MAX1361MEUB Maxim Integrated, MAX1361MEUB Datasheet - Page 22

• Manufacturer Part Number: MAX1361MEUB
• Description: Analog to Digital Converters - ADC
• Manufacturer: Maxim Integrated

Specifications of MAX1361MEUB

• Number Of Channels: 4/2
• Architecture: SAR
• Conversion Rate: 150 KSPs
• Resolution: 10 bit
• Input Type: Single-Ended/Differential
• Snr: Yes
• Interface Type: Serial (2-Wire, I2C, SMBus)
• Operating Supply Voltage: 2.7 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Package / Case: uMAX
• Maximum Power Dissipation: 689.7 mW
• Minimum Operating Temperature: - 40 C
• Number Of Converters: 1
• Voltage Reference: Internal 4.096 V or External

4-Channel, 10-Bit, System Monitor with Programmable
Trip Window and SMBus Alert Response
MAX1361/MAX1362’s INL is 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 less than 1 LSB guarantees
no missing codes and a monotonic transfer function.
Aperture jitter (t
the time between the samples.
Aperture delay (t
edge of the sampling clock and the instant when an
actual sample is taken.
For a waveform perfectly reconstructed from digital
samples, the theoretical maximum SNR is the ratio of
the full-scale analog input (RMS value) to the RMS
quantization error (residual error). The ideal, theoretical
minimum analog-to-digital noise is caused by quantiza-
tion error only and results directly from the ADC’s reso-
lution (N bits):
Figure 16. Power-Supply Grounding Connection
22
*OPTIONAL
R* = 5Ω
______________________________________________________________________________________
SNR (MAX)[dB] = 6.02dB x N + 1.76dB
3V OR 5V
V
DD
AJ
) is the sample-to-sample variation in
AD
MAX1361
MAX1362
) is the time between the falling
0.1μF
4.7μF
SUPPLIES
Differential Nonlinearity
Signal-to-Noise Ratio
GND
V
Aperture Delay
LOGIC
Aperture Jitter
= 3V/5V
3V/5V
CIRCUITRY
DIGITAL
DGND
GND
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 RMS
equivalent of all 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-
zation noise only. With an input range equal to the
ADC’s full-scale range, calculate the ENOB as follows:
Total harmonic distortion (THD) is the ratio of the RMS
sum of the input signal’s first five harmonics to the fun-
damental itself. This is expressed as:
where V
V
harmonics.
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.
5
are the amplitudes of the 2nd- through 5th-order
SINAD dB
SINAD(dB) = 20 x log (SignalRMS/NoiseRMS)
THD
1
is the fundamental amplitude, and V
(
=
20
ENOB = (SINAD - 1.76)/6.02
)
=
×
Signal-to-Noise Plus Distortion
Spurious-Free Dynamic Range
20
log
×
⎛
⎜
⎜
⎝
Total Harmonic Distortion
log
Effective Number of Bits
V
2
⎡
⎢
⎣
2
Noise
+
V
3
Signal
RMS
2
V
+
1
V
+
4
RMS
2
THD
+
V
5
RMS
2
2
through
⎞
⎟
⎟
⎠
⎤ ⎤
⎥
⎦