MAX1499EVKIT Maxim Integrated, MAX1499EVKIT Datasheet - Page 2

• Manufacturer Part Number: MAX1499EVKIT
• Description: Data Conversion IC Development Tools Evaluation Kit/Evaluation System for the MAX1499
• Manufacturer: Maxim Integrated
• Series: MAX1497, MAX1499r

Specifications of MAX1499EVKIT

• Interface Type: QSPI, Serial (SPI, Microwire)
• Operating Supply Voltage: 2.7 V to 5.25 V

9) Apply an input signal in the range -2V to +2V
10) To view a graph of the measurements, pull down
The Measurement tab of the evaluation software mimics
the behavior of a digital voltmeter (DVM). The status bits
are polled approximately once per second. Whenever
the Data status bit is one, the ADC result register is read
and displayed as Analog Input Code. The MAX1499
also displays the result on its own LED display.
The EV kit is not a complete DVM. Additional input scal-
ing and protection circuitry might be required.
Whenever the Measurement tab is activated, the soft-
ware offers to clear the spi/adc and seg_sel control
bits to zero if they are not already clear.
The evaluation software implements several math func-
tions found in physical systems. Whenever the Math
tab is activated, the software offers to set the spi/adc
control bit to one if it is not already set. The software
also offers to clear the seg_sel control bit to zero if it is
not already clear.
The evaluation software intercepts the ADC result prior
to display, calculating a new LED display value when-
ever the Measurement or Math tab is active and the
spi/adc control bit is set to one. Math results are
graphed as channel one data, alongside the raw ADC
result as channel zero data.
The Type K Thermocouple function can be used
along with a suitable cold junction connection to con-
vert a type K thermocouple's measured Seebeck volt-
age into temperature in degrees centigrade. The a0
coefficient 230 represents a cold junction temperature
of +23°C.
The Control Register tab provides access to all control
register bits. Drop down the appropriate combo-box
and then click write.
The Results, Displays, Limits tab provides access
to the two's-complement data registers. Each register
has a read button and a write button, except for ADC
Limit Registers, ADC Offset, ADC Result,
between AIN+ and AIN-. Observe the readout on
the screen.
the View menu and click Graph.
MAX1499 Evaluation Kit/MAX1499 Evaluation
_______________________________________________________________________________________
Detailed Description of
LED Display, and Peak
Math Processing
Control Register
Measurement
Software
RESULT1, ADC RESULT2, and PEAK RESULT, which
are read only.
Reading the ADC RESULT1 or ADC RESULT2 register
automatically updates the LED display, regardless of
the seg_sel control register setting.
Writing to the ADC OFFSET register affects ADC
RESULT1 and ADC RESULT2, regardless of the off-
set_cal1 control register setting.
The LED Segments tab lets the user turn individual
LED segments on and off by clicking them with the
mouse.
Whenever the LED Segments tab is activated, the soft-
ware offers to set the seg_sel control bit to one if it is
not already set.
The Write LED Text button translates a text string into
approximate seven-segment characters, and then
writes the character patterns to the LED display.
The evaluation software has two options for graphing
data. A graph of recent data can be displayed by
selecting the View menu and then Graph. Data can be
viewed as a time sequence plot, a histogram plot, or as
a table of raw numbers. To control the size and timing
of the data runs, activate the sampling tool by clicking
the main window's Collect Samples button.
Sampled data can be saved to a file in comma-delimit-
ed or tab-delimited format. Line numbers and a
descriptive header line are optional.
Channel zero plots raw 16-bit ADC result data. Channel
one plots LED display data, if math processing is
enabled. If extended resolution is enabled, channel two
plots raw 20-bit ADC result data.
The diagnostics window is used for factory testing prior
to shipping the evaluation kit. It is not intended for cus-
tomer use.
The MAX1499 device under test (U1) is a low-power,
4.5-digit ADC with integrated LED display drivers. The
MAX6062 (U5) provides on-board 2.048V reference
voltage. See the MAX1499 EV kit schematic in Figure 7
and refer to the MAX1499 data sheet.
The EV kit includes a MAX1659 high-current 5V linear
regulator (U2) and a set of MAX1840/MAX1841 level
shifters (U3 and U4) to support the use of 3V logic.
Detailed Description of
LED Segment Registers
Diagnostics Window
System
Hardware
Graph
3