Datasheet

LTC1799
11
1799fc
Typical applicaTion
Low Power 80Hz to 8kHz Sine Wave Generator (I
Q
< 4mA)
3V
R
SET
1
2
16
10
7
8
9
15
3
4
5
6
11
12
13
14
CLOCK A
ENABLE A
V
DD
ENABLE B
RESET A
V
SS
CLOCK B
RESET B
Q1A
Q2A
Q3A
Q4A
Q1B
Q2B
Q3B
Q4B
74HC4520
f
OSC
÷2
÷4
÷8
÷16
÷32
÷64
÷128
÷256
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
+
NC
V
+
SA
LPA
BPA
HPA/NA
INV A
CLK
AGND
V
–
SB
LPB
BPB
HPB/NB
INV B
LTC1067-50
3V
C2
0.1µF
C1
0.1µF
C3
0.1µF
C4
1µF
R61
10k
R51 5.11k
R31 51.1k
R21 20k
R
H1
249k
R
L1
51.1k
CLOCK-TUNABLE LOWPASS FILTER WITH
A STOPBAND NOTCH AT THE 3rd HARMONIC
3V
R62 14k
R52
5.11k
R32 51.1k
R22 20k
SINEWAVE
OUT
1799 TA05
R11
100k
V
+
GND
LTC1799
SET
OUT
1
2
3
5
3V
4
3V, N = 100
OPEN, N = 10
800Hz ≤ f
SINE
8kHz, N = 10
80Hz ≤ f
SINE
800Hz, N = 100
DIV
f
OSC
64
f
OSC
64
( )
• 3
f
SINE
= •
10MHz
N
10k
64R
SET
SW1