MAX11203 datasheet, PDF - EEWORLD Datasheet

EVALUATION KIT AVAILABLE

MAX11203/MAX11213

16-Bit, Single-Channel, Ultra-Low-Power,

Delta- Sigma ADCs with Programmable Gain

and GPIO

Benefits and Features

●

Minimize Power Consumption with Ultra-Low Power

Dissipation

• Operating-Mode Current Drain < 300µA (max)

• Sleep-Mode Current Drain < 0.4µA

●

Improve Measurement Quality with Excellent DC/AC

Accuracy

• 16-Bit Noise-Free Resolution and No Missing

Codes

• 570nV

RMS

Noise at 10sps, ±3.6V

FS

Input

• 3ppm INL (typ), 20ppm (max)

●

Lower System Cost with Integrated Functionality

• Programmable Gain (1 to 128) (MAX11213)

• Four SPI-Controlled GPIOs for External Mux Control

• Optional Input Buffers on Both Signal and

Reference Inputs

• > 100dB (min) 50Hz/60Hz Rejection

●

Increase System Accuracy with Built-in Self

Calibration

• On-Demand Offset and Gain Self-Calibration and

System Calibration

• User-Programmable Offset and Gain Registers

●

Increase System Robustness and Reliability with

±2kV ESD Protection

• 2.7V to 3.6V Analog Supply Range

• 1.7V to 3.6V Digital and I/O Supply Range

• -40°C to 85°C Operating Temperature Range

General Description

The MAX11203/MAX11213 are ultra-low-power (< 300µA

active current), high-resolution, serial-output ADCs. These

devices provide the highest resolution per unit power

in the industry, and are optimized for applications that

require very high dynamic range with low power, such

as sensors on a 4mA to 20mA industrial control loop.

Optional input buffers provide isolation of the signal inputs

from the switched capacitor sampling network allowing

these converters to be used with high-impedance sources

without compromising available dynamic range or linear-

ity. The devices provide 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

devices are configurable using the SPI interface and are

available in a 16-pin QSOP package.

Applications

Sensor Measurement (Temperature and Pressure)

Portable Instrumentation

Battery Applications

Weigh Scales

QSPI is a trademark of Motorola, Inc.

MICROWIRE is a registered trademark of National

Semiconductor Corp.

µMAX is a registered trademark of Maxim Integrated Products, Inc.

Functional Diagram

AVDD

DVDD

GND

AINP

DIGITAL FILTER

(SINC

4

)

3RD-ORDER

DELTA-SIGMA

MODULATOR

REFP

GPIO

PROGRAMMABLE

GAIN*

1–128

DIGITAL LOGIC

AND SERIAL-

INTERFACE

CONTROLLER

CS

SCLK

DIN

RDY/DOUT

TIMING

CLOCK GENERATOR

CLK

AINN

GPIO1

GPIO2

REFN

MAX11203

MAX11213*

GPIO3

GPIO4

*PROGRAMMABLE GAIN ONLY AVAILABLE ON THE MAX11213.

19-5334; Rev 2; 12/14

MAX11203/MAX11213

16-Bit, Single-Channel, Ultra-Low-Power,

Delta- Sigma ADCs with Programmable Gain

and GPIO

Continuous Power Dissipation (T

A

= +70NC)

16-Pin QSOP (derate 8.3mW/NC above +70NC)..........667mW

Operating Temperature Range .......................... -40NC to +85NC

Junction Temperature .....................................................+150NC

Storage Temperature Range............................ -55NC to +150NC

Lead Temperature (soldering, 10s) ................................+300NC

Soldering Temperature (reflow) ......................................+260NC

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,

CS,

SCLK, DIN,

RDY/DOUT,

GND, GPIO_) ...........

Q2kV

(Note 1)

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, single-cycle mode (SCYCLE = 1), T

A

= T

MIN

to T

MAX

,

unless otherwise noted. Typical values are at T

A

= +25NC under normal conditions, unless otherwise noted.)

PARAMETER

STATIC 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

CMR

NMR

50

NMR

60

50Hz/60Hz rejection at 120sps

50Hz/60Hz rejection at 1sps to 15sps

LINEF = 1, for 1sps to 15sps (Notes 6, 7)

LINEF = 0, for 1sps to 15sps (Notes 6, 7)

AIN buffers disabled

90

144

100

V

GND

144

V

AVDD

dB

V

123

dB

AVDD DC rejection

DVDD DC rejection

70

90

After self and system calibration,

V

REFP

- V

REFN

= 2.5V (Note 5)

-45

0.05

80

100

NFR

V

N

INL

120sps

10sps

120sps

10sps

At 10sps (Note 4)

