TS3005
BLOCK DIAGRAM
FDIV
I
CPWM
t
FOUT
(s)
FOUT (Hz)
2:0
(A)
000
1.7ms-56.88ms
586-17.578
1µ
001
13.65ms-455.16ms
73.25-2.197
1µ
010
109.17ms-3.64
9.16-0.2746
100n
011
877.19ms-29.15
1.14-0.0343
100n
100
7.01-233.1
0.143-0.00429
100n
101
55.94-31.09min
0.0178-0.536mHz
100n
110
7.49min-4.146hrs
0.0022-0.0670mHz
100n
111
59.67min-33.1hrs
0.279mHz-8.381µHz
100n
Table 1:
FOUT and PWMOUT Frequency Range per FDIV2:0 Combination
THEORY OF OPERATION
The TS3005 is a user-programmable oscillator where
the period of the square wave at its FOUT terminal is
generated by an external resistor connected to the
RSET pin. The output period is given by:
t
O T
R
SET
(MΩ)
t
FOUT
(s =
8
V2 0
x RS T x 512
1.08 11
Equation 1.
FOUT Frequency Calculation where
FDIV2:0 = 0 to 7
TS3005DS r1p0
0.360
59.67min
1
1.09hrs
2.49
6.87hrs
4.32
11.93hrs
6.81
18.81hrs
9.76
26.93hrs
12
33.1hrs
Table 2:
t
FOUT
vs R
SET
for FDIV2:0 = 111(7)
Page 7
RTFDS
TOUCHSTONE [ TOUCHSTONE SEMICONDUCTOR INC ]
