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MAX3799ETJ+ Datasheet(PDF) 7 Page - Maxim Integrated Products |
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MAX3799ETJ+ Datasheet(HTML) 7 Page - Maxim Integrated Products |
7 / 35 page 1Gbps to 14Gbps, SFP+ Multirate Limiting Amplifier and VCSEL Driver _______________________________________________________________________________________ 7 ELECTRICAL CHARACTERISTICS (continued) (VCC = 2.85V to 3.63V, TA = -40°C to +85°C, CML receiver output load is AC-coupled to differential 100 Ω, CAZ = 1nF, transmitter out- put load is AC-coupled to differential 100 Ω (see Figure 1), typical values are at +25°C, VCC = 3.3V, IBIAS = 6mA, IMOD = 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 RATE_SEL bit was used and the RSEL pin was left open.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS SDA Setup Time tDS 100 ns SDA Hold Time tDH 100 ns SCL Rise to SDA Propagation Time tD 5ns CSEL Pulse-Width Low tCSW 500 ns CSEL Leading Time Before the First SCL Edge tL 500 ns CSEL Trailing Time After the Last SCL Edge tT 500 ns SDA, SCL External Load CB Total bus capacitance on one line with 4.7k pullup to VCC 20 pF Note 1: Supply current is measured with unterminated receiver CML output or with AC-coupled Rx output termination. The Tx out- put and the bias current output must be connected to a separate supply to remove the modulation/bias current portion from the supply current. BIAS must be connected to 2.0V. TOUT+/- must be connected through 50 Ω load resistors to a separate supply voltage. Note 2: Guaranteed by design and characterization, TA = -40°C to +95°C. Note 3: The data input transition time is controlled by a 4th-order Bessel filter with -3dB frequency = 0.75 x data rate. The determin- istic jitter caused by this filter is not included in the DJ generation specifications. Note 4: Test pattern is 00001111 at 1.25Gbps for RATE_SEL = 0. Test pattern is 00001111 at 8.5Gbps for RATE_SEL = 1. Note 5: Receiver deterministic jitter is measured with a repeating 231 - 1 PRBS equivalent pattern at 10.32Gbps. For 1.25Gbps 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. |
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