Rainbow Electronics DS1862 - Manual (Page 5)

DS1862
XFP Laser Control and Digital Diagnostic IC
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AC ELECTRICAL CHARACTERISICS—XFP CONTROLLER
(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
Time to Initialize t INIT V CC3 within ±5% of nominal 30 200 ms
TX-D Assert Time t
OFF
IBIAS and IMOD below 10% of nominal 5 µs
TX-D Deassert Time t ON IBIAS and IMOD above 90% of nominal 1 ms
P-DOWN/RST Assert Time t PDR-ON IBIAS and IMOD below 10% of nominal 100 µs
P-DOWN/RST Deassert Time t PDR-OFF IBIAS and IMOD above 90% of nominal 200 ms
MOD-DESEL Deassert Time t MOD-DESEL
Time until proper response to I 2 C
communication
2 ms
INTERRUPT Assert Delay t INT-ON Time from fault to interrupt assertion 100 ms
INTERRUPT Deassert Delay t INT-OFF
Time from read (clear flags) to interrupt
deassertion
500 µs
MOD-NR Assert Delay t MOD-NR-ON Time from fault to MOD-NR assertion 0.5 ms
MOD-NR Deassert Delay t MOD-NR-OFF
Time from read (clear flags) to MOD-NR
deassertion
0.5 ms
RX-LOS Assert Time t LOS-ON
Time from SC-RX-LOS assertion to
RX-LOS assertion
100 ns
RX-LOS Deassert Time t LOS-OFF
Time from SC-RX-LOS deassertion to
RX-LOS deassertion
100 ns
P-DOWN/RST Reset Time t RESET
Time from P-DOWN/RST assertion to
initial reset
10 µs
Shutdown Time t FAULT
Time from fault to I BIASSET , I MODSET ,
and I BMD below 10%
30 µs
ANALOG OUTPUT CHARACTERISTICS (continued)
(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
I MODSET Accuracy
+25°C
I
MODSET = 0.04mA to 1.2mA
-1.5 +1.5 %
75µA range -0.9 +0.9
150µA range -0.9 +0.9
300µA range -0.9 +0.9
600µA range -0.9 +0.9
I MODSET DNL
1200µA range -0.9 +0.9
LSB
75µA range -1.5 +1.5
150µA range -1.5 +1.5
300µA range -1.0 +1.0
600µA range -1.0 +1.0
I MODSET INL
1200µA range -1.0 +1.0
LSB
I MODSET Temp Drift 5 %
I MODSET Voltage Drift 1.2 %/V
I MODSET FS Accuracy 1.5 %
APC Bandwidth I MD / I APC = 1 (Note 4) 6 10 30 kHz