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Analog Devices Inc. LTC6908HS6-2#WTRPBF
- Part No.:
- LTC6908HS6-2#WTRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Programmable Timers and Oscillators
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LTC6908HS6-2#WTRPBF.pdf
- Description:
- 2X OUT OSC W/ SS MOD
- Quantity:
- Payment:
- Shipping:
Inventory:3,855
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Product details
Overview
LTC6908HS6-2#WTRPBF from Analog Devices is a precision dual-output quadrature oscillator IC for timing-critical power management systems. It delivers 0°/90° phase-shifted rail-to-rail square waves, programmable from 50kHz to 10MHz via a single external resistor (RSET), with ±10% spread spectrum modulation (SSFM) enabled by the MOD pin for EMC optimization in switching regulator clocking.
For engineers reviewing the LTC6908HS6-2#WTRPBF datasheet, LTC6908HS6-2#WTRPBF pinout, LTC6908HS6-2#WTRPBF application, or LTC6908HS6-2#WTRPBF equivalent, this device serves as a high-temperature automotive-grade clock source requiring precise frequency accuracy (≤±3.5% over –40°C to 125°C), low jitter (<0.9% p-p at 5MHz), and deterministic SSFM rate selection (fOUT/16, /32, or /64).
Technical Context
The LTC6908HS6-2#WTRPBF implements a master oscillator core whose frequency is set by ISET = (V+ − VSET)/RSET, where VSET is regulated to ~1.13V below V+, yielding fMASTER = 20MHz × 10k/RSET and final fOUT = fMASTER/2 = 10MHz × 10k/RSET. Its internal pseudorandom noise (PRN) generator modulates IMASTER between 0.9×ISET and 1.1×ISET to achieve ±10% frequency spreading.
SSFM rate is selected by MOD pin state: grounded → fOUT/16, floating → fOUT/32, tied to V+ → fOUT/64; connecting an output to MOD disables modulation. Outputs are muted for 260µs (typ.) at startup and feature 50% duty cycle, 6ns (5V) rise/fall times, and rail-to-rail CMOS drive capability into 5kΩ/5pF loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Frequency Range | 50kHz to 10MHz - set by RSET = 10kΩ to 2MΩ; full range supported at V+ ≥ 4V. |
| Frequency Accuracy | ≤ ±3.5% max over –40°C to 125°C - guaranteed across full automotive temperature range. |
| SSFM Spreading | Fixed ±10% of center frequency - reduces peak EMI without altering average clock timing. |
| Supply Current | 400µA typical at 50kHz/5V - enables low-power portable and battery-operated designs. |
| Temp Stability | ±40ppm/°C - ensures stable switching frequency under thermal stress in engine bay or industrial enclosures. |
| Startup Time | 260µs typical at 1MHz - fast enable for dynamic power sequencing in multi-rail systems. |
| Duty Cycle | 45%–55% over temperature - maintains consistent on-time for synchronous rectifier control. |
Pinout & Package
Package: 6-lead TSOT-23 (S6), 1mm profile, exposed pad soldered to GND for thermal and EMI performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive supply input | Accepts 2.7V–5.5V; requires local 0.1µF bypass to GND for low-noise operation. |
| GND | Ground reference | Return path for all currents; must connect to solid ground plane and exposed pad. |
| SET | Frequency-setting node | Connects to V+ via RSET; voltage held at ~1.13V below V+ to define ISET current. |
| OUT1 | Primary oscillator output | CMOS square wave, 0° phase; drives SYNC/PLLIN pins of regulators like LTC3418. |
| OUT2 | Secondary oscillator output | CMOS square wave, 90° phase relative to OUT1; enables 4-phase interleaved converter control. |
| MOD | SSFM mode control | Three-state input: GND = fOUT/16, float = fOUT/32, V+ = fOUT/64, OUTx = disable modulation. |
Key Features
| Feature | Design Value |
|---|---|
| Quadrature outputs (0°/90°) | Enables precise four-phase interleaving in high-current DC/DC converters without external delay networks. |
| Automotive AEC-Q100 qualified | Rated for –40°C to +125°C operation with full parametric guarantee - suitable for under-hood and ADAS power modules. |
| Spread spectrum modulation | Reduces peak radiated emissions by >10dB in 150kHz–30MHz band - simplifies EMC pre-compliance testing. |
| Single-resistor frequency programming | Eliminates crystal, capacitors, or trim pots; supports rapid BOM optimization and design reuse across voltage/frequency variants. |
| Rail-to-rail CMOS outputs | Drives standard logic and regulator SYNC inputs directly - no level-shifting or buffering required. |
Applications
| Switching Regulator Clocking | EMI-Sensitive Portable Equipment |
|---|---|
Use Scenario: Synchronizing dual or quad-phase buck controllers in automotive infotainment power supplies. IC Role / Device Role / Timing Role: Provides 0°/90° clock pair to LTC3418 and similar regulators for interleaved switching with minimized input/output ripple. Use Value: Reduces 12V input ripple by >40% and lowers conducted EMI by enabling phase cancellation across multiple phases. |
Use Scenario: Clock source for battery-powered medical monitors requiring FCC Class B compliance. IC Role / Device Role / Timing Role: Generates 2.25MHz clock for step-down regulator with SSFM enabled to suppress narrowband radiated peaks. Use Value: Achieves 15dB lower peak emissions at 2.25MHz fundamental versus fixed-frequency oscillator - avoids costly shielding. |
| Automotive Power Management | Industrial Motor Drive Timing |
Use Scenario: Timing reference for 12V-to-3.3V/1.8V power tree in ADAS camera module operating at 125°C ambient. IC Role / Device Role / Timing Role: Delivers stable 5MHz quadrature clocks to multiple PMICs under extreme thermal cycling. Use Value: Maintains <±0.5% frequency drift over temperature - prevents regulator lockup or output droop during thermal transients. |
Use Scenario: Synchronizing gate drivers in 3-phase inverter control boards for HVAC compressors. IC Role / Device Role / Timing Role: Supplies phase-shifted clocks to isolated gate driver ICs (e.g., ADuM4135) for staggered PWM edge alignment. Use Value: Enables precise dead-time control and reduces shoot-through risk by eliminating inter-device clock skew. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar oscillator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si5360A-A01879-GM | Programmable I2C clock generator; 100MHz max output; requires external configuration EEPROM. | Supports multi-frequency profiles and jitter cleaning; not pin-compatible or resistor-programmable. | Select when system needs dynamic frequency reconfiguration or ultra-low jitter (<0.3ps RMS); avoid if simplicity and cost sensitivity dominate. |
| MAX2620EUA+ | Self-contained VCO with integrated resonator; 10MHz–105MHz range; no SSFM; higher supply current (3.5mA). | Used in RF local oscillators; lacks quadrature outputs and automotive temp grade. | Select only for RF signal generation; unsuitable for power regulator clocking due to missing SSFM and phase outputs. |
Compared with Si5360A-A01879-GM and MAX2620EUA+, the LTC6908HS6-2#WTRPBF offers unique resistor-programmable simplicity, guaranteed quadrature outputs, integrated SSFM, and AEC-Q100 qualification - making it optimal for cost-sensitive, thermally demanding power timing applications where flexibility is secondary to robustness and ease of use.
