19-5333; Rev 0; 6/10
TION KIT
EVALUA BLE
AVAILA
24-Bit, Single-Channel, Ultra-Low-Power, Delta
Sigma ADC with 2-Wire Serial Interface
General Description
The MAX11201 is an ultra-low-power (< 320FA 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 MAX11201
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 100dB rejection of 50Hz or 60Hz
line noise. The MAX11201 provides a simple 2-wire serial
interface in the space-saving, 10-pin
FMAX
M
package.
The MAX11201 operates over the -40NC to +85NC tem-
perature range.
Features
S
23.3-Bit ENOB
20.6-Bit Noise-Free Resolution at 13.75sps
19.1-Bit Noise-Free Resolution at 120sps
S
700nV
RMS
Noise ±3.6V
FS
Input (MAX11201B)
S
INL: 3ppm (typ), 10ppm (max)
S
No Missing Codes
S
Ultra-Low Power Dissipation
Operating Mode Current Drain < 320µA (max)
Sleep Mode Current Drain < 0.4µA
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 and Reference Inputs
S
High-Impedance Inputs
Buffers on Signal Inputs
S
Programmable Internal System Clock or External
Clock
2.4576MHz (MAX11201A)
2.25275MHz (MAX11201B)
S
> 100dB (min) 50Hz/60Hz Rejection (MAX11201B)
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
MAX11201
Applications
Sensor Measurement
(Temperature and
Pressure)
Portable Instrumentation
Battery Applications
Weigh Scales
Ordering Information
PART
MAX11201AEUB+
MAX11201BEUB+
PIN-PACKAGE
10
FMAX
10
FMAX
OUTPUT RATE
(sps)
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.
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
RESOLUTION
(BITS)
24
20
18
16
4-WIRE SPI, 16-PIN QSOP,
PROGRAMMABLE GAIN
MAX11210
MAX11206
MAX11209
MAX11213
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.
24-Bit, Single-Channel, Ultra-Low-Power, Delta
Sigma ADC with 2-Wire Serial Interface
MAX11201
ABSOLUTE MAXIMUM RATINGS
Any Pin to GND ....................................................-0.3V to +3.9V
AVDD to GND.......................................................-0.3V to +3.9V
DVDD to GND ......................................................-0.3V to +3.9V
Analog Inputs (AINP, AINN, REFP, REFN)
to GND.............................................. -0.3V to (V
AVDD
+ 0.3V)
Digital Inputs and Digital Outputs
to GND.............................................. -0.3V to (V
DVDD
+ 0.3V)
ESD
HB
(AVDD, AINP, AINN, REFP, REFN, DVDD, CLK, SCLK,
RDY/DOUT,
GND) ............................................
Q2kV
(Note 1)
Continuous Power Dissipation (T
A
= +70NC)
10-Pin
FMAX
(derate 5.6mW/NC above +70NC) ..........444mW
Operating Temperature Range .......................... -40NC to +85NC
Junction Temperature .....................................................+150NC
Storage Temperature Range............................ -55NC to +150NC
Lead Temperature (soldering, 10s) ................................+300NC
Soldering Temperature (reflow) ......................................+260NC
Note 1:
Human Body Model to specification MIL-STD-883 Method 3015.7.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V
AVDD
= +3.6V, V
DVDD
= +1.7V, V
REFP
- V
REFN
= V
AVDD
; internal clock, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values
are at T
A
= +25NC under normal conditions, unless otherwise noted.)
PARAMETER
ADC PERFORMANCE
Noise-Free Resolution
(Notes 2, 3)
Noise (Notes 2, 3)
Integral Nonlinearity
Zero Error
Zero Drift
Full-Scale Error
Full-Scale Error Drift
Power-Supply Rejection
ANALOG INPUTS/REFERENCE INPUTS
DC rejection
Common-Mode Rejection
Normal-Mode 50Hz Rejection
Normal-Mode 60Hz Rejection
Common-Mode Voltage Range
Low input voltage
Absolute Input Voltage
High input voltage
DC Input Leakage
Sleep mode (Note 2)
CMR
NMR
50
NMR
60
50Hz/60Hz rejection, MAX11201A
50Hz/60Hz rejection, MAX11201B
MAX11201B (Note 6)
MAX11201B (Note 6)
90
90
144
100
100
GND
V
GND
+
100mV
V
AVDD
-
100mV
Q1
144
144
V
AVDD
dB
dB
V
123
dB
AVDD DC rejection
DVDD DC rejection
70
90
After calibration, V
REFP
- V
REFN
= 2.5V
(Note 5)
-20
0.05
80
100
NFR
V
N
INL
V
OFF
MAX11201A
MAX11201B
MAX11201A
MAX11201B
(Note 4)
After calibration, V
REFP
- V
REFN
= 2.5V
-10
-10
50
+20
19.1
20.6
2.0
0.70
+10
+10
Bits
FV
RMS
ppmFSR
ppmFSR
nV/NC
ppmFSR
ppmFSR/
NC
dB
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
V
FA
2
______________________________________________________________________________________
24-Bit, Single-Channel, Ultra-Low-Power, Delta
Sigma ADC with 2-Wire Serial Interface
ELECTRICAL CHARACTERISTICS (continued)
(V
AVDD
= +3.6V, V
DVDD
= +1.7V, V
REFP
- V
REFN
= V
AVDD
; internal clock, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values
are at T
A
= +25NC under normal conditions, unless otherwise noted.)
