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PDF MAX11202 Data sheet ( Hoja de datos )
| Número de pieza | MAX11202 | |
| Descripción | Delta- Sigma ADC with 2-Wire Serial Interface | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
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19-5237; Rev 0; 4/10
www.DataSheet4U.com
24-Bit, Single-Channel, Ultra-Low-Power, Delta
Sigma ADC with 2-Wire Serial Interface
General Description
The MAX11202 is an ultra-low-power (< 300FA max
active current), high-resolution, serial output ADC. This
device provides the highest resolution per unit power in
the industry and is optimized for applications that require
very high dynamic range with low power such as sensors
on a 4mA to 20mA industrial control loop. The MAX11202
provides a high-accuracy internal oscillator that requires
no external components.
When used with the specified data rates, the internal digital
filter provides more than 80dB rejection of 50Hz or 60Hz
line noise. The MAX11202 provides a simple 2-wire serial
interface in the space-saving, 10-pin FMAXM package.
The MAX11202 operates over the -40NC to +85NC tem-
perature range.
Applications
Sensor Measurement (Temperature and
Pressure)
Portable Instrumentation
Battery Applications
Weigh Scales
Features
S 24-Bit Full-Scale Resolution
20.5-Bit Noise-Free Resolution at 13.75sps
19-Bit Noise-Free Resolution at 120sps
S 720nVRMS Noise (MAX11202B)
S 3ppm INL
S No Missing Codes
S Ultra-Low Power Dissipation
Operating Mode Current Drain < 300µA (max)
Sleep Mode Current Drain < 0.1µA
S 2.7V to 3.6V Analog Supply Voltage Range
S 1.7V to 3.6V Digital and I/O Supply Voltage Range
S Fully Differential Signal Inputs
S Fully Differential Reference Inputs
S Internal System Clock
2.4576MHz (MAX11202A)
2.2528MHz (MAX11202B)
S External Clock
S Serial 2-Wire Interface (Clock Input and Data Output)
S On-Demand Offset and Gain Self-Calibration
S -40°C to +85°C Operating Temperature Range
S ±2kV ESD Protection
S Lead(PB)-Free and RoHS-Compliant µMAX Package
RESOLUTION
(BITS)
24
20
18
16
4-WIRE SPI, 16-PIN QSOP,
PROGRAMMABLE GAIN
MAX11210
MAX11206
MAX11209
MAX11213
Ordering Information
PART
PIN-PACKAGE
OUTPUT RATE
(sps)
MAX11202AEUB+ 10 FMAX
MAX11202BEUB+ 10 FMAX
120
13.75
Note: All devices are specified over the -40NC to +85NC oper-
ating temperature range.
+Denotes a lead(Pb)-free/RoHS-compliant package.
Selector Guide
4-WIRE SPI,
16-PIN QSOP
MAX11200
MAX11207
MAX11211
MAX11203
2-WIRE SERIAL,
10-PIN μMAX
MAX11201 (with buffers)
MAX11202 (without buffers)
MAX11208
MAX11212
MAX11205
µMAX is a registered trademark of Maxim Integrated Products, Inc.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
1 page  
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24-Bit, Single-Channel, Ultra-Low-Power, Delta
Sigma ADC with 2-Wire Serial Interface
Typical Operating Characteristics
(VAVDD = 3.6V, VDVDD = 1.8V, VREFP - VREFN = AVDD; internal clock; TA = TMIN to TMAX, unless otherwise specified. Typical values
are at TA = +25NC.)
