LTC6991 Ver la hoja de datos (PDF) - Linear Technology
Número de pieza
componentes Descripción
fabricante
LTC6991 Datasheet PDF : 24 Pages
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LTC6991
Operation
Table 1. DIVCODE Programming
DIVCODE
POL
0
0
1
0
2
0
3
0
4
0
5
0
6
0
7
0
8
1
9
1
10
1
11
1
12
1
13
1
14
1
15
1
NDIV
1
8
64
512
4,096
32,768
262,144
2,097,152
2,097,152
262,144
32,768
4,096
512
64
8
1
RECOMMENDED tOUT
1.024ms to 16.384ms
8.192ms to 131ms
65.5ms to 1.05sec
524ms to 8.39sec
4.19sec to 67.1sec
33.6sec to 537sec
268sec to 4,295sec
2,147sec to 34,360sec
2,147sec to 34,360sec
268sec to 4,295sec
33.6sec to 537sec
4.19sec to 67.1sec
524ms to 8.39sec
65.5ms to 1.05sec
8.192ms to 131ms
1.024ms to 16.384ms
R1 (kΩ)
Open
976
976
1000
1000
1000
1000
1000
887
681
523
392
280
182
102
Short
R2 (kΩ)
Short
102
182
280
392
523
681
887
1000
1000
1000
1000
1000
976
976
Open
VDIV/V+
≤0.03125 ±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
≥0.96875 ±0.015
10000
1000
100
10
1
0.1
0.01
0
0.001
0V
POL BIT = 0
78
POL BIT = 1
6
9
5
10
4
11
3
12
2
13
1
14
0.5• V+
INCREASING VDIV
Figure 2. Frequency Range and POL Bit vs DIVCODE
15
V+
6991 F02
6991f
10
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