Ds1875, Pon triplexer and sfp controller, Typical operating characteristics (continued) – Rainbow Electronics DS1875 User Manual
Page 11
DS1875
Typical Operating Characteristics (continued)
(V
CC
= +2.85V to +3.9V, T
A
= +25°C, unless otherwise noted.)
CALCULATED AND DESIRED % CHANGE
IN V
MOD
vs. MOD RANGING
DS1875 toc10
MOD RANGING VALUE (DEC)
CHANGE IN V
MOD
(%)
007
006
004 005
002 003
001
10
20
30
40
50
60
70
80
90
100
0
000
CALCULATED
VALUE
DESIRED
VALUE
DESIRED AND CALCULATED CHANGE
IN V
BMD
vs. COMP RANGING
DS1875 toc11
COMP RANGING (DEC)
CHANGE IN V
BMD
(%)
111
110
100 101
010 011
001
10
20
30
40
50
60
70
80
90
100
0
000
CALCULATED
VALUE
DESIRED
VALUE
MON1 TO MON8 INL
DS1875 toc12
MON1 TO MON8 INPUT VOLTAGE (V)
MON1 TO MON8 INL (LSB)
2.0
1.5
1.0
0.5
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1.0
-1.0
0
2.5
USING FACTORY-PROGRAMMED
FULL-SCALE VALUE OF 2.5V
MON1 TO MON8 DNL
DS1875 toc13
MON1 TO MON8 INPUT VOLTAGE (V)
MON1 TO MON8 DNL (LSB)
2.0
1.5
1.0
0.5
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1.0
-1.0
0
2.5
USING FACTORY-PROGRAMMED
FULL-SCALE VALUE OF 2.5V
V
BMD
INL vs. APC INDEX
DS1875 toc14
APC INDEX (DEC)
V
BMD
INL (LSB)
250
200
150
100
50
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1.0
-1.0
0
V
MOD
INL vs. MOD INDEX
DS1875 toc15
MOD INDEX (DEC)
V
MOD
INL (LSB)
250
200
150
100
50
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1.0
-1.0
0
FB VOLTAGE vs. TEMPERATURE
PWM DAC = FFh
DS1875 toc16
TEMPERATURE (
°C)
V
OUT
(V)
80
60
40
20
0
-20
1.245
1.250
1.255
1.260
1.240
-40
V
OUT
vs. V
CC
V
IN
= 3.3V
DS1875 toc17
V
CC
(V)
V
OUT
(V)
3.85
3.35
75.2
75.4
75.6
75.8
76.0
76.2
76.4
76.6
76.8
77.0
75.0
2.85
DUTY-CYCLE LIMIT vs. TEMPERATURE
DS1875 toc18
TEMPERATURE (
°C)
V
OUT
(V)
80
60
-20
0
20
40
89.25
89.50
89.75
90.00
90.25
90.50
90.75
91.00
89.00
-40
SW FREQUENCY
525kHz
262.5kHz
131.25kHZ
1050kHz
PON Triplexer and SFP Controller
______________________________________________________________________________________
11