Digital Specifications
(AVDD = +5V, DRVDD = +5V, unless otherwise noted)
Parameter
Symbol
Min
Typ
Max
Units
Logic Inputs (CLK, OE)
High Level Input Voltage (DRVDD = +5V)
High Level Input Voltage (DRVDD =+3.3V)
Low Level Input Voltage (DRVDD = +5V)
Low Level Input Voltage (DRVDD = +3.3V)
High Level Input Current (DRVDD=5V, VIN=5V)
Low Level Input Current (DRVDD=5V, VIN=0V)
High Level Input Current (DRVDD=3.3V, VIN=3.3V)
Low Level Input Current (DRVDD=3.3V, VIN=0V)
Input Capacitance (1)
VIH_50
VIH_33
VIL_50
VIL_33
IIH_50
IIL_50
IIH_33
IIL_33
CIN
3.5
2.3
V
V
1.0
1.0
10
10
10
10
V
V
-10
-10
-10
-10
µA
µA
µA
µA
pF
5
Logic Outputs (D1-D12 with DRVDD = +5V)
High Level Output Voltage(IOH = -50µA)
High Level Output Voltage(IOH = -0.5mA)
Low Level Output Voltage(IOL = 1.6mA)
Low Level Output Voltage(IOL = 50µA)
VOH1_50
VOH2_50
VOL2_50
VOL1_50
IOZH_50
IOZL_50
4.5
2.4
V
V
0.4
0.1
10
V
V
High Z Output Current (DRVDD=5V, OE=0V, VOUT=5V)
High Z Output Current (DRVDD=5V, OE=0v, VOUT=0V)
Logic Outputs (D1-D12 with DRVDD = +3.3V)
High Level Output Voltage(IOH = -50µA)
High Level Output Voltage(IOH = -0.5mA)
Low Level Output Voltage(IOL = 50µA)
-10
-10
µA
µA
10
VOH1_33
VOH2_33
VOL1_33
VOL2_33
IOZH_33
IOZL_33
COUT
2.95
2.80
V
V
0.05
0.4
10
V
Low Level Output Voltage(IOL = 1.6mA)
High Z Output Current (DRVDD=3.3V, VOE=0V, VOUT=3.3V)
High Z Output Current (DRVDD=3.3V, VOE=0V, VOUT=0V)
Output Capacitance (1)
V
-10
-10
µA
µA
pF
10
5
(1) Guaranteed but not tested.
Gain Error
Definitions of Specifications
The first code transition should occur at an analog value 1/2 LSB
above negative full scale. The last transition should occur at an analog
value 1 1/2 LSB below the nominal full scale.
Integral Nonlinearity (INL)
INL refers to the deviation of each individual code from a line drawn
from “negative full scale” through “positive full scale.” The point used
as “negative full scale” occurs 1/2 LSB before the first code transition.
“Positive full scale” is defined as a level 1 1/2 LSB beyond the last
code transition. The deviation is measured from the middle of each
particular code to the true straight line.
Gain error is the deviation of the actual difference between first and
last code transitions and the ideal difference between first and last
code transitions.
Temperature Drift
The temperature drift for zero error and gain error specifies the maximum
change from the initial (+25°C) value to the value at -55°C or +125°C.
Differential Nonlinearity (DNL, No Missing Codes)
An ideal ADC exhibits code transitions that are exactly 1 LSB apart.
DNL is the deviation from this ideal value. Guaranteed no missing
codes to 12-bit resolution indicate that all 4096 codes, respectively,
must be present over all operating ranges.
Aperture Jitter
Aperture jitter is the variation in aperture delay for successive samples
and is manifested as noise on the input to the A/D.
Aperture Delay
Zero Error
Aperture delay is a measure of the sample-and-hold amplifier (SHA)
performance and is measured from the rising edge of the clock input
to when the input signal is held for conversion.
The major carry transition should occur for an analog value 1/2 LSB
below VINA = VINB. Zero error is defined as the deviation of the
actual transition from that point.