Datasheet
Effective Number of Bits (ENOB)
ENOB indicates the global accuracy of an ADC at a
specific input frequency and sampling rate. With an input
range equal to the ADC’s full-scale range, calculate the
ENOB as follows:
SINAD 1.76
ENOB
6.02
−
=
Total Harmonic Distortion (THD)
For the MAX1300/MAX1301, THD is the ratio of the RMS
sum of the input signal’s first four harmonic components
to the fundamental itself. This is expressed as:
2222
2345
1
V V V V
THD 20 log
V
+++
= ×
where V
1
is the fundamental amplitude, and V
2
through V
5
are the amplitudes of the 2nd- through 5th-order harmonic
components.
Spurious-Free Dynamic Range (SFDR)
SFDR is the ratio of RMS amplitude of the fundamental
(maximum signal component) to the RMS value of the
next-largest spectral component.
Figure 21. Aperture Diagram
t
AD
t
AJ
INTCLK
(MODE 2)
ANALOG INPUT
TRACK AND HOLD
TRACK HOLD
SAMPLE INSTANT
SCLK
(MODE 0)
13
14
15
SCLK
(MODE 1)
15
16
10
11
12
MAX1300/MAX1301 8- and 4-Channel, ±3 x V
REF
Multirange Inputs,
Serial 16-Bit ADCs
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│
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