Rainbow Electronics DS1862 - Manual (Page 6)

DS1862
XFP Laser Control and Digital Diagnostic IC
6 _____________________________________________________________________
AC ELECTRICAL CHARACTERISICS—SOFT* CONTROL AND STATUS
(V CC3 = +2.9V to +5.5V, V CC2 = +1.6V to +3.6V, T A = -40°C to +100°C, unless otherwise noted.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Soft TX-D Assert Time t OFF_Soft IBIAS and IMOD below 10% of nominal 50 ms
Soft TX-D Deassert Time t ON_Soft IBIAS and IMOD above 90% of nominal 50 ms
Soft P-DOWN/RST Assert Time t
PDR-ON_Soft
IBIAS and IMOD below 10% of nominal 50 ms
Soft P-DOWN/RST Deassert Time t PDR-OFF_Soft IBIAS and IMOD above 90% of nominal 200 ms
Soft MOD-NR Assert Delay
t
MOD-NR-ON
_Soft
Time from fault to MOD-NR assertion 50 ms
Soft MOD-NR Deassert Delay
t MOD-NR-OFF
_Soft
Time from read (clear flags) to MOD-NR
deassertion
50 ms
Soft RX_LOS Assert Time t LOS-ON_Soft
Time from SC-RX-LOS assertion to
RX-LOS assertion
50 ms
Soft RX_LOS Deassert Time t LOS-OFF_Soft
Time from SC-RX-LOS deassertion to
RX-LOS deassertion
50 ms
Analog Parameter data Ready
(DATA-NR)
500 ms
*All SOFT timing specifications are measured from the falling edge of “STOP” signal during I 2 C communication.
ANALOG INPUT CHARACTERISTICS
(V CC3 = +2.9V to +5.5V, T A = -40°C to +100°C, unless otherwise noted.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
I BMD Configurable Source or
Sink (+/-)
0.05 1.50 mA
Source mode 2.0
I BMD Voltage (I BMD - 0µA) V BMD
Sink mode
I BMD range 0 to 1.5mA
1.2
V
I BMD Input Resistance R BMD 400 550 700 Ω
A/D INPUT VOLTAGE MONITORING (IBIASMON, AUX2MON, AUX1MON, RSSI, BMD)
(V CC3 = +2.9V to +5.5V, T A = -40°C to +100°C, unless otherwise noted.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Input Resolution ∆V
MON 610 µV
Supply Resolution ∆V
CC2/3 1.6 mV
Input/Supply Accuracy A
CC
At factory setting 0.25 0.5 %FS
t FRAME1 AUX1MON and AUX2MON disabled 48 52
Update Rate
t FRAME2 All channels enabled 64 75
ms
Input/Supply Offset V OS (Note 4) 0 5 LSB
Full-Scale Input (I BIASMON and
RSSI)
At factory setting 2.4875 2.5 2.5125 V
Full-Scale Input (AUX1MON,
AUX2MON, and V
CC2/3 )
At factory setting
(Note 9)
6.5208 6.5536 6.5864 V
BMD (Monitor) (TX-P) FS setting 1.5 mA