After self and system calibration,

V

REFP

- V

REFN

= 2.5V

-20

50

+45

16

2.1

0.57

+20

Bits

FV

RMS

ppmFSR

nV/NC

ppmFSR

ppmFSR/

NC

dB

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

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MAX11203/MAX11213

16-Bit, Single-Channel, Ultra-Low-Power,

Delta- Sigma ADCs with Programmable Gain

and GPIO

Electrical Characteristics (continued)

(V

AVDD

= +3.6V, V

DVDD

= +1.7V, V

REFP

- V

REFN

= V

AVDD

; internal clock, single-cycle mode (SCYCLE = 1), T

A

= T

MIN

to T

MAX

,

unless otherwise noted. Typical values are at T

A

= +25NC under normal conditions, unless otherwise noted.)

PARAMETER

SYMBOL

CONDITIONS

Buffers disabled

Low input voltage

Buffers enabled

Absolute Input Voltage

Buffers disabled

High input voltage

Buffers enabled

DC Input Leakage

AIN Dynamic Input Current

REF Dynamic Input Current

AIN Input Capacitance

REF Input Capacitance

AIN Voltage Range

Input Sampling Rate

f

S

Sleep mode

Buffer disabled

Buffer enabled

Buffer disabled

Buffer enabled

Buffer disabled

Unipolar

Bipolar

LINEF = 0

LINEF = 1

Buffers disabled

REF Voltage Range

Buffers enabled

LINEF = 0

LINEF = 1

Input leakage current

V

IL

V

IH

V

HYS

60Hz line frequency

External Clock

55Hz line frequency

50Hz line frequency

LOGIC OUTPUTS (RDY/DOUT, GPIO1–GPIO4)

Output Low Level

Output High Level

Leakage Current

Output Capacitance

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

0.9 x

V

DVDD

Q500

9

0.4

V

nA

pF

0.7 x

V

DVDD

200

2.4576

2.25275

2.048

MHz

0

0.1

246

204.8

Q1

0.3 x

V

DVDD

0

-V

REF

246

204.8

V

AVDD

V

AVDD

- 0.1

V

MIN

TYP

V

GND

-

30mV

V

GND

+

100mV

V

AVDD

+

30mV

V

AVDD

-

100mV

Q1

Q1.4

Q20

Q2.1

Q30

5

7.5

V

REF

+V

REF

FA

FA/V

nA

FA/V

nA

pF

V

kHz

MAX

UNITS

V

REF Sampling Rate

kHz

LOGIC INPUTS (SCLK, CLK, DIN, GPIO1–GPIO4)

Input Current

Input Low Voltage

Input High Voltage

Input Hysteresis

FA

V

mV

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3

MAX11203/MAX11213

16-Bit, Single-Channel, Ultra-Low-Power,

Delta- Sigma ADCs with Programmable Gain

and GPIO

Electrical Characteristics (continued)

(V

AVDD

= +3.6V, V

DVDD

= +1.7V, V

REFP

- V

REFN

= V

AVDD

; internal clock, single-cycle mode (SCYCLE = 1), T

A

= T

MIN

to T

MAX

,

unless otherwise noted. Typical values are at T

A

= +25NC under normal conditions, unless otherwise noted.)

PARAMETER

POWER REQUIREMENTS

Analog Supply

Digital Supply

Total Operating Current

AVDD Sleep Current

AVDD Operating Current

DVDD Sleep Current

DVDD Operating Current

SPI TIMING CHARACTERISTICS

SCLK Frequency

SCLK Clock Period

SCLK Pulse-Width High

SCLK Pulse-Width Low

CS

Low to 1st SCLK Rise Setup

CS

High to 17th SCLK Setup

CS

High After 16th SCLK

Falling Edge Hold

CS

Pulse-Width High

DIN to SCLK Setup

DIN Hold After SCLK

RDY/DOUT

Transition Valid After

SCLK Fall

RDY/DOUT

Remains Valid After

SCLK Fall

RDY/DOUT

Valid Before SCLK Rise

CS

Rise to

RDY/DOUT

Disable

CS

Fall to

RDY/DOUT

Valid

f

SCLK

t

CP

t

CH

t

CL

t

CSS0

t

CSS1

t

CSH1

t

CSW

t

DS

t

DH

t

DOT

t

DOH

t

DOL

t

DOD

t

DOE

Output transition time, data changes on

falling edge of SCLK

Output hold time allows for negative edge

data read

t

DOL

= t

CL

- t

DOT

C

LOAD

= 20pF

Default value of

RDY

is 1 for minimum

specification; maximum specification for

valid 0 on

RDY/DOUT

Maximum time after

RDY

asserts to read

DATA register; t

CNV

is the time for one

conversion

0

3

40

25

40

60% duty cycle at 5MHz

200

80

40

3

40

0

40

5

MHz

ns

Buffers disabled

Buffers enabled

V

AVDD

V

DVDD

AVDD + DVDD

Buffers disabled

Buffers enabled

2.7

1.7

235

255

0.15

185

205

0.25

50

2

65

2

235

3.6

300

V

FA

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

DATA Fetch

Note

2:

3:

4:

5:

t

DF

0

t

CNV

-

60 x t

CP

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.

