MAX31629MTA-T datasheet, PDF - EEWORLD Datasheet

Suppliers	Part Number	Price	MOQ	In stock
	MAX31629MTA-T	-	-	View	Buy Now

MAX31629

I

2

C Digital Thermometer and Real-Time Clock

General Description

The MAX31629 I

2

C digital thermometer and real-time

clock (RTC) integrates the critical functions of a real-time

clock and a temperature monitor in a small-outline 8-pin

TDFN package. Communication to the device is accom-

plished through an I

2

C interface. The wide power-supply

range and minimal power requirement of the device allow

for accurate time/temperature measurements in battery-

powered applications.

The digital thermometer provides 9-bit to 12-bit tempera-

ture readings that indicate the temperature of the device.

No additional components are required; the device is truly

a “temperature-to-digital” converter.

The clock/calendar provides seconds, minutes, hours,

day, day of the week, month, day of the month, and year.

The end-of-the-month date is automatically adjusted for

months with less than 31 days, including corrections for

leap years. It operates in either a 12- or 24-hour format

with AM/PM indicator in 12-hour mode. The crystal oscil-

lator frequency is internally divided, as specified by device

configuration. An open-drain output is provided that can

be used as the oscillator input for a microcontroller.

The open-drain alarm output of the device becomes

active when either the measured temperature exceeds

the programmed overtemperature limit (TH) or current

time reaches the programmed alarm setting. The user

can configure which event (time only, temperature only,

either, or neither) generates an alarm condition. For stor-

age of general system data or time/temperature data

logging, the device features 32 bytes of SRAM.

Applications for the device include networking equipment,

industrial equipment, office equipment, thermal data

loggers, or any microprocessor-based, thermally sensitive

system.

Benefits and Features

● Integration of Temperature Sensor and Real-Time

Clock Saves Space and Cost

• Measures Temperatures from -55°C to +125°C

(-67°F to +257°F)

• Real-Time Clock with Leap-Year Compensation

through the Year 2100

• 32 Bytes of SRAM for General Data Storage

• 8-Pin TDFN Package

● Minimal Power Requirements Allow for Accurate

Time/Temperature Measurements in Battery-Powered

Applications

• 2.2V to 5.5V Wide Power-Supply Range

● User-Programmability Flexibly Supports Different

Application Requirements

•

Thermometer Resolution is User Programmable to

9, 10, 11, or 12 Bits

•

Thermostatic and Time Alarm Settings are User

Definable

• Dedicated Open-Drain Alarm Output

● Industry-Standard Serial Interface Works with a

Variety of Common Microcontrollers

• Data is Read from/Written to through an I

2

C Serial

Interface (Open-Drain I/O Lines)

●

Applications

Networking Equipment

Industrial Equipment

Office Equipment

Data Loggers and Any Thermally Sensitive Systems

Ordering Information

appears at end of data sheet.

For related parts and recommended products to use with this part, refer

to

www.maximintegrated.com/MAX31629.related.

19-7305; Rev 1; 12/14

MAX31629

I

2

C Digital Thermometer and Real-Time Clock

Absolute Maximum Ratings

Voltage Range on V

DD

Relative to Ground .........-0.3V to +6.0V

Voltage Range on Any Pin

Relative to Ground................................ -0.3V to (V

DD

+ 0.3V)

ESD Protection (all pins, Human Body Model)

....................2kV

Continuous Power Dissipation (T

A

= +70°C)

TDFN (derate 24.4mW/°C above +70°C ................1951.2mW

Operating Temperature Range ........................ -55°C to +125°C

Storage Temperature Range ............................ -55°C to +125°C

Lead Temperature (soldering, 10s) ................................. +300°C

Soldering Temperature (reflow) .......................................+260°C

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.

Package Thermal Characteristics

(Note 1)

TDFN

Junction-to-Ambient Thermal Resistance (B

JA

).......... 41NC/W

Junction-to-Case Thermal Resistance (B

JC

) ................ 8NC/W

Note 1:

Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer

board. For detailed information on package thermal considerations, refer to

www.maximintegrated.com/thermal-tutorial.

Recommended Operating Conditions

(T

A

= -55°C to +125°C, unless otherwise noted.) (Note 2)

PARAMETER

Voltage Supply

Input Logic 0

Input Logic 1

SYMBOL

V

DD

V

IL

V

IH

(Note 3)

CONDITIONS

MIN

2.2

-0.5

0.7V

DD

TYP

MAX

5.5

0.3 x

V

DD

V

DD

+

0.5

UNITS

V

Electrical Characteristics

PARAMETER

Standby Current

Timekeeping Current

I

2

C Communication

Thermometer Current

Active Current

Logic 0 Output

(SDA, ALRM, OSC)

Input Current, Each I/O Pin

Thermometer Error

Resolution

(2.2V ≤ V

DD

≤ 5.5V, T

A

= -55°C to +125°C, unless otherwise noted.)

