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參數(shù)資料
| 型號： | LTC1290CISW |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | ADC |
| 英文描述： | Single Chip 12-Bit Data Acquisition System |
| 中文描述： | 8-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO20 |
| 封裝： | 0.300 INCH, PLASTIC, SOP-20 |
| 文件頁數(shù)： | 24/28頁 |
| 文件大小： | 381K |
| 代理商： | LTC1290CISW |
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24
LTC 1290
U
S
A
O
PPLICATI
W
U
I FOR ATIO
U
larger current limiting resistors. Use 1N4148 diode clamps
from the MUX inputs to V
CC
and V
–
if the value of the series
resistor will not allow the maximum clock speeds to be
used or if an unknown source is used to drive the LTC1290
MUX inputs.
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 V
CC
and REF
+
are
not tied together, then V
CC
should be turned on first, then
REF
+
. If this sequence cannot be met, connecting a diode
from REF
+
to V
CC
is recommended (see Figure 21).
For dual supplies (bipolar mode) placing two Schottky
diodes from V
CC
and V
–
to ground (Figure 23) will prevent
power supply reversal from occuring 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 V
CC
will pull a diode drop
below ground which could cause the device not to power
up properly. Likewise, if the input is pulled above V
CC
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 V
CC
.
Because a unique input protection structure is used on the
digital input pins, the signal levels on these pins can
exceed the device V
CC
without damaging the device.
5V
22
μ
F
1290 F21
REF
+
V
CC
LTC1290
1N4148
V
REF
14
20
5V
22
μ
F
1290 F22
DGND
V
–
AGND
V
CC
LTC1290
–5V
0.1
μ
F
1N5817
1N5817
Figure 21
Figure 22. Power Supply Reversal
U
S
A
O
PPLICATI
TYPICAL
A “Quick Look” Circuit for the LTC1290
Users can get a quick look at the function and timing of the
LTC1290 by using the following simple circuit. REF
+
and
D
IN
are tied to V
CC
selecting a 5V input span, CH7 as a
single-ended input, unipolar mode, MSB-first format and
16-bit word length. ACLK and SCLK are tied together and
driven by an external clock. CS is driven at 1/128 the clock
rate by the CD4520 and D
OUT
outputs the data. All other
pins are tied to a ground plane. The output data from the
D
OUT
pin can be viewed on an oscilloscope which is set up
to trigger on the falling edge of CS.
A “Quick Look” Circuit for the LTC1290
1290 TA02
LTC1290
0.1
μ
F
22
μ
F
f
CHO
CH1
CH2
CH3
CH4
CH5
CH6
CH7
COM
DGND
V
IN
{
TO
OSCILLOSCOPE
CD4520
CLK
EN
Q1
Q2
Q3
Q4
RESET
V
SS
V
DD
RESET
Q4
Q3
Q2
Q1
EN
CLK
CLOCK IN
2MHz MAX
5V
V
CC
ACLK
SCLK
D
IN
D
OUT
CS
REF
+
REF
–
V
–
AGND
f/128
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC1290CM | Single Chip 12-Bit Data Acquisition System |
| LTC1290CMJ | Single Chip 12-Bit Data Acquisition System |
| LTC1290DC | Single Chip 12-Bit Data Acquisition System |
| LTC1290DCN | Single Chip 12-Bit Data Acquisition System |
| LTC1290DCSW | Single Chip 12-Bit Data Acquisition System |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC1290CISW#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:Data Converter Basics 標(biāo)準(zhǔn)包裝:1 系列:- 類型:電機(jī)控制 分辨率（位）:12 b 采樣率（每秒）:1M 數(shù)據(jù)接口:串行，并聯(lián) 電壓電源:單電源 電源電壓:2.7 V ~ 3.6 V，4.5 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:100-TQFP 供應(yīng)商設(shè)備封裝:100-TQFP（14x14） 包裝:剪切帶 (CT) 其它名稱:296-18373-1 |
| LTC1290CISW#PBF | 制造商:Linear Technology 功能描述:ADC, 8CH, 12BIT, 50KSPS, SOIC-20 |
| LTC1290CISW#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(biāo)準(zhǔn)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 |
| LTC1290CISW#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(biāo)準(zhǔn)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 |
| LTC1290CMJ | 制造商:Linear Technology 功能描述:ADC Single SAR 50ksps 12-bit Serial 20-Pin CDIP |
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