Positive full-scale error includes zero-scale errors (unipolar offset error or bipolar zero error) and applies to both unipolar

and bipolar input ranges.

Note 6:

For data rates (1, 2.5, 5, 10, 15)sps and (0.83, 2.08, 4.17, 8.33, 12.5)sps.

Note 7:

Normal-mode rejection of power line frequencies of 60Hz/50Hz apply only for single-cycle data rates at 15sps/10sps and

lower or continuous data rate of 60sps/50sps.

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4

MAX11203/MAX11213

16-Bit, Single-Channel, Ultra-Low-Power,

Delta- Sigma ADCs with Programmable Gain

and GPIO

Typical Operating Characteristics

(V

AVDD

= 3.6V, V

DVDD

= 1.8V, V

REFP

- V

REFN

= 2.5V; internal clock; T

A

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are

at T

A

= +25NC.)

ANALOG ACTIVE CURRENT vs. AVDD VOLTAGE

(NO BUFFERS ENABLED)

MAX11203/13 toc01

ANALOG ACTIVE CURRENT vs. AVDD VOLTAGE

(SIGNAL OR REFERENCE BUFFERS ENABLED)

240

220

CURRENT (µA)

MAX11203/13 toc02

ANALOG ACTIVE CURRENT vs. AVDD VOLTAGE

(SIGNAL AND REFERENCE BUFFERS ENABLED)

MAX11203/13 toc03

260

240

220

CURRENT (µA)

LINEF = 0, LINEF = 1

260

280

260

T

A

= +85°C

T

A

= +25°C

T

A

= -45°C

SIGNAL BUFFERS

T

A

= +85°C

CURRENT (µA)

T

A

= +85°C

T

A

= +25°C

T

A

= -45°C

LINEF = 1

240

220

200

180

160

200

180

160

140

120

2.70

2.85

3.00

3.15

3.30

3.45

3.60

AVDD VOLTAGE (V)

200

180

160

140

120

2.70

2.85

T

A

= +25°C

T

A

= -45°C

3.00

3.15

3.30

3.45

3.60

2.70

2.85

3.00

3.15

3.30

3.45

3.60

AVDD VOLTAGE (V)

ANALOG SLEEP CURRENT

vs. AVDD VOLTAGE

MAX11203/13 toc04

ACTIVE SUPPLY CURRENT

vs. TEMPERATURE (LINEF = 0)

MAX11203/13 toc05

ACTIVE SUPPLY CURRENT

vs. TEMPERATURE (LINEF = 1)

MAX11203/13 toc06

1.0

0.8

CURRENT (µA)

0.6

0.4

T

A

= -45°C, +25°C, +85°C

300

250

200

300

250

200

150

100

TOTAL

V

AVDD

= 3.0V

TOTAL

V

AVDD

= 3.0V

CURRENT (µA)

150

100

T

A

= -45°C

0.2

V

DVDD

= 1.8V

50

0

CURRENT (µA)

V

DVDD

= 1.8V

T

A

= +85°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)

0

-45

-25

-5

15

35

55

75

95

TEMPERATURE (°C)

-45

-25

-5

15

35

55

75

95

TEMPERATURE (°C)

SLEEP CURRENT vs. TEMPERATURE

MAX11203/13 toc07

DIGITAL ACTIVE CURRENT

vs. DVDD VOLTAGE

MAX11203/13 toc08

DIGITAL SLEEP CURRENT

vs. DVDD VOLTAGE

MAX11203/13 toc09

1.0

0.8

CURRENT (µA)

0.6

0.4

0.2

130

120

110

CURRENT (µA)

LINEF = 0, LINEF = 1

T

A

= -45°C, +25°C, +85°C

T

A

= +85°C

LINEF = 0

3.0

2.5

2.0

1.5

1.0

0.5

0

CURRENT (µA)

100

90

80

70

60

50

40

T

A

= -45°C

T

A

= +25°C

T

A

= +85°C

TOTAL

DVDD

AVDD

T

A

= -45°C

LINEF = 1

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)

0

-45

-25

-5

15

35

55

75

95

TEMPERATURE (°C)

1.7 1.9 2.1 2.3 2.5 2.7 2.9 3.1 3.3 3.5

DVDD VOLTAGE (V)

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