MAX1188CCUP+T Maxim Integrated, MAX1188CCUP+T Datasheet - Page 12
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MAX1188CCUP+T
Manufacturer Part Number
MAX1188CCUP+T
Description
Analog to Digital Converters - ADC 16-Bit 135ksps 4.2V Precision ADC
Manufacturer
Maxim Integrated
Datasheet
1.MAX1188ACUP.pdf
(14 pages)
Specifications of MAX1188CCUP+T
Rohs
yes
Number Of Channels
1
Architecture
SAR
Conversion Rate
135 KSPs
Resolution
16 bit
Input Type
Single-Ended
Snr
91 dB
Interface Type
Parallel
Operating Supply Voltage
2.7 V to 5.25 V, 4.75 V to 5.25 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
4.096 V
Integral nonlinearity (INL) is the deviation of the values
on an actual transfer function from a straight line. This
straight line can be either a best-straight-line fit or a line
drawn between the end points of the transfer function,
once offset and gain errors have been nullified. The sta-
tic linearity parameters for the MAX1178/MAX1188 are
measured using the end-point method.
Differential nonlinearity (DNL) is the difference between
an actual step width and the ideal value of 1 LSB. A
DNL error specification of 1 LSB guarantees no missing
codes and a monotonic transfer function.
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 = 16 bits.
In reality, there are other noise sources besides quanti-
zation noise: thermal noise, reference noise, clock jitter,
etc. The SNR is computed by taking the ratio of the
RMS signal to the RMS noise, which includes all spec-
tral components minus the fundamental, the first five
harmonics, and the DC offset.
16-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range
12
______________________________________________________________________________________
SNR
=
( .
6 02
Differential Nonlinearity
×
Signal-to-Noise Ratio
Integral Nonlinearity
N
+
1 76
.
Definitions
)
dB
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 error consists of quantiza-
tion noise only. With an input range equal to the full-
scale range of the ADC, calculate the ENOB 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.
SINAD dB
THD
1
is the fundamental amplitude and V
(
=
)
20
=
Signal-to-Noise Plus Distortion
ENOB
Spurious-Free Dynamic Range
20
×
log
×
Total Harmonic Distortion
=
log
Effective Number of Bits
SINAD
V
2
(
Noise
2
6 02
+
.
V
− 1 76
3
2
Signal
V
+
+
1
.
Distortion
V
4
2
RMS
+
V
5
2
2
)
RMS
through