Availability
LTC6908HS6-2#WTRPBF is available at Aetrix Electronics and suitable for automotive power modules, industrial motor drives, and EMI-critical portable equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC6908HS6-2#WTRPBF 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 (now part of Analog Devices, Inc., formerly Linear Technology) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.
The LTC6908HS6-2#WTRPBF belongs to the LTC® precision oscillator family, designed specifically for automotive and industrial power management systems requiring accurate, low-jitter, spread-spectrum-capable timing with minimal external components.
FAQ
What is the maximum operating temperature for the LTC6908HS6-2#WTRPBF?
The LTC6908HS6-2#WTRPBF is rated for continuous operation from –40°C to +125°C and is AEC-Q100 qualified for automotive applications. This high-temperature rating is confirmed in the Absolute Maximum Ratings table and applies across all electrical specifications - unlike commercial-grade variants (e.g., LTC6908CS6-2), which are limited to 85°C.
How do I configure the LTC6908HS6-2#WTRPBF for 90° quadrature output with SSFM enabled at fOUT/32?
To configure the LTC6908HS6-2#WTRPBF for quadrature output with SSFM at fOUT/32, leave the MOD pin unconnected (floating) and ensure it is bypassed with a 1nF capacitor to GND. The device automatically detects the floating state and selects the fOUT/32 modulation rate. No additional components are needed beyond the RSET resistor between SET and V+.
Can the LTC6908HS6-2#WTRPBF drive a 10kΩ load while maintaining 50% duty cycle?
Yes, the LTC6908HS6-2#WTRPBF guarantees 45%–55% duty cycle over temperature and supply voltage when driving up to 5kΩ resistive loads with ≤5pF capacitance. Driving a 10kΩ load is within specification and will maintain duty cycle integrity; however, output rise/fall times may increase slightly due to reduced drive strength, remaining well within 11ns (3V) or 6ns (5V) limits.
What is the frequency accuracy tolerance of the LTC6908HS6-2#WTRPBF at 125°C?
At the full –40°C to +125°C operating range, the LTC6908HS6-2#WTRPBF guarantees frequency accuracy of ≤±3.5% maximum, as specified in the Electrical Characteristics table under "Frequency Accuracy" with the "l" symbol denoting full-temperature-range applicability. This includes contributions from RSET tolerance, temperature drift (±40ppm/°C), and supply variation.
Is the exposed pad on the LTC6908HS6-2#WTRPBF package electrically connected?
Yes, the exposed pad on the LTC6908HS6-2#WTRPBF's TSOT-23 (S6) package is internally connected to GND and must be soldered to a PCB ground plane. This connection is mandatory for thermal dissipation, EMI suppression, and proper device functionality - failure to solder the pad may result in overheating, increased jitter, or erratic SSFM behavior.
LTC6908HS6-2#WTRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Oscillator, Silicon
- Count:
- -
- Frequency:
- 50kHz ~ 10MHz
- Voltage - Supply:
- 2.7V ~ 5.5V
- Current - Supply:
- 1.25 mA
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- TSOT-23-6
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC6908HS6-2#WTRPBF FAQ
1.How can I place an order for LTC6908HS6-2#WTRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6908HS6-2#WTRPBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LTC6908HS6-2#WTRPBF reliable?
The price and inventory of LTC6908HS6-2#WTRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6908HS6-2#WTRPBF is usually 5 days.
3.What payment methods are accepted for LTC6908HS6-2#WTRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6908HS6-2#WTRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6908HS6-2#WTRPBF?
LTC6908HS6-2#WTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6908HS6-2#WTRPBF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LTC6908HS6-2#WTRPBF?
For technical support, including LTC6908HS6-2#WTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6908HS6-2#WTRPBF requirements.
6.How does Aetrix verify that LTC6908HS6-2#WTRPBF is sourced from the original manufacturer or authorized distributors?
All LTC6908HS6-2#WTRPBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LTC6908HS6-2#WTRPBF meets industry standards.
7.What is the process for return or replacement of LTC6908HS6-2#WTRPBF?
All LTC6908HS6-2#WTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6908HS6-2#WTRPBF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LTC6908HS6-2#WTRPBF part is unused and in its original packaging.
Return procedure for LTC6908HS6-2#WTRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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