Datasheet > G751-2P1F

G751-2P1F

更新时间： 2023-07-15 00:00:00

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致新 - GMT		/
页数	文件大小	规格书
12页	258K
描述
Sensor/Transducer, 8 Pin, Plastic/epoxy

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G751-2P1F 数据手册

Global Mixed-mode Technology Inc.

G751

Shutdown Mode

Shutdown mode is enabled by setting the shutdown

bit in the Configuration register via the SMBus. Shut-

down mode reduces power supply current to 1µA

typical. In interrupt mode O.S. is reset if previously

set and is undefined in Compatator mode during

shutdown. The SMBus interface remains active. Ac-

tivity on the clock and data lines of the SMBus may

slightly increase shutdown mode quiescent current.

T_OS, T_HYST, and Configuration registers can be read

from and written to in shutdown mode.

Fault Queue

A fault queue of up to 6 faults is provided to prevent

false tripping of O.S. when the G751 is used in noisy

environments. The number of faults set in the queue

must occur consecutively to set the O.S. output.

Comparator/Interrupt Mode

As indicated in the O.S. Output Temperature Re-

sponse Diagram, Figure 1, the events that trigger

O.S. are identical for either Comparator or Interrupt

mode. The most important difference is that in Inter-

rupt mode the O.S. will remain set indefinitely once it

has been set. To reset O.S. while in Interrupt mode,

perform a read from any register in the G751.

O.S. Output

The O.S. output is an open-drain output and does

not have an internal pull-up. A ”high” level will not be

observed on this pin until pull-up current is provided

from some external source, typically a pull-up resis-

tor. Choice of resistor value depends on many sys-

tem factors but, in general, the pull-up resistor

should be as large as possible. This will minimize

any errors due to internal heating of the G751. The

maximum resistance of the pull up, based on G751

specification for High Level Output Current, to pro-

vide a 2V high level, is 30kΩ.

Figure1 O.S. Output Temperature Response Dia-

gram

Temperature Data Format

Temperature data can be read from the Temperature,

T_OSSet Point, and T_HYSTSet Point registers; and

written to the T_OSSet Point, and T_HYSTSet Point reg-

isters. Temperature data is represented

by a 9-bit, two’s complement word with an LSB

(Least Significant Bit) equal to 0.5°C:

O.S. Polarity

The O.S. output can be programmed via the con-

figuration register to be either active low (default

mode), or active high. In active low mode the O.S.

output goes low when triggered exactly as shown on

the O.S. Output Temperature Response Diagram,

Figure 1. Active high simply inverts the polarity of the

O.S. output.

DIGITAL OUTPUT

TEMPERATURE

BINARY

HEX

0FAh

032h

001h

000h

1FFh

1CEh

192h

+125°C

+25°C

+0.5°C

0°C

0 1111 1010

0 0011 0010

0 0000 0001

0 0000 0000

1 1111 1111

1 1100 1110

1 1001 0010

-0.5°C

-25°C

-55°C

TEL: 886-3-5788833

http://www.gmt.com.tw

Ver: 2.7

Dec 26, 2005

1 2 3 456 7 8...12

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