Rainbow Electronics ADC1061 - Manual (Page 6)

Typical Performance Characteristics
Zero (Offset) Error
vs Reference Voltage
TL H 10559 – 9
Linearity Error vs
Reference Voltage
TL H 10559 – 10
Mode 1 Conversion Time
vs Temperature
TL H 10559 – 11
Mode 2 Conversion Time
vs Temperature
TL H 10559 – 12
Pin Descriptions
Symbol Function
DV
CC
These are the digital and analog positive
AV CC supply voltage inputs They should
(1 6) always be connected to the same
voltage source but are brought out
separately to allow for separate bypass
capacitors Each supply pin should be
bypassed with a 0 1 mF ceramic
capacitor in parallel with a 10 mF
tantalum capacitor
INT (2) This is the active low interrupt output
INT goes low at the end of each
conversion and returns to a high state
following the rising edge of RD
S H (3) This is the Sample Hold control input
When this pin is forced low it causes
the analog input signal to be sampled
and initiates a new conversion
RD (4) This is the active low Read control input
When this pin is low any data present in
the ADC1061’s output registers will be
placed on the data bus In Mode 2 the
Read signal must be low until INT goes
low Until INT goes low the data at the
output pins will be incorrect
Symbol Function
CS (5) This is the active low Chip Select control
input This pin enables the S H and RD
inputs
V REF b
These are the reference voltage inputs
V
REF a
They may be placed at any voltage
(7 9) between GND b 50 mV and V
CC a
50 mV but V REF a
must be greater than
V REF b
An input voltage equal to
V
REF b
produces an output code of 0
and an input voltage equal to V
REF a b
1LSB produces an output code of 1023
V IN (8) This is the analog input pin The
impedance of the source should be less
than 500X for best accuracy and
conversion speed To avoid damage to
the ADC1061 V
IN should not be
allowed to extend beyond the power
supply voltages by more than 300 mV
unless the drive current is limited For
accurate conversions V
IN should not
extend more than 50 mV beyond the
supply voltages
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