Datasheet
MAX1226/MAX1228/MAX1230
12-Bit 300ksps ADCs with FIFO,
Temp Sensor, Internal Reference
______________________________________________________________________________________ 21
Pin Configurations (continued)
24
23
22
21
20
19
18
17
1
2
3
4
5
6
7
8
EOC
DOUT
DIN
CSAIN3
AIN2
AIN1
AIN0
SCLK
V
DD
GND
REF+AIN7
AIN6
AIN5
AIN4
16
15
14
13
9
10
11
12
CNVST/AIN15
REF-/AIN14
AIN13
AIN12AIN11
AIN10
AIN9
AIN8
QSOP
MAX1230
+
28
27
26
25
24
23
22
8
9
10
11
12
13
14
15
16
17
18
19
20
21
7
6
5
4
3
2
1
+
MAX1230
TQFN
AIN3
N.C.
AIN4
AIN5
AIN6
AIN7
AIN8
AIN2
AIN1
AIN0
N.C.
EOC
DOUT
DIN
CS
SCLK
N.C.
V
DD
N.C.
GND
REF+
EP
CNVST/AIN5
REF-/AIN4
AIN3
AIN2
AIN1
AIN0
AIN9
TOP VIEW
Total Harmonic Distortion
Total harmonic distortion (THD) is the ratio of the RMS
sum of the first five harmonics of the input signal to the
fundamental itself. This is expressed as:
where V1 is the fundamental amplitude, and V2–V5 are
the amplitudes of the first five harmonics.
Spurious-Free Dynamic Range
Spurious-free dynamic range (SFDR) is the ratio of the
RMS amplitude of the fundamental (maximum signal
component) to the RMS value of the next-largest distor-
tion component.
THD 20 x log V V V V / V
2
2
3
2
4
2
5
2
1
= +++
()
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