6/8. Jitter degrades to ~0.25% RMS at 50pF, but start-up time remains <110µs.

Does the LTC6930HDCB-5.00#TRMPBF support dynamic frequency reconfiguration during system operation?

Yes - the LTC6930HDCB-5.00#TRMPBF supports glitch-free, single-cycle frequency reconfiguration via its DIVA/DIVB/DIVC pins. When divider settings change, the output transitions cleanly to the new frequency without runt pulses, slivers, or metastability. This allows real-time clock scaling in power-managed systems, provided setup/hold times (≥10ns) are met and supply voltage remains stable during transition.