AD7417 datasheet, PDF - EEWORLD Datasheet

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AD7417: DescriptionDIGITAL TEMP SENSOR-SERIAL, 10BIT(s), 3Cel, SURFACE MOUNT; CategoryThe sensor; File Size513KB，23 Pages; ManufacturerADI; Websitehttps://www.analog.com

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AD7417 Overview

DIGITAL TEMP SENSOR-SERIAL, 10BIT(s), 3Cel, SURFACE MOUNT

User Manual

【User Guides】UG-622: Evaluating the AD7416/AD7417/AD7418 10-Bit ADCs with On-Chip Temperature Sensor

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Data Sheet

FEATURES

10-bit ADC with 15 μs and 30 μs conversion times

Single and 4 single-ended analog input channels

On-chip temperature sensor: −40°C to +125°C

On-chip track-and-hold

Overtemperature indicator

Automatic power-down at the end of a conversion

Wide operating supply range: 2.7 V to 5.5 V

C-compatible serial interface

Selectable serial bus address allows connection of up to 8

AD7416/AD7417 devices to a single bus

AD7416 is a superior replacement for LM75

10-Bit Digital Temperature Sensor

(AD7416) and 4-/1-Channel ADCs

AD7416/AD7417/AD7418

FUNCTIONAL BLOCK DIAGRAMS

BAND GAP

TEMPERATURE

SENSOR

10-BIT

ANALOG-TO-DIGITAL

CONVERTER

TEMPERATURE

VALUE

ADDRESS

POINTER

OTI

SETPOINT

HYST

SETPOINT

CONFIGURATION

SERIAL BUS

INTERFACE

FAULT

QUEUE

COUNTER

AD7416

SETPOINT

COMPARATOR

OTI

GND

SDA

SCL

01126-001

APPLICATIONS

Data acquisition with ambient temperature monitoring

Industrial process control

Automotive

Battery-charging applications

Personal computers

Figure 1. AD7416

REF

OTI

SETPOINT B

TEMP

SENSOR

REF

2.5V

IN1 7

IN2 8

IN3 9

IN4 10

BALANCE

A>B

OTI

GENERAL DESCRIPTION

The AD7417 and AD7418 are 10-bit, 4-channel and single-channel

ADCs with an on-chip temperature sensor that can operate from a

single 2.7 V to 5.5 V power supply. The devices contain a 15 μs

successive approximation converter, a 5-channel multiplexer, a

temperature sensor, a clock oscillator, a track-and-hold, and a

reference (2.5 V). The AD7416 is a temperature-monitoring only

device in an 8-lead package.

The temperature sensor on the parts can be accessed via multip-

lexer Channel 0. When Channel 0 is selected and a conversion

is initiated, the resulting ADC code at the end of the conversion

gives a measurement of the ambient temperature (±1°C at 25°C).

On-chip registers can be programmed with high and low tempera-

ture limits, and an open-drain overtemperature indicator (OTI)

output is provided, which becomes active when a programmed

limit is exceeded.

A configuration register allows programming of the sense of the

OTI output (active high or active low) and its operating mode

(comparator or interrupt). A programmable fault queue counter

allows the number of out-of-limit measurements that must

occur before triggering the OTI output to be set to prevent

spurious triggering of the OTI output in noisy environments.

CHARGE

DISTRIBUTION

DAC

DATA OUT

MUX

SAMPLING

CAPACITOR

CLOCK CONTROL

LOGIC

INTERFACE

SCL

SDA

AD7417

01126-002

GND

CONVST

NC = NO CONNECT

Figure 2. AD7417

REF

OTI

SETPOINT B

TEMP

SENSOR

REF

2.5V

IN 5

MUX

SAMPLING

CAPACITOR

CHARGE

DISTRIBUTION

DAC

A>B

DATA OUT

OTI

CLOCK CONTROL

LOGIC

INTERFACE

SCL

SDA

AD7418

01126-003

BALANCE

GND

CONVST

Figure 3. AD7418

Rev. J

Document Feedback

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Technical Support

www.analog.com

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

rights of third parties that may result from its use. Specifications subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks and registered trademarks are the property of their respective owners.

