Datasheet

ADC128S022
www.ti.com SNAS334E –AUGUST 2005–REVISED MARCH 2013
ADC128S022 Converter Electrical Characteristics
(1)
(continued)
The following specifications apply for AGND = DGND = 0V, f
SCLK
= 0.8 MHz to 3.2 MHz, f
SAMPLE
= 50 ksps to 200 ksps, C
L
=
50pF, 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
V
A
= V
D
= +3.0V,
−97 dB
f
a
= 19.5 kHz, f
b
= 20.5 kHz
Intermodulation Distortion, Second
Order Terms
V
A
= V
D
= +5.0V,
−94 dB
f
a
= 19.5 kHz, f
b
= 20.5 kHz
IMD
V
A
= V
D
= +3.0V,
−88 dB
f
a
= 19.5 kHz, f
b
= 20.5 kHz
Intermodulation Distortion, Third Order
Terms
V
A
= V
D
= +5.0V,
−88 dB
f
a
= 19.5 kHz, f
b
= 20.5 kHz
ANALOG INPUT CHARACTERISTICS
V
IN
Input Range 0 to V
A
V
I
DCL
DC Leakage Current ±1 µA (max)
Track Mode 33 pF
C
INA
Input Capacitance
Hold Mode 3 pF
DIGITAL INPUT CHARACTERISTICS
V
A
= V
D
= +2.7V to +3.6V 2.1 V (min)
V
IH
Input High Voltage
V
A
= V
D
= +4.75V to +5.25V 2.4 V (min)
V
IL
Input Low Voltage V
A
= V
D
= +2.7V to +5.25V 0.8 V (max)
I
IN
Input Current V
IN
= 0V or V
D
±0.01 ±1 µA (max)
C
IND
Digital Input Capacitance 2 4 pF (max)
DIGITAL OUTPUT CHARACTERISTICS
I
SOURCE
= 200 µA,
V
OH
Output High Voltage V
D
− 0.5 V (min)
V
A
= V
D
= +2.7V to +5.25V
I
SINK
= 200 µA to 1.0 mA,
V
OL
Output Low Voltage 0.4 V (max)
V
A
= V
D
= +2.7V to +5.25V
I
OZH
, I
OZL
Hi-Impedance Output Leakage Current V
A
= V
D
= +2.7V to +5.25V ±1 µA (max)
C
OUT
Hi-Impedance Output Capacitance
(3)
2 4 pF (max)
Output Coding Straight (Natural) Binary
POWER SUPPLY CHARACTERISTICS (C
L
= 10 pF)
2.7 V (min)
V
A
, V
D
Analog and Digital Supply Voltages V
A
≥ V
D
5.25 V (max)
V
A
= V
D
= +2.7V to +3.6V,
0.41 1.1 mA (max)
f
SAMPLE
= 200 ksps, f
IN
= 39.9 kHz
Total Supply Current
Normal Mode ( CS low)
V
A
= V
D
= +4.75V to +5.25V,
1.50 2.3 mA (max)
f
SAMPLE
= 200 ksps, f
IN
= 39.9 kHz
I
A
+ I
D
V
A
= V
D
= +2.7V to +3.6V,
20 nA
f
SCLK
= 0 ksps
Total Supply Current
Shutdown Mode (CS high)
V
A
= V
D
= +4.75V to +5.25V, f
SCLK
= 0
50 nA
ksps
V
A
= V
D
= +3.0V, f
SAMPLE
= 200 ksps, f
IN
1.2 3.3 mW (max)
= 39.9 kHz
Power Consumption
Normal Mode ( CS low)
V
A
= V
D
= +5.0V, f
SAMPLE
= 200 ksps, f
IN
7.5 11.5 mW (max)
P
C
= 39.9 kHz
V
A
= V
D
= +3.0V, f
SCLK
= 0 ksps 0.06 µW
Power Consumption
Shutdown Mode (CS high)
V
A
= V
D
= +5.0V, f
SCLK
= 0 ksps 0.25 µW
(3) Data sheet min/max specification limits are specified by design, test, or statistical analysis.
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