- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄377745 > LTC1403 (Linear Technology Corporation) Serial 12-Bit/14-Bit, 2.8Msps Sampling ADCs with Shutdown PDF資料下載
參數(shù)資料
| 型號： | LTC1403 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Serial 12-Bit/14-Bit, 2.8Msps Sampling ADCs with Shutdown |
| 中文描述： | 串行12-Bit/14-Bit，2.8Msps采樣ADC，帶有關(guān)斷 |
| 文件頁數(shù)： | 10/20頁 |
| 文件大小： | 323K |
| 代理商： | LTC1403 |
10
LTC1403/LTC1403A
1403af
INPUT FILTERING AND SOURCE IMPEDANCE
The noise and the distortion of the input amplifier and
other circuitry must be considered since they will add to
the LTC1403/LTC1403A noise and distortion. The small-
signal bandwidth of the sample-and-hold circuit is 50MHz.
Any noise or distortion products that are present at the
analog inputs will be summed over this entire bandwidth.
Noisy input circuitry should be filtered prior to the analog
inputs to minimize noise. A simple 1-pole RC filter is
sufficient for many applications. For example, Figure 1
shows a 47pF capacitor from A
IN+
to ground and a 51
source resistor to limit the input bandwidth to 47MHz. The
47pF capacitor also acts as a charge reservoir for the input
sample-and-hold and isolates the ADC input from sam-
pling-glitch sensitive circuitry. High quality capacitors and
resistors should be used since these components can add
distortion. NPO and silvermica type dielectric capacitors
have excellent linearity. Carbon surface mount resistors
can generate distortion from self heating and from dam-
age that may occur during soldering. Metal film surface
mount resistors are much less susceptible to both prob-
lems. When high amplitude unwanted signals are close in
frequency to the desired signal frequency, a multiple pole
filter is required. High external source resistance, com-
bined with the 13pF of input capacitance, will reduce the
rated 50MHz bandwidth and increase acquisition time
beyond 39ns.
Figure 1. RC Input Filter
Figure 2
INPUT RANGE
The analog inputs of the LTC1403/LTC1403A may be
driven fully differentially with a single supply. Each input
may swing up to 3V
P-P
individually. In the conversion
range, the noninverting input of each channel is always up
to 2.5V more positive than the inverting input of each
channel. The 0V to 2.5V range is also ideally suited for
single-ended input use with single supply applications.
The common mode range of the inputs extend from
ground to the supply voltage V
DD
. If the difference be-
tween the A
IN+
and A
IN–
inputs exceeds 2.5V, the output
code will stay fixed at all ones and if this difference goes
below 0V, the ouput code will stay fixed at all zeros.
INTERNAL REFERENCE
The LTC1403/LTC1403A has an on-chip, temperature com-
pensated, bandgap reference that is factory trimmed near
2.5V to obtain 2.5V input span. The reference amplifier
output V
REF
, (Pin 3) must be bypassed with a capacitor to
ground. The reference amplifier is stable with capacitors
of 1
μ
F or greater. For the best noise performance, a 10
μ
F
ceramic or a 10
μ
F tantalum in parallel with a 0.1
μ
F ceramic
is recommended. The V
REF
pin can be overdriven with an
external reference as shown in Figure 2. The voltage of the
external reference must be higher than the 2.5V of the
class A pull-up output of the internal reference. The
recommended range for an external reference is 2.55V to
V
DD
. An external reference at 2.55V will see a DC quiescent
load of 0.75mA and as much as 3mA during conversion.
APPLICATIU
W
U
U
GND
LTC1403/
LTC1403A
V
REF
10
μ
F
11
3
3V
REF
1403A F02
10
μ
F
11
3
A
IN–
LTC1403/
LTC1403A
V
REF
A
IN+
47pF
2
1
51
GND
1403A F01
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC1403A | Serial 12-Bit/14-Bit, 2.8Msps Sampling ADCs with Shutdown |
| LTC1403AIMSE | Serial 12-Bit/14-Bit, 2.8Msps Sampling ADCs with Shutdown |
| LTC1404IS8 | Complete SO-8, 12-Bit, 600ksps ADC with Shutdown |
| LTC1404C | Complete SO-8, 12-Bit, 600ksps ADC with Shutdown |
| LTC1404CS8 | Complete SO-8, 12-Bit, 600ksps ADC with Shutdown |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC1403ACMSE | 功能描述:IC ADC 14BIT 2.8MSPS DIFF 10MSOP 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 個單端，單極 |
| LTC1403ACMSE#PBF | 功能描述:IC ADC 14BIT 2.8MSPS 10-MSOP 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 個單端，單極 產(chǎn)品目錄頁面:892 (CN2011-ZH PDF) 其它名稱:296-25851-6 |
| LTC1403ACMSE#PBF | 制造商:Linear Technology 功能描述:ADC, 14BIT, 2.8MSPS, MSOP-10 |
| LTC1403ACMSE#TR | 功能描述:IC ADC 14BIT 2.8MSPS DIFF 10MSOP 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 個單端，單極 |
| LTC1403ACMSE#TRPBF | 功能描述:IC ADC 14BIT 2.8MSPS DIFF 10MSOP 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:1,000 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 個單端，單極 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。