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Analog Devices Inc. LTC6990HDCB#TRPBF
- Part No.:
- LTC6990HDCB#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Programmable Timers and Oscillators
- Package:
- 6-WFDFN Exposed Pad
- Datasheet:
-
LTC6990HDCB#TRPBF.pdf
- Description:
- IC OSC SILICON PROG 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,241
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Product details
Overview
LTC6990HDCB#TRPBF from Analog Devices is a precision voltage-controlled silicon oscillator (VCO) in the TimerBlox® family, operating from –40°C to 125°C. It delivers programmable output frequencies from 488 Hz to 2 MHz with ±1.5% max frequency accuracy over temperature, 50% duty cycle square wave output, and CMOS-compatible 20 mA drive capability. It serves as a low-power, high-stability replacement for crystal oscillators in automotive timing and industrial sensor interface circuits.
For engineers reviewing the LTC6990HDCB#TRPBF datasheet, LTC6990HDCB#TRPBF pinout, LTC6990HDCB#TRPBF application, or LTC6990HDCB#TRPBF equivalent, key selection criteria include its 6-lead DFN (2 mm × 3 mm) package, resistor-programmable divider (NDIV = 1–128), VSET-regulated 1 V SET pin, synchronized enable function, and AEC-Q100 qualification for under-hood automotive use.
Technical Context
The LTC6990HDCB#TRPBF integrates a master oscillator (1 MHz max) controlled by ISET current sourced through an internal 1 V-regulated SET pin, with a programmable digital divider (NDIV) selecting one of eight division ratios. Its DIV pin uses a V+-referenced 4-bit ADC to decode resistor-divider voltage into both NDIV and Hi-Z mode configuration.
It features glitch-free output enable synchronization, selectable high-impedance or forced-low disable states, and supports both fixed-frequency (single RSET) and voltage-controlled (dual-resistor VCO) operation. The device achieves <72 µA supply current at 100 kHz and 500 µs start-up time, with VCO bandwidth >300 kHz at 1 MHz output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Frequency Range | 488 Hz to 2 MHz - covers low-speed sensor clocking up to high-resolution PWM generation |
| Frequency Accuracy | ±1.5% max over –40°C to 125°C - enables reliable timing without external calibration |
| Supply Voltage | 2.25 V to 5.5 V - compatible with 3.3 V and 5 V industrial and automotive systems |
| Supply Current | 71 µA typical at 5.5 V, NDIV = 128, RSET = 800 kΩ - supports ultra-low-power battery-backed applications |
| Duty Cycle | 47%–53% over full range - ensures balanced timing for symmetric logic or gate drivers |
| Output Drive | ±20 mA CMOS - directly drives logic inputs, LEDs, or small MOSFET gates without buffer |
| Operating Temp | –40°C to 125°C - qualified per AEC-Q100 Grade H for engine control, ADAS, and powertrain modules |
Pinout & Package
Package: 6-lead (2 mm × 3 mm) plastic DFN (DCB), exposed pad connected to GND. RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive supply input | 2.25 V–5.5 V rail; requires local 0.1 µF bypass to GND for noise immunity |
| DIV | Programmable divider & Hi-Z mode select | V+-referenced 4-bit ADC input; sets NDIV (1–128) and output state when disabled |
| SET | Frequency-setting current input | Internally regulated to 1.00 V ±30 mV; ISET = VSET/RSET programs master oscillator |
| OE | Output enable control | Asynchronous disable with synchronized enable; hysteresis prevents false triggering |
| GND | Ground reference | Low-inductance connection required; ties to exposed thermal pad |
| OUT | CMOS oscillator output | Full-rail swing (GND to V+); 30 Ω output impedance; sources/sinks 20 mA |
Key Features
| Feature | Design Value |
|---|---|
| Voltage-controlled oscillator (VCO) mode | Linear frequency modulation via second resistor at SET pin; tunable center frequency and range |
| Glitch-free output enable | Synchronized activation eliminates pulse slivers; first output edge has guaranteed width |
| Selectable disable state | Hi-Z or forced-low output determined by DIVCODE MSB - enables wired-OR bus sharing |
| Low-jitter performance | 0.022% P-P period jitter at NDIV = 128 - suitable for precision timing and clock distribution |
| AEC-Q100 qualified | Grade H (–40°C to 125°C) - validated for automotive powertrain, chassis, and body electronics |
Applications
| Engine Control Unit (ECU) Timing | Industrial Sensor Interface |
|---|---|
Use Scenario: Provides precise clock signal for crankshaft/camshaft position sensor sampling and fuel injection timing in gasoline/diesel ECUs. IC Role / Device Role / Timing Role: Primary system clock generator replacing quartz oscillators in harsh under-hood environments. Use Value: AEC-Q100 Grade H rating and ±1.5% frequency stability over –40°C to 125°C ensure deterministic timing under thermal stress. |
Use Scenario: Generates synchronous sampling clocks for analog front-ends in pressure, temperature, and flow sensors deployed in factory automation. IC Role / Device Role / Timing Role: Low-power, resistor-programmable oscillator enabling flexible update rates without firmware changes. Use Value: 72 µA supply current at 100 kHz and 500 µs start-up allow rapid wake-up from sleep modes in battery-powered wireless sensors. |
| Automotive ADAS Camera Sync | Medical Infusion Pump Clock |
Use Scenario: Supplies frame-sync and pixel-clock signals for multi-camera fusion modules in lane-departure warning and automatic emergency braking systems. IC Role / Device Role / Timing Role: VCO-mode oscillator generating adjustable pixel clocks aligned to image sensor requirements. Use Value: >300 kHz VCO bandwidth at 1 MHz output enables real-time clock adjustment for dynamic exposure control. |
Use Scenario: Drives microcontroller and motor driver timing in portable infusion pumps requiring long-term accuracy and low EMI. IC Role / Device Role / Timing Role: Fixed-frequency oscillator delivering stable 1 MHz clock with 50% duty cycle for PWM motor control. Use Value: 0.022% P-P jitter at NDIV = 128 minimizes audible motor noise and ensures precise fluid delivery rate. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage-controlled oscillator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SiT1533AI-H4-33E-32.768E | 32.768 kHz MEMS oscillator; fixed frequency only; no VCO or divider programming | Targeted at RTC backup and low-power sleep clocks, not programmable timing or modulation | Choose only if fixed 32.768 kHz is sufficient and ultra-low power (<1 µA) is critical |
| MAX974ESA+ | Single-supply comparator with rail-to-rail output; no oscillator function or frequency programming | Used in threshold detection or window comparators, not timing generation | Not a functional alternative; consider only for non-timing signal conditioning roles |
Compared with SiT1533AI-H4-33E-32.768E and MAX974ESA+, the LTC6990HDCB#TRPBF uniquely combines wide-range programmability (488 Hz–2 MHz), VCO capability, and automotive-grade reliability in a single IC-neither alternative offers frequency synthesis, divider control, or AEC-Q100 qualification.
