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參數(shù)資料
| 型號： | G767 |
| 元件分類： | 溫度/濕度傳感器 |
| 英文描述： | ± 3oC Local / remote temperature sensor with SMBus interface.|Thermal Sensor / Detector Series |
| 中文描述： | ± 3oC本地/ SMBus接口與遠(yuǎn)程溫度傳感器。|熱傳感器/探測器系列 |
| 文件頁數(shù)： | 4/14頁 |
| 文件大?。?/td> | 323K |
| 代理商： | G767 |
Ver: 2.4
May 23, 2003
TEL: 886-3-5788833
http://www.gmt.com.tw
4
G767
Global Mixed-mode Technology Inc.
Pin Description
PIN
NAME
N.C.
FUNCTION
1,5,9,13,16
No Connection. Not internally connected. May be used for PC board trace routing
Supply Voltage Input , 3V to 5.5V. Bypass to GND with a 0.1μF capacitor. A 200
series resistor is
recommended but not required additional noise filtering.
Combined Current Source and A/D Positive Input for remote-diode channel. Do not leave DXP float-
ing; tie DXP to DXN if no remote diode is used. Place a 2200pF capacitor between DXP and DXN for
noise filtering.
Combined Current Sink and A/D Negative Input.
SMBus Address Select pin (Table 8). ADD0 and ADD1 are sampled upon power-up. Excess capaci-
tance (>50pF) at the address pins when floating may cause address-recognition problems.
Ground
SMBus Slave Address Select pin
SMBus Alert (interrupt) Output, open drain
SMBDATA SMBus Serial-Data Input / Output , open drain
SMBCLK SMBus Serial-Clock Input
Hardware Standby Input. Temperature and comparison threshold data are retained in standby mode.
Low = standby mode, high = operate mode.
2
Vcc
3
DXP
4
DXN
6
ADD1
7,8
10
11
12
14
GND
ADD0
ALERT
15
STBY
Detailed Description
The G767 is a temperature sensor designed to work in
conjunction with an external microcontroller (μC) or
other intelligence in thermostatic, process-control, or
monitoring applications. The μC is typically a
power-management or keyboard controller, generating
SMBus serial commands by “bit-banging” gen-
eral-purpose input-output (GPIO) pins or via a dedi-
cated SMBus interface block.
Essentially an 8-bit serial analog-to digital converter
(ADC) with a sophisticated front end, the G767 con-
tains a switched current source, a multiplexer, an ADC,
an SMBus interface, and associated control logic (Fig-
ure 1). Temperature data from the ADC is loaded into
two data registers, where it is automatically compared
with data previously stored in four over/under- tem-
perature alarm registers.
ADC and Multiplexer
The ADC is an averaging type that integrates over a
60ms period (each channel, typical), with excellent
noise rejection.
The multiplexer automatically steers bias currents
through the remote and local diodes, measures their
forward voltages, and computes their temperatures.
Both channels are automatically converted once the
conversion process has started, either in free-running
or single-shot mode. If one of the two channels is not
used, the device still performs both measurements,
and the user can simply ignore the results of the un-
used channel. If the remote diode channel is unused,
tie DXP to DXN rather than leaving the pins open.
The worst-case DXP-DXN differential input voltage
range is 0.25V to 0.95V.
Excess resistance in series with the remote diode
causes about +1/2°C error per ohm. Likewise, 200μV
of offset voltage forced on DXP-DXN causes about
1°C error.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| G767F | 制造商:GMT 制造商全稱:Global Mixed-mode Technology Inc 功能描述:Remote/Local Temperature Sensor with SMBus Serial Interface |
| G768 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Remote/Local Temperature Sensor, 2 Fan Controllers with SMBus Serial Interface and System Reset Circuit |
| G768193-3 | 制造商:Glenair Inc 功能描述: |
| G768194-5 | 制造商:Glenair Inc 功能描述: |
| G768194-6 | 制造商:Glenair Inc 功能描述: |
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