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Analog Devices Inc. LTC6990IDCB#TRPBF
- Part No.:
- LTC6990IDCB#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Programmable Timers and Oscillators
- Package:
- 6-WFDFN Exposed Pad
- Datasheet:
-
LTC6990IDCB#TRPBF.pdf
- Description:
- IC OSC SILICON PROG 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,522
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Product details
Overview
LTC6990IDCB#TRPBF from Analog Devices is a precision voltage-controlled silicon oscillator (VCO) in a 6-lead DFN package, delivering programmable output frequencies from 488 Hz to 2 MHz with ±0.8% typical accuracy over temperature, 50% duty cycle square wave output, and synchronized enable/disable control. It serves as a low-power, high-stability timing source in embedded control, sensor interface, and automotive subsystems where crystal replacement or analog modulation is required.
For engineers reviewing the LTC6990IDCB#TRPBF datasheet, LTC6990IDCB#TRPBF pinout, LTC6990IDCB#TRPBF application, or LTC6990IDCB#TRPBF equivalent, key selection criteria include its 2.25V–5.5V single-supply operation, 72 µA supply current at 100 kHz, 500 µs start-up time, VCO bandwidth >300 kHz at 1 MHz, and AEC-Q100 qualification for industrial and automotive environments.
Technical Context
The LTC6990IDCB#TRPBF implements a master oscillator (1 MHz max) controlled by SET-pin current (ISET = VSET/RSET, VSET ≈ 1.00 V), followed by an 8-step programmable divider (NDIV = 1, 2, 4…128) selected via a V+-referenced 4-bit ADC on the DIV pin. Its internal regulation ensures frequency stability independent of VSET drift when using RSET.
It supports both fixed-frequency (single RSET) and voltage-controlled modes (dual-resistor VCTRL configuration), with glitch-free output enable synchronization to the master clock, selectable Hi-Z or forced-low disable state, and CMOS output capable of sourcing/sinking 20 mA. The device operates across –40°C to +85°C and meets AEC-Q100 Grade 3 requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Frequency Range | 488 Hz to 2 MHz - covers low-speed control loops and mid-frequency clocking without external crystals. |
| Frequency Accuracy | ±0.8% typ (RSET = 50k–800kΩ) - enables precise timing without calibration in production. |
| Supply Voltage | 2.25 V to 5.5 V - compatible with 3.3 V and 5 V logic rails and battery-powered systems. |
| Supply Current | 72 µA at 100 kHz - allows ultra-low-power operation in always-on sensor nodes. |
| Start-Up Time | 500 × tMASTER (typ. 500 µs at 1 MHz master) - ensures rapid system readiness after power-on reset. |
| VCO Bandwidth | >300 kHz at 1 MHz fOUT - supports fast frequency modulation for PWM dimming or FSK signaling. |
| Duty Cycle | 50% ±3% - delivers symmetrical square waves critical for clock distribution and sampling. |
Pinout & Package
Package: 6-lead (2 mm × 3 mm) plastic DFN with exposed pad (connected to GND); 0.5 mm pitch; RoHS-compliant, lead-free finish; thermal resistance θJA = 64°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive supply input | Accepts 2.25–5.5 V; requires local 0.1 µF bypass to GND for noise immunity. |
| DIV | Programmable divider and Hi-Z mode input | V+-referenced 4-bit ADC input; sets NDIV (1–128) and disables output state (Hi-Z/low). |
| SET | Frequency-setting input | Regulated to 1.00 V ±30 mV; ISET = VSET/RSET programs master oscillator (1.25–40 µA range). |
| OE | Output enable control | Asynchronous disable with synchronous enable; hysteresis prevents false triggering on slow edges. |
| GND | Ground reference | Low-inductance connection point for all bypass caps and signal returns. |
| OUT | CMOS oscillator output | Full-rail swing (GND to V+); 30 Ω output impedance; 20 mA drive capability. |
Key Features
| Feature | Design Value |
|---|---|
| Single-resistor frequency programming | Enables ±0.8% accuracy without trimming or calibration-reduces BOM count and layout complexity. |
| Voltage-controlled oscillator (VCO) mode | Supports linear frequency modulation via second resistor; bandwidth >300 kHz enables real-time control. |
| Synchronized output enable | Eliminates pulse slivers during enable; guarantees first-edge integrity for deterministic timing. |
| Selectable Hi-Z or low-disable state | Allows "wired-OR" bus sharing or safe output isolation in multi-source systems. |
| AEC-Q100 qualified (Grade 3) | Validated for automotive under-hood and infotainment applications (-40°C to +85°C ambient). |
Applications
| Motor Control Feedback Timing | Automotive Sensor Signal Conditioning |
|---|---|
Use Scenario: Generating precise PWM carrier signals for BLDC motor gate drivers in ECU modules. IC Role / Device Role / Timing Role: Fixed-frequency oscillator providing stable 20–100 kHz timing base for PWM generation. Use Value: Eliminates crystal cost and board space while maintaining <±1% frequency stability over temperature and supply variation. |
Use Scenario: Providing clock and modulation reference for MEMS pressure/temperature sensor interfaces in ADAS modules. IC Role / Device Role / Timing Role: VCO generating swept-frequency excitation for resonant sensor readout. Use Value: Enables >300 kHz modulation bandwidth for fast-response FSK-based transduction without external PLL. |
| Industrial PLC Input Debouncing | Portable Medical Device Clocking |
Use Scenario: Generating configurable debounce intervals (1–100 ms) for digital inputs in DIN-rail controllers. IC Role / Device Role / Timing Role: Programmable low-frequency oscillator setting RC-free timing windows via resistor selection. Use Value: Replaces discrete RC timers with ±0.8% repeatability across temperature, improving long-term reliability. |
Use Scenario: Supplying low-jitter, low-power clock to microcontroller and ADC in handheld glucose meters. IC Role / Device Role / Timing Role: 1–2 MHz fixed-frequency source enabling accurate sampling and sleep/wake timing. Use Value: 72 µA current at 100 kHz extends battery life beyond 5 years in intermittent-use devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage-controlled oscillator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX974ACSA+ | Wider VCO range (100 Hz–10 MHz), higher supply current (120 µA min), no integrated divider, SO-8 package. | Requires external divider for sub-MHz outputs; less suitable for space-constrained DFN designs. | Choose for wider tuning range where board area permits SO-8 and higher power is acceptable. |
| SiT1533AI-H4-33E-32.768E | Fixed 32.768 kHz MEMS oscillator; no VCO or programmability; ±20 ppm stability; 1.5–3.6 V supply. | Only replaces crystal in RTC applications; lacks frequency agility or modulation capability. | Choose only for static low-power timing; not a functional substitute for VCO or programmable operation. |
Compared with MAX974ACSA+ and SiT1533AI-H4-33E-32.768E, the LTC6990IDCB#TRPBF uniquely combines programmable division, VCO linearity, AEC-Q100 qualification, and DFN packaging-making it optimal for automotive and industrial systems requiring both flexibility and robustness.
