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PDF MAX1177 Data sheet ( Hoja de datos )

Número de pieza MAX1177
Descripción 16-Bit / 135ksps / Single-Supply ADC with 0 to 10V Input Range
Fabricantes Maxim Integrated 
Logotipo Maxim Integrated Logotipo



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No Preview Available ! MAX1177 Hoja de datos, Descripción, Manual

19-2597; Rev 0; 8/03
16-Bit, 135ksps, Single-Supply ADC
with 0 to 10V Input Range
General Description
The MAX1177 is a 16-bit, low-power, successive-
approximation analog-to-digital converter (ADC) featur-
ing automatic power-down, a factory-trimmed internal
clock, and a byte-wide parallel interface. The device
operates from a single +4.75V to +5.25V analog supply
and features a separate digital supply input for direct
interface with +2.7V to +5.25V digital logic.
The MAX1177 accepts an analog input voltage range
from 0 to +10V. It consumes no more than 26.5mW at a
sampling rate of 135ksps when using an external refer-
ence, and 31mW when using the internal +4.096V refer-
ence. AutoShutdown™ reduces supply current to
0.4mA at 10ksps.
The MAX1177 is ideal for high-performance, battery-
powered, data-acquisition applications. Excellent AC
performance (THD = -100dB) and DC accuracy (±3
LSB INL) make this device ideal for industrial process
control, instrumentation, and medical applications.
The MAX1177 is available in a 20-pin TSSOP package
and is fully specified over the -40°C to +85°C extended
temperature range and the 0°C to +70°C commercial
temperature range.
Features
o Byte-Wide Parallel Interface
o Analog Input Voltage Range: 0 to +10V
o Single +4.75V to +5.25V Analog Supply Voltage
o Interfaces with +2.7V to +5.25V Digital Logic
o ±3 LSB INL
o ±1 LSB DNL
o Low Supply Current (max)
2.9mA (External Reference)
3.8mA (Internal Reference)
5µA AutoShutdown Mode
o Small Footprint
o 20-Pin TSSOP Package
PART
MAX1177ACUP
MAX1177BCUP
MAX1177CCUP
MAX1177AEUP
MAX1177BEUP
MAX1177CEUP
Ordering Information
TEMP RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
20 TSSOP
20 TSSOP
20 TSSOP
20 TSSOP
20 TSSOP
20 TSSOP
Applications
Temperature Sensing and Monitoring
Industrial Process Control
I/O Modules
Data-Acquisition Systems
Precision Instrumentation
Pin Configuration and Functional Diagram appear at end of
data sheet.
AutoShutdown is a trademark of Maxim Integrated Products, Inc.
Typical Operating Circuit
+5V ANALOG +5V DIGITAL
0.1µF
0.1µF
ANALOG INPUT
HIGH
BYTE
LOW
BYTE
AVDD
AIN
DVDD
D0–D7
OR
D8–D15
µP DATA
BUS
R/C
CS
HBEN
MAX1177 EOC
REF
REFADJ
AGND DGND
0.1µF
10µF
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

1 page




MAX1177 pdf
16-Bit, 135ksps, Single-Supply ADC
with 0 to 10V Input Range
Typical Operating Characteristics (continued)
(Typical Operating Circuit, AVDD = DVDD = +5V, external reference = +4.096V, CREF = 10µF, CREFADJ = 0.1µF, VREFADJ = AVDD,
CLOAD = 20pF. Typical values are at TA = +25°C, unless otherwise noted.)
SUPPLY CURRENT (AVDD + DVDD)
vs. SAMPLE RATE
10
1
STANDBY MODE
0.1
SHUTDOWN MODE
0.01
0.001
0.0001
0.01
0.1 1 10 100
SAMPLE RATE (ksps)
1000
SHUTDOWN CURRENT (AVDD + DVDD)
vs. TEMPERATURE
5.0
NO CONVERSIONS
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
-40 -20
0 20 40 60
TEMPERATURE (°C)
80
OFFSET ERROR vs. TEMPERATURE
10
8
6
4
2
0
-2
-4
-6
-8
-10
-40 -20
0 20 40 60
TEMPERATURE (°C)
80
GAIN ERROR vs. TEMPERATURE
0.20
0.15
0.10
0.05
0
-0.05
-0.10
-0.15
-0.20
-40 -20
0 20 40 60
TEMPERATURE (°C)
80
INTERNAL REFERENCE
vs. TEMPERATURE
4.136
4.126
4.116
4.106
4.096
4.086
4.076
4.066
4.056
-40 -20
0 20 40 60
TEMPERATURE (°C)
80
FFT AT 1kHz
0
fSAMPLE = 131ksps
-20
-40
-60
-80
-100
-120
-140
-160
-180
0 10 20 30 40 50 60
FREQUENCY (kHz)
100
90
80
70
60
50
40
30
20
10
0
1
SINAD vs. FREQUENCY
fSAMPLE = 131ksps
10
FREQUENCY (kHz)
100
120
100
80
60
40
20
0
1
SFDR vs. FREQUENCY
fSAMPLE = 131ksps
10
FREQUENCY (kHz)
100
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
1
THD vs. FREQUENCY
fSAMPLE = 131ksps
10
FREQUENCY (kHz)
100
_______________________________________________________________________________________ 5

5 Page





MAX1177 arduino
16-Bit, 135ksps, Single-Supply ADC
with 0 to 10V Input Range
Definitions
Integral Nonlinearity
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
static linearity parameters for the MAX1177 are mea-
sured using the end-point method.
Differential Nonlinearity
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.
Signal-to-Noise Ratio
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 ADCs res-
olution (N bits):
SNR = (6.02 × N + 1.76)dB
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.
Signal-to-Noise Plus Distortion
Signal-to-noise plus distortion (SINAD) is the ratio of the
fundamental input frequencys RMS amplitude to the
RMS equivalent of all the other ADC output signals:
SINAD(dB)
=
20
×
log
SignalRMS
(Noise + Distortion)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 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:
ENOB = SINAD 1.76
6.02
Total Harmonic Distortion
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:
THD
=
20
×
log

V22
+
V32
+
V42
+
V52
V1

where V1 is the fundamental amplitude and V2 through
V5 are the 2nd- through 5th-order harmonics.
Spurious-Free Dynamic Range
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.
______________________________________________________________________________________ 11

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