- 您現(xiàn)在的位置：買(mǎi)賣(mài)IC網(wǎng) > PDF目錄385503 > LTC1406 (Linear Technology Corporation) Low Power, 8-Bit, 20Msps, Sampling A/D Converter(低功耗,12位, 20Msps,采樣模數(shù)轉(zhuǎn)換器) PDF資料下載
參數(shù)資料
| 型號(hào)： | LTC1406 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Low Power, 8-Bit, 20Msps, Sampling A/D Converter(低功耗,12位, 20Msps,采樣模數(shù)轉(zhuǎn)換器) |
| 中文描述： | 低功耗，8位，20Msps，采樣A / D轉(zhuǎn)換器（低功耗，12位，20Msps，采樣模數(shù)轉(zhuǎn)換器） |
| 文件頁(yè)數(shù)： | 10/16頁(yè) |
| 文件大?。?/td> | 367K |
| 代理商： | LTC1406 |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)當(dāng)前第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)
10
LTC1406
APPLICATIO
S I
N
FOR
ATIO
U
70
W
U
single input providing a
±
1V bipolar input range centered
around A
IN–
. Likewise, A
IN+
can be tied to a fixed voltage
and A
IN–
used as the single input. In any configuration the
maximum output code (1111 1111) occurs when [(A
IN+
)
– (A
IN–
)] = 1V and the minimum output code (0000 0000)
occurs when [(A
IN+
) – (A
IN–
)] = –1V.
Each analog input can swing from ground to V
DD
but not
beyond. Therefore, the input common mode voltage can
range from 0.5V to 4.5V in differential mode and from 1V
to 4V in single-ended mode.
As an example, with A
IN–
connected to the V
REF
pin (2.5V)
the input range will be 1.5V to 3.5V (see Figure 8a). To
achieve other ranges the input may be capacitively coupled
to achieve a 2V span with virtually any common mode
voltage (see Figure 8b).
The 2V input span requires a 2.5V external reference be
connected to the V
REF
pin. The LT1460-2.5 micropower
precision series reference is recommended. To achieve
other input spans, the reference voltage (V
REF
) can vary
between 2V to 3V. The V
REF
pin can also be driven with a
DAC or other means. This is useful in applications where
the peak input signal amplitude may vary. The input span
of the ADC can then be adjusted to match the peak input
signal, maximizing the signal-to-noise ratio.
The analog inputs of the LTC1406 are easy to drive. The
inputs draw only one small current spike while charging
the sample-and-hold capacitors following a rising CLK edge.
INPUT FREQUENCY (Hz)
100k
C
60
50
40
30
20
10
0
1M
10M
100M
1406 G08
Figure 7. Common Mode Rejection
vs Input Frequency
Figure 8b. AC Coupled
Figure 8a. DC Coupled
A
IN+
ANALOG INPUT
1.5V TO 3.5V
2.5V
1406 F08a
A
IN–
LTC1406
V
REF
A
IN+
ANALOG INPUT
2V SPAN
2.5V
1406 F08b
A
IN–
LTC1406
V
REF
While CLK is low the analog inputs draw only a small leak-
age current. If the source impedance of the driving circuit
is low, then the LTC1406 inputs can be driven directly. As
source impedance increases, so will acquisition time. For
minimum acquisition time with high source impedance, a
buffer amplifier should be used. The only requirement is
that the amplifier driving the analog input(s) must settle
after the small current spike before the next conversion
starts (settling time must be 25ns for full throughput rate).
Choosing an Input Amplifier
Choosing an input amplifier is easy if a few requirements
are taken into consideration. First, to limit the magnitude
of the voltage spike seen by the amplifier from charging
the sampling capacitor, choose an amplifier that has a low
output impedance (<50
) at the closed-loop bandwidth
frequency. For example, if an amplifier is used in a gain of
1 and has a unity-gain bandwidth of 50MHz, then the out-
put impedance at 50MHz must be less than 50
. The
second requirement is that the closed-loop bandwidth must
be greater than 70MHz to ensure adequate small-signal
settling for full throughput rate.
The following list is a summary of the op amps that are
suitable for driving the LTC1406. More detailed informa-
tion is available in the Linear Technology Databooks and
on the LinearView
TM
CD-ROM.
