EVAL-AD7799EBZ Analog Devices Inc, EVAL-AD7799EBZ Datasheet - Page 10

• Manufacturer Part Number: EVAL-AD7799EBZ
• Description: BOARD EVALUATION FOR AD7799
• Manufacturer: Analog Devices Inc

Specifications of EVAL-AD7799EBZ

• Number Of Adc's: 1
• Number Of Bits: 24
• Sampling Rate (per Second): 470
• Data Interface: Serial
• Inputs Per Adc: 3 Differential
• Input Range: ±VREF/gain
• Power (typ) @ Conditions: 2.5mW @ 470SPS
• Voltage Supply Source: Analog and Digital
• Operating Temperature: -40°C ~ 105°C
• Utilized Ic / Part: AD7799
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

EVAL-AD7799
TEMP DEMO WINDOW
This window is accessed by clicking Temp Demo. The AD7799
evaluation board has a temperature demonstration included on
board. To operate the temperature demonstration, LK3 to LK6
should be inserted and LK1, LK2, LK7, LK8, and LK10 should
be removed. With this configuration, a 1 kΩ thermistor is
connected to the AIN2(+)/AIN2(−) channel. In series with the
thermistor is a 5 kΩ precision resistor, which is connected to
the AD7799 reference pins. The thermistor and precision
resistor are connected to AV
DD
in a ratiometric configuration.
Figure 6. AD7799 Evaluation Software Temperature Demo Window
Rev. 0 | Page 10 of 10
The temperature demonstration software saves the values in the
mode register, configuration register, and IO register and then
configures the AD7799 to operate with the AIN2(+)/AIN2(−)
channel. The gain is set to 1, and the reference voltage is
adjusted appropriately. The software continuously reads the
conversion from the AIN2(+)/AIN2(−) channel and converts
the result to temperature using a look-up table.
To exit the temperature demonstration, click Back. The software
sets the configuration register, mode register, and IO register to
their pretemperature demonstration values.