Typical performance characteristics – Rainbow Electronics ADC0848 User Manual
Page 4
Note 9
For V
IN
(
b
)
t
V
IN
(
a
) the digital output code will be 0000 0000 Two on-chip diodes are tied to each analog input which will forward-conduct for analog
input voltages one diode drop below ground or one diode drop greater than V
CC
supply Be careful during testing at low V
CC
levels (4 5V) as high level analog
inputs (5V) can cause this input diode to conduct especially at elevated temperatures and cause errors for analog inputs near full-scale The spec allows 50 mV
forward bias of either diode This means that as long as the analog V
IN
does not exceed the supply voltage by more than 50 mV the output code will be correct To
achieve an absolute 0 V
DC
to 5 V
DC
input voltage range will therefore require a minimum supply voltage of 4 950 V
DC
over temperature variations initial tolerance
and loading
Note 10
Off channel leakage current is measured after the channel selection
Note 11
The temperature coefficient is 0 3% C
Typical Performance Characteristics
Logic Input Threshold
Voltage vs Supply Voltage
Output Current vs
Temperature
Power Supply Current vs
Temperature
Linearity Error vs V
REF
Conversion Time vs V
SUPPLY
Conversion Time vs
Temperature
Unadjusted Offset Error vs
V
REF
Voltage
TL H 5016 – 3
4