Datasheet
LMH0384
SNLS308F –APRIL 2009–REVISED APRIL 2013
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AC Electrical Characteristics
Over Supply Voltage and Operating Temperature ranges, unless otherwise specified
(1)
.
Symbol Parameter Conditions Reference Min Typ Max Units
BR
MIN
Minimum Input Data Rate SDI, SDI 125 Mbps
BR
MAX
Maximum Input Data Rate 2970 Mbps
Jitter for Various Cable Lengths 270 Mbps, Belden 1694A,
0.2 UI
0-350 meters
(2)
270 Mbps, Belden 1694A,
0.2 UI
350-400 meters
1.485 Gbps, Belden 1694A,
0.25 UI
0-170 meters
(2)
1.485 Gbps, Belden 1694A,
0.3 UI
170-200 meters
2.97 Gbps, Belden 1694A,
0.3 UI
0-110 meters
(2)
2.97 Gbps, Belden 1694A,
0.35 UI
110-140 meters
t
r
,t
f
Output Rise Time, Fall Time 20% – 80%, 100Ω load
(3)
, SDO, SDO
80 130 ps
Figure 1
Mismatch in Rise/Fall Time
(3)
2 15 ps
t
OS
Output Overshoot
(3)
1 5 %
RL
IN
Input Return Loss 5 MHz - 1.5 GHz
(4)
SDI, SDI 15 dB
1.5 GHz - 3.0 GHz
(4)
10 dB
R
IN
Input Resistance single-ended 1.3 kΩ
C
IN
Input Capacitance single-ended 0.7 pF
(1) Typical values are stated for V
CC
= +3.3V and T
A
= +25°C.
(2) Based on design and characterization data over the full range of recommended operating conditions of the device. Jitter is measured in
accordance with SMPTE RP 184, SMPTE RP 192, and the applicable serial data transmission standard: SMPTE 424M, SMPTE 292M,
or SMPTE 259M.
(3) Specification is guaranteed by characterization.
(4) Input return loss is dependent on board 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 75Ω series resistor on the input.
SPI Interface AC Electrical Characteristics
Over Supply Voltage and Operating Temperature ranges, unless otherwise specified
(1)
.
Symbol Parameter Conditions Reference Min Typ Max Units
Recommended Input Timing Requirements
f
SCK
SCK Frequency SCK 20 MHz
t
PH
SCK Pulse Width High Figure 2, Figure 3 % SCK
40
period
t
PL
SCK Pulse Width Low % SCK
40
period
t
SU
MOSI Setup Time Figure 2, Figure 3 MOSI 4 ns
t
H
MOSI Hold Time 4 ns
t
SSSU
SS Setup Time Figure 2, Figure 3 SS 4 ns
t
SSH
SS Hold Time 4 ns
t
SSOF
SS Off Time 10 ns
Switching Characteristics
t
ODZ
MISO Driven-to-Tristate Time Figure 3 MISO 15 ns
t
OZD
MISO Tristate-to-Driven Time 15 ns
t
OD
MISO Output Delay Time 15 ns
(1) Typical values are stated for V
CC
= +3.3V and T
A
= +25°C.
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