MAX1276EVKIT Maxim Integrated, MAX1276EVKIT Datasheet - Page 14

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MAX1276EVKIT

Manufacturer Part Number
MAX1276EVKIT
Description
Data Conversion IC Development Tools Evaluation Kit/Evaluation System for the MAX1070/71/72/75#79/MAX1224/25/MAX1274#79
Manufacturer
Maxim Integrated
Series
MAX1276, MAX1278r
Datasheet

Specifications of MAX1276EVKIT

Interface Type
QSPI, Serial (SPI, Microwire)
The MAX1276EVKIT board can be used to evaluate any
member of the MAX1070/MAX1071/MAX1072/MAX1075–
MAX1079/MAX1224/MAX1225/MAX1274–MAX1279 fami-
ly. Replace U1 with the device to be tested and set
jumpers and power supplies as shown in Tables 3–6. If
using the 68HC16 module, make the appropriate selec-
tions in the Device Parameter section of the program
window. Note: Only those devices operating with 5V sup-
plies can be used with the Maxim 68HC16MODULE (see
Table 4).
Problem: Excessive current through one or
more supplies.
• Examine all input signals to the DUT. Ensure that
• If using on-board buffers, be sure that the buffer
• Check VLOGIC voltage and all SPI inputs. The
• Check DOUT for excessive loading or short circuits.
MAX1276 Evaluation Kit/Evaluation System
Figure 7. Input-Capacitor Options
14
they are bounded by VDD and GND.
supply voltages are applied.
MAX1276 is specified for VLOGIC ranging from 1.8V
up to VDD. Note: VLOGIC and VDD must be set to
5.0V when using the EV kit with the 68HC16 module.
If DOUT has been excessively loaded, the internal
protection circuitry may activate, requiring power
cycling to recover.
______________________________________________________________________________________
Evaluating Other Devices
AS SUPPLIED
Troubleshooting
Problem: No output measurement. System seems to
report zero voltage, or fails to make a measurement.
• If the ADC under test is the MAX1276, use Tables 1
• Make sure JU5 and JU6 are shunted or bridged
• Use a digital voltmeter to check AVDD, VLOGIC,
• Use an oscilloscope to verify the levels to AIN+ and
• Verify that both inputs are between GND and VDD.
• Verify the SPI timing and levels. If using the Maxim
and 2 to verify the proper jumper positions and volt-
ages. If the ADC has been replaced, use Tables 3,
4, and 5 to verify the jumper positions.
using an ammeter when measuring supply currents.
+7V, -3V, and VREF voltages.
AIN- by probing the appropriate location in JU1 and
JU2. Use the AIN+ SENSE and AIN- SENSE pads to
verify DC input levels with the test device connect-
ed. (Note: The isolation resistors limit the bandwidth
of AC measurement using the AIN+ SENSE and
AIN- SENSE pads).
Verify that AIN levels are range compatible with the
device selected (i.e., if the AIN- voltage is greater than
AIN+, unipolar parts always read zero). See the appro-
priate part of the Input-Signal Setup Procedure section
and verify that proper input conditions are met.
software, set the SPI conversion to run continuously
and use an oscilloscope to verify that the conver-
sion-start signal, serial clock, and the data output
signals (CONVST, SCLK, and DOUT) have the prop-
er timing. Marked pads are available for the oscillo-
scope probes.
ALTERNATE

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