Datasheet
ADC081S021
www.ti.com
SNAS308E –APRIL 2005–REVISED MARCH 2013
ADC081S021 Converter Electrical Characteristics
(1)(2)
(continued)
The following specifications apply for V
A
= +2.7V to 5.25V, f
SCLK
= 1 MHz to 4 MHz, f
SAMPLE
= 50 ksps to 200 ksps, C
L
= 15
pF, unless otherwise noted. Boldface limits apply for T
A
= T
MIN
to T
MAX
: all other limits T
A
= 25°C.
Symbol Parameter Conditions Typical Limits
(2)
Units
DIGITAL OUTPUT CHARACTERISTICS
I
SOURCE
= 200 µA V
A
− 0.07 V
A
− 0.2 V (min)
V
OH
Output High Voltage
I
SOURCE
= 1 mA V
A
− 0.1 V
I
SINK
= 200 µA 0.03 0.4 V (max)
V
OL
Output Low Voltage
I
SINK
= 1 mA 0.1 V
I
OZH
, I
OZL
TRI-STATE Leakage Current ±0.1 ±10 µA (max)
C
OUT
TRI-STATE Output Capacitance 2 4 pF (max)
Output Coding Straight (Natural) Binary
POWER SUPPLY CHARACTERISTICS
2.7 V (min)
V
A
Supply Voltage
5.25 V (max)
V
A
= +5.25V,
1.47 2.2 mA (max)
f
SAMPLE
= 200 ksps
Supply Current, Normal Mode
(Operational, CS low)
V
A
= +3.6V,
0.36 0.9 mA (max)
f
SAMPLE
= 200 ksps
I
A
f
SCLK
= 0 MHz, V
A
= +5.25V
500 nA
f
SAMPLE
= 0 ksps
Supply Current, Shutdown (CS high)
V
A
= +5.25V, f
SCLK
= 4 MHz,
60 µA
f
SAMPLE
= 0 ksps
V
A
= +5.25V 7.7 11.6 mW (max)
Power Consumption, Normal Mode
(Operational, CS low)
V
A
= +3.6V 1.3 3.24 mW (max)
f
SCLK
= 0 MHz, V
A
= +5.25V
P
D
2.6 µW
f
SAMPLE
= 0 ksps
Power Consumption, Shutdown (CS
high)
f
SCLK
= 4 MHz, V
A
= +5.25V,
315 µW
f
SAMPLE
= 0 ksps
AC ELECTRICAL CHARACTERISTICS
1.0 MHz (min)
f
SCLK
Clock Frequency See
(3)
4.0 MHz (max)
50 ksps (min)
f
S
Sample Rate See
(3)
200 ksps (max)
SCLK Falling
t
HOLD
Hold Time 13
Edges
40 % (min)
DC SCLK Duty Cycle f
SCLK
= 4 MHz 50
60 % (max)
t
ACQ
Minimum Timre Required for Acquisition 350 ns (max)
t
QUIET
See
(4)
50 ns (min)
t
AD
Aperture Delay 3 ns
t
AJ
Aperture Jitter 30 ps
(3) This is the frequency range over which the electrical performance is ensured. The device is functional over a wider range which is
specified under Operating Ratings.
(4) Minimum Quiet Time required by bus relinquish and the start of the next conversion.
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