MAX3798 Ver la hoja de datos (PDF) - Maxim Integrated

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Fabricante

MAX3798

1.0625Gbps to 10.32Gbps, Integrated, Low-Power SFP+ Limiting Amplifier and VCSEL Driver

Maxim Integrated 

1.0625Gbps to 10.32Gbps, Integrated, Low-

Power SFP+ Limiting Amplifier and VCSEL Driver

Note 5: Receiver deterministic jitter is measured with a repeating 231 - 1 PRBS equivalent pattern at 10.32Gbps. For 1.0625Gbps to

8.5Gbps, a repeating K28.5 pattern [00111110101100000101] is used. Deterministic jitter is defined as the arithmetic sum

of pulse-width distortion (PWD) and pattern-dependent jitter (PDJ).

Note 6: Measured with a k28.5 pattern from 1.0625Gbps to 8.5Gbps. Measured with 231 - 1 PRBS at 10.32Gbps.

Note 7: Measurement includes an input AC-coupling capacitor of 100nF and CCAZ of 100nF. The signal at the input is switched

between two amplitudes: Signal_ON and Signal_OFF.

1) Receiver operates at sensitivity level plus 1dB power penalty.

a) Signal_OFF = 0

Signal_ON = (+8dB) + 10log(min_assert_level)

b) Signal_ON = (+1dB) + 10log(max_deassert_level)

Signal_OFF = 0

2) Receiver operates at overload.

Signal_OFF = 0

Signal_ON = 1.2VP-P

max_deassert_level and the min_assert_level are measured for one LOS_THRESHOLD setting.

Note 8: Gain stability is defined as [(I_measured) - (I_reference)]/(I_reference) over the listed current range, temperature, and VCC

from +2.95V to +3.63V. Reference current measured at VCC = +3.2V, TA = +25°C.

Note 9: Transmitter deterministic jitter is measured with a repeating 27 - 1 PRBS, 72 0s, 27 - 1 PRBS, and 72 1s pattern at

10.32Gbps. For 1.0625Gbps to 8.5Gbps, a repeating K28.5 pattern [00111110101100000101] is used. Deterministic jitter is

defined as the arithmetic sum of PWD and PDJ.

Note 10: Gain stability is defined as [(I_measured) - (I_reference)]/(I_reference) over the listed current range, temperature, and VCC

from +2.85V to +3.63V. Reference current measured at VCC = +3.3V, TA = +25°C.

VCCR 1000pF

1nF

4.7kΩ

CONTROLLER

VCCR

VCCR

LOS

50Ω

OSCILLOSCOPE

MSEL

0.1μF

50Ω

ROUT+

0.1μF

50Ω

ROUT-

50Ω

VCC

0.1μF

CONTROLLER

VCCD

1000pF

DISABLE

VCCD

CONTROLLER

1μH

VCCR

VCCT

0.1μF VCCD

0.1μF

MAX3798

0.1μF

VCCT

400Ω

0.1μF

VCCT

VEER

VEET

BMAX

FAULT

BIAS

TOUT+

TOUT-

400Ω

4.7kΩ

CONTROLLER

0.1μF

50Ω

0.1μF

50Ω

50Ω

OSCILLOSCOPE

VCCT

50Ω

VCCT

0.1μF

1kΩ

1000pF

Figure 1. Test Circuit for VCSEL Driver Characterization

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