Availability
LTC6990IDCB#TRPBF is available at Aetrix Electronics and suitable for motor control feedback timing, automotive sensor signal conditioning, and industrial PLC input debouncing requiring stable component supply, AEC-Q100 compliance, and long-lifecycle support.
Supply support for LTC6990IDCB#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.
The LTC6990IDCB#TRPBF belongs to the TimerBlox® family of silicon timing devices, designed specifically to replace quartz crystals and ceramic resonators with programmable, low-power, and vibration-immune oscillators for harsh-environment applications.
FAQ
What is the operating temperature range for the LTC6990IDCB#TRPBF?
The LTC6990IDCB#TRPBF is rated for –40°C to +85°C ambient operation and is AEC-Q100 qualified (Grade 3). This specification is guaranteed across the full range, with electrical characteristics tested per the datasheet conditions. The device uses internal thermal compensation to maintain frequency stability within ±0.005%/°C drift, making it suitable for under-hood automotive and industrial control environments where thermal cycling occurs.
How do I configure the LTC6990IDCB#TRPBF for fixed-frequency operation?
To configure the LTC6990IDCB#TRPBF for fixed-frequency operation, connect a precision resistor (RSET) between the SET pin and GND, and use a resistor divider on the DIV pin to set the desired NDIV value (1–128). Calculate RSET using RSET = (1 MHz × 50 kΩ) / (NDIV × fOUT). For example, for 20 kHz with NDIV = 4, RSET = 625 kΩ. Use 0.5% metal-film resistors for best accuracy. The LTC6990IDCB#TRPBF then delivers ±0.8% typical frequency accuracy without calibration.
Does the LTC6990IDCB#TRPBF support voltage-controlled oscillator (VCO) functionality?
Yes, the LTC6990IDCB#TRPBF supports true linear VCO operation using two external resistors: one (RSET) sets the center frequency, and a second (RVCO) connected to the SET pin provides voltage-controlled tuning. The VCO transfer function is fOUT = 2 MHz − VCTRL × 1 MHz/V, with >300 kHz modulation bandwidth at 1 MHz output. This enables direct FSK, PWM dimming control, or sensor excitation without external op-amps or filters.
What is the purpose of the DIV pin on the LTC6990IDCB#TRPBF?
The DIV pin on the LTC6990IDCB#TRPBF connects to an internal V+-referenced 4-bit ADC that determines both the programmable divider ratio (NDIV = 1, 2, 4…128) and the output disable behavior (Hi-Z or forced-low). A resistor divider between V+ and GND generates VDIV; its ratio to V+ selects a DIVCODE (0–15), which maps directly to NDIV and the Hi-Z bit. Capacitance on this pin must remain below 100 pF to ensure fast settling and reliable code detection.
Can the LTC6990IDCB#TRPBF be used in automotive applications?
Yes, the LTC6990IDCB#TRPBF is AEC-Q100 qualified (Grade 3) for automotive applications and specified from –40°C to +85°C. It features built-in power-on reset, glitch-free enable synchronization, and robust supply rejection (±0.06%/V drift over 2.25–4.5 V), making it suitable for engine control, body electronics, and ADAS sensor interfaces. Its DFN package offers superior vibration resistance compared to crystal-based solutions, addressing key automotive reliability requirements.
LTC6990IDCB#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 ~ 85°C
- Supplier Device Package:
- 6-DFN (2x3)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC6990IDCB#TRPBF FAQ
1.How can I place an order for LTC6990IDCB#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC6990IDCB#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 LTC6990IDCB#TRPBF reliable?
The price and inventory of LTC6990IDCB#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC6990IDCB#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC6990IDCB#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC6990IDCB#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC6990IDCB#TRPBF?
LTC6990IDCB#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC6990IDCB#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 LTC6990IDCB#TRPBF?
For technical support, including LTC6990IDCB#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC6990IDCB#TRPBF requirements.
6.How does Aetrix verify that LTC6990IDCB#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC6990IDCB#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 LTC6990IDCB#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC6990IDCB#TRPBF?
All LTC6990IDCB#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC6990IDCB#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 LTC6990IDCB#TRPBF part is unused and in its original packaging.
Return procedure for LTC6990IDCB#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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