Availability
LTC6990HDCB#TRPBF is available at Aetrix Electronics and suitable for automotive ECU timing, industrial sensor interface, and medical infusion pump designs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC6990HDCB#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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC6990HDCB#TRPBF belongs to the TimerBlox® family-designed specifically for robust, low-component-count timing solutions where crystal oscillators are impractical due to size, cost, or environmental constraints.
FAQ
What is the operating temperature range for the LTC6990HDCB#TRPBF?
The LTC6990HDCB#TRPBF is rated for continuous operation from –40°C to 125°C and is AEC-Q100 qualified for Grade H automotive applications. This specification is guaranteed across the full range, unlike commercial-grade variants (e.g., LTC6990CDCB#TRPBF), making it suitable for under-hood engine control and transmission control units where thermal extremes are routine. The LTC6990HDCB#TRPBF maintains ±1.5% frequency accuracy within this envelope.
How do I configure the LTC6990HDCB#TRPBF for fixed-frequency operation?
To configure the LTC6990HDCB#TRPBF for fixed-frequency operation, connect a precision resistor (RSET) between the SET pin and GND, and set the DIV pin voltage using a resistor divider to select NDIV. Use RSET = (1 MHz × 50 kΩ) / (NDIV × fOUT) - for example, 20 kHz with NDIV = 4 requires RSET ≈ 625 kΩ. The LTC6990HDCB#TRPBF achieves ±1.5% accuracy with 1% resistors and operates down to 488 Hz with NDIV = 128.
Does the LTC6990HDCB#TRPBF support voltage-controlled oscillator (VCO) functionality?
Yes, the LTC6990HDCB#TRPBF supports true linear VCO operation: applying a variable voltage to the SET pin via a second resistor (RVCO) modulates output frequency around a center point set by RSET. The VCO bandwidth exceeds 300 kHz at 1 MHz output, enabling real-time frequency tuning for applications like camera sync or adaptive PWM. The LTC6990HDCB#TRPBF datasheet provides transfer function equations and layout guidance for stable VCO implementation.
What is the purpose of the DIV pin on the LTC6990HDCB#TRPBF?
The DIV pin on the LTC6990HDCB#TRPBF serves two simultaneous functions: it selects the programmable frequency divider ratio (NDIV = 1, 2, 4…128) and determines the output state during disable (Hi-Z or forced-low) via its MSB. An internal V+-referenced 4-bit ADC reads the DIV pin voltage (VDIV) to decode a DIVCODE value. For reliable operation, VDIV must be stable within ±1.5% of the ideal ratio (DIVCODE + 0.5)/16, and total pin capacitance must remain below 100 pF.
Can the LTC6990HDCB#TRPBF replace quartz oscillators in space-constrained designs?
Yes, the LTC6990HDCB#TRPBF is explicitly designed as a drop-in replacement for fixed-frequency crystal and ceramic oscillators in space-constrained applications. Its 2 mm × 3 mm DFN package occupies ~25% of the footprint of a standard 3.2 mm × 2.5 mm crystal oscillator, eliminates external load capacitors, and avoids mechanical shock sensitivity. The LTC6990HDCB#TRPBF delivers comparable frequency stability (±1.5%) with superior start-up time (500 µs vs. 1–10 ms) and wider supply range (2.25 V–5.5 V).
LTC6990HDCB#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- TimerBlox®
- Package/Case:
- 6-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Oscillator, Silicon
- Count:
- -
- Frequency:
- 488Hz ~ 2MHz
- Voltage - Supply:
- 2.25V ~ 5.5V
- Current - Supply:
- 235 µA
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 6-DFN (2x3)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC6990HDCB#TRPBF FAQ
1.How can I place an order for LTC6990HDCB#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6990HDCB#TRPBF 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 LTC6990HDCB#TRPBF reliable?
The price and inventory of LTC6990HDCB#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6990HDCB#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC6990HDCB#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6990HDCB#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6990HDCB#TRPBF?
LTC6990HDCB#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6990HDCB#TRPBF 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 LTC6990HDCB#TRPBF?
For technical support, including LTC6990HDCB#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6990HDCB#TRPBF requirements.
6.How does Aetrix verify that LTC6990HDCB#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC6990HDCB#TRPBF 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 LTC6990HDCB#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC6990HDCB#TRPBF?
All LTC6990HDCB#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6990HDCB#TRPBF, 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 LTC6990HDCB#TRPBF part is unused and in its original packaging.
Return procedure for LTC6990HDCB#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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