MAX1069 Datasheet, PDF (19/20 Pages) Maxim Integrated Products – 58.6ksps, 14-Bit, 2-Wire Serial ADC

58.6ksps, 14-Bit, 2-Wire Serial ADC
in a 14-Pin TSSOP
Signal-to-Noise Plus Distortion
Signal-to-noise plus distortion (SINAD) is the ratio of the
fundamental input frequency’s RMS amplitude to RMS
equivalent of all other ADC output signals.
SINAD(db)
=
20
×

log_
Signal_RMS
Noise_RMS


Effective Number of Bits
Effective number of bits (ENOB) indicates the global
accuracy of an ADC at a specific input frequency and
sampling rate. An ideal ADC’s error consists of quanti-
zation noise only. With an input range equal to the
ADC’s full-scale range, calculate the ENOB as follows:
ENOB
=


SINAD - 1.76
6.02


Total Harmonic Distortion
Total harmonic distortion (THD) is the RMS sum ratio of
the input signal’s first five harmonics to the fundamental
itself, expressed as:

THD
=
20
×
log



V₂₂
+
V₃₂
+
V₄₂
+
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
Spurious-free dynamic range (SFDR) is the ratio of RMS
amplitude of the fundamental (maximum signal compo-
nent) to the RMS value of the next-largest distortion
component.
Chip Information
TRANSISTOR COUNT: 18,269
PROCESS: BiCMOS
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