ADC122S021 Datasheet, PDF (3/19 Pages) National Semiconductor (TI) – 2 Channel, 200 KSPS 12-Bit A/D Converter

Absolute Maximum Ratings (Notes 1, 2)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Analog Supply Voltage V_A
Voltage on Any Pin to GND
Input Current at Any Pin (Note 3)
Package Input Current (Note 3)
Power Consumption at T_A = 25˚C
ESD Susceptibility (Note 5)
Human Body Model
Machine Model
Junction Temperature
Storage Temperature
−0.3V to 6.5V
−0.3V to V_A +0.3V
±10 mA
±20 mA
See (Note 4)
2500V
250V
+150˚C
−65˚C to +150˚C
Operating Ratings (Notes 1, 2)
Operating Temperature Range
V_A Supply Voltage
Digital Input Pins Voltage Range
Clock Frequency
Analog Input Voltage
−40˚C ≤ T_A ≤ +85˚C
+2.7V to +5.25V
−0.3V to V_A
0.8 MHz to 3.2 MHz
0V to V_A
Package Thermal Resistance
Package
8-lead MSOP
θ_JA
250˚C / W
Soldering process must comply with National Semiconduc-
tor’s Reflow Temperature Profile specifications. Refer to
www.national.com/packaging. (Note 6)
ADC122S021 Converter Electrical Characteristics (Note 9)
The following specifications apply for V_A = +2.7V to 5.25V, GND = 0V, f_SCLK = 0.8 MHz to 3.2 MHz, f_SAMPLE = 50 kSPS to 200
kSPS, C_L = 35 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
(Note 7)
Units
STATIC CONVERTER CHARACTERISTICS
Resolution with No Missing Codes
12
Bits
INL
Integral Non-Linearity
±0.35
+0.8
−1.1
LSB (max)
LSB (min)
DNL
Differential Non-Linearity
+0.4
−0.2
+1.1
−0.8
LSB (max)
LSB (min)
V_OFF
OEM
Offset Error
Channel to Channel Offset Error
Match
+0.37
±0.1
±1.3
±1.0
LSB (max)
LSB (max)
FSE
Full Scale Error
±0.52
±1.5
LSB (max)
FSEM
Channel to Channel Full-Scale Error
Match
+0.1
±1.0
LSB (max)
DYNAMIC CONVERTER CHARACTERISTICS
SINAD
SNR
THD
SFDR
ENOB
IMD
FPBW
Signal-to-Noise Plus Distortion Ratio
Signal-to-Noise Ratio
Total Harmonic Distortion
Spurious-Free Dynamic Range
Effective Number of Bits
Channel-to-Channel Crosstalk
Intermodulation Distortion, Second
Order Terms
Intermodulation Distortion, Third
Order Terms
-3 dB Full Power Bandwidth
V_A = +2.7 to 5.25V,
f_IN = 39.9 kHz, −0.02 dBFS
V_A = +2.7 to 5.25V,
f_IN = 39.9 kHz, −0.02 dBFS
V_A = +2.7 to 5.25V,
f_IN = 39.9 kHz, −0.02 dBFS
V_A = +2.7 to 5.25V,
f_IN = 39.9 kHz, −0.02 dBFS
V_A = +2.7 to 5.25V,
V_A = +5.25V
f_IN = 39.9 kHz
V_A = +5.25V,
f_a = 40.161 kHz, f_b = 41.015 kHz
V_A = +5.25V,
f_a = 40.161 kHz, f_b = 41.015 kHz
V_A = +5V
V_A = +3V
72
69.2
dB (min)
72
70.6
dB (min)
−84
−75
dB (max)
86
76
dB (min)
11.7
11.2
Bits (min)
−86
dB
−81
dB
−88
dB
11
MHz
8
MHz
3
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