LTC6906 Datasheet, PDF (1/12 Pages) Linear Technology – Micropower, 10kHz to 1MHz Resistor Set Oscillator in SOT-23

FEATURES
■ _{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}^TM_{) Package}
U
APPLICATIO S
■ _{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}
, 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.
LTC6906
Micropower, 10kHz to 1MHz
Resistor Set Oscillator
in SOT-23
DESCRIPTIO
The LTC^®6906 is a precision programmable oscillator that
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:
⎧10, DIV Pin = V ⁺
ƒ_OUT
=
1MHz
N
•
⎛
⎝⎜
100k
R_SET
⎞
⎠⎟
,
N
=
⎨⎪^3,
⎩⎪^1,
DIV Pin = Open
DIV Pin = GND
No decoupling capacitor is needed in most cases, yielding
an extremely compact solution occupying less than 20mm².
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.
TYPICAL APPLICATIO
Micropower Clock Generator
NO DECOUPLING
CAPACITOR
NEEDED
LTC6906 ^{10kHz TO 1MHz}
2.25V TO 3.6V
V⁺ OUT
÷10
GND GRD
÷3
DIV SET
÷1
R_SET
100k TO 1M
6906 TA01
Typical Supply Current vs Frequency
90
C_L = 5pF
80 TA = 25°C
70
60
V⁺ = 3.6V
50
V⁺ = 2.25V
40
30
20
10
0
0 200 400 600 800 1000 1200
FREQUENCY (kHz)
6906 G04
6906fa
1