PARAMETER
AIN_ Dynamic Input Current
REF_ Dynamic Input Current
AIN_ Input Capacitance
REF_ Input Capacitance
AIN_ Voltage Range
REF_ Voltage Range
Input Sampling Rate
REF Sampling Rate
LOGIC INPUTS (SCLK, CLK)
Input Current
Input Low Voltage
Input High Voltage
Input Hysteresis
External Clock
LOGIC OUTPUT (RDY/DOUT)
Output Low Level
Output High Level
Leakage Current
Output Capacitance
POWER REQUIREMENTS
Analog Supply Voltage
Digital Supply Voltage
Total Operating Current
DVDD Operating Current
AVDD Operating Current
AVDD Sleep Current
DVDD Sleep Current
2-WIRE SERIAL-INTERFACE TIMING CHARACTERISTICS
SCLK Frequency
SCLK Pulse Width Low
SCLK Pulse Width High
SCLK Rising Edge to Data Valid
Transition Time
f
SCLK
t
1
t
2
t
3
60/40 duty cycle, 5MHz clock
40/60 duty cycle, 5MHz clock
80
80
40
5
MHz
ns
ns
ns
AVDD
DVDD
AVDD + DVDD
2.7
1.7
245
50
195
0.15
0.25
3.6
3.6
320
60
265
2
2
V
V
FA
FA
FA
FA
FA
V
OL
V
OH
I
OL
= 1mA; also tested for V
DVDD
= 3.6V
I
OH
= 1mA; also tested for V
DVDD
= 3.6V
High-impedance state
High-impedance state
0.9 x
V
DVDD
Q10
9
0.4
V
V
FA
pF
V
IL
V
IH
V
HYS
MAX11201A
MAX11201B
0.7 x
V
DVDD
200
2.4576
2.25275
Input leakage current
Q1
0.3 x
V
DVDD
FA
V
V
mV
MHz
f
S
MAX11201A
MAX11201B
MAX11201A
MAX11201B
AINP - AINN
-V
REF
0
246
225
246
225
SYMBOL
CONDITIONS
MIN
TYP
±20
±30
5
7.5
+V
REF
V
AVDD
MAX
UNITS
nA
nA
pF
pF
V
V
kHz
kHz
MAX11201
_______________________________________________________________________________________
3
24-Bit, Single-Channel, Ultra-Low-Power, Delta
Sigma ADC with 2-Wire Serial Interface
MAX11201
ELECTRICAL CHARACTERISTICS (continued)
(V
AVDD
= +3.6V, V
DVDD
= +1.7V, V
REFP
- V
REFN
= V
AVDD
; internal clock, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values
are at T
A
= +25NC under normal conditions, unless otherwise noted.)
PARAMETER
SCLK Rising Edge Data Hold
Time
RDY/DOUT
Fall to SCLK Rising
Edge
Next Data Update Time;
No Read Allowed
Data Conversion Time
Data Ready Time After Calibration
Starts (CAL + CNV)
SCLK High After
RDY/DOUT
Goes Low to Activate Sleep Mode
Time from
RDY/DOUT
Low to
SCLK High for Sleep-Mode
Activation
Data Ready Time After Wake-Up
From Sleep Mode
Data Ready Time After Calibration
From Sleep Mode Wake-Up (CAL
+ CNV)
Note
Note
Note
Note
Note
2:
3:
4:
5:
6:
SYMBOL
t
4
t
5
t
6
t
7
t
8
t
9
t
10
t
11
t
12
MAX11201A
MAX11201B
MAX11201A
MAX11201B
MAX11201A
MAX11201B
MAX11201A
MAX11201B
MAX11201A
MAX11201B
MAX11201A
MAX11201B
MAX11201A
MAX11201B
0
0
0
0
8.6
73
208.4
256.2
CONDITIONS
Allows for positive edge data read
MIN
3
0
155
169
8.6
73
208.3
256.1
8.6
73
8.6
73
TYP
MAX
UNITS
ns
ns
Fs
ms
ms
ms
ms
ms
ms
These specifications are not fully tested and are guaranteed by design and/or characterization.
