ltc6906cs6-trpbf Linear Technology Corporation, ltc6906cs6-trpbf Datasheet

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ltc6906cs6-trpbf

Manufacturer Part Number
ltc6906cs6-trpbf
Description
Micropower, 10khz To 1mhz Resistor Set Oscillator In Sot-23
Manufacturer
Linear Technology Corporation
Datasheet
APPLICATIO S
FEATURES
ThinSOT is a trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATIO
, LTC and LT are registered trademarks of Linear Technology Corporation.
Supply Current: 12µA at 100kHz
<0.65% Frequency Accuracy (from 0°C to 70°C)
Frequency Range: 10kHz to 1MHz
One Resistor Sets the Oscillator Frequency
Single Supply: 2.25V to 5.5V
–40°C to 125°C Operating Temperature Range
No Decoupling Capacitor Needed
Start-Up Time Under 200µs at 1MHz
First Cycle After Power-Up is Accurate
150Ω CMOS Output Driver
Low Profile (1mm) SOT-23 (ThinSOT
Low Cost Precision Programmable Oscillator
Rugged, Compact Micropower Replacement for
Crystal and Ceramic Oscillators
High Shock and Vibration Environments
Portable and Battery-Powered Equipment
PDAs and Cellular Phones
2.25V TO 3.6V
Micropower Clock Generator
÷10
÷3
÷1
NO DECOUPLING
U
CAPACITOR
NEEDED
V
GND
DIV
+
LTC6906
GRD
OUT
SET
U
10kHz TO 1MHz
TM
R
100k TO 1M
6906 TA01
SET
) Package
Micropower, 10kHz to 1MHz
DESCRIPTIO
The LTC
is versatile, compact and easy-to-use. Micropower opera-
tion benefits portable and battery-powered equipment. At
100kHz, the LTC6906 consumes 12µA on a 3.3V supply.
A single resistor programs the oscillator frequency over a
10:1 range with better than 0.5% initial accuracy. The
output frequency can be divided by 1, 3 or 10 to span a
100:1 total frequency range, 10kHz to 1MHz.
The LTC6906 is easily programmed according to this
simple formula:
No decoupling capacitor is needed in most cases, yielding
an extremely compact solution occupying less than 20mm
Contact LTC Marketing for a version of the part with a
shutdown feature or lower frequency operation.
The LTC6906 is available in the 6-lead SOT-23 (ThinSOT)
package.
ƒ
OUT
®
=
6906 is a precision programmable oscillator that
90
80
70
60
50
40
20
30
10
1
0
Resistor Set Oscillator
MHz
Typical Supply Current vs Frequency
0
N
C
T
A
L
= 5pF
= 25°C
200
U
R
100
SET
400
FREQUENCY (kHz)
k
V
+
= 3.6V
,
600
N
=
V
+
800
= 2.25V
10
3
1
,
,
1000
,
in SOT-23
DIV Pin V
DIV Pin
DIV Pin GND
6906 G04
LTC6906
1200
=
=
=
Open
+
6906fa
1
2
.

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ltc6906cs6-trpbf Summary of contents

Page 1

... High Shock and Vibration Environments ■ Portable and Battery-Powered Equipment ■ PDAs and Cellular Phones , LTC and LT are registered trademarks of Linear Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. U TYPICAL APPLICATIO Micropower Clock Generator ...

Page 2

... ORDER PART NUMBER LTC6906CS6 LTC6906IS6 LTC6906HS6 Order Options Tape and Reel: Add #TR Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF Lead Free Part Marking: Consult LTC Marketing for parts specified with wider operating temperature range. ...

Page 3

ELECTRICAL CHARACTERISTICS temperature range, otherwise specifications are at T All voltages are with respect to GND. SYMBOL PARAMETER V High Level DIV Input Voltage IH V Low Level DIV Input Voltage IL I DIV Input Current (Note 5) DIV V ...

Page 4

LTC6906 W U TYPICAL PERFOR A CE CHARACTERISTICS Typical Frequency Error vs Power Supply 0.50 0.40 0.30 0.20 0. SET 100k SET –0.10 –0.20 –0.30 –0.40 –0. SUPPLY VOLTAGE (V) ...

Page 5

CTIO S OUT (Pin 1): Oscillator Output. The OUT pin swings from + GND to V with an output resistance of approximately 150Ω. For micropower operation, the load resistance must be kept as high as ...

Page 6

LTC6906 TEST CIRCUIT VOLTAGE EQUIVALE T I PUT A D OUTPUT CIRCUITS + V 6 20Ω 800pF GND 2 6906 F02 + Figure 2. V Pin + V 6 DIV 3 GND 2 Figure 5. DIV Pin ...

Page 7

THEORY OF OPERATIO The LTC6906 is a precision, resistor programmable oscil- lator (see Block Diagram). It generates a square wave at the OUT pin with a period directly proportional to the value of an external resistor feedback ...

Page 8

LTC6906 U U APPLICATIO S I FOR ATIO Selecting R and the Divider Ratio SET The LTC6906 contains a master oscillator followed by a digital divider (see Block Diagram). R master oscillator frequency and the DIV pin sets the divider ...

Page 9

U U APPLICATIO S I FOR ATIO 2. ÷1 50 ÷ 200 400 600 800 MASTER OSCILLATOR FREQUENCY (kHz) Figure 9. Supply Current vs Frequency Achieving the highest ...

Page 10

LTC6906 U U APPLICATIO S I FOR ATIO L S LTC6906 330nH + 3.3V V OUT GND GRD DIV SET Figure 12. Test Circuit with an Inductive Power Supply 3 5pF LOAD C = 10pF ...

Page 11

... V to temperature is shown in the Typical SET 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 represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights Performance graphs. V ° ...

Page 12

... Sine Wave Oscillator 1MHz 0.1µF LTC6906 1k + 2.25V TO 3.6V OUT V GND GRD L1 DIV SET 100µH R SET 100k 2.90 BSC (NOTE 4) PIN ONE ID 0.30 – 0.45 6 PLCS (NOTE 3) 0.01 – 0.10 1.90 BSC S6 TSOT-23 0302 LT/LWI/LT 0705 REV A • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2005 C1 240pF 6906 TA05 6906fa ...

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