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參數(shù)資料
| 型號： | LTC2391ILX-16#TRPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | ADC |
| 英文描述： | SUCCESSIVE APPROXIMATION ADC, PQFP48 |
| 封裝： | 7 X 7 MM, LEAD FREE, PLASTIC, MS-026, LQFP-48 |
| 文件頁數(shù)： | 7/24頁 |
| 文件大?。?/td> | 286K |
| 代理商： | LTC2391ILX-16#TRPBF |
LTC2391-16
239116f
APPLICATIONs INFOrmATION
from that conversion can be read after PD = low is ap-
plied. In this mode, power consumption drops to a typical
value of 175W from 95mW. This mode can be used if the
LTC2391-16 is inactive for a long period of time and the
user wants to minimize the power dissipation.
Recovery from Power Shutdown Mode
Once the PD pin is returned to a low level, ending the
power shutdown request, the internal circuitry will begin
to power up. If the internal reference is used, the 2.6kΩ
output impedance with the 1F bypass capacitor on the
REFIN/REFOUT pins will be the main time constant for
the power-on recovery time. If an external reference is
used, typically allow 5ms for recovery before initiating a
new conversion.
Power Dissipation vs Sampling Frequency
The power dissipation of the LTC2391-16 will decrease
as the sampling frequency is reduced when nap mode
is activated. See Figure 7. In nap mode, a portion of the
circuitryontheLTC2391-16isturnedoffafteraconversion
has been completed. Increasing the time allowed between
conversions lowers the average power.
TIMING AND CONTROL
The LTC2391-16 conversion is controlled by CNVST. A
falling edge on CNVST will start a conversion. CS and RD
control the digital interface on the LTC2391-16. When
either CS or RD is high, the digital outputs are high
impedance.
CNVST Timing
The LTC2391-16 conversion is controlled by CNVST. A
falling edge on CNVST will start a conversion. Once a
conversion has been initiated, it cannot be restarted until
the conversion is complete. For optimum performance
CNVST should be a clean low jitter signal. Converter status
is indicated by the BUSY output which remains high while
the conversion is in progress. To ensure no errors occur
in the digitized results return the rising edge either within
40ns from the start of the conversion or wait until after
the conversion has been completed. The CNVST timing
needed to take advantage of the reduced power mode of
operation is described in the Nap Mode section.
Internal Conversion Clock
The LTC2391-16 has an internal clock that is trimmed
to achieve a maximum conversion time of 2500ns. No
external adjustments are required and with a maximum
acquisition time of 1485ns, a throughput performance of
250ksps is guaranteed.
DIGITAL INTERFACE
The LTC2391-16 allows both parallel and serial digital
interfaces. The flexible OVP supply allows the LTC2391-16
to communicate with any digital logic operating between
1.8V and 5V, including 2.5V and 3.3V systems.
Figure 7. Power Dissipation of the LTC2391-16
Decreases with Decreasing Sampling Frequency
SAMPLING FREQUENCY (kHz)
10
POWER
SUPPL
YCURRENT
(mA)
20
30
5
15
25
0.1
10
100
1000
239116 G15
0
1
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| LTC2391IUK-16#PBF | 功能描述:IC ADC 16B SER/PAR 250KSPS 48QFN RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標準包裝:1,000 系列:- 位數(shù):12 采樣率（每秒）:300k 數(shù)據(jù)接口:并聯(lián) 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:75mW 電壓電源:單電源 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:24-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:24-SOIC 包裝:帶卷 (TR) 輸入數(shù)目和類型:1 個單端，單極；1 個單端，雙極 |
| LTC2391IUK-16#TRPBF | 功能描述:IC ADC 16B SER/PAR 250KSPS 48QFN RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標準包裝:1,000 系列:- 位數(shù):12 采樣率（每秒）:300k 數(shù)據(jù)接口:并聯(lián) 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:75mW 電壓電源:單電源 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:24-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:24-SOIC 包裝:帶卷 (TR) 輸入數(shù)目和類型:1 個單端，單極；1 個單端，雙極 |
| LTC2392CLX-16#PBF | 功能描述:IC ADC 16BIT SER/PAR 500K 48LQFP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標準包裝:1,000 系列:- 位數(shù):12 采樣率（每秒）:300k 數(shù)據(jù)接口:并聯(lián) 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:75mW 電壓電源:單電源 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:24-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:24-SOIC 包裝:帶卷 (TR) 輸入數(shù)目和類型:1 個單端，單極；1 個單端，雙極 |
| LTC2392CLX-16#PBF | 制造商:Linear Technology 功能描述:ANALOG TO DIGITAL (A/D) CONVERTER IC |
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