V
AINP
= V
AINN
.
ppmFSR is parts per million of full-scale range.
Positive full-scale error includes zero-scale errors.
The MAX11201A has no normal-mode rejection at 50Hz or 60Hz.
4
______________________________________________________________________________________
24-Bit, Single-Channel, Ultra-Low-Power, Delta
Sigma ADC with 2-Wire Serial Interface
Typical Operating Characteristics
(V
AVDD
= 3.6V, V
DVDD
= 1.8V, V
REFP
- V
REFN
= AVDD; internal clock; T
A
= T
MIN
to T
MAX
, unless otherwise specified. Typical values
are at T
A
= +25NC.)
ANALOG ACTIVE CURRENT
vs. AVDD VOLTAGE (MAX11201A)
MAX11201 toc01
MAX11201
ANALOG ACTIVE CURRENT
vs. AVDD VOLTAGE (MAX11201B)
220
200
CURRENT (µA)
CURRENT (µA)
180
160
140
120
100
0.2
T
A
= +25°C
0.6
0.4
MAX11201 toc02
ANALOG SLEEP CURRENT
vs. AVDD VOLTAGE
MAX11201 toc03
240
220
200
CURRENT (µA)
180
160
140
120
100
2.70
2.85
3.00
3.15
3.30
3.45
T
A
= -45°C
T
A
= +85°C
T
A
= +25°C
240
T
A
= +85°C
1.0
0.8
T
A
= -45°C
T
A
= +25°C
0
2.70
2.85
3.00
3.15
3.30
3.45
3.60
T
A
= +85°C
T
A
= -45°C
3.60
2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6
AVDD VOLTAGE (V)
AVDD VOLTAGE (V)
AVDD VOLTAGE (V)
ACTIVE SUPPLY CURRENT
vs. TEMPERATURE (MAX11201A)
MAX11201 toc04
ACTIVE SUPPLY CURRENT
vs. TEMPERATURE (MAX11201B)
MAX11201 toc05
SLEEP CURRENT vs. TEMPERATURE
V
AVDD
= 3.0V
0.8
CURRENT (µA)
MAX11201 toc06
300
250
200
150
100
50
0
-45
-25
-5
15
35
55
75
V
DVDD
= 1.8V
TOTAL
V
AVDD
= 3.0V
300
250
200
150
100
50
0
V
DVDD
= 1.8V
1.0
TOTAL
V
AVDD
= 3.0V
CURRENT (µA)
CURRENT (µA)
0.6
0.4
0.2
0
-45
-25
-5
15
35
55
75
95
TEMPERATURE (°C)
DVDD
TOTAL
AVDD
95
-45
-25
-5
15
35
55
75
95
TEMPERATURE (°C)
TEMPERATURE (°C)
DIGITAL ACTIVE CURRENT
vs. DVDD VOLTAGE
MAX11201 toc07
DIGITAL SLEEP CURRENT
vs. DVDD VOLTAGE
MAX11201 toc08
INTERNAL OSCILLATOR FREQUENCY
vs. TEMPERATURE
V
AVDD
= 3.0V
MAX11201A
MAX11201 toc09
130
120
110
CURRENT (µA)
T
A
= +85°C, +25°C, -45°C
3.0
2.5
2.0
1.5
1.0
0.5
0
T
A
= +85°C
T
A
= -45°C
T
A
= +25°C
2.6
2.5
FREQUENCY (MHz)
90
80
70
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)
MAX11201B
CURRENT (µA)
100
MAX11201A
2.4
2.3
2.2
2.1
2.0
MAX11201B
1.7 1.9 2.1 2.3 2.5 2.7 2.9 3.1 3.3 3.5
DVDD VOLTAGE (V)
-45
-25
-5
15
35
55
75
95
TEMPERATURE (°C)
_______________________________________________________________________________________
5
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