- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄378284 > ADC12L038 (National Semiconductor Corporation) 3.3V Self-Calibrating 12-Bit Plus Sign Serial I/O A/D Converters with MUX and Sample/Hold(可自行校對3.3V12位串行輸入/輸出帶MUX，采樣/保持功能A/D轉(zhuǎn)換器) PDF資料下載
參數(shù)資料
| 型號： | ADC12L038 |
| 廠商： | National Semiconductor Corporation |
| 元件分類： | 串行ADC |
| 英文描述： | 3.3V Self-Calibrating 12-Bit Plus Sign Serial I/O A/D Converters with MUX and Sample/Hold(可自行校對3.3V12位串行輸入/輸出帶MUX，采樣/保持功能A/D轉(zhuǎn)換器) |
| 中文描述： | 3.3自校準(zhǔn)12位帶符號串行I /辦公自動(dòng)化/ D轉(zhuǎn)換器MUX和采樣/保持（可自行校對3.3V12位串行輸入/輸出帶復(fù)用，采樣/保持功能的A / D轉(zhuǎn)換器） |
| 文件頁數(shù)： | 27/36頁 |
| 文件大小： | 819K |
| 代理商： | ADC12L038 |
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頁當(dāng)前第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁
Application Hints
(Continued)
2.1 Biasing for Various Multiplexer Configurations
Figure 11 is an example of biasing the device for
single-ended operation. The sign bit is always low. The
digital output range is 0 0000 0000 0000 to 0 1111 1111 1111.
One LSB is equal to 610 μV (2.5V/4096 LSBs).
For pseudo-differential signed operation the biasing circuit
shown in Figure 12 shows a signal AC coupled to the ADC.
This gives a digital output range of 4096 to +4095. With a
1.25V reference, as shown, 1 LSB is equal to 305 μV. Al-
though the ADC is not production tested with a 1.25V refer-
ence linearity error typically will not change more than 0.3
LSB. With the ADC set to an acquisition time of 10 clock
periods the input biasing resistor needs to be 600
or less.
Notice though that the input coupling capacitor needs to be
made fairly large to bring down the high pass corner. In-
creasing the acquisition time to 34 clock periods (with a
5 MHz CCLK frequency) would allow the 600
to increase to
6k, which with a 1 μF coupling capacitor would set the high
pass corner at 26 Hz. The value of R1 will depend on the
value of R2.
An alternative method for biasing pseudo-differential opera-
tion is to use the +1.25V from the LM4040 to bias any
amplifier circuits driving the ADC as shown in Figure 13 The
value of the resistor pull-up biasing the LM4040-2.5 will
depend upon the current required by the op amp biasing
circuitry.
Fully differential operation is shown in Figure 14 One LSB
for this case is equal to (2.5V/4096) = 610 mV.
Differential
Configuration
DS011830-40
A/DIN1 and A/DIN2 can be assigned as the + or input
Single-Ended
Configuration
DS011830-41
A/DIN1 is + input
A/DIN2 is input
FIGURE 10.
DS011830-46
FIGURE 11. Single-Ended Biasing
A
www.national.com
27
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ADC12L032 | 3.3V Self-Calibrating 12-Bit Plus Sign Serial I/O A/D Converters with MUX and Sample/Hold(可自行校對3.3V12位串行輸入/輸出帶MUX，采樣/保持功能A/D轉(zhuǎn)換器) |
| ADC12L032CIWM | 3.3V Self-Calibrating 12-Bit Plus Sign Serial I/O A/D Converters with MUX and Sample/Hold |
| ADC12L034CIWM | 3.3V Self-Calibrating 12-Bit Plus Sign Serial I/O A/D Converters with MUX and Sample/Hold |
| ADC12L038CIWM | 3.3V Self-Calibrating 12-Bit Plus Sign Serial I/O A/D Converters with MUX and Sample/Hold |
| ADC14061CCVT | Self-Calibrating 14-Bit, 2.5 MSPS, 390 mW A/D Converter |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADC12L038CIN | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Single-Ended Data Acquisition System |
| ADC12L038CIWM | 制造商:Rochester Electronics LLC 功能描述:12BIT +SIGN 3.3V SERIAL A/D - Bulk 制造商:Texas Instruments 功能描述: |
| ADC12L038CIWM/NOPB | 功能描述:IC ADC 12BIT W/S&H +SIGN 28SOIC RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 位數(shù):12 采樣率（每秒）:3M 數(shù)據(jù)接口:- 轉(zhuǎn)換器數(shù)目:- 功率耗散（最大）:- 電壓電源:- 工作溫度:- 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應(yīng)商設(shè)備封裝:SOT-23-6 包裝:帶卷 (TR) 輸入數(shù)目和類型:- |
| ADC12L038CIWMX | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Single-Ended Data Acquisition System |
| ADC12L063 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:12-Bit, 62 MSPS, 354 mW A/D Converter with Internal Sample-and-Hold |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。