LTC6907 Datasheet, PDF (1/12 Pages) Linear Technology – Micropower, 40kHz to 4MHz Resistor Set Oscillator in SOT-23

FEATURES
■ _{Supply Current: 36µA at 400kHz}
■ _{1% Frequency Accuracy (from 0°C to 70°C)}
■ _{Frequency Range: 40kHz to 4MHz}
■ _{One Resistor Sets the Oscillator Frequency}
■ _{–40°C to 125°C Operating Temperature Range}
■ _{Start-Up Time Under 200µs at 4MHz}
■ _{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}
, LT, LTC and LTM 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.
LTC6907
Micropower, 40kHz to 4MHz
Resistor Set Oscillator
in SOT-23
DESCRIPTIO
The LTC^®6907 is a precision programmable oscillator that
is versatile, compact and easy to use. Micropower opera-
tion benefits portable and battery-powered equipment. At
400kHz, the LTC6907 consumes 36µA on a 3V supply.
A single resistor programs the oscillator frequency over a
10:1 range with better than 0.65% initial accuracy. The
output frequency can be divided by 1, 3 or 10 to span a
100:1 total frequency range, 40kHz to 4MHz.
The LTC6907 is easily programmed according to this
simple formula:
⎧10, DIV Pin = V ⁺
ƒ_OUT
=
4MHz
N
•
⎛
⎝⎜
50k
R_SET
⎞
⎠⎟
,
N = _⎨⎪3,
⎩⎪^1,
DIV Pin = Open
DIV Pin = GND
The LTC6907 is available in the 6-lead SOT-23 (ThinSOT)
package.
Contact LTC Marketing for a version of the part with a
shutdown feature or lower frequency operation.
TYPICAL APPLICATIO
Micropower Clock Generator
3V TO 3.6V
0.1µF
÷10
÷3
÷1
LTC6907 40kHz TO 4MHz
V⁺ OUT
GND GRD
DIV SET
R_SET
50k TO 500k
6907 TA01
Typical Supply Current vs Frequency
1000
C_LOAD = 5pF
T = 25°C
3.3V, –: 1
3.3V, –: 3
3.3V, –: 10
100
10
10
100
1000
OUTPUT FREQUENCY (kHz)
10000
6907 TA02
6907fa
1