Datasheet

Signal-to-Noise Plus Distortion (SINAD)
SINAD is computed by taking the ratio of the RMS sig-
nal to all spectral components minus the fundamental
and the DC offset.
Total Harmonic Distortion (THD)
THD is typically the ratio of the RMS sum of the first four
harmonics of the input signal to the fundamental itself.
This is expressed as:
where V
1
is the fundamental amplitude, and V
2
through
V
5
are the amplitudes of the 2nd- through 5th-order
harmonics.
Spurious-Free Dynamic Range (SFDR)
SFDR is the ratio expressed in decibels of the RMS
amplitude of the fundamental (maximum signal compo-
nent) to the RMS value of the next largest spurious
component, excluding DC offset.
Intermodulation Distortion (IMD)
The two-tone IMD is the ratio expressed in decibels of
either input tone to the worst 3rd-order (or higher) inter-
modulation products. The individual input tone levels
are backed off by 6.5dB from full scale.
THD
VVVV
V
=×
+++
⎛
⎝
⎞
⎠
⎛
⎝
⎜
⎜
⎜
⎜
⎞
⎠
⎟
⎟
⎟
⎟
20
10
2
2
3
2
4
2
5
2
1
log
MAX1183
Dual 10-Bit, 40Msps, 3V, Low-Power ADC with
Internal Reference and Parallel Outputs
______________________________________________________________________________________ 17
GND
REFERENCE
OUTPUT
DRIVERS
CONTROL
T/H
T/H
PIPELINE
ADC
DEC
OUTPUT
DRIVERS
REFOUT
REFN
COM
REFP
REFIN
INA+
INA-
CLK
INB+
INB-
V
DD
DEC
PIPELINE
ADC
OGND
OV
DD
D9A–D0A
OE
D9B–D0B
T/B
PD
SLEEP
MAX1183

10

10

10
10
Functional Diagram
PART
RESOLUTION
(BITS)
SPEED
GRADE
(Msps)
OUTPUT
BUS
MAX1190 10 120 Full-Duplex
MAX1180 10 105 Full-Duplex
MAX1181 10 80 Full-Duplex
MAX1182 10 65 Full-Duplex
MAX1183 10 40 Full-Duplex
MAX1186 10 40 Half-Duplex
MAX1184 10 20 Full-Duplex
MAX1185 10 20 Half-Duplex
MAX1198 8 100 Full-Duplex
MAX1197 8 60 Full-Duplex
MAX1196 8 40 Half-Duplex
MAX1195 8 40 Full-Duplex
Table 2. Pin-Compatible Versions