MAX6692MUA Просмотр технического описания (PDF) - Maxim Integrated

Номер в каталоге

Компоненты Описание

производитель

MAX6692MUA

Precision SMBus-Compatible Remote/Local Temperature Sensors with Overtemperature Alarms

Maxim Integrated 

Precision SMBus-Compatible Remote/Local

Temperature Sensors with Overtemperature Alarms

Table 7. Status Register Bit Assignments (02h)

BIT NAME

7 (MSB) BUSY

6

LHIGH

5

LLOW

4

RHIGH

3

RLOW

2

FAULT

1

EOT

0

IOT

POR

STATE

0

0

0

0

0

0

0

0

FUNCTION

A/D is busy converting when 1.

Local (internal) high-temperature alarm has tripped when 1; cleared by POR or readout of the

status byte if the fault condition no longer exists.

Local (internal) low-temperature alarm has tripped when 1; cleared by POR or readout of the

status byte if the fault condition no longer exists.

Remote (external) high-temperature alarm has tripped when 1; cleared by POR or readout of the

status byte if the fault condition no longer exists.

Remote (external) low-temperature alarm has tripped when 1; cleared by POR or readout of the

status byte if the fault condition no longer exists.

A 1 indicates DXN and DXP are either shorted or open; cleared by POR or readout of the status

byte if the fault condition no longer exists.

A 1 indicates the remote (external) junction temperature exceeds the external OVERT threshold.

A 1 indicates the local (internal) junction temperature exceeds the internal OVERT threshold.

clears the memory if VCC falls below 2.0V (typ). When

power is first applied and VCC rises above 2.0V (typ),

the logic blocks begin operating, although reads and

writes at VCC levels below 3V are not recommended. A

second VCC comparator, the ADC UVLO comparator

prevents the ADC from converting until there is suffi-

cient headroom (VCC = 2.8V typ).

Power-up defaults include:

Power-Up Defaults

• Interrupt latch is cleared.

• ADC begins autoconverting at a 4Hz rate.

• Command byte is set to 00h to facilitate quick local

temperature receive byte queries.

• Local (internal) THIGH limit set to +85°C.

• Local (internal) TLOW limit set to 0°C.

• Remote (external) THIGH limit set to +85°C.

• Remote (external) TLOW limit set to 0°C.

• OVERT internal limit is set to +85°C; every external

limit is set to +110°C (MAX6648).

• OVERT limits are set to +85°C (MAX6692).

Table 8. Conversion-Rate Control Byte

(04h)

DATA

00h

01h

02h

03h

04h

05h

06h

07h

08h-FFh

CONVERSION

RATE (Hz)

0.0625

0.125

0.25

0.5

1

2

4

4

Reserved

Applications Information

Remote-Diode Selection

The MAX6648/MAX6692 can directly measure the die

temperature of CPUs and other ICs that have on-board

temperature-sensing diodes (see Typical Operating

Circuit), or they can measure the temperature of a dis-

crete diode-connected transistor.

Effect of Ideality Factor

The accuracy of the remote temperature measurements

depends on the ideality factor (n) of the remote “diode”

______________________________________________________________________________________ 11

Share Link: