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PDF MAX11212 Data sheet ( Hoja de datos )

Número de pieza MAX11212
Descripción Delta- Sigma ADC with 2-Wire Serial Interface
Fabricantes Maxim Integrated Products　
Logotipo Maxim Integrated Products Logotipo



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No Preview Available ! MAX11212 Hoja de datos, Descripción, Manual

19-5247; Rev 0; 4/10
www.DataSheet4U.com
18-Bit, Single-Channel, Ultra-Low Power, Delta-
Sigma ADC with 2-Wire Serial Interface
General Description
The MAX11212 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
MAX11212 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 MAX11212 provides a simple 2-wire
serial interface in the space-saving, 10-pin FMAXM pack-
age. The MAX11212 operates over the -40NC to +85NC
temperature range.
Applications
Sensor Measurement (Temperature and
Pressure)
Portable Instrumentation
Battery Applications
Weigh Scales
Features
S 18-Bit Full-Scale Resolution
S 720nVRMS Noise (MAX11212B)
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 (MAX11212A)
2.2528MHz (MAX11212B)
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)
4-WIRE SPI, 16-PIN QSOP,
PROGRAMMABLE GAIN
24 MAX11210
20 MAX11206
18 MAX11209
16 MAX11213
µMAX is a registered trademark of Maxim Integrated Products, Inc.
Ordering Information
PART
PIN-PACKAGE
OUTPUT RATE
(sps)
MAX11212AEUB+*
MAX11212BEUB+
10 FMAX
10 FMAX
120
13.75
Note: All devices are specified over the -40°C to +85°C oper-
ating temperature range.
+Denotes a lead(Pb)-free/RoHS-compliant package.
*Future product—contact factory for availability.
4-WIRE SPI,
16-PIN QSOP
MAX11200
MAX11207
MAX11211
MAX11203
Selector Guide
2-WIRE SERIAL,
10-PIN μMAX
MAX11201 (with buffers)
MAX11202 (without buffers)
MAX11208
MAX11212
MAX11205
________________________________________________________________ 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




MAX11212 pdf
www.DataSheet4U.com
18-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 = VAVDD; internal clock; TA = TMIN to TMAX, unless otherwise noted. Typical values
are at TA = +25NC.)
ANALOG ACTIVE CURRENT
vs. AVDD VOLTAGE (MAX11212A)
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 (MAX11212A)
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 MAX11212A
90
80
70 MAX11212B
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 (MAX11212B)
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 (MAX11212B)
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 (MAX11212A/MAX11212B)
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 (MAX11212A/MAX11212B)
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
(MAX11212A/MAX11212B)
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
MAX11212A
2.4
2.3 MAX11212B
2.2
2.1
2.0
-45 -25 -5 15 35 55 75 95
TEMPERATURE (°C)
_______________________________________________________________________________________   5

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MAX11212 arduino
www.DataSheet4U.com
18-Bit, Single-Channel, Ultra-Low Power, Delta-
Sigma ADC with 2-Wire Serial Interface
SCLK
12 3
RDY/DOUT
CONVERSION IS DONE
DATA IS AVAILABLE
D17 D16
CALIBRATION STARTS ON 26TH SCLK
24 25
26
12
25TH SCLK PULLS
RDY/DOUT HIGH
0
D17 D16
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
SCLK
RDY/DOUT
CONVERSION IS DONE
DATA IS AVAILABLE
123
t9
t10
D17 D16
DEVICE ENTERS
SLEEP MODE
24
0
SLEEP
MODE
DEVICE EXITS OUT
SLEEP MODE
1
2
D17
CONVERSION IS DONE
DATA IS AVAILABLE
t11
D16
Figure 4. Timing Diagram for Data Read Followed by Sleep Mode Activation; Single-Conversion Timing
Data Read Followed by Sleep Mode
The MAX11212 can be put into sleep mode to save
power between conversions. To activate the sleep mode,
idle the SCLK high any time after the RDY/DOUT output
goes low (that is, after conversion data is available). It is
not required to read out all 18 bits before putting the part
in sleep mode. Sleep mode is activated after the SCLK
is held high (see Figure 4). The RDY/DOUT output is
pulled high once the device enters sleep mode. To come
out of sleep mode, pull SCLK low. After the sleep mode
is deactivated (when the device wakes up), conversion
starts again and RDY/DOUT goes low, indicating the
next conversion data is available. See Figure 4.
Single-Conversion Mode
For operating the MAX11212 in single-conversion mode,
activate and deactivate sleep mode between conver-
sions as described in the Data Read Followed by Sleep
Mode section). Single-conversion mode reduces power
consumption by shutting down the device when idle
between conversions. See Figure 4.
Single-Conversion Mode with
______________________________________________________________________________________   11

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