Rainbow-electronics MAX1299 Manual de usuario descargar pdf (Pagina 1)

General Description

The MAX1298/MAX1299 implement local and remote

temperature sensing with 12-bit resolution, using +5V

and +3V supply voltages, respectively. Accuracy is

±1°C from 0 to +70°C, with no calibration needed. The

devices feature an algorithmic switched-capacitor ana-

log-to-digital converter (ADC), an on-chip clock, and a

3-wire serial interface compatible with SPI™, QSPI™,

and MICROWIRE™.

The MAX1298/MAX1299 also perform fully differential

voltage measurements with 12-bit resolution and sepa-

rate track-and-hold (T/H) for positive and negative

inputs. Both devices accept versatile input modes con-

sisting of two 3-channel signal pairs, five 1-channel sig-

nals relative to a floating common, or V

/4 relative to

ground. An external reference may be used for more

accurate voltage measurements.

Typical power consumption is only 1.3mW (MAX1299).

A shutdown mode and two standby modes provide

multiple strategies for prolonging battery life in portable

applications that require limited sampling throughput.

The MAX1298/MAX1299 are available in 16-pin SSOP

packages.

________________________Applications

Temperature/Voltage Supervision of

Workstations and Communications Equipment

Hand-Held Instruments

Medical Equipment

Industrial Process Control

Features

♦ Local and Remote Temperature Sensing

♦ 12-Bit Resolution for Temperature and Voltage

Inputs

♦ ±1°C Accuracy from -40°C to +85°C

♦ Fully Differential Inputs

♦ Single-Supply Operation

+4.75V to +5.25V (MAX1298)

+2.7V to +3.6V (MAX1299)

♦ 3-Wire SPI/QSPI/MICROWIRE-Compatible

Interface

♦ Internal Precision Voltage Reference

2.50V (MAX1298)

1.20V (MAX1299)

♦ Space-Saving 16-Pin SSOP Package

MAX1298/MAX1299

12-Bit Serial-Output Temperature Sensors

with 5-Channel ADC

________________________________________________________________ Maxim Integrated Products 1

AIN1 AIN0

AIN5

REF

GND

SCLK

DIN

DOUT

TOP VIEW

MAX1298

MAX1299

SSOP

SHO

AIN2

GND

AIN3

AIN4

SSTRB

Pin Configuration

19-1726; Rev 0; 5/00

For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.

For small orders, phone 1-800-835-8769.

Ordering Information

*Future product—contact factory for availability.

Typical Operating Circuit appears at end of data sheet.

SPI and QSPI are trademarks of Motorola, Inc.

MICROWIRE is a trademark of National Semiconductor Corp.

PART

TEMP.

RANGE

PIN-

PACKAGE

TEMP. SENSE

ACCURACY

(°C)

MAX1298AEAE

-40°C to +85°C 16 SSOP

±0.75

MAX1298BEAE*

-40°C to +85°C 16 SSOP

±1.0

MAX1298CEAE

-40°C to +85°C 16 SSOP

±4.0

MAX1299AEAE

-40°C to +85°C 16 SSOP

±0.75

MAX1299BEAE*

-40°C to +85°C 16 SSOP

±1.0

MAX1299CEAE

-40°C to +85°C 16 SSOP

±4.0

1 2 3 4 5 6 ... 19 20

MAX1298/MAX1299 1

Indice de contenidos

Pagina 1 - MAX1298/MAX1299

General DescriptionThe MAX1298/MAX1299 implement local and remotetemperature sensing with 12-bit resolution, using +5Vand +3V supply voltages, respect

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MAX1298/MAX129912-Bit Serial-Output Temperature Sensors with 5-Channel ADC10 _________________________________________________________________________

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MAX1298/MAX129912-Bit Serial-Output Temperature Sensors with 5-Channel ADC____________________________________________________________________________

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MAX1298/MAX129912-Bit Serial-Output Temperature Sensors with 5-Channel ADC12 _________________________________________________________________________

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13 fCLKsWARMUP44 fCLKsCONVERTIONCYCLES 2–12REFERENCESAMPLING3 fCLKsSUBTRACTIONAND WRITE TOOUTPUT REGISTER48 fCLKsCONVERTION CYCLES 1–1213 fCLKsWARMUPI

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MAX1298/MAX129912-Bit Serial-Output Temperature Sensors with 5-Channel ADC14 _________________________________________________________________________

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MAX1298/MAX129912-Bit Serial-Output Temperature Sensors with 5-Channel ADC____________________________________________________________________________

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MAX1298/MAX129912-Bit Serial-Output Temperature Sensors with 5-Channel ADC16 _________________________________________________________________________

Pagina 9

The transistor must be a small-signal type with a baseresistance less than 100Ω. Tight specifications for for-ward current gain (+50 to +150, for exam

Pagina 10

MAX1298/MAX1299Layout, Grounding, and BypassingFor best performance, use PC boards. Do not use wire-wrap boards. Board layout should ensure that digit

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MAX1298/MAX129912-Bit Serial-Output Temperature Sensors with 5-Channel ADC____________________________________________________________________________

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MAX1298/MAX129912-Bit Serial-Output Temperature Sensors with 5-Channel ADC2 __________________________________________________________________________

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MAX1298/MAX129912-Bit Serial-Output Temperature Sensors with 5-Channel ADCMaxim cannot assume responsibility for use of any circuitry other than circu

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MAX1298/MAX129912-Bit Serial-Output Temperature Sensors with 5-Channel ADC____________________________________________________________________________

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MAX1298/MAX129912-Bit Serial-Output Temperature Sensors with 5-Channel ADC4 __________________________________________________________________________

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MAX1298/MAX129912-Bit Serial-Output Temperature Sensors with 5-Channel ADC____________________________________________________________________________

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MAX1298/MAX129912-Bit Serial-Output Temperature Sensors with 5-Channel ADC6 __________________________________________________________________________

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MAX1298/MAX129912-Bit Serial-Output Temperature Sensors with 5-Channel ADC____________________________________________________________________________

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MAX1298/MAX129912-Bit Serial-Output Temperature Sensors with 5-Channel ADC8 __________________________________________________________________________

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MAX1298/MAX129912-Bit Serial-Output Temperature Sensors with 5-Channel ADC____________________________________________________________________________

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