TS3002 TOUCHSTONE [Touchstone Semiconductor Inc], TS3002 Datasheet - Page 8

• Manufacturer Part Number: TS3002
• Description: A 1V/1uA Easy-to-Use Silicon Oscillator/Timer
• Manufacturer: TOUCHSTONE [Touchstone Semiconductor Inc]

TS3002
BLOCK DIAGRAM
THEORY OF OPERATION
The TS3002 is a user-programmable oscillator where
the period of the square wave at its FOUT terminal is
generated by an external resistor and capacitor pair.
The output frequency is given by:
Page 8
FOUT (kHz) =
Table 1: FOUT vs R
R
SET
t
FOUT
2.49
4.32
6.81
9.76
1
(MΩ)
1
( s)
SET
FOUT (kHz)
k R
, C
106
43
25
16
11
SET
SET
= 7.9pF
MΩ x C
1E
SET
(pF)
where the scalar k is approximately 1.19. With an
R
frequency is approximately 25kHz with a 50% duty
cycle. As design aids, Tables 1 lists TS3002’s typical
FOUT for various standard values for R
= 7.9pF and Table 2 lists typical FOUT for various
standard values for C
The TS3002 also provides a separate PWM output
signal at its PWMOUT terminal that is anti-phase with
respect to FOUT. In addition, applying a voltage at
SET
= 4.32MΩ and a C
Table 2: FOUT vs C
C
SET
7.9
10
15
20
5
(pF)
SET
with R
SET
FOUT (kHz)
SET
, R
SET
39
25
19
13
10
= 7.9pF, the output
SET
= 4.32MΩ.
= 4.32MΩ
TS3002DS r1p0
SET
with C
RTFDS
SET