Rainbow Electronics MAX3798 - Manual (Page 6)

MAX3798
1.0625Gbps to 10.32Gbps, Integrated, Low-
Power SFP+ Limiting Amplifier and VCSEL Driver
6 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V CC = 2.85V to 3.63V, T A = -40°C to +85°C, CML receiver output load is AC-coupled to differential 100 Ω, C
AZ = 1nF, transmitter out-
put load is AC-coupled to differential 100 Ω (see Figure 1), typical values are at +25°C, V
CC = 3.3V, I BIAS = 6mA, I MOD = 6mA, unless
otherwise specified. Registers are set to default values unless otherwise noted, and the 3-wire interface is static during measure-
ments. For testing, the MODE_SEL bit was used and the MSEL pin was left open.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
DISABLE Negate Time t_ ON
Time from falling edge of DISABLE to I BIAS
and I MOD at 90% of steady state when
FAULT = 0 before reset
500 μs
FAULT Reset Time of Power-On
Time
t_ INIT
Time from power-on or negation of FAULT
using DISABLE
100 ms
FAULT Reset Time t_ FAULT
Time from fault to FAULT on,
C
FAULT
20pF, R
FAULT = 4.7k
10 μs
DISABLE to Reset
Time DISABLE must be held high to reset
FAULT
5 μs
OUTPUT LEVEL VOLTAGE DAC (SET_CML)
Full-Scale Voltage V FS 100 differential resistive load 1200 mV P-P
Resolution 5 mV P-P
Integral Nonlinearity INL 5mA I CML_LEVEL 20mA ±0.9 LSB
LOS THRESHOLD VOLTAGE DAC (SET_LOS)
Full-Scale Voltage V FS 94 mV P-P
Resolution 1.5 mV P-P
Integral Nonlinearity INL 11mV P-P
V
TH_LOS
94mV
P-P ±0.7 LSB
BIAS CURRENT DAC (SET_IBIAS)
Full-Scale Current I FS 21 mA
Resolution 40 μA
Integral Nonlinearity INL 1mA I BIAS 15mA ±1 LSB
Differential Nonlinearity DNL
1mA I BIAS 15mA, guaranteed mono-
tonic at 8-bit resolution (SET_IBIAS[8:1])
±1 LSB
MODULATION CURRENT DAC (SET_IMOD)
Full-Scale Current I FS 21 mA
Resolution 40 μA
Integral Nonlinearity INL 2mA I
MOD
12mA ±1 LSB
Differential Nonlinearity DNL
2mA I
MOD
12mA, guaranteed mono-
tonic at 8-bit resolution (SET_IMOD[8:1])
±1 LSB
CONTROL I/O SPECIFICATIONS
MSEL Input Current I IH , I IL 150 μA
MSEL Input High Voltage V
IH
1.8 V
CC
V
MSEL Input Low Voltage V IL 0 0.8 V
MSEL Input Impedance R PULL Internal pulldown resistor 40 75 110 k
I IH 12
DISABLE Input Current
I IL Dependency on pullup resistance 420 800
μA
DISABLE Input High Voltage V IH 1.8 V CC V