LT
1223:
100MHz Video Current Feedback Amplifier. 6mA
supply current.
±
5V to
±
15V supplies. Low noise.
LT1227:
140MHz Video Current Feedback Amplifier. 10mA
supply current.
±
5V to
±
15V supplies. Low distortion.
Low noise.
LinearView is a trademark of Linear Technology Corporation.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC1409 | 12-Bit, 800ksps Sampling A/D Converter with Shutdown(12位, 800ksps,采樣模數(shù)轉(zhuǎn)換器(帶關(guān)斷)) |
| LTC1412 | 12-Bit, 3Msps, Sampling A/D Converter |
| LTC1412C | 12-Bit, 3Msps, Sampling A/D Converter |
| LTC1412CG | 12-Bit, 3Msps, Sampling A/D Converter |
| LTC1412I | 12-Bit, 3Msps, Sampling A/D Converter |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC1406CGN | 功能描述:IC A/D CONV 8BIT SAMPLING 24SSOP 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:2,500 系列:- 位數(shù):16 采樣率（每秒）:15 數(shù)據(jù)接口:MICROWIRE?，串行，SPI? 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:480µW 電壓電源:單電源 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:38-WFQFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:38-QFN（5x7） 包裝:帶卷 (TR) 輸入數(shù)目和類型:16 個(gè)單端，雙極；8 個(gè)差分，雙極 配用:DC1011A-C-ND - BOARD DELTA SIGMA ADC LTC2494 |
| LTC1406CGN#PBF | 功能描述:IC A/D CONV 8BIT SAMPLING 24SSOP 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:2,500 系列:- 位數(shù):16 采樣率（每秒）:15 數(shù)據(jù)接口:MICROWIRE?，串行，SPI? 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:480µW 電壓電源:單電源 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:38-WFQFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:38-QFN（5x7） 包裝:帶卷 (TR) 輸入數(shù)目和類型:16 個(gè)單端，雙極；8 個(gè)差分，雙極 配用:DC1011A-C-ND - BOARD DELTA SIGMA ADC LTC2494 |
| LTC1406CGN#TR | 功能描述:IC ADC 8BIT 20MSPS SAMPLE 24SSOP 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:2,500 系列:- 位數(shù):16 采樣率（每秒）:15 數(shù)據(jù)接口:MICROWIRE?，串行，SPI? 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:480µW 電壓電源:單電源 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:38-WFQFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:38-QFN（5x7） 包裝:帶卷 (TR) 輸入數(shù)目和類型:16 個(gè)單端，雙極；8 個(gè)差分，雙極 配用:DC1011A-C-ND - BOARD DELTA SIGMA ADC LTC2494 |
| LTC1406CGN#TRPBF | 功能描述:IC A/D CONV 8BIT SAMPLING 24SSOP 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:2,500 系列:- 位數(shù):16 采樣率（每秒）:15 數(shù)據(jù)接口:MICROWIRE?，串行，SPI? 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:480µW 電壓電源:單電源 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:38-WFQFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:38-QFN（5x7） 包裝:帶卷 (TR) 輸入數(shù)目和類型:16 個(gè)單端，雙極；8 個(gè)差分，雙極 配用:DC1011A-C-ND - BOARD DELTA SIGMA ADC LTC2494 |
| LTC1406IGN | 功能描述:IC A/D CONV 8BIT SAMPLING 24SSOP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 其它有關(guān)文件:TSA1204 View All Specifications 標(biāo)準(zhǔn)包裝:1 系列:- 位數(shù):12 采樣率（每秒）:20M 數(shù)據(jù)接口:并聯(lián) 轉(zhuǎn)換器數(shù)目:2 功率耗散（最大）:155mW 電壓電源:模擬和數(shù)字 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-TQFP 供應(yīng)商設(shè)備封裝:48-TQFP（7x7） 包裝:Digi-Reel® 輸入數(shù)目和類型:4 個(gè)單端，單極；2 個(gè)差分，單極 產(chǎn)品目錄頁(yè)面:1156 (CN2011-ZH PDF) 其它名稱:497-5435-6 |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。