Evaluation Board Hardware; Power Supplies; Input Signals; Digital Outputs - Analog Devices EVAL-ADGS1208SDZ User Manual

UG-1271

EVALUATION BOARD HARDWARE

POWER SUPPLIES

Connector J1 provides access to the supply pins of the ADGS1208/
ADGS1209. V , GND, and V
DD
appropriate pins on the ADGS1208/ADGS1209. For dual-supply
voltages, the evaluation board can be powered from ±15 V. For
single-supply voltages, the GND and V
connect together and power the evaluation board from 12 V.
Additionally, the SDP supplies 3.3 V to the RESET /V
ADGS1208/ADGS1209 when Link LK1 is in Position B. When
using a method other than the SDP to control the ADGS1208/
ADGS1209, supply between 2.7 V and 5.5 V to the RESET /
V pin of the ADGS1208/ADGS1209
L
terminal input on J1. LK1 must be in Position A.

INPUT SIGNALS

Provided are screw connectors J2, J3, and J6 to connect to both
the source and drain pins of the ADGS1208/ADGS1209.
Additional Subminiature Version B (SMB) connector pads are
available if extra connections are required.
Each trace on the source and drain pins includes two sets of
0603 pads, which 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, creates a simple resistor capacitor filter.
Table 2. Link Functions
Link Number Function
LK1 This link selects the source of the V
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 can perform a hardware reset.
Position B indicates the SDP can perform a hardware reset.
EVAL-ADGS1208SDZ/EVAL-ADGS1209SDZ
on the J1 terminal block link to the
SS
terminals must
SS
pin of the
L
via the EXT_VL screw

DIGITAL OUTPUTS

The GPOx digital outputs are accessible from Screw Connector J7
and there are additional SMB connector footprints available if
extra connections are required.

LINK OPTIONS

The EVAL-ADGS1208SDZ/EVAL-ADGS1209SDZ evaluation
boards provide several link options that must be set at the
required operating conditions before use.
Table 1 describes the positioning of the links necessary for
controlling the evaluation board via the SDP board using a PC
and external power supplies. Table 2 describes the functions of
these link options.
LK1 must be in Position B to avoid damaging the SDP when
using it in conjunction with the EVAL-ADGS1208SDZ/
EVAL-ADGS1209SDZ.
Table 1. Link Options for SDP Control (Default)
Link Number
LK1
LK2
voltage supplied to the ADGS1208/ADGS1209.
L
Rev. 0 | Page 4 of 17
User Guide
Option
B
B