MAX11202AEUB datasheet, PDF - EEWORLD Datasheet

MAX11202

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

FMAX

M

package.

The MAX11202 operates over the -40NC to +85NC tem-

perature range.

Features

S

24-Bit Full-Scale Resolution

20.5-Bit Noise-Free Resolution at 13.75sps

19-Bit Noise-Free Resolution at 120sps

S

720nV

RMS

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

Applications

Sensor Measurement (Temperature and

Pressure)

Portable Instrumentation

Battery Applications

Weigh Scales

Ordering Information

PART

MAX11202AEUB+

MAX11202BEUB+

PIN-PACKAGE

10

FMAX

10

FMAX

OUTPUT RATE

(sps)

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

RESOLUTION

(BITS)

24

20

18

16

4-WIRE SPI, 16-PIN QSOP,

PROGRAMMABLE GAIN

MAX11210

MAX11206

MAX11209

MAX11213

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.

For pricing, delivery, and ordering information, please contact Maxim Direct

at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.

19-5237; Rev 0; 4/10

MAX11202

24-Bit, Single-Channel, Ultra-Low-Power, Delta

Sigma ADC with 2-Wire Serial Interface

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

= +1.8V, 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

AIN Dynamic Input Current

REF Dynamic Input Current

Sleep mode (Note 2)

CMR

NMR50

NMR60

50Hz/60Hz rejection, MAX11202A

50Hz/60Hz rejection, MAX11202B

MAX11202B (Note 6)

90

144

65

73

GND

GND -

30mV

VAVDD

+ 30mV

Q1

5

7.5

80.5

87

VAVDD

dB

V

FA

123

dB

AVDD DC rejection

DVDD DC rejection

70

90

After calibration, VREFP - VREFN = 2.5V

(Note 5)

-30

SYMBOL

NFR

VN

INL

VOFF

MAX11202A

MAX11202B

MAX11202A

MAX11202B

(Note 4)

After calibration, VREFP - VREFN = 2.5V

-10

-13

1

50

3

0.05

80

100

+30

CONDITIONS

MIN

TYP

19

20.5

2.1

0.72

+10

+13

MAX

UNITS

Bits

FV

RMS

ppmFSR

nV/NC

ppmFSR

ppmFSR/

NC

dB

2

Maxim Integrated

MAX11202

24-Bit, Single-Channel, Ultra-Low-Power, Delta

Sigma ADC with 2-Wire Serial Interface

ELECTRICAL CHARACTERISTICS (continued)

(V

AVDD

= +3.6V, V

DVDD

= +1.8V, 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 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

Floating State Leakage Current

Floating State 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

fSCLK

t1

t2

t3

60/40 duty cycle, 5MHz clock

40/60 duty cycle, 5MHz clock

80

40

5

MHz

ns

AVDD

DVDD

AVDD + DVDD

2.7

1.7

230

45

185

0.4

0.35

3.6

300

60

245

2

V

FA

VIL

VIH

VHYS

MAX11202A

MAX11202B

VOL

VOH

IOL = 1mA; also tested for VDVDD = 3.6V

IOH = 1mA; also tested for VDVDD = 3.6V

Output leakage current

0.9 x

VDVDD

Q10

9

0.7 x

VDVDD

200

2.4576

2.2528

0.4

Input leakage current

Q1

0.3 x

VDVDD

FA

V

mV

MHz

fS

MAX11202A

MAX11202B

MAX11202A

MAX11202B

246

225

246

225

AINP - AINN

-VREF

SYMBOL

CONDITIONS

MIN

TYP

10

15

+VREF

VAVDD

MAX

UNITS

pF

V

kHz

V

FA

pF

Maxim Integrated

3

MAX11202

24-Bit, Single-Channel, Ultra-Low-Power, Delta

Sigma ADC with 2-Wire Serial Interface

ELECTRICAL CHARACTERISTICS (continued)

(V

AVDD

= +3.6V, V

DVDD

= +1.8V, 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

2:

3:

4:

5:

6:

SYMBOL

t4

t5

t6

t7

t8

t9

t10

t11

t12

MAX11202A

MAX11202B

MAX11202A

MAX11202B

MAX11202A

MAX11202B

MAX11202A

MAX11202B

MAX11202A

MAX11202B

MAX11202A

MAX11202B

MAX11202A

MAX11202B

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

Fs

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 MAX11202A has no normal-mode rejection at 50Hz or 60Hz.

4

Maxim Integrated

MAX11202

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 (MAX11202A)

MAX11202 toc01

ANALOG ACTIVE CURRENT

vs. AVDD VOLTAGE (MAX11202B)

V

DVDD

= 1.8V

220

200

CURRENT (µA)

180

160

140

120

100

0.2

T

A

= +85°C

T

A

= +25°C

T

A

= -45°C

MAX11202 toc02

ANALOG SLEEP CURRENT vs. AVDD

VOLTAGE (MAX11202A/MAX11202B)

V

DVDD

= 1.8V

0.8

CURRENT (µA)

0.6

0.4

T

A

= +85°C

T

A

= -45°C

MAX11202 toc03

240

V

DVDD

= 1.8V

220

200

CURRENT (µA)

180

160

140

120

100

2.70

2.85

3.00

3.15

3.30

3.45

T

A

= +85°C

T

A

= +25°C

T

A

= -45°C

240

1.0

T

A

= +25°C

0

2.70

2.85

3.00

3.15

3.30

3.45

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)

ACTIVE SUPPLY CURRENT

vs. TEMPERATURE (MAX11202A)

MAX11202 toc04

ACTIVE SUPPLY CURRENT

vs. TEMPERATURE (MAX11202B)

MAX11202 toc05

SLEEP CURRENT vs. TEMPERATURE

(MAX11202A/MAX11202B)

V

AVDD

= 3.6V

V

DVDD

= 1.8V

MAX11202 toc06

300

250

200

150

100

V

DVDD

= 1.8V

50

0

-45

-25

-5

15

35

55

75

300

250

TOTAL

CURRENT (µA)

200

V

AVDD

= 3.6V

150

100

50

0

V

DVDD

= 1.8V

1.0

0.8

CURRENT (µA)

0.6

0.4

0.2

0

V

DVDD

TOTAL

V

AVDD

= 3.6V

CURRENT (µA)

V

AVDD

95

-45

-25

-5

15

35

55

75

95

-45

-25

-5

15

35

55

75

95

TEMPERATURE (°C)

DIGITAL ACTIVE CURRENT

vs. DVDD VOLTAGE

MAX11202 toc07

DIGITAL SLEEP CURRENT vs. DVDD

VOLTAGE (MAX11202A/MAX11202B)

MAX11202 toc08

INTERNAL OSCILLATOR FREQUENCY

vs. TEMPERATURE

V

DVDD

= 1.8V

V

AVDD

= 3.0V

MAX11202 toc09

130

120

110

CURRENT (µA)

100

90

80

70

60

50

40

V

AVDD

= 3.6V

T

A

= +85°C, +25°C, -45°C

3.0

V

AVDD

= 3.6V

2.5

2.0

1.5

1.0

T

A

= +85°C

0.5

0

T

A

= -45°C

T

A

= +25°C

2.6

2.5

FREQUENCY (MHz)

2.4

2.3

2.2

2.1

2.0

MAX11202B

MAX11202A

MAX11202B

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)

CURRENT (µA)

MAX11202A

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)

Maxim Integrated

5

MAX11202AEUB

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