Rainbow-electronics MAX1619 Manual do Utilizador

Consulte online ou descarregue Manual do Utilizador para Sensores Rainbow-electronics MAX1619. Rainbow Electronics MAX1619 User Manual Manual do Utilizador

  • Descarregar
  • Adicionar aos meus manuais
  • Imprimir
  • Página
    / 20
  • Índice
  • MARCADORES
  • Avaliado. / 5. Com base em avaliações de clientes
Vista de página 0
________________General Description
The MAX1619 is a precise digital thermometer that reports
the temperature of both a remote sensor and its own
package. The remote sensor is a diode-connected transis-
tor—typically a low-cost, easily mounted 2N3904 NPN
type—that replaces conventional thermistors or thermo-
couples. Remote accuracy is ±3°C for multiple transistor
manufacturers, with no calibration needed. The remote
channel can also measure the die temperature of other
ICs, such as microprocessors, that contain an on-chip,
diode-connected transistor.
The 2-wire serial interface accepts standard System
Management Bus (SMBus
®
) Write Byte, Read Byte, Send
Byte, and Receive Byte commands to program the alarm
thresholds and to read temperature data. The data format
is 7 bits plus sign, with each bit corresponding to 1°C, in
two’s complement format. Measurements can be done
automatically and autonomously, with the conversion rate
programmed by the user or programmed to operate in a
single-shot mode. The adjustable rate allows the user to
control the supply-current drain.
The MAX1619 is nearly identical to the popular MAX1617A,
with the additional feature of an overtemperature alarm out-
put (OVERT) that responds to the remote temperature; this
is optimal for fan control.
________________________Applications
Desktop and Notebook Central Office
Computers Telecom Equipment
Smart Battery Packs Test and Measurement
LAN Servers Multichip Modules
Industrial Controls
____________________________Features
Two Channels Measure Both Remote and Local
Temperatures
No Calibration Required
SMBus 2-Wire Serial Interface
Programmable Under/Overtemperature Alarms
OVERT Output for Fan Control
Supports SMBus Alert Response
Supports Manufacturer and Device ID Codes
Accuracy
±2°C (+60°C to +100°C, local)
±3°C (-40°C to +125°C, local)
±3°C (+60°C to +100°C, remote)
3µA (typ) Standby Supply Current
70µA (max) Supply Current in Auto-Convert Mode
+3V to +5.5V Supply Range
Write-Once Protection
Small 16-Pin QSOP Package
MAX1619
Remote/Local Temperature Sensor with Dual-
Alarm Outputs and SMBus Serial Interface
________________________________________________________________
Maxim Integrated Products
1
MAX1619
SMBCLK
ADD0 ADD1
V
CC
STBY
GND
ALERT
SMBDATA
DXP
DXN
INTERRUPT
TO µC
FAN
CONTROL
+3V TO +5.5V
200
0.1µF
CLOCK
10k EACH
DATA
2N3904
2200pF
OVERT
___________________Pin Configuration
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
V
CC
N.C.
STBY
SMBCLK
N.C.
SMBDATA
ALERT
ADD0
OVERT
TOP VIEW
MAX1619
QSOP
GND
DXP
ADD1
DXN
N.C.
GND
GND
Typical Operating Circuit
19-1483; Rev 0; 4/99
PART
MAX1619MEE -55°C to +125°C
TEMP. RANGE PIN-PACKAGE
16 QSOP
Ordering Information
SMBus is a registered trademark of Intel Corp.
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
Vista de página 0
1 2 3 4 5 6 ... 19 20

Resumo do Conteúdo

Página 1 - Maxim Integrated Products

________________General DescriptionThe MAX1619 is a precise digital thermometer that reportsthe temperature of both a remote sensor and its ownpackage

Página 2 - ELECTRICAL CHARACTERISTICS

the MAX1619 can be forced to perform A/D conversionsvia the one-shot command, despite the RUN/STOP bitbeing high.Activate hardware standby mode by for

Página 3

tems, since a second master could overwrite the com-mand byte without informing the first master. The temperature data format is 7 bits plus sign in t

Página 4 - Remote Diode Selection

If the remote channel is shorted (DXP to DXN or DXP toGND), the ADC reads 0000 0000 so as not to trip eitherthe THIGHor TLOWalarms at their POR settin

Página 5 - SUPPLY CURRENT (µA)

MAX1619Remote/Local Temperature Sensor with Dual-Alarm Outputs and SMBus Serial Interface_____________________________________________________________

Página 6 - Detailed Description

MAX1619Remote/Local Temperature Sensor with Dual-Alarm Outputs and SMBus Serial Interface14 __________________________________________________________

Página 7 - Figure 1. Functional Diagram

The address pin states are checked at POR and SPORonly, and the address data stays latched to reduce qui-escent supply current due to the bias current

Página 8 - Manufacturers

MAX1619Remote/Local Temperature Sensor with Dual-Alarm Outputs and SMBus Serial Interface16 __________________________________________________________

Página 9 - Low-Power Standby Mode

MAX1619Remote/Local Temperature Sensor with Dual-Alarm Outputs and SMBus Serial Interface_____________________________________________________________

Página 10 - SMBus Digital Interface

MAX1619Remote/Local Temperature Sensor with Dual-Alarm Outputs and SMBus Serial Interface18 __________________________________________________________

Página 11 - OOVVEERRTT

MAX1619Remote/Local Temperature Sensor with Dual-Alarm Outputs and SMBus Serial Interface_____________________________________________________________

Página 12 - Address (0001100)

MAX1619Remote/Local Temperature Sensor with Dual-Alarm Outputs and SMBus Serial Interface2 ___________________________________________________________

Página 13

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses arei

Página 14 - Slave Addresses

MAX1619Remote/Local Temperature Sensor with Dual-Alarm Outputs and SMBus Serial Interface_____________________________________________________________

Página 15 - (ADD0 and ADD1)

06391250 5k 500k50k 5M500 50MTEMPERATURE ERROR vs.POWER-SUPPLY NOISE FREQUENCYMAX1619-03FREQUENCY (Hz)TEMPERATURE ERROR (°C)VIN = SQUARE WAVE APPLIED

Página 16

MAX1619Remote/Local Temperature Sensor with Dual-Alarm Outputs and SMBus Serial Interface_____________________________________________________________

Página 17

MAX1619Remote/Local Temperature Sensor with Dual-Alarm Outputs and SMBus Serial Interface6 ___________________________________________________________

Página 18

MAX1619Remote/Local Temperature Sensor with Dual-Alarm Outputs and SMBus Serial Interface_____________________________________________________________

Página 19 - Chip Information

A/D Conversion SequenceIf a Start command is written (or generated automatical-ly in the free-running auto-convert mode), both channelsare converted,

Página 20 - Package Information

PC Board Layout1) Place the MAX1619 as close as practical to theremote diode. In a noisy environment, such as acomputer motherboard, this distance can

Comentários a estes Manuais

Sem comentários