ICL8052ACDD INTERSIL [Intersil Corporation], ICL8052ACDD Datasheet - Page 21

• Manufacturer Part Number: ICL8052ACDD
• Description: 14-Bit/16-Bit, Microprocessor- Compatible, 2-Chip, A/D Converter
• Manufacturer: INTERSIL [Intersil Corporation]

ICL7104 with ICL8052/8068 Integrating A/D Converter Equations
• Oscillator
• Oscillator Period
• Integration Clock Frequency
• Integration Period
• 60/50Hz Rejection Criterion
• Optimum Integration Current
• Full Scale Analog Input Voltage
• Integrate Resistor
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notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate
and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which
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CRYSTAL or RC (RC on -14 Part Only)
f
f
C
t
f
t
t
t
I
V
OSC
OSC
OSC
CLOCK
INT
INT
INT
INT
R
INFS
OSC
INT
/t
= 8192 x t
= 32768 x t
= 20 A
60Hz
(Typ) 200kHz
= 0.45/RC (ICL7104-14 Only)
= 1/f
=
> 50pF and R
(Typ) = 200mV to 2V = 2V
= f
------------------------------------------------------------ -
Buffe rGain
OSC
or t
OSC
INT
OSC
OSC
I
/t
ICL7104 - 14
ICL7104 - 16
INT
50Hz
(7104-14)
OSC
(7104-16)
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V
= Integer
INFS
> 50K
98,304 - 32,769
REF
24,576 - 8,193
AUTOZERO
ICL8052/ICL7104, ICL8068/ICL7104
(COUNT)
CONVERSION TIME (IN CONTINUOUS MODE):
(FIXED COUNT)
131,072
32,768
INTEGRATE
32768
FIGURE 17.
8192
†
†
5-26
t
t
OSC
OSC
• Integrate Capacitor
• Integrator Output Voltage
• Output Count
• Output Type:
• Power Supply: 15V, +5V
• Auto Zero Capacitor Values
• Reference Capacitor Value
(7104 - 14)
(7104 - 16)
V
Binary Amplitude with Polarity and Overrange Bits.
V++ = +15V
V- = -15V
V+ = +5V
V
If V
0.01 F < C
C
C
V
Count
Count
INT
REF
REF
INT
INT
REF
(Typ) = 9V
DEINTEGRATE
=
=
= (Buffer Gain) x C
=
=
1.75V
not used, float output pin.
------------------------------- -
(COUNT)
0 - 16383
0 - 65535
------------------------------- -
t
t
INT
8192
32768
INT
AZ
C
V
INT
INT
< 1 F
I
I
INT
INT
-------------- - (7104-14)
V
V
-------------- - (7104-16)
V
REF
V
IN
REF
IN
AZ