SYMBOL

I

DDS

I

DDC

I

DD2

I

DDT

I

DD

V

OL

CONDITIONS

V

DD

= 2.2V (Note 4)

V

DD

= 5.0V (Note 4)

V

DD

= 2.2V (Note 5)

V

DD

= 5.0V (Note 5)

V

DD

= 2.2V (Note 5)

V

DD

= 5.0V (Note 5)

V

DD

= 2.2V (Note 5)

V

DD

= 5.0V (Note 5)

V

DD

= 2.2V (Note 5)

V

DD

= 5.0V (Note 5)

(Note 6)

0.4V < V

I/O

< 0.9 V

DD

T

ERR

-10°C to +85°C, 2.7V < V

DD

< 5.5V

4 sigma, 2.7V < V

DD

< 5.5V

9

0

-10

MIN

TYP

MAX

0.1

0.2

0.8

1

100

150

1100

1200

0.4

+10

±2

±3

12

UNITS

µA

V

µA

°C

Bits

www.maximintegrated.com

Maxim Integrated

│

2

MAX31629

I

2

C Digital Thermometer and Real-Time Clock

Electrical Characteristics (continued)

(2.2V ≤ V

DD

≤ 5.5V, T

A

= -55°C to +125°C, unless otherwise noted.)

PARAMETER

SYMBOL

CONDITIONS

9 bits, 2.7V < V

DD

< 5.5V

Conversion Time

t

CONVT

10 bits, 2.7V < V

DD

< 5.5V

11 bits, 2.7V < V

DD

< 5.5V

12 bits, 2.7V < V

DD

< 5.5V

Crystal Capacitance

ESR

C

(Note 7)

12.5

50

MIN

TYP

MAX

25

50

100

200

pF

kΩ

ms

UNITS

Nonvolatile Memory (EEPROM) Characteristics

((2.7V ≤ V

DD

≤ 5.5V, T

A

= -55°C to +125°C, unless otherwise noted.)

PARAMETER

EEPROM Write Cycle Time

EEPROM Writes

EEPROM Data Retention

SYMBOL

t

WR

N

EEWR

t

EEDR

-55°C to +55°C

50,000

10

CONDITIONS

MIN

TYP

MAX

20

UNITS

ms

Writes

Years

I

2

C AC Electrical Characteristics

(2.2V ≤ V

DD

≤ 5.5V, T

A

= -55°C to +125°C, timing referenced to V

IL(MAX)

and V

IH(MAX)

, unless otherwise noted.) (Note 2) (Figure 1)

PARAMETER

Serial-Clock Frequency

Bus Free Time Between STOP

and START Condition

Repeated START Condition

Setup Time

START Condition Setup Time

START Condition Hold Time

STOP Condition Setup Time

Clock Low Period

Clock High Period

Data-In Hold Time

t

HD:STA

t

SU:STO

t

LOW

t

HIGH

t

HD:DAT

SYMBOL

f

CLK

t

BUF

t

SU:STA

90% of SCL to 90% of SDA, f

CLK

= 400kHz

90% of SDA to 90% of SCL, f

CLK

= 400kHz

90% of SCL to 90% of SDA, f

CLK

= 400kHz

10% to 10%

90% to 90%

(Note 9)

f

CLK

= 400kHz

1.3

0.6

1

0

0.9

CONDITIONS

MIN

TYP

MAX

400

UNITS

kHz

µs

www.maximintegrated.com

Maxim Integrated

│

3

MAX31629

I

2

C Digital Thermometer and Real-Time Clock

I

2

C AC Electrical Characteristics (continued)

(2.2V ≤ V

DD

≤ 5.5V, T

A

= -55°C to +125°C, timing referenced to V

IL(MAX)

and V

IH(MAX)

, unless otherwise noted.) (Note 2) (Figure 1)

PARAMETER

Data-In Setup Time

Input Capacitance

Capacitance Load for Each Bus

Line

SYMBOL

t

SU:DAT

C

I

C

B

(Note 10)

CONDITIONS

MIN

100

5

300

TYP

MAX

UNITS

ns

pF

Note 2:

Limits are 100% production tested at T

A

= +25°C and/or T

A

= +85°C. Limits over the operating temperature range and

relevant supply voltage range are guaranteed by design and characterization. Typical values are not guaranteed.

Note 3:

All voltages referenced to ground.

Note 4:

Standby current specified with temperature conversions and clock oscillator/buffer shut down, ALRM pin open, and SDA,

SCL = V

DD

, 0°C to +70°C.

Note 5:

I

DD_

specified with ALRM pin open, and 0°C to +70°C.

Note 6:

Logic 0 voltage specified at a sink current of 4mA at V

DD

= 5.0V and 1.5mA at V

DD

= 2.2V.

