Datasheet
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.
Chip Information
PROCESS: BiCMOS
log /THD x V V V V V=+++
⎛
⎝
⎞
⎠
⎡
⎣
⎢
⎢
⎤
⎦
⎥
⎥
20
2
2
3
2
4
2
5
2
1
MAX1227/MAX1229/MAX1231
12-Bit 300ksps ADCs with FIFO,
Temp Sensor, Internal Reference
______________________________________________________________________________________ 21
Ordering Information (continued)
24
23
22
21
20
19
18
17
1
2
3
4
5
6
7
8
EOC
DOUT
DIN
CSAIN3
AIN2
AIN1
AIN0
TOP VIEW
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
MAX1231
28
27
26
25
24
23
22
8
9
10
11
12
13
14
AIN9 AIN2
AIN1
AIN0
N.C.
EOC
DOUT
DIN
AIN10
AIN11
AIN12
AIN13
REF-/AIN14
CNVST/AIN15
15
16
17
18
19
20
21
REF+
GND
N.C.
V
DD
N.C.
SCLK
CS
7
6
5
4
3
2
1
AIN8
AIN7
AIN6
AIN5
AIN4
AIN3
N.C.
MAX1231
TQFN
+
+
Pin Configurations (continued)
*EP = Exposed pad. (Connect to GND.)
+
Denotes a lead(Pb)-free/RoHS-compliant package.
PART TEMP RANGE PIN-PACKAGE
MAX1231BCEG+ 0°C to +70°C 24 QSOP
MAX1231BEEG+ -40°C to +85°C 24 QSOP
MAX1231BCTI+ 0°C to +70°C 28 TQFN-EP*
MAX1231BETI+ -40°C to +85°C 28 TQFN-EP*
Package Information
For the latest package outline information and land patterns
(footprints), go to www.maxim-ic.com/packages
. Note that a
“+”, “#”, or “-” in the package code indicates RoHS status only.
Package drawings may show a different suffix character, but
the drawing pertains to the package regardless of RoHS status.
PACKAGE
TYPE
PACKAGE
CODE
OUTLINE
NO.
LAND
PATTERN NO.
16 QSOP E16+1 21-0055 90-0167
20 QSOP E20+1 21-0055 90-0168
24 QSOP E24+1 21-0055 90-0172
28 TQFN-EP T2855+6 21-0140 90-0026