EVB90609L-N2 Melexis Inc, EVB90609L-N2 Datasheet - Page 14

• Manufacturer Part Number: EVB90609L-N2
• Description: EVALUATION BOARD FOR MLX90609-N2
• Manufacturer: Melexis Inc

Specifications of EVB90609L-N2

• Sensor Type: Gyroscope, 1 Axis
• Sensing Range: ±75°/sec
• Interface: Analog and Digital
• Sensitivity: 26.67 mV/°/sec, 12.8 LSB/°/sec
• Voltage - Supply: 4.75 V ~ 5.25 V
• Embedded: No
• Utilized Ic / Part: MLX90609
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

There is a recommended sequence below to obtain digital data from the ADC.
Notes:
- The bit with leftmost position should be shifted first.
- Below “x” means any value: “0” or “1”.
•
Use SPI to send ADCC instruction (MOSI): 1 0 0 1 x 1 0 0 x x x x x x x x x x x x x x x x
And check 15th bit of the answer (MISO):
If 15
Before to go to the Step 2 provide a delay > 115 µs or wait till the EOC bit is set.
•
Use SPI to send ADCC instruction(MOSI):1 0 0 1 CHAN 1 0 0 x x x x x x x x x x x x x x x x
And check 15th bit of the answer (MISO):
If 15
CHAN bit specifies the input source of the ADC.
CHAN=0: The angular rate signal.
CHAN=1: The temperature sensor signal.
Go to the Step 3.
•
Use SPI to send ADCR instruction and check 15
If 15
If 13
conversion (bits AD10…AD0) is not valid. As soon as the EOC bit is set the conversion is
completed and the result is valid.
Instead of the polling of the EOC bit one can use a simple delay that should be bigger
than a maximal conversion time (>115 µs, see table 4).
Go to the Step 2 to do the next conversion or to the Step 4 to put ADC to the sleep mode.
•
Use SPI to send ADCC instruction (MOSI):
And check 15th bit of the answer (MISO):
If 15
390109060901
Rev 010
1
5.3.2 Reading the Digital Angular Rate or Temperature (suggested procedure)
Step 1 (put ADC to the active mode if it wasn’t)
Step 2 (conversion start)
Step 3 (polling and result obtaining)
Step 4 (put ADC to the sleep mode if it’s necessary)
0
th
th
th
th
th
0
bit is zero, the instruction is accepted.
bit is zero, the instruction is accepted.
bit is zero, the instruction is accepted.
bit is zero, the instruction is accepted.
bit (EOC) is zero, the conversion is still in progress and the result of the
0
0
0
0
0
x
0
x
x EOC x
x
x
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AD10 AD9 AD8 AD7 AD6 AD5 AD4 AD3 AD2 AD1 AD0 0
x
Angular Rate Sensor (Standard version)
1 0 0 1 x 0 0 0 x x x x x x x x x x x x x x x x
th
x
and 13
x
x
MLX90609
th
bits of the answer:
0 x x x x x x x x x x x x x x x
x
0 x x x x x x x x x x x x x x x
0 x x x x x x x x x x x x x x x
x
x
x
x
x
Data Sheet
November/08
x
x