Datasheet

MAX4951AE Evaluation Kit
Evaluates: MAX4951AE
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Characterization Circuit (U2)
The characterization circuit is provided as a separate
test circuit for eye diagram evaluation of the MAX4951AE
IC. This circuit provides differential SMA inputs and out-
puts with 50I controlled-impedance traces. Channel B
is not utilized in this section of the EV kit, but provides the
same performance as channel A.
Input Supply (VCC)
The characterization circuit is powered by an external
+3.3V power supply connected between the VCC and
GND pads.
Device Enable (JU5)
The MAX4951AE (U2) is enabled/disabled by config-
uring jumper JU5 (see Table 6). When disabled, the
MAX4951AE buffers are powered down and the part is
placed in low-power mode.
Output Boost Control (JU7)
The MAX4951AE’s channel A can be evaluated with
standard SATA output levels or with boosted output lev-
els. Configure jumper JU7 to enable/disable channel A
output boost (see Table 7).
Calibration Traces
The lower half of the MAX4951AE EV kit provides two
sets of calibration traces that can be used for further
analysis. The lengths of the calibration traces are
matched to the traces going from the SMA connector to
MAX4951AE (U2) of the characterization circuit. The first
calibration trace includes a 50I load termination and the
second calibration trace is a through trace.
Table 6. Jumper JU5 Function Table 7. Jumper JU7 Function
*Default position.
*Default position.
SHUNT
POSITION
EN PIN (U2) DESCRIPTION
1-2*
Connected to
+3.3V
Buffers enabled for
normal operation
2-3
Connected to
GND
Buffers disabled and
device is in low-power
standby mode
SHUNT
POSITION
BA PIN (U2) DESCRIPTION
1-2
Connected to
+3.3V
Channel A output boost
enabled
2-3*
Connected to
GND
Channel A output boost
disabled (standard SATA
output levels)
Not
installed
Not connected