Datasheet

ADC108S022
SNAS338F –SEPTEMBER 2005–REVISED MARCH 2013 www.ti.com
ADC108S022 Converter Electrical Characteristics
(1)
The following specifications apply for V
A
= V
D
= +2.7V to +5.25V, AGND = DGND = 0V, f
SCLK
= 0.8 MHz to 3.2 MHz, f
SAMPLE
=
50 ksps to 200 ksps, and C
L
= 50pF, unless otherwise noted. Boldface limits apply for T
A
= T
MIN
to T
MAX
: all other limits T
A
= 25°C.
Limits
Symbol Parameter Conditions Typical Units
(2)
STATIC CONVERTER CHARACTERISTICS
Resolution with No Missing Codes 10 Bits
Integral Non-Linearity (End Point
INL ±0.1 ±0.3 LSB (max)
Method)
DNL Differential Non-Linearity ±0.1 ±0.3 LSB (max)
V
OFF
Offset Error +0.3 ±0.7 LSB (max)
OEM Offset Error Match ±0.05 ±0.2 LSB (max)
FSE Full Scale Error +0.1 ±0.4 LSB (max)
FSEM Full Scale Error Match ±0.05 ±0.2 LSB (max)
DYNAMIC CONVERTER CHARACTERISTICS
FPBW Full Power Bandwidth (−3dB) 8 MHz
SINAD Signal-to-Noise Plus Distortion Ratio f
IN
= 40.2 kHz, −0.02 dBFS 61.8 61.3 dB (min)
SNR Signal-to-Noise Ratio f
IN
= 40.2 kHz, −0.02 dBFS 61.9 61.4 dB (min)
THD Total Harmonic Distortion f
IN
= 40.2 kHz, −0.02 dBFS −86.5 −73.4 dB (max)
SFDR Spurious-Free Dynamic Range f
IN
= 40.2 kHz, −0.02 dBFS 83.2 76.6 dB (min)
ENOB Effective Number of Bits f
IN
= 40.2 kHz 9.98 9.89 Bits (min)
ISO Channel-to-Channel Isolation f
IN
= 20 kHz 79.8 dB
Intermodulation Distortion, Second
f
a
= 19.5 kHz, f
b
= 20.5 kHz −86.0 dB
Order Terms
IMD
Intermodulation Distortion, Third Order
f
a
= 19.5 kHz, f
b
= 20.5 kHz −82.5 dB
Terms
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 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
V
OH
Output High Voltage I
SOURCE
= 200 µA, V
D
− 0.5 V (min)
V
OL
Output Low Voltage I
SINK
= 200 µA to 1.0 mA, 0.4 V (max)
I
OZH
, I
OZL
Hi-Impedance Output Leakage Current ±1 µA (max)
C
OUT
Hi-Impedance Output Capacitance
(1)
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)
(1) Data sheet min/max specification limits are ensured by design, test, or statistical analysis.
(2) Tested limits are specified to AOQL (Average Outgoing Quality Level).
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