Rainbow-electronics MAX3798 Manual de usuario descargar pdf (Pagina 6)

MAX3798

1.0625Gbps to 10.32Gbps, Integrated, Low-

Power SFP+ Limiting Amplifier and VCSEL Driver

6 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

= 2.85V to 3.63V, T

= -40°C to +85°C, CML receiver output load is AC-coupled to differential 100Ω, C

= 1nF, transmitter out-

put load is AC-coupled to differential 100Ω (see Figure 1), typical values are at +25°C, V

= 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_

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

INIT

Time from power-on or negation of FAULT

using DISABLE

100 ms

FAULT Reset Time t_

FAULT

Time from fault to FAULT on,

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

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

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

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

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

, I

150 μA

MSEL Input High Voltage V

1.8 V

MSEL Input Low Voltage V

0 0.8 V

MSEL Input Impedance R

PULL

Internal pulldown resistor 40 75 110 k

DISABLE Input Current

Dependency on pullup resistance 420 800

μA

DISABLE Input High Voltage V

1.8 V

1 2 3 4 5 6 7 8 9 10 11 ... 34 35

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Rainbow-electronics MAX3798 Manual de usuario Pagina 6

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