ADC121S101
SNAS304E – JANUARY 2006 – REVISED OCTOBER 2012
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ADC121S101 Converter Electrical Characteristics
(1) (2)
The following specifications apply for VA = +2.7V to 5.25V, GND = 0V, fSCLK = 10 MHz to 20 MHz, CL = 15 pF, fSAMPLE = 500
ksps to 1 Msps, unless otherwise noted. Boldface limits apply for TA = -40°C to +125°C: all other limits TA = 25°C unless
otherwise noted.
Symbol
Parameter
Conditions
Typical
Limits(2)
Units
STATIC CONVERTER CHARACTERISTICS
Resolution with No Missing
VA = +2.7v to +3.6V −40°C ≤ TA ≤ 125°C
12
Bits
Codes
+0.4
LSB (max)
SOT-23
±1.0
-0.4
LSB (min)
−40°C ≤ TA ≤ +85°C, VA = +2.7V to
+3.6V
+0.4
+1.0
LSB (max)
WSON
-0.4
-1.2
LSB (min)
INL
Integral Non-Linearity
+1.0
LSB (max)
SOT-23
-1.1
LSB (min)
TA = 125°C, VA = +2.7v to +3.6V
+1.0
LSB (max)
WSON
-1.3
LSB (min)
+0.5
+1.0
LSB (max)
−40°C ≤ TA ≤ +85°C, VA = +2.7V to +3.6V
DNL
Differential Non-Linearity
−0.3
-0.9
LSB (min)
TA = 125°C, VA = +2.7v to +3.6V
±1.0
LSB (max)
LSB (max)
VOFF
Offset Error
−40°C ≤ TA ≤ 125°C, VA = +2.7v to +3.6V
±0.1
±1.2
LSB (min)
SOT-23
±0.20
±1.2
LSB (max)
GE
Gain Error
−40°C ≤ TA ≤ 125°C, VA = +2.7 to +3.6V
WSON
±0.20
±1.5
LSB (max)
DYNAMIC CONVERTER CHARACTERISTICS
Signal-to-Noise Plus
VA = +2.7 to 5.25V, −40°C ≤ TA ≤ 125°C
SINAD
72
70
dB (min)
Distortion Ratio
fIN = 100 kHz, −0.02 dBFS
VA = +2.7 to 5.25V, −40°C ≤ TA ≤ +85°C
72.5
70.8
fIN = 100 kHz, −0.02 dBFS
SNR
Signal-to-Noise Ratio
dB (min)
VA = +2.7 to 5.25V, TA = +125°C
70.6
fIN = 100 kHz, −0.02 dBFS
THD
Total Harmonic Distortion
VA = +2.7 to 5.25V, fIN = 100 kHz, −0.02 dBFS
−80
dB (max)
Spurious-Free Dynamic
SFDR
VA = +2.7 to 5.25V, fIN = 100 kHz, −0.02 dBFS
82
dB (min)
Range
ENOB
Effective Number of Bits
VA = +2.7 to 5.25V, fIN = 100 kHz, −0.02 dBFS
11.6
11.3
Bits (min)
Intermodulation Distortion,
VA = +5.25V, fa = 103.5 kHz, fb = 113.5 kHz
−78
dB
Second Order Terms
IMD
Intermodulation Distortion,
VA = +5.25V, fa = 103.5 kHz, fb = 113.5 kHz
−78
dB
Third Order Terms
VA = +5V
11
MHz
FPBW
-3 dB Full Power Bandwidth
VA = +3V
8
MHz
ANALOG INPUT CHARACTERISTICS
VIN
Input Range
0 to VA
V
IDCL
DC Leakage Current
±1
µA (max)
Track Mode
30
pF
CINA
Input Capacitance
Hold Mode
4
pF
(1)
Tested limits are guaranteed to National's AOQL (Average Outgoing Quality Level).
(2)
Data sheet min/max specification limits are guaranteed by design, test, or statistical analysis.
4
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