National Semiconductor LMH0302 Technical data
LMH0302
3Gbps HD/SD SDI Cable Driver
LMH0302 3Gbps HD/SD SDI Cable Driver
August 1, 2008
General Description
The LMH0302 3Gbps HD/SD SDI Cable Driver is designed
for use in SMPTE 424M, SMPTE 292M, SMPTE 344M, and
SMPTE 259M serial digital video applications. The LMH0302
drives 75Ω transmission lines (Belden 1694A, Belden 8281,
or equivalent) at data rates up to 2.97 Gbps.
The LMH0302 provides two selectable slew rates for SMPTE
259M and SMPTE 424M / 292M compliance. The output driver may be powered down via the output driver enable pin.
The LMH0302 is powered from a single 3.3V supply. Power
consumption is typically 125 mW in SD mode and 165 mW in
HD mode. The LMH0302 is available in a 16-pin LLP package.
Typical Application
Features
SMPTE 424M, SMPTE 292M, SMPTE 344M, and SMPTE
■
259M compliant
Data rates to 2.97 Gbps
■
Supports DVB-ASI at 270 Mbps
■
Differential input
■
75Ω differential output
■
Selectable slew rate
■
Output driver power down control
■
Single 3.3V supply operation
■
Industrial temperature range: −40°C to +85°C
■
Typical power consumption: 125 mW in SD mode and
■
165 mW in HD mode
16–pin LLP package
■
Footprint compatible with the LMH0002SQ
■
Replaces the Gennum GS2978
■
Applications
SMPTE 424M, SMPTE 292M, SMPTE 344M, and SMPTE
■
259M serial digital interfaces
Digital video routers and switches
■
Distribution amplifiers
■
20214602
© 2008 National Semiconductor Corporation 202146 www.national.com
Absolute Maximum Ratings (Note 1)
Supply Voltage: −0.5V to 3.6V
LMH0302
Input Voltage (all inputs) −0.3V to VCC+0.3V
Output Current 28mA
Storage Temperature Range −65°C to +150°C
Junction Temperature +125°C
Lead Temperature
(Soldering 4 Sec) +260°C
ESD Rating (HBM) 4.5 kV
ESD Rating (MM) 250V
ESD Rating (CDM) 2 kV
Recommended Operating Conditions
Supply Voltage (VCC – VEE): 3.3V ±5%
Operating Free Air Temperature (TA)
−40°C to +85°C
Package Thermal Resistance
θJA 16-pin LLP
θJC 16-pin LLP
+64°C/W
+26°C/W
DC Electrical Characteristics
Over Supply Voltage and Operating Temperature ranges, unless otherwise specified (Notes 2, 3).
Symbol Parameter Conditions Reference Min Typ Max Units
V
CMIN
V
SDI
V
CMOUT
V
SDO
V
IH
V
IL
I
CC
Input Common Mode Voltage SDI, SDI
Input Voltage Swing Differential
Output Common Mode Voltage SDO, SDO
Output Voltage Swing
Single-ended, 75Ω load,
R
= 750Ω 1%
REF
Input Voltage High Level SD/HD,
InputVoltage Low Level
Supply Current SD/HD = 0,
ENABLE
SDO/SDO enabled
SD/HD = 0,
SDO/SDO disabled
SD/HD = 1,
SDO/SDO enabled
SD/HD = 1,
SDO/SDO disabled
1.1 +
V
SDI
/2
VCC –
V
/2
SDI
100 2200
VCC –
V
SDO
V
720 800 880
2.0 V
0.8 V
50 59 mA
26 33 mA
38 48 mA
15 22 mA
mV
mV
V
P−P
P-P
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AC Electrical Characteristics
Over Supply Voltage and Operating Temperature ranges, unless otherwise specified (Note 3).
Symbol Parameter Conditions Reference Min Typ Max Units
DR
t
jit
tr,t
Mismatch in Rise/Fall Time SD/HD = 0 30 ps
Duty Cycle Distortion SD/HD = 0, 2.97 Gbps, (Note
t
OS
RL
Input Data Rate SDI, SDI
SDI
Additive Jitter 2.97 Gbps SDO, SDO
1.485 Gbps
270 Mbps
Output Rise Time, Fall Time SD/HD = 0, 20% – 80%, 90 130 ps
f
2970 Mbps
20
18
15
SD/HD = 1, 20% – 80% 400 800 ps
SD/HD = 1 50 ps
4)
SD/HD = 0, 1.485 Gbps, (Note
4)
27 ps
30 ps
SD/HD = 1, (Note 4) 100 ps
Output Overshoot SD/HD = 0, (Note 4) 10 %
SD/HD = 1, (Note 4) 8 %
Output Return Loss 5 MHz - 1.5 GHz, (Note 5) 15 dB
SDO
1.5 GHz - 3.0 GHz, (Note 5) 10 dB
ps
ps
ps
P-P
P-P
P-P
LMH0302
Note 1: "Absolute Maximum Ratings" are those parameter values beyond which the life and operation of the device cannot be guaranteed. The stating herein of
these maximums shall not be construed to imply that the device can or should be operated at or beyond these values. The table of "Electrical Characteristics"
specifies acceptable device operating conditions.
Note 2: Current flow into device pins is defined as positive. Current flow out of device pins is defined as negative. All voltages are stated referenced to
VEE = 0 Volts.
Note 3: Typical values are stated for VCC = +3.3V and TA = +25°C.
Note 4: Specification is guaranteed by characterization.
Note 5: Output return loss is dependent on board design. The LMH0302 meets this specification on the SD302 evaluation board.
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