參數(shù)資料
型號(hào)： ADT7317ARQ
廠商： Analog Devices, Inc.
元件分類： 圓形連接器
英文描述： Circular Connector; No. of Contacts:37; Series:LJT07R; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:15; Circular Contact Gender:Pin; Circular Shell Style:Jam Nut Receptacle; Insert Arrangement:15-35
中文描述： SPI/I2C兼容，10位數(shù)字溫度傳感器和四DAC的電壓輸出12/10/8-Bit
文件頁(yè)數(shù)： 13/32頁(yè)
文件大?。?/td> 340K
代理商： ADT7317ARQ
ADT7316/7317/7318
–
13
–
REV. PrN
PRELIMINARY TECHNICAL DATA
FUNCTIONAL DESCRIPTION - DAC
The ADT7316/7317/7318 has quad resistor-string DACs
fabricated on a CMOS process with a resolutions of 12,
10 and 8 bits respectively. They contain four output buffer
amplifiers and is written to via I
2
C serial interface or SPI
serial interface. See Serial Interface Selection section for
more information.
The ADT7316/7317/7318 operates from a single supply
of 2.7 V to 5.5 V and the output buffer amplifiers provide
rail-to-rail output swing with a slew rate of 0.7V/
μ
s.
DACs A and B share a common reference input, namely
V
REF
AB. DACs C and D share a common reference input,
namely V
REF
CD. Each reference input may be buffered to
draw virtually no current from the reference source, or
unbuffered to give a reference input range from GND to
V
DD
. The devices have a power-down mode, in which all
DACs may be turned off completely with a high-imped-
ance output.
Each DAC output will not be updated until it receives the
LDAC command. Therefore while the DAC registers
would have been written to with a new value, this value
will not be represented by a voltage output until the DACs
have received the LDAC command. Reading back from
any DAC register prior to issuing an LDAC command
will result in the digital value that corresponds to the
DAC output voltage. Thus the digital value written to the
DAC register cannot be read back until after the LDAC
command has been initiated. This LDAC command can
be given by either pulling the
Bits D4 and D5 of DAC Configuration register(Address =
1Bh) or using the LDAC register(Address = 1Ch).
Digital-to-Analog Section
The architecture of one DAC channel consists of a resis-
tor-string DAC followed by an output buffer amplifier.
The voltage at the V
REF
pin or the on-chip reference of
2.25 V provides the reference voltage for the correspond-
ing DAC. Figure 7 shows a block diagram of the DAC
architecture. Since the input coding to the DAC is straight
binary, the ideal output voltage is given by:
V
REF
* D
V
OUT
= ----------
2
N
where D=decimal equivalent of the binary code which is
loaded to the DAC register;
0-255 for ADT7318 (8-Bits)
0-1023 for ADT7317 (10-Bits)
0-4095 for ADT7316 (12-Bits)
N = DAC resolution.
pin low, setting up
V
REF
AB
Int V
REF
REFERENCE
BUFFER
BUF
GAIN MODE
(GAIN=1 OR 2)
V
OUT
A
OUTPUT BUFFER
AMPLIFIER
RESISTOR
STRING
DAC
REGISTER
INPUT
REGISTER
Figure 7. Single DAC channel architecture
Resistor String
The resistor string section is shown in Figure 9. It is sim-
ply a string of resistors, each of value R. The digital code
loaded to the DAC register determines at what node on
the string the voltage is tapped off to be fed into the out-
put amplifier. The voltage is tapped off by closing one of
the switches connecting the string to the amplifier. Be-
cause it is a string of resistors, it is guaranteed monotonic.
DAC Reference Inputs
There is a reference pin for each pair of DACs. The refer-
ence inputs are buffered but can also be individually con-
figured as unbuffered.
2.25 V
Internal V
R EF
STRING
DAC A
STRING
DAC B
V
REF
-AB
Figure 8. DAC Reference Buffer Circuit
The advantage with the buffered input is the high imped-
ance it presents to the voltage source driving it. However
if the unbuffered mode is used, the user can have a refer-
ence voltage as low as 0.25 V and as high as V
DD
since
there is no restriction due to headroom and footroom of
the reference amplifier.
