EVAL-ADT7461EBZ Analog Devices Inc, EVAL-ADT7461EBZ Datasheet - Page 2

• Manufacturer Part Number: EVAL-ADT7461EBZ
• Description: BOARD EVALUATION FOR ADT7461
• Manufacturer: Analog Devices Inc

Specifications of EVAL-ADT7461EBZ

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

CONNECTORS, SWITCHES, AND INDICATORS
The function of the various connectors, links, and indicators on
the evaluation board are explained below.
Test Connector J1
This connector allows the user easy access to all the signals on
the pins of the ADT7461. This connector is also used to con-
nect an external remote thermal diode between the D+ and D–
terminals of the ADT7461.
Centronics Interface Cable J2
The evaluation board and the personal computer may be con-
nected via the printer parallel port using the Centronics cable
provided.
Power Connector J3 and Switch SW1
Power can be supplied to the board either via the Centronics
cable or via the power connector J3. If the switch is at J2, then
power is supplied from the parallel port; if the switch is at J3,
then power is supplied from the power connector.
Remote Sensor Select LK1
The function of this jumper is to allow the user to choose
between measuring temperature using the on-board remote
sensor and an external one connected between the D+ and D–
terminals of J1. When the middle pin is linked to B, the on-board
sensor is used, and when the middle pin is linked to A, an
off-board sensor is used.
LK1 Position
EVAL-ADT7461
A
B
CONNECTOR
TEST
Table I. ADT7461 Sensor Selection
J1
ALERT
SDATA
SENSOR
SCLK
GND
VDD
PNP
D+
D–
Sensor Selected
External Sensor
On-Board PNP Sensor
LK1
B
A
Figure 1. ADT7461 Evaluation Board Block Diagram
R
R
VAR1
VAR1
LK2
LK2
B
A
B
A
D+
D–
ADT7461
THERM
ALERT
SDATA
SCLK
V
POWER
GREEN
DD
THERM
RED
D1
D3
–2–
V
D+ Series Variable Resistor Select LK2
The function of this jumper is to allow the user to include a
variable resistor (R
ADT7461. The user can investigate the series resistance
cancellation feature of the part by varying this resistor. When
the middle pin is linked to A, the variable resistor is connected
in series with the D+ input. When the middle pin is linked to B,
the variable resistor is disconnected from the ADT7461. R
maximum = 2 kΩ.
LK2 Position
D– Series Variable Resistor Select LK3
The function of this jumper is to allow the user to include a
variable resistor (R
ADT7461. The user can investigate the series resistance cancel-
lation feature of the part by varying this resistor. When the
middle pin is linked to A, the variable resistor is connected in
series with the D– input. When the middle pin is linked to B,
the variable resistor is disconnected from the ADT7461. R
maximum = 2 kΩ.
LK3 Position
DD
J3
V
A
B
A
B
DD
SW1
D2
RED
ALERT/THERM2
J2
BUFFERS
CONNECTOR
ALTERNATE
POWER
Table III. D– R
Table II. D+ R
VAR1
VAR2
) in series with the D+ input on the
) in series with the D– input on the
Selection
R
R
Selection
R
R
CENTRONICS
CONNECTOR
VAR1
VAR1
VAR2
VAR2
36-WAY
J2
connected in series with D+
not connected
connected in series with D–
not connected
VAR1
VAR2
Selection
Selection
PC
REV. B
VAR1
VAR2