20%

80%

V

-

OD

V

+

OD

V

OS

V

= (V

+) – (V

-)

SSP-P

OD

OD

0V differential

t

r

+ V

OD

20%

80%

t

f

V

SSP-P

- V

OD

LMH0384

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SNLS308G – APRIL 2009 – REVISED JUNE 2015

AC Electrical Characteristics (continued)

Over Supply Voltage and Operating Temperature ranges, unless otherwise specified

(1).

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

15

dB

Input Return Loss (SDI, SDI)

10

dB

Input Resistance (SDI, SDI)

single-ended

1.3

k

Ω

Input Capacitance (SDI, SDI)

single-ended

0.7

pF

(4)

Input return loss is dependent onboard design. The LMH0384 exceeds this specification on the SD384 evaluation board with a return

loss network consisting of a 5.6 nH inductor in parallel with the 75-

Ω series resistor on the input.

6.7 Timing Requirements

over operating free-air temperature range (unless otherwise noted)

MIN

TYP

MAX

UNIT

SCK Frequency

20

MHz

% SCK

SCK Pulse Width High

40

period

See Figure 2 and Figure 3

% SCK

SCK Pulse Width Low

40

period

MOSI Setup Time

4

ns

See Figure 2 and Figure 3

MOSI Hold Time

4

ns

SS Setup Time

4

ns

SS Hold Time

See Figure 2 and Figure 3

4

ns

SS Off Time

10

ns

6.8 Switching Characteristics

over operating free-air temperature range (unless otherwise noted)

MIN

TYP

MAX

UNIT

MISO Driven-to-Tristate Time

15

ns

MISO Tristate-to-Driven Time

See Figure 3

15

ns

MISO Output Delay Time

15

ns

Figure 1. LVDS Output Voltage, Offset, and Timing Parameters

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