Maxim MAX1416EVC16, MX7705EUE, MAX1415EUE manual Jumper Functions

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MAX1416 Evaluation Kit/ Evaluation System

Evaluates: MAX1416/MAX1415/MX7705

Problem: Internal oscillator does not work.

The internal-oscillator mode is a feature of the MAX1416/MAX1415 only, and is not supported on the MX7705. The MX7705 requires an external clock, and can only be used with INT = 0. To observe the internal oscillator driving the MCLKOUT pin, U1 must be a MAX1416 or MAX1415, and the clock register must have INT = 1 and CLKDIS = 0.

Problem: Measurements are erratic or unstable or there is poor accuracy.

Check the reference voltage using a digital voltmeter. Use an oscilloscope to check for noise. When probing for noise, keep the oscilloscope ground-return lead as short as possible, preferably less than 1/2 in (10mm).

Problem: Unacceptable errors when measuring a transducer.

Although most signal sources can be connected direct- ly to the MAX1416’s analog input, some high-imped- ance signal sources may require using the internal input buffer (BUF = 1).

Problem: PDA hot-sync software or other device soft- ware interferes with EV kit software.

COM ports can only be used by one device at a time. Disable PDA hot-sync manager.

Table 1. Jumper Functions

JUMPER

SHUNT

FUNCTION

POSITION

 

 

 

 

 

 

Closed*

U2 (MAX873) supplies REF+

JU1

reference voltage

 

 

 

 

 

Open

REF+ must be externally connected

 

 

 

JU2

Closed*

REF- connects to ground at U2

 

 

Open

REF- must be externally connected

 

 

 

 

 

1-2*

MCLKIN connects to crystal Y1

 

 

 

 

Open

MCLKIN is not connected

JU3

 

 

 

MCLKIN connects to ground

 

 

 

2-3

(MAX1416/MAX1415 internal-

 

 

oscillator mode only)

 

 

 

 

Closed*

MCLKOUT drives crystal Y1

JU4

 

MCLKOUT is not connected

Open

(MAX1416/MAX1415 internal-

 

 

 

oscillator mode only)

 

 

 

*Default configuration

QSPI is a trademark of Motorola, Inc.

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Contents MAX1416 Evaluation Kit Evaluation System MAX1416 Evaluation Kit Evaluation System MAX1416/MAX1415/MX7705 Jumper Functions MAX1416 Evaluation Kit Evaluation System Page MAX1416 Evaluation Kit Evaluation System Page MAX1416 Evaluation Kit Evaluation System Page MAX1416-Saving Graphs to Disk Evaluates MAX1416/MAX1415/MX7705 MAX1416 EV Kit Component Placement Guide-Component Side MAX1416 EV Kit PC Board Layout -Solder Side