LTC1799IS5#TRMPBF Linear Technology, LTC1799IS5#TRMPBF Datasheet

IC OSCILLATOR RES SET TSOT23-5

LTC1799IS5#TRMPBF

Manufacturer Part Number
LTC1799IS5#TRMPBF
Description
IC OSCILLATOR RES SET TSOT23-5
Manufacturer
Linear Technology
Type
Oscillator, Siliconr
Datasheet

Specifications of LTC1799IS5#TRMPBF

Frequency
33MHz
Voltage - Supply
2.7 V ~ 5.5 V
Current - Supply
7mA
Operating Temperature
-40°C ~ 85°C
Package / Case
TSOT-23-5, TSOT-5, TSOP-5
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Count
-
Other names
LTC1799IS5#TRMPBFTR

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LTC1799IS5#TRMPBFLTC1799IS5
Manufacturer:
LT
Quantity:
5 321
Company:
Part Number:
LTC1799IS5#TRMPBFLTC1799IS5#PBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Company:
Part Number:
LTC1799IS5#TRMPBF
Manufacturer:
LT
Quantity:
2 012
Company:
Part Number:
LTC1799IS5#TRMPBF
Manufacturer:
LT/凌特
Quantity:
20 000
Company:
Part Number:
LTC1799IS5#TRMPBFLTC1799IS5#TRPBF
Manufacturer:
LT
Quantity:
20 000
FeaTures
applicaTions
Typical applicaTion
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property
of their respective owners. Protected by U.S. Patents including 6342817 and 6614313.
One External Resistor Sets the Frequency
Fast Start-Up Time: <1ms
1kHz to 33MHz Frequency Range
Frequency Error ≤1.5% 5kHz to 20MHz
(T
Frequency Error ≤2% 5kHz to 20MHz
(T
±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
100Ω CMOS Output Driver
Operates from a Single 2.7V to 5.5V Supply
Low Profile (1mm) SOT-23 (ThinSOT™ Package)
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
3k ≤ R
A
A
= 25°C)
= 0°C to 70°C)
SET
≤ 1M
5V
0.1µF
TSOT-23 Actual Size
Basic Connection
1
2
3
V
GND
SET
LTC1799
+
1799 TA01
OUT
DIV
5
4
1kHz ≤ f
÷100
÷1
OSC
5V
÷10
≤ 33MHz
OPEN
Resistor Set SOT-23 Oscillator
DescripTion
The LTC
and occupies very little PC board space. The oscillator
frequency is programmed by a single external resistor
(R
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 oscil-
lator 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 out-
put, providing three frequency ranges spanning 1kHz to
33MHz (5V supply). The LTC1799 features a proprietary
feedback loop that linearizes the relationship between R
and frequency, eliminating the need for tables to calculate
frequency. The oscillator can be easily programmed using
the simple formula outlined below:
f
OSC
SET
= 10MHz •
). The LTC1799 has been designed for high accuracy
®
1799 is a precision oscillator that is easy to use
T
25
20
15
10
Typical Distribution of Frequency Error,
A
–1.25
5
0
= 25°C (5kHz ≤ f
 
–0.75
N • R
10k
FREQUENCY ERROR (%)
SET
–0.25 0 0.25
1kHz to 33MHz
 
OSC
, N =
≤ 20MHz, V
100,
10,
1,
0.75
LTC1799
1799 TA02
DIV Pin = V
DIV Pin = Open
DIV Pin = GND
+
= 5V)
1.25
+
1799fc
1
SET

Related parts for LTC1799IS5#TRMPBF

LTC1799IS5#TRMPBF Summary of contents

Page 1

... Small Footprint Replacement for Econ Oscillators n L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents including 6342817 and 6614313. Typical applicaTion ...

Page 2

LTC1799 absoluTe MaxiMuM raTings (Note 1) + Supply Voltage ( GND ......................... –0. DIV to GND .....................................–0. SET to GND .....................................–0. Operating Temperature Range LTC1799C ................................................ 0°C to 70°C LTC1799I .............................................–40°C to ...

Page 3

T voltages are with respect to GND. SYMBOL PARAMETER Duty Cycle (Note Operating Supply Range I Power Supply Current S V High Level DIV Input Voltage IH V Low ...

Page 4

LTC1799 Typical perForMance characTerisTics Frequency Variation vs R SET 25°C A GUARANTEED LIMITS APPLY 3 OVER 5k TO 200k RANGE –1 –2 –3 – SET Peak-to-Peak Jitter vs Frequency 0.7 0.6 ...

Page 5

FuncTions + V (Pin 1): Voltage Supply (2.7V ≤ V ply must be kept free from noise and ripple. It should be bypassed directly to a ground plane with a 0.1µF capacitor. GND (Pin 2): Ground. Should be tied ...

Page 6

LTC1799 Theory oF operaTion As shown in the Block Diagram, the LTC1799’s master oscillator is controlled by the ratio of the voltage between + the V and SET pins and the current entering the SET pin (I ). The voltage ...

Page 7

SELECTING THE DIVIDER SETTING AND RESISTOR The LTC1799’s master oscillator has a frequency range spanning 0.1MHz to 33MHz. However, accuracy may suffer if the master oscillator is operated at greater than 10MHz with a supply voltage lower than ...

Page 8

LTC1799 applicaTions inForMaTion POwER SUPPLY REJECTION Low Frequency Supply Rejection (Voltage Coefficient) Figure 5 shows the output frequency sensitivity to power supply voltage at several different temperatures. The LTC1799 has a conservative guaranteed voltage coeffi- cient of 0.1%/V but, as ...

Page 9

Jitter The typical jitter is listed in the Electrical Characteristics and shown in the Typical Performance Characteristics. These specifications assume that the capacitance on SET (Pin 3) is limited to less than 10pF , as suggested in the ...

Page 10

LTC1799 applicaTions inForMaTion Once known, calculate R IN SET 10MHz 10k R = • • SET N f OSC(MAX   −    IN(MAX) RES R ...

Page 11

Typical applicaTion Low Power 80Hz to 8kHz Sine wave Generator ( OSC OUT 3V LTC1799 SET 3V 100 0.1µF GND SW1 OPEN SET DIV ...

Page 12

LTC1799 package DescripTion 0.62 MAX 3.85 MAX 2.62 REF RECOMMENDED SOLDER PAD LAYOUT PER IPC CALCULATOR 0.20 BSC DATUM ‘A’ 0.30 – 0.50 REF NOTE: 1. DIMENSIONS ARE IN MILLIMETERS 2. DRAWING NOT TO SCALE 3. DIMENSIONS ARE INCLUSIVE OF ...

Page 13

... Revised part number in Maximum VCO Modulation Bandwidth section. Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...

Page 14

... OSC 800 600 4 400 1799 TA03 200 www.linear.com ● 5 OUT OUT 4 DIV 1799 TA08 Output Frequency vs Temperature MAX TYP MIN 0 –20 – TEMPERATURE (°C) 1799 TA04 LT 0111 REV C • PRINTED IN USA  LINEAR TECHNOLOGY CORPORA TION 2001 1799fc ...

Related keywords