Ordering information (continued), Pin configurations (continued), Chip information – Rainbow Electronics MAX1231 User Manual
Page 21
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
=
+
+
+
(
)
MAX1227/MAX1229/MAX1231
12-Bit 300ksps ADCs with FIFO,
Temp Sensor, Internal Reference
______________________________________________________________________________________
21
Ordering Information (continued)
PART
TEMP RANGE
PIN-PACKAGE
MAX1227BCEE-T
0°C to +70°C
16 QSOP
MAX1227BEEE-T
-40°C to +85°C
16 QSOP
MAX1229ACEP-T*
0°C to +70°C
20 QSOP
MAX1229AEEP-T*
-40°C to +85°C
20 QSOP
MAX1229BCEP-T
0°C to +70°C
20 QSOP
MAX1229BEEP-T
-40°C to +85°C
20 QSOP
MAX1231ACEG-T*
0°C to +70°C
24 QSOP
MAX1231AEEG-T*
-40°C to +85°C
24 QSOP
MAX1231BCEG-T
0°C to +70°C
24 QSOP
MAX1231BEEG-T
-40°C to +85°C
24 QSOP
MAX1231BCGI-T*
0°C to +70°C
28 QFN-EP**
MAX1231BEGI-T*
-40°C to +85°C
28 QFN-EP**
24
23
22
21
20
19
18
17
1
2
3
4
5
6
7
8
EOC
DOUT
DIN
CS
AIN3
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
AIN12
AIN11
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
QFN
Pin Configurations (continued)
*Future product—contact factory for availability.
**EP = Exposed paddle (connect to GND).
Chip Information
TRANSISTOR COUNT: 30,889
PROCESS: BiCMOS