相關(guān)PDF資料
PDF描述
ADT7318 Circular Connector; No. of Contacts:37; Series:LJT07R; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:15; Circular Contact Gender:Pin; Circular Shell Style:Jam Nut Receptacle; Insert Arrangement:15-35
ADT7318ARQ Circular Connector; No. of Contacts:37; Series:LJT07R; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:15; Circular Contact Gender:Pin; Circular Shell Style:Jam Nut Receptacle; Insert Arrangement:15-35
ADT7411 SPI/I2C compatible，10-bit digital temperature sensor and 8-channel ADC
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ADT7411ARQ-REEL Circular Connector; No. of Contacts:26; Series:LJT07R; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:17; Circular Contact Gender:Pin; Circular Shell Style:Jam Nut Receptacle; Insert Arrangement:17-26
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ADT7317ARQ-REEL 制造商:Analog Devices 功能描述:Digital Temperature Sensor 16-Pin QSOP T/R 制造商:Rochester Electronics LLC 功能描述:DTS, 10-BIT QUAD VOLTAGE OUTPUT DAC I.C. - Tape and Reel
ADT7317ARQ-REEL7 制造商:Analog Devices 功能描述:Digital Temperature Sensor 16-Pin QSOP T/R 制造商:Rochester Electronics LLC 功能描述:DTS, 10-BIT QUAD VOLTAGE OUTPUT DAC I.C. - Tape and Reel
ADT7317ARQZ 功能描述:IC SENSOR TEMP QUAD DAC 16QSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 熱管理 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:SilentSense™ 功能:溫度監(jiān)控系統(tǒng)（傳感器） 傳感器類型:內(nèi)部和外部 感應(yīng)溫度:-55°C ~ 125°C，外部傳感器 精確度:±2°C 本地（最大），±3°C 遠(yuǎn)程（最大） 拓?fù)?ADC（三角積分型），比較器，寄存器庫(kù) 輸出類型:I²C?/SMBus? 輸出警報(bào):是 輸出風(fēng)扇:是 電源電壓:2.7 V ~ 5.5 V 工作溫度:-55°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:8-MSOP 包裝:帶卷 (TR) 其它名稱:MIC284-2BMMTRMIC284-2BMMTR-ND
ADT7317ARQZ-REEL 功能描述:IC SENSOR TEMP QUAD DAC 16QSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 熱管理 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:SilentSense™ 功能:溫度監(jiān)控系統(tǒng)（傳感器） 傳感器類型:內(nèi)部和外部 感應(yīng)溫度:-55°C ~ 125°C，外部傳感器 精確度:±2°C 本地（最大），±3°C 遠(yuǎn)程（最大） 拓?fù)?ADC（三角積分型），比較器，寄存器庫(kù) 輸出類型:I²C?/SMBus? 輸出警報(bào):是 輸出風(fēng)扇:是 電源電壓:2.7 V ~ 5.5 V 工作溫度:-55°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:8-MSOP 包裝:帶卷 (TR) 其它名稱:MIC284-2BMMTRMIC284-2BMMTR-ND
ADT7317ARQZ-REEL7 功能描述:IC SENSOR TEMP QUAD DAC 16QSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 熱管理 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:SilentSense™ 功能:溫度監(jiān)控系統(tǒng)（傳感器） 傳感器類型:內(nèi)部和外部 感應(yīng)溫度:-55°C ~ 125°C，外部傳感器 精確度:±2°C 本地（最大），±3°C 遠(yuǎn)程（最大） 拓?fù)?ADC（三角積分型），比較器，寄存器庫(kù) 輸出類型:I²C?/SMBus? 輸出警報(bào):是 輸出風(fēng)扇:是 電源電壓:2.7 V ~ 5.5 V 工作溫度:-55°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:8-MSOP 包裝:帶卷 (TR) 其它名稱:MIC284-2BMMTRMIC284-2BMMTR-ND
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