Analog Devices EVAL-ADGS5412SDZ, Руководство пользователя

Страница: 4 / 12

UG-1141 EVAL-ADGS5412SDZ User Guide
Rev. 0 | Page 4 of 12
EVALUATION BOARD HARDWARE
POWER SUPPLIES
Connector J1 provides access to the supply pins of the
ADGS5412 . V
DD
, GND, and V
SS
on J1 terminal block link to the
appropriate pins on the ADGS5412 . For dual-supply voltages,
the evaluation board can be powered from ±9 V to ±22 V. For
single-supply voltages, the GND and V
SS
terminals must
connect together and power the evaluation board with 9 V to 40
V. Additionally, 3.3 V is supplied to the V
L
pin of the
ADGS5412 by the SDP when Link LK1 is in Position B. When
controlling the ADGS5412 by another method other than the
SDP, supply between 2.7 V and 5.5 V to the V
L
pin of the
ADGS5412 via the EXT_VL screw terminal input on J1. LK1 must
be in Position A.
INPUT SIGNALS
Two screw connectors, J2 and J3, are provided to connect to
both the source and drain pins of the
ADGS5412. Additional
subminiature version B (SMB) connector pads are available if
extra connections are required.
Each trace on the source and drain side includes two sets of
0603 pads, which can place a load on the signal path to ground.
A 0 Ω resistor is placed in the signal path and can be replaced
with a user defined value. The resistor combined with the 0603
pads can create a simple resistor-capacitor (RC) filter.
LINK OPTIONS
A number of link options are provided on the EVAL-
ADGS5412SDZ evaluation board that must be set for the
required operating conditions before using. Table 1 describes
the positions of the links to control the evaluation board via the
SDP board using a PC and external power supplies. The
functions of these link options are described in detail in Table 2.
When using the SDP in conjunction with the EVAL-
ADGS5412SDZ, LK1 must be in Position B to avoid damage to
the SDP.
Table 1. Link Options for SDP Control (Default)
Link Number Option
LK1 B
LK2 B
Table 2. Link Functions
Link Number Function
LK1 This link selects the source of the V
L
voltage supplied to the ADGS5412 .
Position A selects EXT_VL from J1.
Position B selects the 3.3 V from the SDP.
LK2 This link selects how a hardware reset is performed.
Position A indicates the SW1 push button performs a hardware reset.
Position B indicates the SDP can perform a hardware reset.