ANALOG ACTIVE CURRENT
vs. AVDD VOLTAGE (MAX11202A)
240
VDVDD = 1.8V
220
TA = +85°C
200
180 TA = +25°C
160 TA = -45°C
140
120
100
2.70 2.85 3.00 3.15 3.30 3.45 3.60
AVDD VOLTAGE (V)
ACTIVE SUPPLY CURRENT
vs. TEMPERATURE (MAX11202A)
300
250
TOTAL
200
VAVDD = 3.6V
150
100
VDVDD = 1.8V
50
0
-45 -25 -5 15 35 55 75 95
TEMPERATURE (°C)
DIGITAL ACTIVE CURRENT
vs. DVDD VOLTAGE
130
VAVDD = 3.6V
120 TA = +85°C, +25°C, -45°C
110
100 MAX11202A
90
80
70 MAX11202B
60
50
40
1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6
DVDD VOLTAGE (V)
ANALOG ACTIVE CURRENT
vs. AVDD VOLTAGE (MAX11202B)
240
VDVDD = 1.8V
220
TA = +85°C
200
180 TA = +25°C
160 TA = -45°C
140
120
100
2.70 2.85 3.00 3.15 3.30 3.45 3.60
AVDD VOLTAGE (V)
ACTIVE SUPPLY CURRENT
vs. TEMPERATURE (MAX11202B)
300
250
TOTAL
200
VAVDD = 3.6V
150
100
50 VDVDD = 1.8V
0
-45 -25 -5 15 35 55 75 95
TEMPERATURE (°C)
DIGITAL SLEEP CURRENT vs. DVDD
VOLTAGE (MAX11202A/MAX11202B)
3.0
VAVDD = 3.6V
2.5 TA = -45°C
2.0 TA = +25°C
1.5
1.0
TA = +85°C
0.5
0
1.7 1.9 2.1 2.3 2.5 2.7 2.9 3.1 3.3 3.5
DVDD VOLTAGE (V)
ANALOG SLEEP CURRENT vs. AVDD
VOLTAGE (MAX11202A/MAX11202B)
1.0
VDVDD = 1.8V
0.8
0.6
0.4
0.2 TA = +85°C TA = -45°C
TA = +25°C
0
2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6
AVDD VOLTAGE (V)
SLEEP CURRENT vs. TEMPERATURE
(MAX11202A/MAX11202B)
1.0
VAVDD = 3.6V
VDVDD = 1.8V
0.8
0.6
0.4
0.2
VAVDD
VDVDD TOTAL
0
-45 -25 -5 15 35 55 75 95
TEMPERATURE (°C)
INTERNAL OSCILLATOR FREQUENCY
vs. TEMPERATURE
2.6
VDVDD = 1.8V
2.5 VAVDD = 3.0V
MAX11202A
2.4
2.3 MAX11202B
2.2
2.1
2.0
-45 -25 -5 15 35 55 75 95
TEMPERATURE (°C)
_______________________________________________________________________________________ 5
5 Page 
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24-Bit, Single-Channel, Ultra-Low-Power, Delta
Sigma ADC with 2-Wire Serial Interface
SCLK
RDY/DOUT
t5
1
t3
t1
t2
23
D23 D22
CONVERSION IS DONE
DATA IS AVAILABLE
24
t4
D0
t7
t6
CONVERSION IS DONE
DATA IS AVAILABLE
Figure 1. Timing Diagram for Data Read After Conversion
SCLK
12 3
RDY/DOUT
CONVERSION IS DONE
DATA IS AVAILABLE
D23 D22
24
D0
25
25TH SLK RISING EDGE
PULLS RDY/DOUT
HIGH
CONVERSION IS DONE
DATA IS AVAILABLE
Figure 2. Timing Diagram for Data Read Followed by RDY/DOUT Being Asserted High Using 25th SCLK
SCLK
12 3
RDY/DOUT
CONVERSION IS DONE
DATA IS AVAILABLE
D23 D22
CALIBRATION STARTS ON 26TH SCLK
24 25
26
25TH SCLK PULLS
RDY/DOUT HIGH
D0
12
D23 D22
CONVERSION IS DONE
DATA IS AVAILABLE AFTER CALIBRATION
t8
Figure 3. Timing Diagram for Data Read Followed by Two Extra Clock Cycles for Self-Calibration
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet MAX11202.PDF ] | |
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