Note 7:

Refer to Application Note 58: Crystal

Considerations with Maxim Real-Time Clocks (RTCs). Recommnded ESR < 50kΩ.

Note 8:

This delay applies only if the oscillator is running. If the oscillator is disabled or stopped, no power-up delay occurs.

Note 9:

A master device must provide a hold time of at least 300ns for the SDA signal to bridge the undefined region of SCL’s

falling edge.

Note 10:

C

B

is the total capacitance of one bus line in pF..

SDA

t

BUF

t

LOW

SCL

t

HIGH

t

HD:DAT

STOP

START

t

SU:DAT

REPEATED

START

t

F

t

HD:STA

t

SP

t

HD:STA

t

R

t

SU:STA

t

SU:STO

NOTE:

TIMING IS REFERENCED TO V

IL(MAX)

AND V

IH(MIN)

.

Figure 1. I

2

C Timing

www.maximintegrated.com

Maxim Integrated

│

4

MAX31629

I

2

C Digital Thermometer and Real-Time Clock

Typical Operating Characteristics

(2.2V ≤ V

DD

≤ 5.5V, T

A

= +25°C, unless otherwise noted.)

1000

900

800

ACTIVE CURENT I

DD

(µA)

700

600

500

400

300

200

100

0

2

ACTIVE CURRENT

vs. SUPPLY VOLTAGE

T

A

= +125°C

T

A

= +85°C

T

A

= +25°C

T

A

= -40°C

toc01

TIMEKEEPING CURRENT

vs. SUPPLY VOLTAGE

3

TIMEKEPING CURENT I

DDC

(µA)

2.5

2

1.5

1

0.5

0

T

A

=

+25°C

T

A

= +85°C

T

A

=

+125°C

toc02

T

A

= -40°C

2

3

4

SUPPLY VOLTAGE (V)

5

6

3

4

5

SUPPLY VOLTAGE (V)

6

OSC FREQUENCY vs. TEMPERATURE

32.8

32.79

32.78

OSC FREQUENCY (kHz)

32.77

32.76

32.75

32.74

32.73

32.72

32.71

32.7

-40

-20

0

20

40

60

80

100

120

V

CC

= 3.3V

toc03

3

TEMPERATURE MEASUREMENT ERROR (°C)

2

1

0

-1

-2

-3

TEMPERATURE MEASUREMENT

ERROR vs. TEMPERATURE

toc04

-55

-30

-5

20

45

70

95

120

TEMPERATURE (°C)

www.maximintegrated.com

Maxim Integrated

│

5

Parameter Name	Attribute value
Product Category	Board Mount Temperature Sensors
Manufacturer	Maxim
RoHS	Details
Output Type	Digital
Configuration	Local
Accuracy	+/- 2 C
Maximum Operating Temperature	+ 125 C
Minimum Operating Temperature	- 55 C
Interface Type	2-Wire, I2C, SMBus
Resolution	9 bit to 12 bit
Supply Voltage - Max	5.5 VDC
Supply Voltage - Min	2 VDC
Shutdown	Shutdown
Temperature Threshold	Programmable
Mounting Style	SMD/SMT
Package / Case	TDFN-8
Product	RTC and Single Temperature Alarm
Packaging	Reel
Pd - Power Dissipation	1951.2 mW
Factory Pack Quantity	2500

	MAX31629MTA-T	MAX31629MTA-
Description	Multilayer Ceramic Capacitors MLCC - SMD/SMT 0603 22uF 6.3volts *Derate Voltage/Temp	Board Mount Temperature Sensors I2C Digital Therm Real Time Clock
Product Category	Board Mount Temperature Sensors	Board Mount Temperature Sensors
Manufacturer	Maxim	Maxim
RoHS	Details	Details
Output Type	Digital	Digital
Configuration	Local	Local
Accuracy	+/- 2 C	+/- 2 C
Maximum Operating Temperature	+ 125 C	+ 125 C
Minimum Operating Temperature	- 55 C	- 55 C
Interface Type	2-Wire, I2C, SMBus	2-Wire/I2C/SMBus
Resolution	9 bit to 12 bit	9 bit to 12 bit
Supply Voltage - Max	5.5 VDC	5.5 VDC
Supply Voltage - Min	2 VDC	2 VDC
Shutdown	Shutdown	No Shutdown
Temperature Threshold	Programmable	Programmable
Mounting Style	SMD/SMT	SMD/SMT
Package / Case	TDFN-8	TDFN-8
Product	RTC and Single Temperature Alarm	RTC, Single Temperature Alarm
Packaging	Reel	Cut Tape
Pd - Power Dissipation	1951.2 mW	1.9512 W
Factory Pack Quantity	2500	1

MAX31629MTA-T

MAX31629MTA-T Online Shopping

MAX31629MTA-T Overview

MAX31629MTA-T Parametric

Preview

MAX31629MTA-T Related Products

Recommended Resources