- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄377770 > LTC2420 (Linear Technology Corporation) Micropower 20-bit ADC(微功耗，20位串行模數(shù)轉(zhuǎn)換器) PDF資料下載
參數(shù)資料
| 型號(hào)： | LTC2420 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Micropower 20-bit ADC(微功耗，20位串行模數(shù)轉(zhuǎn)換器) |
| 中文描述： | 微功耗20位ADC（微功耗，20位串行模數(shù)轉(zhuǎn)換器） |
| 文件頁數(shù)： | 33/36頁 |
| 文件大?。?/td> | 388K |
| 代理商： | LTC2420 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁當(dāng)前第33頁第34頁第35頁第36頁
33
LTC2420
TYPICAL APPLICATIO S
Using a Low Power Precision Reference
The circuit in Figure 38 shows the connections and by-
passing for an LT1461-2.5 as a 2.5V reference. The
LT1461 is a bandgap reference capable of 3ppm/
°
C tem-
perature stability yet consumes only 45
μ
A of current. The
1k resistor between the reference and the ADC reduces the
transient load changes associated with sampling and
produces optimal results. This reference will not impact
the noise level of the LTC2420 if signals are less than 60%
full scale, and only marginally increases noise approach-
ing full scale. Even lower power references can be used if
only the lower end of the LTC2420 input range is required.
A Differential to Single-Ended Analog Front End
Figure 39 shows the LT1167 as a means of sensing
differential signals. The noise performance of the LT1167
is such that for gains less than 200, the noise floor of the
LTC2420 remains the dominant noise source. At the point
where the noise of the amplifier begins to dominate, the
input referred noise is essentially that of the instrumenta-
tion amplifier. The linearity of the instrumentation ampli-
fier does, however, degrade at higher gains. As a result, if
the full linearity of the LTC2420 is desired, gain in the
instrumentation amplifier should be limited to less than
100, possibly requiring averaging multiple samples to
extend the resolution below the noise floor. The noise level
of the LT1167 at gains greater than 100 is on the order of
50nV
RMS
, although, 1/f noise and temperature effects may
degrade this below 0.1Hz. The introduction of a filter
between the amplifier and the LTC2420 may improve
noise levels under some circumstances by reducing noise
bandwidth. Note that temperature offset drift effects enve-
lope detection in the input of the LT1167 if exposed to RFI,
thermocouple voltages in connectors, resistors and sol-
dered junctions can all compromise results, appearing as
drift or noise. Turbulent airflow over this circuitry should
be avoided.
+
LT1461-2.5
GND
IN
2420 F38
10
μ
F
16V
TANT
TO
LTC2420
REF
OUT
5V
1k
0.1
μ
F
CER
+
–
+
LT1167
3.5k
×
4
1
2
R
G
5V
8
3
5
1
μ
F
22
5k
1
2
3
10
μ
F
A
V
=
RECOMMENDED R
G
: 500
, 0.1%
5ppm/
°
C
+ 1
49.4k
R
G
4
OPTIONAL
6
2428 F39
–5V
5V
LTC2420
Figure 38. Low Power Reference
Figure 39. A Differential to Single-Ended Analog Front End
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC2435IGN | 20-Bit No Latency ADCs with Differential Input and Differential Reference |
| LTC2435-1IGN | 20-Bit No Latency ADCs with Differential Input and Differential Reference |
| LTC2435 | 20-Bit No Latency ADCs with Differential Input and Differential Reference |
| LTC2435-1 | 20-Bit No Latency ADCs with Differential Input and Differential Reference |
| LTC2435-1CGN | 20-Bit No Latency ADCs with Differential Input and Differential Reference |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC2420CS8 | 功能描述:IC ADC 20BIT MICRPWR W/OSC 8SOIC RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 位數(shù):16 采樣率（每秒）:45k 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:2 功率耗散（最大）:315mW 電壓電源:模擬和數(shù)字 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數(shù)目和類型:2 個(gè)單端，單極 |
| LTC2420CS8#PBF | 功能描述:IC ADC 20BIT MICRPWR W/OSC 8SOIC RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:1 系列:microPOWER™ 位數(shù):8 采樣率（每秒）:1M 數(shù)據(jù)接口:串行，SPI? 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:- 電壓電源:模擬和數(shù)字 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:24-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:24-VQFN 裸露焊盤（4x4） 包裝:Digi-Reel® 輸入數(shù)目和類型:8 個(gè)單端，單極 產(chǎn)品目錄頁面:892 (CN2011-ZH PDF) 其它名稱:296-25851-6 |
| LTC2420CS8#PBF | 制造商:Linear Technology 功能描述:A/D Converter (A-D) IC |
| LTC2420CS8#TR | 功能描述:IC A/D CONV 20BIT MICRPWR 8-SOIC RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 位數(shù):16 采樣率（每秒）:45k 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:2 功率耗散（最大）:315mW 電壓電源:模擬和數(shù)字 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數(shù)目和類型:2 個(gè)單端，單極 |
| LTC2420CS8#TRPBF | 功能描述:IC ADC 20BIT MICRPWR W/OSC 8SOIC RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 位數(shù):16 采樣率（每秒）:45k 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:2 功率耗散（最大）:315mW 電壓電源:模擬和數(shù)字 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數(shù)目和類型:2 個(gè)單端，單極 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。