參數(shù)資料
型號： LTC1290DIN#TR
廠商： LINEAR TECHNOLOGY CORP
元件分類： ADC
英文描述： 8-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDIP20
封裝： 0.300 INCH, PLASTIC, DIP-20
文件頁數(shù)： 18/32頁
文件大?。?/td> 613K
代理商： LTC1290DIN#TR
25
LTC1290
1290fe
U
S
A
O
PPLICATI
WU
U
I FOR ATIO
How the various power supplies to the LTC1290 are
applied can also lead to overvoltage conditions. For single
supply operation (i.e., unipolar mode), if VCC and REF+ are
not tied together, then VCC should be turned on first, then
REF+. If this sequence cannot be met, connecting a diode
from REF+ to VCC is recommended (see Figure 21).
For dual supplies (bipolar mode) placing two Schottky
diodes from VCC and V– to ground (Figure 23) will prevent
power supply reversal from occurring when an input
source is applied to the analog MUX before power is
applied to the device. Power supply reversal occurs, for
example, if the input is pulled below V– then VCC will pull
a diode drop below ground which could cause the device
not to power up properly. Likewise, if the input is pulled
above VCC then V– will be pulled a diode drop above
ground. If no inputs are present on the MUX, the Schottky
diodes are not required if V– is applied first, then VCC.
Because a unique input protection structure is used on the
digital input pins, the signal levels on these pins can
exceed the device VCC without damaging the device.
5V
1290 F21
REF+
VCC
LTC1290
22
F
1N4148
VREF
14
20
5V
1290 F22
DGND
V –
AGND
VCC
LTC1290
–5V
0.1
F
22
F
1N5817
Figure 21
Figure 22. Power Supply Reversal
Figure 20. Overvoltage Protection for MUX
5V
1290 F20
DGND
V–
AGND
VCC
1k
LTC1290
CH0
VIN
–5V
0.1
F
22
F
相關(guān)PDF資料
PDF描述
LTC1290DIJ#PBF 8-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, CDIP20
LTC1290BIJ#TRPBF 8-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, CDIP20
LTC1290DIJ#TR 8-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, CDIP20
LTC1290CIJ#PBF 8-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, CDIP20
LTC1290DMJ#TR 8-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, CDIP20
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC1290DISW 功能描述:IC DATA ACQ SYS 12BIT 20-SOIC RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - ADCs/DAC - 專用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:50 系列:- 類型:數(shù)據(jù)采集系統(tǒng)（DAS） 分辨率（位）:16 b 采樣率（每秒）:21.94k 數(shù)據(jù)接口:MICROWIRE?，QSPI?，串行，SPI? 電壓電源:模擬和數(shù)字 電源電壓:1.8 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:40-TQFN-EP（6x6） 包裝:托盤
LTC1290DISW#PBF 功能描述:IC DATA ACQ SYS 12BIT 20-SOIC RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - ADCs/DAC - 專用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:50 系列:- 類型:數(shù)據(jù)采集系統(tǒng)（DAS） 分辨率（位）:16 b 采樣率（每秒）:21.94k 數(shù)據(jù)接口:MICROWIRE?，QSPI?，串行，SPI? 電壓電源:模擬和數(shù)字 電源電壓:1.8 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:40-TQFN-EP（6x6） 包裝:托盤
LTC1290DISW#TR 功能描述:IC DATA ACQ SYS 12BIT 5V 20SOIC RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - ADCs/DAC - 專用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:50 系列:- 類型:數(shù)據(jù)采集系統(tǒng)（DAS） 分辨率（位）:16 b 采樣率（每秒）:21.94k 數(shù)據(jù)接口:MICROWIRE?，QSPI?，串行，SPI? 電壓電源:模擬和數(shù)字 電源電壓:1.8 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:40-TQFN-EP（6x6） 包裝:托盤
LTC1290DISW#TRPBF 功能描述:IC DATA ACQ SYS 12BIT 20-SOIC RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - ADCs/DAC - 專用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:50 系列:- 類型:數(shù)據(jù)采集系統(tǒng)（DAS） 分辨率（位）:16 b 采樣率（每秒）:21.94k 數(shù)據(jù)接口:MICROWIRE?，QSPI?，串行，SPI? 電壓電源:模擬和數(shù)字 電源電壓:1.8 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:40-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:40-TQFN-EP（6x6） 包裝:托盤
LTC1290DMJ 制造商:Linear Technology 功能描述:ADC Single SAR 50ksps 12-bit Serial 20-Pin CDIP
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