MAX1158BCUP+T Maxim Integrated, MAX1158BCUP+T Datasheet - Page 13
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MAX1158BCUP+T
Manufacturer Part Number
MAX1158BCUP+T
Description
Analog to Digital Converters - ADC 14-Bit 135ksps 4.2V Precision ADC
Manufacturer
Maxim Integrated
Datasheet
1.MAX1174AEUP.pdf
(15 pages)
Specifications of MAX1158BCUP+T
Rohs
yes
Number Of Channels
1
Architecture
SAR
Conversion Rate
135 KSPs
Resolution
14 bit
Input Type
Single-Ended
Snr
85 dB
Interface Type
Parallel
Operating Supply Voltage
5 V
Maximum Operating Temperature
+ 70 C
Package / Case
TSSOP-20
Maximum Power Dissipation
879 mW
Minimum Operating Temperature
0 C
Number Of Converters
1
Voltage Reference
Internal, External
For a waveform perfectly reconstructed from digital
samples, signal-to-noise ratio (SNR) is the ratio of the
full-scale analog input (RMS value) to the RMS quanti-
zation error (residual error). The ideal, theoretical mini-
mum analog-to-digital noise is caused by quantization
noise error only and results directly from the ADC’s res-
olution (N bits):
where N = 14 bits.
In reality, there are other noise sources besides quanti-
zation noise; thermal noise, reference noise, clock jitter,
etc. SNR is computed by taking the ratio of the RMS
signal to the RMS noise, which includes all spectral
components minus the fundamental, the first five har-
monics, and the DC offset.
Signal-to-noise plus distortion (SINAD) is the ratio of the
fundamental input frequency’s RMS amplitude to the
RMS equivalent of all the other ADC output signals.
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-
SINAD dB
(
SNR
)
14-Bit, 135ksps, Single-Supply ADCs with
Signal-to-Noise Plus Distortion
=
20
______________________________________________________________________________________
=
( .
×
6 02
log
Effective Number of Bits
×
(
Noise Distortion
N
Signal-to-Noise Ratio
+
1 76
.
Signal
+
)
dB
RMS
)
RMS
Bipolar Analog Input Range
zation noise only. With an input range equal to the full-
scale range of the ADC, calculate the effective number
of bits as follows:
Total harmonic distortion (THD) is the ratio of the RMS
sum of the first five harmonics of the input signal to the
fundamental itself. This is expressed as:
where V
V
Spurious-free dynamic range (SFDR) is the ratio of the
RMS amplitude of the fundamental (maximum signal
component) to the RMS value of the next largest fre-
quency component.
5
are the 2nd- through 5th-order harmonics.
THD
1
is the fundamental amplitude and V
=
20
×
ENOB
Spurious-Free Dynamic Range
log
Total Harmonic Distortion
=
V
SINAD
2
2
+
6 02
V
.
3
2
−1 76
V
+
1
.
V
4
2
+
V
5
2
2
through
13