MAX1420 Datasheet, PDF (16/17 Pages) Maxim Integrated Products – 12-Bit, 60Msps, +3.3V, Low-Power ADC with Internal Reference

12-Bit, 60Msps, +3.3V, Low-Power ADC
with Internal Reference
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:


THDdB = 20 × log10 



V2²
+
V3²
+
V4 ²
+
V5²





V₁

where V₁ is the fundamental amplitude, and V₂ through
V₅ 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 at -6.5dB full scale and their envelope is at -0.5dB
full scale.
CLK
CLK
INP
T/H
INN
PD
BANDGAP
REFERENCE
Functional Diagram
INTERFACE
PIPELINE ADC
REF SYSTEM +
BIAS
MAX1420
AV_DD
AGND
OUTPUT
DRIVERS
D11–D0
DV_DD
DGND
REFIN REFP CML REFN
OE
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