MAX7500EVKIT+ Maxim Integrated Products, MAX7500EVKIT+ Datasheet - Page 5

• Manufacturer Part Number: MAX7500EVKIT+
• Description: KIT EVAL FOR MAX7500
• Manufacturer: Maxim Integrated Products

Specifications of MAX7500EVKIT+

• Sensor Type: Temperature
• Sensing Range: -55°C ~ 125°C
• Interface: I²C
• Sensitivity: ±2°C
• Voltage - Supply: 3 V ~ 5.5 V
• Embedded: No
• Utilized Ic / Part: MAX7500
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The MAX7500 has eight available slave addresses that
can be selected by setting the A2, A1, and A0 pins
either high or low. The EV kit provides jumpers JU2,
JU3, and JU4 to set A2, A1, and A0, respectively. JU2
also provides an additional option useful for evaluating
the MAX7501–MAX7504 that will be discussed in a later
section. The default configuration of the EV kit sets A2,
A1, and A0 low, resulting in a slave address of 0x90.
To use the MAX7500 EV kit with a user-supplied
I
JU8 to the 1-2 position. Then, connect the SDA and SCL
signals to the corresponding SDA and SCL pads on the
MAX7500 EV kit board. R6 and R7 footprints are provid-
ed for the option to add pullup resistors if needed.
The MAX7500 EV kit can also be configured to accept
the MAX7501–MAX7504. To evaluate the MAX7501–
MAX7504, replace the IC (U1) and set JU2 to pins 1-3
(RESET input).
To utilize the RESET input on the MAX7501–MAX7504,
JU14 must also be set accordingly: Pins 1-2 for an
external RESET input or pins 2-3 for software control of
the RESET input. Note: To apply an external RESET
signal, apply a low pulse with a duration of at least 1µs
at the RESET pad. Refer to the MAX7501–MAX7504 IC
data sheet for additional information.
The MAX7500 EV kit software accurately reads temper-
ature data with a 0.5°C resolution, sets the upper and
lower temperature threshold limits, and configures the
behavior of the open-drain overtemperature shutdown
(OS) output. The MAX7500 supports eight different I
slave addresses; configure JU2, JU3, and JU4 to select
between different addresses. Check the Shutdown
checkbox (Figure 1) to shut down the MAX7500 internal
blocks. By pressing the Defaults button, the device is
restored to its power-on-reset (POR) state. Refer to the
MAX7500–MAX7504 IC data sheet for further details.
2
Setting the I
C/SMBus interface, first move the shunts of JU6 and
Detailed Description of Software
Evaluating the MAX7501–MAX7504
User-Supplied I
2
_______________________________________________________________________________________
C Slave Address (A2, A1, A0)
2
C/SMBus Interface
2
C
MAX7500 Evaluation Kit
Temperature data is displayed on the software main
window (Figure 1). To read temperature, press the
Read button and the sensor temperature is displayed
on the software interface with a 0.5°C resolution. The
Auto-Read checkbox is provided to continuously read
and display the temperature and limit registers’ data
when checked.
The OS Fault indicator is displayed under the tempera-
ture data on the software’s main GUI. The indicator
asserts (turns red) when the OS is asserted. The indica-
tor deasserts (turns green) when the OS is deasserted.
Refer to the T
MAX7500–MAX7504 IC data sheet for more information.
The T
appropriate values in the TOS and THYST edit boxes
and pressing their respective Write button. The current
contents of the T
by pressing on the Read button.
The Configuration group box sets the fault queue, OS
polarity, shutdown control, and whether the OS output
functions in comparator or interrupt mode. The Fault
Queue drop-down list determines the number of faults
necessary to trigger an OS condition. The OS Polarity
drop-down list forces the OS polarity to either active-
low or active-high. The Shutdown checkbox, when
checked, shuts down the internal blocks and drops the
supply current to 3µA.
The Mode drop-down list selects between running the
OS output in comparator or interrupt modes. In com-
parator mode, OS is asserted when the temperature
rises above the T
temperature drops below the T
mode, OS is asserted when the temperature rises
above the T
and OS is deasserted only after performing a read
operation.
OS
and T
Setting T
OS
OS
HYST
value or falls below the T
OS
OS
and T
registers can be set by writing the
value and is deasserted when the
and T
HYST
OS
Configuration Register
HYST
Reading Temperature
and T
Registers section in the
HYST
registers can be read
HYST
value. In interrupt
Registers
HYST
value
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