LTC1799 - 1kHz to 33MHz Resistor Set SOT-23 Oscillator

Features

• Click Here For LTC1799 Evaluation Kits
• One External Resistor Sets the Frequency
• Fast Start-Up Time: <1ms
• 1kHz to 33MHz Frequency Range
• Frequency Error ≤1.5% 5kHz to 20MHz (TA = 25°C)
• Frequency Error ≤ 2% 5kHz to 20MHz (TA = 0°C to 70°C)
• ±40ppm/°C Temperature Stability
• 0.05%/V Supply Stability
• 50% ±1% Duty Cycle 1kHz to 2MHz
• 50% ±5% Duty Cycle 2MHz to 20MHz
• 1mA Typical Supply Current
• 100 Ohm CMOS Output Driver
• Operates from a Single 2.7V to 5.5V Supply
• Low Profile (1mm) SOT-23 (ThinSOT Package)

Typical Application

Description

The LTC1799 is a precision oscillator that is easy to use and occupies very little PC board space. The oscillator frequency is programmed by a single external resistor (R_SET). The LTC1799 has been designed for high accuracy operation (≤1.5% frequency error) without the need for external trim components.

The LTC1799 operates with a single 2.7V to 5.5V power supply and provides a rail-to-rail, 50% duty cycle square wave output. The CMOS output driver ensures fast rise/fall times and rail-to-rail switching. The frequency-setting resistor can vary from 3k to 1M to select a master oscillator frequency between 100kHz and 33MHz (5V supply). The three-state DIV input determines whether the master clock is divided by 1, 10 or 100 before driving the output, providing three frequency ranges spanning 1kHz to 33MHz (5V supply). The LTC1799 features a proprietary feedback loop that linearizes the relationship between R_SET and frequency, eliminating the need for tables to calculate frequency. The oscillator can be easily programmed using the simple formula outlined below:

Protected by U.S. Patents including 6342817 and 6614313.

 

Packaging

SOT-23

Order Info

• Part numbers ending in PBF are lead free. Please contact LTC marketing for information on lead based finish parts.
• Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
• Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number	Package	Pins	Temp	Price (1-99)	Price (1k)*	RoHS Data
LTC1799CS5	SOT	5	C	$2.65	$1.55	View
LTC1799CS5#PBF	SOT	5	C	$2.65		View
LTC1799CS5#TR	SOT	5	C	$2.65	$1.55	View
LTC1799CS5#TRM	SOT	5	C	$2.65	$1.57	View
LTC1799CS5#TRMPBF	SOT	5	C	$2.65	$1.57	View
LTC1799CS5#TRPBF	SOT	5	C	$2.65	$1.55	View
LTC1799HS5	SOT	5	H	$3.90	$1.93	View
LTC1799HS5#PBF	SOT	5	H	$3.90		View
LTC1799HS5#TR	SOT	5	H	$3.90	$1.99	View
LTC1799HS5#TRM	SOT	5	H	$3.90	$2.01	View
LTC1799HS5#TRMPBF	SOT	5	H	$3.90	$2.01	View
LTC1799HS5#TRPBF	SOT	5	H	$3.90	$1.99	View
LTC1799IS5	SOT	5	I	$3.57	$1.75	View
LTC1799IS5#PBF	SOT	5	I	$3.57	$1.75	View
LTC1799IS5#TR	SOT	5	I	$3.57	$1.81	View
LTC1799IS5#TRM	SOT	5	I	$3.57	$1.83	View
LTC1799IS5#TRMPBF	SOT	5	I	$3.57	$1.83	View
LTC1799IS5#TRPBF	SOT	5	I	$3.57	$1.81	View
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^* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Evaluation Kits

Part Number	Description	Price
DC814A-A	LTC6905 DEMO BOARD; BUFFER BOARD (DIP8 CLOCK BOARD NOT INCLUDED)	$50.00
DC814A-B	LTC1799 DEMO BOARD; BUFFER BOARD (DIP8 CLOCK BOARD NOT INCLUDED)	$50.00
DC814A-C	LTC6900 DEMO BOARD; BUFFER BOARD (DIP8 CLOCK BOARD NOT INCLUDED)	$50.00
DC814A-D	LTC6905-133 DEMO BOARD; BUFFER BOARD (DIP8 CLOCK BOARD NOT INCLUDED)	$50.00
DC814A-E	LTC6905-100 DEMO BOARD; BUFFER BOARD (DIP8 CLOCK BOARD NOT INCLUDED)	$50.00
DC814A-F	LTC6905-96 DEMO BOARD; BUFFER BOARD (DIP8 CLOCK BOARD NOT INCLUDED)	$50.00
DC814A-G	LTC6905-80 DEMO BOARD; BUFFER BOARD (DIP8 CLOCK BOARD NOT INCLUDED)	$50.00
DC814A-H	LTC6906 DEMO BOARD; BUFFER BOARD (DIP8 CLOCK BOARD NOT INCLUDED)	$50.00
DC814A-I	LTC6907 DEMO BOARD; BUFFER BOARD (DIP8 CLOCK BOARD NOT INCLUDED)	$50.00
DC814A-J	LTC6908-1 DEMO BOARD; BUFFER BOARD (DIP8 CLOCK BOARD NOT INCLUDED)	$50.00
DC814A-K	LTC6908-2 DEMO BOARD; BUFFER BOARD (DIP8 CLOCK BOARD NOT INCLUDED)	$50.00
DC814B-A	LTC6905 DIP8 CLOCK BOARD	$25.00
DC814B-B	LTC1799 DIP8 CLOCK BOARD	$25.00
DC814B-C	LTC6900 DIP8 CLOCK BOARD	$25.00
DC814B-D	LTC6905-133 DIP8 CLOCK BOARD	$25.00
DC814B-E	LTC6905-100 DIP8 CLOCK BOARD	$25.00
DC814B-F	LTC6905-96 DIP8 CLOCK BOARD	$25.00
DC814B-G	LTC6905-80 DIP8 CLOCK BOARD	$25.00
DC814C-H	LTC6906 DIP8 CLOCK BOARD	$25.00
DC814C-I	LTC6907 DIP8 CLOCK BOARD	$25.00
DC814D-J	LTC6908-1 DIP8 CLOCK BOARD	$25.00
DC814D-K	LTC6908-2 DIP8 CLOCK BOARD	$25.00
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Applications

• Low Cost Precision Oscillator
• Charge Pump Driver
• Switching Power Supply Clock Reference
• Clocking Switched Capacitor Filters
• Fixed Crystal Oscillator Replacement
• Ceramic Oscillator Replacement
• Small Footprint Replacement for Econ Oscillators

Simulate

OscCalc, an Excel based selection and synthesis tool, allows you to choose and configure the Silicon Oscillator best suited for your application.

• Download and open OscCalc
• Enable Macros
• Enter your desired switching frequency. Suitable silicon oscillators will be highlighted in green. Clicking on a part will show you the external component values and settings required to achieve your desired switching frequency.