LTC6990IDCB-TRPB 데이터 시트보기 (PDF) - Analog Devices
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LTC6990IDCB-TRPB Datasheet PDF : 30 Pages
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LTC6990
TYPICAL APPLICATIONS
Programming NDIV Using an 8-Bit DAC
OE
OUT
LTC6990
GND
V+
SET
DIV
RSET
619k
2.25V TO 5.5V
C1
0.1µF
C2
0.1µF
VCC
SDI
VOUT LTC2630-LZ8 SCK
CS/LD
GND
µP
6990 TA02
DIVCODE
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
DAC CODE
0
24
40
56
72
88
104
120
136
152
168
184
200
216
232
255
Full Range VCO with Any NDIV Setting (fMAX to fMIN for VIN = 0V to VSET)
VIN
0V TO 1V
RVCO1
26.1k
RVCO2
26.1k
5V
–
LT1490
+
5V
D1
IN4148
OE
OUT
LTC6990
GND
V+
SET
DIV
6990 TA03
C1
0.1µF
5V
R1
R2
RSET
826k
22
Full Range VCO with Any NDIV Setting (Positive Frequency Control, fMIN to fMAX for VIN = 0V to VSET
R3
VIN
10k
0V TO 1V
R4
10k
5V
–
LT1490
+
5V
RVCO
53.6k
OE
OUT
LTC6990
GND
V+
SET
RSET1
412k
DIV
6990 TA04
RSET2
412k
C1
0.1µF
5V
R1
R2
For more information www.analog.com
Rev. D
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