ADT7316 datasheet(1/32 Pages) AD

部件名	ADT7316

功能描述	SPI/I2C Compatible, 10-Bit Digital Temperature Sensor and Quad Voltage Output 12/10/8-Bit DAC

PDF	32 Pages

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制造商	AD [Analog Devices]

网页	http://www.analog.com

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1 / 32 page

ADT7316/7317/7318

=

REV. PrN 02/02

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

which may result from its use. No license is granted by implication or

otherwise under any patent or patent rights of Analog Devices.

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

Tel: 781/329-4700

www.analog.com

Fax: 781/326-8703

Analog Devices, Inc., 200

2

SPI/I

2C



 Compatible, 10-Bit Digital Temperature

Sensor and Quad Voltage Output 12/10/8-Bit DAC

Preliminary Technical Data

PRELIMINARY TECHNICAL DATA

FEATURES

ADT7316 - Four 12-Bit DACs

ADT7317 - Four 10-Bit DACs

ADT7318 - Four 8-Bit DACs

Buffered Voltage Output

Guaranteed Monotonic By Design Over All Codes

10-Bit Temperature to Digital Converter

Temperature range:

-40

oC to +125oC

Temperature Sensor Accuracy of ±0.5oC

Supply Range : + 2.7 V to + 5.5 V

DAC Output Range: 0 - 2VREF

Power-Down Current 1

µµµµµA

Internal 2.25 VRef Option

Double-Buffered Input Logic

Buffered / Unbuffered Reference Input Option

Power-on Reset to Zero Volts

Simultaneous Update of Outputs (

LDAC Function)

On-Chip Rail-to-Rail Output Buffer Amplifier

I2C



, SPITM, QSPITM, MICROWIRETM and DSP-Compatible 4-

wire Serial Interface

16-Lead QSOP Package

APPLICATIONS

Portable Battery Powered Instruments

Personal Computers

Telecommunications Systems

Electronic Test Equipment

Domestic Appliances

Process Control

GENERAL DESCRIPTION

The ADT7316/7317/7318 combines a 10-Bit Tempera-

ture-to-Digital Converter and a quad 12/10/8-Bit DAC

respectively, in a 16-Lead QSOP package. This includes a

bandgap temperature sensor and a 10-bit ADC to monitor

and digitize the temperature reading to a resolution of

0.25

oC. The ADT7316/17/18 operates from a single

+2.7V to +5.5V supply. The output voltage of the DAC

ranges from 0 V to 2VREF , with an output voltage settling

time of typ 7 msec. The ADT7316/17/18 provides two

serial interface options, a four-wire serial interface which

is compatible with SPI

TM, QSPITM, MICROWIRETM and

DSP interface standards; and a two-wire I

2C interface. It

features a standby mode that is controlled via the serial

interface.

The reference for the four DACs is derived either inter-

nally or from two reference pins (one per DAC pair) .The

outputs of all DACs may be updated simultaneously using

the software LDAC function or external LDAC pin. The

ADT7316/7317/7318 incorporates a power-on-reset cir-

cuit, which ensures that the DAC output powers-up to

zero volts and it remains there until a valid write takes

place.

The ADT7316/7317/7318’s wide supply voltage range,

low supply current and SPI/I

2C-compatible interface,

make it ideal for a variety of applications, including per-

sonal computers, office equipment and domestic appli-

ances.

I

2C is a registered trademark of Philips Corporation

* Protected by U.S. Patent No. 5,969,657; other patents pending.

SPI and QSPI are trademarks of Motorola, INC.

MICROWIRE is a trademark of National Semiconductor Corporation.

FUNCTIONAL BLOCK DIAGRAM

V

DD

VA LUE

REGISTER

STRING

DA C B

EXTERNA L TEMPERATURE

VALUE REGISTER

A-TO-D

CONVERTER

INTERNAL TEMPERATURE

VA LUE REGISTER

ON-CHIP

TEMPERA TURE

SENSOR

ANAL OG

MUX

LIMIT

COMPARATOR

DAC C

REGISTERS

ADDRESS POINTER

REGISTER

T

HIGH LIM IT

REGISTERS

T

LOW LIM IT

REGISTERS

V

DD Lim i t

REGISTERS

CONTROL CONFIG . 1

REGISTER

CONTROL CONFIG . 3

REGISTER

CONTROL CONFIG. 2

REGISTER

DA C CONFIGURATION

REGISTER

L DA C CONFIGURATION

REGISTER

INTERRUPT MASK

REGISTERS

DAC A

REGISTERS

DA C B

REG ISTERS

DAC D

REGISTERS

STRING

DAC A

STRING

DA C C

STRING

DA C D

GAIN

SELECT

LO GIC

POWER

DOWN

L OGIC

V

OUT-A

V

OUT-B

V

OUT-C

V

OUT-D

D+

D-

SMB us/SPI INTERFACE

CS SCL/SCL K SDA /DIN DOUT/ADD

INTERRUPT

STA TUS

REGISTERS

V

DD

SENSOR

V

DD

GND

INTERNAL TEMP

SENSOR

VREF-A B

VREF-CD

LDAC

ADT7316/17/18

7

8

6

5

4

13

12

11

9

3

14

10

15

16

1

2

类似零件编号 - ADT7316

制造商	部件名	数据表	功能描述
Analog Devices	ADT7316ARQ	3Mb / 44P	Accurate Digital Temperature Sensor REV. B
	ADT7316ARQ-REEL	3Mb / 44P	Accurate Digital Temperature Sensor REV. B
	ADT7316ARQ-REEL7	3Mb / 44P	Accurate Digital Temperature Sensor REV. B
	ADT7316ARQZ	3Mb / 44P	Accurate Digital Temperature Sensor REV. B
	ADT7316ARQZ-REEL	3Mb / 44P	Accurate Digital Temperature Sensor REV. B

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类似说明 - ADT7316

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