ADC-HX12BMM Murata Power Solutions Inc, ADC-HX12BMM Datasheet - Page 5

• Manufacturer Part Number: ADC-HX12BMM
• Description: Analog To Digital Converter
• Manufacturer: Murata Power Solutions Inc

CALIBRATION PROCEDURE
1. Connect the converter for bipolar or unipolar operation.
2. Zero and Offset Adjustments
3. Full Scale Adjustment
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.
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.
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.
DATA OU T
CONVERT
(S TA TUS)
SERI AL
CLOCK
START
E.O. C.
BIT 12
(M SB )
(L SB )
BIT 1
BIT 2
BIT 3
OUT
40ns
www.murata-ps.com
1
100ns mi n.
40ns
(MSB)
2
BIT 1
60ns
ADC-HX, ADC-HZ OUTPUT: 101010101010
3
BIT 2
40ns
TIMING DIAGRAM FOR
4
BIT 3
T2
5
100ns
BIT 4
6
BIT 5
T1
7
12-Bit, 8 and 20μsec Analog-to-Digital Converters
BIT 6
UNIPOLAR RANGE
BIPOLAR RANGE
0 to + 10V
0 to + 5V
8
± 2.5V
BIT 7
± 10V
± 5V
TIMING DIAGRAM OPERATING PERIODS
9
ADC-HX, ADC-HZ Series
BIT 8
T1
T2
Technical enquiries email: [e-mail], tel:
10
BIT 9 BIT 10 BIT 11
11
CALIBRATION TABLE
ADC-HX
1.56μs
20μs
12
OFFSET
OFFSET
OFFSET
ADJUST.
ZERO
ZERO
GAIN
GAIN
GAIN
GAIN
GAIN
13
PARALLEL DATA
NOW VALID
BIT 12
(LSB)
ADC-HZ
0.56μs
8μs
50ns
MDA_ADCHXHZ.B01 Page 5 of 6
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
INPUT VOLTAGE
+ 4.9982V
+ 9.9963V
+ 2.4982V
– 4.9988V
+ 4.9963V
– 9.9976V
+ 9.9927V
+ 0.6 mV
+ 1.2 mV
-2.4994V
[phone]