ADC-HZ/883 データシートの表示（PDF） - Murata Power Solutions
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ADC-HZ/883 Datasheet PDF : 6 Pages
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ADC-HX, ADC-HZ Series
12-Bit, 8 and 20μsec Analog-to-Digital Converters
CALIBRATION PROCEDURE
1. Connect the converter for bipolar or unipolar operation.
Use the input connection table for the desired input voltage range and
input impedance. Apply START CONVERT pulses of 100 nanoseconds
minimum duration to pin 21. The spacing of the pulses should be no
less than the maximum conversion time.
2. Zero and Offset Adjustments
Apply a precision voltage reference source between the selected analog
input and ground. Adjust the output of the reference source to the
value shown in the Calibration Table for the unipolar zero adjustment
(zero + 1/2LSB) or the bipolar offset adjustment (–FS + 1/2LSB). Adjust
the trimming potentiometer so that the output code flickers equally
between 1111 1111 1111 and 1111 1111 1110.
3. Full Scale Adjustment
Change the output of the precision voltage reference source to the
value shown in the Calibration Table for the unipolar or bipolar gain
adjustment (+FS – 1.5LSB). Adjust the gain trimming potentiometer
so that the output code flickers equally between 0000 0000 0001 and
0000 0000 0000.
UNIPOLAR RANGE
0 to + 5V
0 to + 10V
BIPOLAR RANGE
± 2.5V
± 5V
± 10V
CALIBRATION TABLE
ADJUST.
ZERO
GAIN
ZERO
GAIN
OFFSET
GAIN
OFFSET
GAIN
OFFSET
GAIN
INPUT VOLTAGE
+ 0.6 mV
+ 4.9982V
+ 1.2 mV
+ 9.9963V
-2.4994V
+ 2.4982V
– 4.9988V
+ 4.9963V
– 9.9976V
+ 9.9927V
TIMING DIAGRAM FOR
ADC-HX, ADC-HZ OUTPUT: 101010101010
START
CONVERT
E.O. C.
(S TA TUS)
CLOCK
OUT
40ns
SERI AL
DATA OU T
BIT 1
(M SB )
BIT 2
BIT 3
BIT 12
(L SB )
100ns mi n.
60ns
40ns
T1
100ns
1
0
1
PARALLEL DATA
NOW VALID
0
50ns
1
1
2
3
4
5
6
7
8
9 10 11 12 13
T2
0
1
BIT 1 BIT 2 BIT 3 BIT 4 BIT 5 BIT 6 BIT 7 BIT 8 BIT 9 BIT 10 BIT 11 BIT 12
(MSB)
(LSB)
0
40ns
1
0
1
0
1
0
1
0
TIMING DIAGRAM OPERATING PERIODS
ADC-HX
ADC-HZ
T1
20μs
8μs
T2
1.56μs
0.56μs
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MDA_ADCHXHZ.B01 Page 5 of 6
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