AD7416/AD7417/AD7418

TABLE OF CONTENTS

Features .............................................................................................. 1

Applications ....................................................................................... 1

General Description ......................................................................... 1

Functional Block Diagrams ............................................................. 1

Revision History ............................................................................... 2

Product Highlights ........................................................................... 3

Specifications..................................................................................... 4

AD7417/AD7418 Specifications................................................. 4

AD7416 Specifications ................................................................. 6

Absolute Maximum Ratings ............................................................ 7

ESD Caution .................................................................................. 7

Pin Configurations and Function Descriptions ........................... 8

Terminology .................................................................................... 10

Theory of Operation ...................................................................... 11

Circuit Information .................................................................... 11

Converter Details........................................................................ 11

Typical Connection Diagram.................................................... 11

Analog Inputs .............................................................................. 11

Data Sheet

On-Chip Reference .................................................................... 11

Temperature Measurement ....................................................... 12

Internal Register Structure ........................................................ 12

Serial Bus Interface..................................................................... 14

OTI Output ................................................................................. 17

Fault Queue ................................................................................. 17

Power-On Defaults ..................................................................... 17

Operating Modes ........................................................................ 17

CONVST Start Mode ................................................................. 18

Applications Information .............................................................. 19

Supply Decoupling ..................................................................... 19

Power-On Reset .......................................................................... 19

Mounting the AD7416/AD7417/AD7418 .............................. 19

Fan Controller............................................................................. 19

Thermostat .................................................................................. 19

System with Multiple AD7416 Devices ................................... 20

Outline Dimensions ....................................................................... 21

Ordering Guide .......................................................................... 22

Updated Outline Dimensions ....................................................... 21

Changes to Ordering Guide .......................................................... 23

8/2004—Rev. F to Rev. G

Changes to Figure 12...................................................................... 12

Changes to Reading Data from the AD7416/AD7417/AD7418

Section .............................................................................................. 13

Changes to Power-On-Reset section ........................................... 14

7/2003—Rev. E to Rev. F

Changes to Features Section ............................................................1

Changes to Specifications Section ...................................................3

Changes to Absolute Maximum Ratings Section ..........................6

Changes to Ordering Guide Section ...............................................6

Changes to Product Highlights Section .........................................7

Changes to Circuit Information Section ........................................7

Changes to Temperature Measurement Section............................9

10/2002—Rev. D to Rev. E

Changes to Specifications Headings ...............................................2

Added Temperature Measurement Section ...................................8

Changes to Serial Bus Address Section ....................................... 10

Changes to Figure 11...................................................................... 12

Changes to CONVST Pin Mode Section..................................... 14

Changes to Power-On-Reset Section ........................................... 14

Inserted Figure 16 and Figure 17; Renumbered Sequentially .. 15

Updated Outline Dimensions ....................................................... 16

REVISION HISTORY

4/2018—Rev. I to Rev. J

Changes to Product Title ................................................................. 1

Changes to Ordering Guide .......................................................... 22

11/2010—Rev. H to Rev. I

Changes to Figure 19 ...................................................................... 16

2/2009—Rev. G to Rev. H

Updated Format .................................................................. Universal

Changes to Data Sheet Title, Figure 2 and Figure 3 ..................... 1

Moved Product Highlights Section ................................................ 3

Changes to Table 1 ............................................................................ 4

Changes to Endnote 1, Table 2 ........................................................ 6

Added Figure 5 Caption................................................................... 7

Changes to Table 4 ............................................................................ 8

Changes to Table 5 and Table 6 ....................................................... 9

Changes to On-Chip Reference Section ...................................... 11

Changes to Figure 13 ...................................................................... 12

Changes to Table 8 and Table 10................................................... 13

Changes to Figure 15, Figure 16, and Figure 17 ......................... 15

Changes to Reading Data from the AD7416/AD7417/AD7418

Section, Figure 18, and Figure 19 ................................................. 16

Change to Mode 1 .......................................................................... 17

Changes to Figure 22 Caption and CONVST Pin Mode

Section .............................................................................................. 18

Moved Figure 21 and Figure 22 .................................................... 18

Changes to Power-On Reset Section ............................................ 19

Rev. J | Page 2 of 23

AD7417 Related Products

	AD7417	EVAL-AD7416EB	EVAL-AD7417EB	EVAL-AD7418EB	AD7418ACHIPS	AD7418AR	AD7418
Description	DIGITAL TEMP SENSOR-SERIAL, 10BIT(s), 3Cel, SURFACE MOUNT	DIGITAL TEMP SENSOR-SERIAL, 10BIT(s), 3Cel, SURFACE MOUNT	DIGITAL TEMP SENSOR-SERIAL, 10BIT(s), 3Cel, SURFACE MOUNT	DIGITAL TEMP SENSOR-SERIAL, 10BIT(s), 3Cel, SURFACE MOUNT	DIGITAL TEMP SENSOR-SERIAL, 10BIT(s), 3Cel, SURFACE MOUNT	DIGITAL TEMP SENSOR-SERIAL, 10BIT(s), 3Cel, SURFACE MOUNT	DIGITAL TEMP SENSOR-SERIAL, 10BIT(s), 3Cel, SURFACE MOUNT

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