MAX1182 Maxim Integrated Products, MAX1182 Datasheet - Page 19

• Manufacturer Part Number: MAX1182
• Description: Low-Power ADC
• Manufacturer: Maxim Integrated Products

Figure 8. Typical QAM Application, Using the MAX1182
Figure 9. T/H Aperture Timing
Dual 10-Bit, 65Msps, 3V, Low-Power ADC with
DATA (T/H)
SAMPLED
ANALOG
INPUT
CLK
T/H
t
AD
TRACK
______________________________________________________________________________________
Internal Reference and Parallel Outputs
t
HOLD
AJ
DOWNCONVERTER
TRACK
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
V
harmonics.
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.
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.
MAX2451
5
are the amplitudes of the 2nd- through 5th-order
THD
Spurious-Free Dynamic Range (SFDR)
÷ 8
1
is the fundamental amplitude, and V
=
0°
20
90°
Intermodulation Distortion (IMD)
Total Harmonic Distortion (THD)
×
log
10




V
2
INA+
INA-
INB+
INB-
2
+
MAX1182
V
3
2
V
1
+
V
4
2
+
V
5
PROCESSING
2
2
POST
through
DSP




19