LTC6991 Linear Technology, LTC6991 Datasheet - Page 10

• Manufacturer Part Number: LTC6991
• Description: Resettable Low Frequency Oscillator
• Manufacturer: Linear Technology

DataSheet.in
operaTion
LTC6991
Table 1. DIVCODE Programming
0
DIVCODE
10
11
12
13
14
15
0
1
2
3
4
5
6
7
8
9
POL
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
10000
0.001
1000
0.01
100
0.1
10
1
0V
0
2,097,152
2,097,152
262,144
262,144
32,768
32,768
4,096
4,096
1
N
512
512
64
64
DIV
1
8
8
1
Figure 2. Frequency Range and POL Bit vs DIVCODE
2
POL BIT = 0
3
4
2,147sec to 34,360sec
2,147sec to 34,360sec
1.024ms to 16.384ms
1.024ms to 16.384ms
RECOMMENDED t
268sec to 4,295sec
268sec to 4,295sec
8.192ms to 131ms
8.192ms to 131ms
65.5ms to 1.05sec
4.19sec to 67.1sec
4.19sec to 67.1sec
65.5ms to 1.05sec
33.6sec to 537sec
33.6sec to 537sec
524ms to 8.39sec
524ms to 8.39sec
5
6
INCREASING V
7
0.5•V
+
8
OUT
DIV
9
10
POL BIT = 0
R1 (kΩ)
11
Short
Open
1000
1000
1000
1000
1000
976
976
887
681
523
392
280
182
102
12
13
14
6991 F02
15
R2 (kΩ)
Short
V
Open
1000
1000
1000
1000
1000
102
182
280
392
523
681
887
976
976
+
≤0.03125 ±0.015
≥0.96875 ±0.015
0.09375 ±0.015
0.15625 ±0.015
0.21875 ±0.015
0.28125 ±0.015
0.34375 ±0.015
0.40625 ±0.015
0.46875 ±0.015
0.53125 ±0.015
0.59375 ±0.015
0.65625 ±0.015
0.71875 ±0.015
0.78125 ±0.015
0.84375 ±0.015
0.90625 ±0.015
V
DIV
/V
+
6991p