
6
Maxim Integrated
SFP Controller for Dual Rx Interface
DS1877
DAC1, DAC2 ELECTRICAL CHARACTERISTICS
(VCC = +2.85V to +3.9V, TA = -40NC to +95NC, unless otherwise noted.)
ANALOG VOLTAGE MONITORING CHARACTERISTICS
(VCC = +2.85V to +3.9V, TA = -40NC to +95NC, unless otherwise noted.)
AC ELECTRICAL CHARACTERISTICS
(VCC = +2.85V to +3.9V, TA = -40NC to +95NC, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Main Oscillator Frequency
fOSC
5
MHz
Delta-Sigma Input-Clock
Frequency
fDS
fOSC/2
MHz
Reference Voltage Input (REFIN)
VREFIN
Minimum 0.1FF to GND
2
VCC
V
Output Range
0
VREFIN
V
Output Resolution
See the Delta-Sigma Outputs section for
details
10
Bits
Output Impedance
RDS
35
100
I
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
ADC Resolution
13
Bits
Input/Supply Accuracy
(RSSI1_, RSSI2_, VCC)
ACC
At factory setting
0.25
0.5
%FS
Update Rate for Temperature,
RSSI1_, RSSI2_, VCC
tRR
45
75
ms
Input/Supply Offset
(RSSI1_, RSSI2_, VCC)
VOS
(Note 3)
0
5
LSB
Factory Setting (Note 4)
RSSI1/RSSI2 coarse
2.5
V
VCC
6.5536
RSSI1/RSSI2 fine
312.5
F
V
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Fault Reset Time (to FAULT = 0)
tINITR
From h VCC > VCC LO alarm (Note 5)
161
ms
LOSOUT Assert Time
tLOSS_ON LOS_ LO (Note 6)
25.6
F
s
LOSOUT Deassert Time
tLOSS_OFF LOS_ HI (Note 7)
25.6
F
s