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Analog Devices Inc. LTC1799HS5#WTRPBF
- Part No.:
- LTC1799HS5#WTRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Programmable Timers and Oscillators
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
LTC1799HS5#WTRPBF.pdf
- Description:
- 1KHZ TO 33MHZ RES SET
- Quantity:
- Payment:
- Shipping:
Inventory:2,027
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Product details
Overview
LTC1799HS5#WTRPBF from Analog Devices is a precision resistor-programmable oscillator IC in TSOT-23-5 package, delivering rail-to-rail CMOS square-wave output with 1kHz–33MHz frequency range, ≤1.5% frequency error (5kHz–20MHz), and ±40ppm/°C temperature stability. It serves as a low-cost, high-accuracy clock reference in automotive-grade switching power supplies and timing-critical sensor interfaces.
For engineers reviewing the LTC1799HS5#WTRPBF datasheet, LTC1799HS5#WTRPBF pinout, LTC1799HS5#WTRPBF application, or LTC1799HS5#WTRPBF equivalent, this page provides verified technical context, validated pin functions, confirmed automotive qualification (AEC-Q100), exact frequency-setting formula, and real-world design trade-offs for resistor-programmed oscillators.
Technical Context
The LTC1799HS5#WTRPBF implements a proprietary current-controlled master oscillator where V+–VSET is regulated to ≈1.13V ±7%, enabling linear fOSC vs RSET relationship without lookup tables. Its three-state DIV input selects ÷1/÷10/÷100 division, extending usable range across three decades while maintaining ≤2% error over –40°C to +125°C.
It features a 100Ω CMOS output driver with 6–14ns rise/fall times (dependent on supply and division ratio), fast start-up (<1ms), and 0.05%/V supply stability. The SET pin requires <10pF capacitance for specified jitter performance, and the internal bias circuit draws only ±5µA at DIV pin under floating detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Frequency Range | 1kHz to 33MHz (5V supply); selectable via RSET (3k–1MΩ) and DIV pin state (GND/float/V+) |
| Frequency Accuracy | ≤±1.5% (5kHz–20MHz, TA = 25°C); ≤±2% over full –40°C to +125°C operating range |
| Temperature Stability | ±0.004%/°C drift (RSET = 31.6kΩ); translates to ±40ppm/°C typical over –40°C to +125°C |
| Supply Range | 2.7V to 5.5V single supply; 0.05%/V supply stability ensures minimal frequency shift across voltage variation |
| Duty Cycle | 50% ±1% (1kHz–2MHz); 50% ±5% (2MHz–20MHz); guaranteed by 5V test, not extrapolated |
| Output Driver | 100Ω CMOS push-pull; delivers rail-to-rail swing with 6–14ns edge rates depending on division mode and V+ |
| Start-Up Time | tSTART ≈ RSET × 2.8µs/kΩ + 20µs; independent of DIV setting; e.g., 100kΩ → ~300µs to settle within 1% |
Pinout & Package
Package: 5-Lead Plastic TSOT-23 (ThinSOT™), 1mm profile, JEDEC MO-193 compliant, AEC-Q100 qualified for automotive use.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ (Pin 1) | Power supply input | 2.7V–5.5V supply; must be bypassed with 0.1µF capacitor to GND; noise sensitivity requires clean layout |
| GND (Pin 2) | Ground reference | Low-impedance connection to ground plane essential for stable frequency and low jitter |
| SET (Pin 3) | Frequency-setting resistor node | RSET connected between V+ and SET; voltage held at ≈1.13V below V+; <10pF capacitance required for spec'd jitter |
| DIV (Pin 4) | Three-state divider select | GND → ÷1; float → ÷10; V+ → ÷100; internal 5µA pull-up/pull-down enables open-circuit detection |
| OUT (Pin 5) | CMOS square-wave output | Drives 5kΩ/10pF loads; slew rate controlled per division mode to reduce EMI and supply bounce |
Key Features
| Feature | Design Value |
|---|---|
| Resistor-programmed frequency | Single external resistor (3k–1MΩ) sets fOSC via f = 10MHz × 10k / (N × RSET); eliminates trim caps and crystal cost |
| Automotive qualification | AEC-Q100 Grade H (–40°C to +125°C); controlled manufacturing, traceable sourcing, and reliability reports available |
| Fast, predictable start-up | Settles within 1% in <1ms for typical RSET; formula tSTART = RSET×2.8µs/kΩ + 20µs enables precise system timing budgeting |
| Low-power operation | 1mA typical supply current at 5V (RSET = 200kΩ, DIV = V+); scales with RSET and division ratio |
| Supply-noise resilience | 0.05%/V supply stability and low-frequency PSRR minimize frequency shift from regulator ripple |
Applications
| Switching Power Supply Clock Reference | Clock for Switched-Capacitor Filters |
|---|---|
Use Scenario: Provides timing signal for PWM controllers in DC/DC converters operating across automotive temperature range. IC Role / Device Role / Timing Role: Master clock generator replacing ceramic resonators or crystals; directly drives controller SYNC or OSC pins. Use Value: Eliminates crystal startup delay and aging drift; ±1.5% accuracy ensures consistent regulation loop bandwidth over life and temperature. |
Use Scenario: Sets sampling clock for precision analog filters in battery-powered instrumentation. IC Role / Device Role / Timing Role: Programmable clock source synchronized to ADC sampling; RSET adjusted to match filter cutoff requirements. Use Value: Enables dynamic filter tuning via resistor network or DAC-controlled current source; 50% ±1% duty cycle preserves filter linearity. |
| Fixed Crystal Oscillator Replacement | Temperature-to-Frequency Converter |
Use Scenario: Replaces 1–10MHz crystal oscillators in space-constrained industrial control modules. IC Role / Device Role / Timing Role: Drop-in timing source with identical board footprint (TSOT-23-5); no load capacitors or ESD protection needed. Use Value: Reduces BOM count by 3–5 components; 1mm profile saves PCB area versus 3.2×2.5mm crystal packages. |
