Datasheet

V
CC
LMH0384
V
EE
SDI
SDI
SDO
DAP
1
2
3
4 9
10
11
12
5 6 7 8 13
14 15 16
SPI_EN
SDO
MISO
AEC+
AEC-
MUTE
REF
MOSI
V
CC
V
CC
SCKCD
SS
Coaxial Cable
75:
37.4:
75:
5.6 nH
1.0 PF
1.0 PF
1.0 PF
V
CC
0.1 PF
Differential
Output
V
CC
0.1 PF
CD
MUTE
REF
(SPI) SS
(SPI) MOSI
(SPI) SCK
(SPI) MISO
LMH0384
www.ti.com SNLS308F –APRIL 2009–REVISED APRIL 2013
4. Set the sleep mode to auto by writing “01” to bits [4:3] of register 00h. Alternately, sleep mode may be set to
off by writing “00” to bits [4:3] of register 00h.
APPLICATION INFORMATION
APPLICATION CIRCUIT (SPI MODE)
Figure 9 shows the application circuit for the LMH0384 in SPI mode.
Figure 9. Application Circuit (SPI Mode)
REPLACING THE LMH0344
In pin mode, the LMH0384 is a drop-in replacement for the LMH0344SQ SDI cable equalizer. When replacing an
LMH0344 with an LMH0384, it is important to consider the following points:
1. The LMH0384 auto sleep function is mapped to pin 12 which is a ground pin on the LMH0344SQ. When this
pin is grounded on the LMH0384, the auto sleep function is disabled. To enable auto sleep mode on the
LMH0384, pin 12 must be pulled high.
2. Pin 4 and pin 9 on the LMH0344SQ are true ground pins. For the LMH0384, pin 4 and pin 9 may be driven
logic low in pin mode (they do not require a true ground connection).
3. The LMH0384 has lower input capacitance than the LMH0344 which allows for improved input return loss.
The input return loss network may need to be modified. In most cases, the LMH0384 should provide superior
input return loss.
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Product Folder Links: LMH0384