Use Scenario: Converts thermistor resistance into proportional frequency for analog temperature sensing in engine control units. IC Role / Device Role / Timing Role: Core oscillator element in ratiometric measurement circuit; frequency output digitized by microcontroller timer capture. Use Value: ±40ppm/°C stability ensures <±0.5°C error over –40°C to +125°C; linear RSET-f mapping simplifies calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar resistor-programmed oscillator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6805CSA+ | Fixed 1MHz output; no RSET programming; SOT23-8 package; ±2% accuracy over –40°C to +85°C | Only suitable for fixed-frequency use; lacks DIV pin and wide-range programmability | Select when absolute lowest cost and simplicity outweigh need for frequency flexibility |
| SiT1533AI-H4-33E-32.768D | 32.768kHz MEMS oscillator; 20ppm stability; 1.5–3.6V supply; no external RSET; different frequency domain | Targets RTC and ultra-low-power sleep clocks-not general-purpose programmable timing | Choose only for low-frequency, low-power timing where MEMS reliability and small size are critical |
Compared with MAX6805CSA+ and SiT1533AI-H4-33E-32.768D, LTC1799HS5#WTRPBF uniquely combines automotive temperature range, resistor-based programmability across 1kHz–33MHz, and AEC-Q100 qualification-making it the sole option for variable-frequency, high-reliability embedded timing where crystal replacement or thermal compensation is required.
Availability
LTC1799HS5#WTRPBF is available at Aetrix Electronics and suitable for automotive powertrain control, industrial sensor signal conditioning, and medical device timing circuits requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC1799HS5#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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC1799HS5#WTRPBF belongs to Analog Devices' precision timing IC product line, designed specifically for automotive and industrial applications demanding accurate, programmable, and robust clock generation without crystals or external trimming.
FAQ
What is the maximum operating temperature for LTC1799HS5#WTRPBF?
LTC1799HS5#WTRPBF is rated for –40°C to +125°C operating temperature and is AEC-Q100 qualified for automotive Grade H applications. This rating is confirmed in the Absolute Maximum Ratings table and Order Information section of the Rev. E datasheet, where "H" explicitly denotes the –40°C to +125°C grade.
How does the DIV pin function on LTC1799HS5#WTRPBF?
The DIV pin on LTC1799HS5#WTRPBF is a three-state input that selects the output divider ratio: tied to GND → ÷1; left floating (or driven to midsupply) → ÷10; tied to V+ → ÷100. Internal 5µA current sources detect the state, and the pin must be shielded or bypassed with 1nF to ground when floating to prevent noise coupling.
What is the recommended RSET range for optimal accuracy with LTC1799HS5#WTRPBF?
For optimal accuracy, LTC1799HS5#WTRPBF should use RSET between 10kΩ and 200kΩ, as stated in the Theory of Operation and Applications Information sections. This range guarantees ≤±1.5% error at 25°C and supports stable operation across the full –40°C to +125°C range with minimal drift.
Does LTC1799HS5#WTRPBF require external bypass capacitors?
Yes - LTC1799HS5#WTRPBF requires a 0.1µF ceramic capacitor placed directly between V+ (Pin 1) and GND (Pin 2), as specified in the PIN FUNCTIONS section. This bypass is mandatory for stable operation and achieving specified frequency accuracy and jitter performance.
Is LTC1799HS5#WTRPBF pin-compatible with other variants like LTC1799IS5#TRPBF?
Yes - LTC1799HS5#WTRPBF shares identical TSOT-23-5 pinout and electrical behavior with all LTC1799 S5 variants (C/I/H grades). Differences are limited to temperature rating and qualification level; no PCB layout changes are needed when upgrading from I-grade to H-grade automotive parts.
LTC1799HS5#WTRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Oscillator, Silicon
- Count:
- -
- Frequency:
- 1kHz ~ 33MHz
- Voltage - Supply:
- 2.7V ~ 5.5V
- Current - Supply:
- 700 µA
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- TSOT-23-5
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1799HS5#WTRPBF FAQ
1.How can I place an order for LTC1799HS5#WTRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1799HS5#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 LTC1799HS5#WTRPBF reliable?
The price and inventory of LTC1799HS5#WTRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1799HS5#WTRPBF is usually 5 days.
3.What payment methods are accepted for LTC1799HS5#WTRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1799HS5#WTRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1799HS5#WTRPBF?
LTC1799HS5#WTRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1799HS5#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 LTC1799HS5#WTRPBF?
For technical support, including LTC1799HS5#WTRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1799HS5#WTRPBF requirements.
6.How does Aetrix verify that LTC1799HS5#WTRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1799HS5#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 LTC1799HS5#WTRPBF meets industry standards.
7.What is the process for return or replacement of LTC1799HS5#WTRPBF?
All LTC1799HS5#WTRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1799HS5#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 LTC1799HS5#WTRPBF part is unused and in its original packaging.
Return procedure for LTC1799HS5#WTRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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