- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄377721 > LTC2227 (Linear Technology Corporation) Hex Schmitt-Trigger Inverter 14-SO -40 to 85 PDF資料下載
參數(shù)資料
| 型號(hào)： | LTC2227 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Hex Schmitt-Trigger Inverter 14-SO -40 to 85 |
| 中文描述： | 14位，125/105Msps低功耗3V的模數(shù)轉(zhuǎn)換器 |
| 文件頁(yè)數(shù)： | 15/24頁(yè) |
| 文件大?。?/td> | 608K |
| 代理商： | LTC2227 |
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)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)當(dāng)前第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)第19頁(yè)第20頁(yè)第21頁(yè)第22頁(yè)第23頁(yè)第24頁(yè)
LTC2255/LTC2254
15
22554f
For input frequencies above 70MHz, the input circuits of
Figure 6, 7 and 8 are recommended. The balun trans-
former gives better high frequency response than a flux
coupled center tapped transformer. The coupling capaci-
tors allow the analog inputs to be DC biased at 1.5V. In
Figure 8, the series inductors are impedance matching
elements that maximize the ADC bandwidth.
APPLICATIOU
W
U
U
Figure 6. Recommended Front End Circuit for
Input Frequencies Between 70MHz and 170MHz
Figure 8. Recommended Front End Circuit for
Input Frequencies Above 300MHz
Figure 7. Recommended Front End Circuit for
Input Frequencies Between 170MHz and 300MHz
Figure 9. Equivalent Reference Circuit
Reference Operation
Figure 9 shows the LTC2255/LTC2254 reference circuitry
consisting of a 1.5V bandgap reference, a difference
amplifier and switching and control circuit. The internal
voltage reference can be configured for two pin selectable
input ranges of 2V (
±
1V differential) or 1V (
±
0.5V differ-
ential). Tying the SENSE pin to V
DD
selects the 2V range;
tying the SENSE pin to V
CM
selects the 1V range.
The 1.5V bandgap reference serves two functions: its
output provides a DC bias point for setting the common
mode voltage of any external input circuitry; additionally,
the reference is used with a difference amplifier to gener-
ate the differential reference levels needed by the internal
ADC circuitry. An external bypass capacitor is required for
the 1.5V reference output, V
CM
. This provides a high
frequency low impedance path to ground for internal and
external circuitry.
The difference amplifier generates the high and low refer-
ence for the ADC. High speed switching circuits are
connected to these outputs and they must be externally
bypassed. Each output has two pins. The multiple output
25
25
12
12
0.1
μ
F
A
IN+
A
IN–
8pF
2.2
μ
F
V
CM
LTC2255/
LTC2254
ANALOG
INPUT
0.1
μ
F
0.1
μ
F
T1
T1 = MA/COM, ETC 1-1-13
RESISTORS, CAPACITORS
ARE 0402 PACKAGE SIZE
22554 F06
25
25
0.1
μ
F
A
IN+
A
IN–
2.2
μ
F
V
CM
LTC2255/
LTC2254
ANALOG
INPUT
0.1
μ
F
0.1
μ
F
T1
T1 = MA/COM, ETC 1-1-13
RESISTORS, CAPACITORS, INDUCTORS
ARE 0402 PACKAGE SIZE
22554 F08
8.2nH
8.2nH
25
25
0.1
μ
F
A
IN+
A
IN–
2.2
μ
F
V
CM
LTC2255/
LTC2254
ANALOG
INPUT
0.1
μ
F
0.1
μ
F
T1
T1 = MA/COM, ETC 1-1-13
RESISTORS, CAPACITORS
ARE 0402 PACKAGE SIZE
22554 F07
V
CM
REFH
SENSE
TIE TO V
DD
FOR 2V RANGE;
TIE TO V
FOR 1V RANGE;
RANGE = 2 V
SENSE
FOR
0.5V < V
SENSE
< 1V
1.5V
REFL
2.2
μ
F
2.2
μ
F
INTERNAL ADC
HIGH REFERENCE
BUFFER
0.1
μ
F
22554 F09
LTC2255/LTC2254
4
DIFF AMP
1
μ
F
1
μ
F
INTERNAL ADC
LOW REFERENCE
1.5V BANDGAP
REFERENCE
1V
0.5V
RANGE
DETECT
AND
CONTROL
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC2228 | Hex Schmitt-Trigger Inverter 14-TSSOP -40 to 85 |
| LTC2229 | 14-Bit, 125/105Msps Low Power 3V ADCs |
| LTC2255IUH | 14-Bit, 125/105Msps Low Power 3V ADCs |
| LT1996AIDD | Precision, 100uA Gain Selectable Amplifier |
| LT1996 | Precision, 100uA Gain Selectable Amplifier |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC2227CUH | 制造商:LINER 制造商全稱:Linear Technology 功能描述:12-Bit, 65/40/25Msps Low Power 3V ADCs |
| LTC2227CUH#PBF | 功能描述:IC ADC 12BIT 40MSPS SAMPL 32-QFN 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(yè)面:892 (CN2011-ZH PDF) 其它名稱:296-25851-6 |
| LTC2227CUH#PBF | 制造商:Linear Technology 功能描述:A/D Converter (A-D) IC 制造商:Linear Technology 功能描述:IC, ADC, 12BIT, 40MSPS, QFN-32 |
| LTC2227CUH#TRPBF | 功能描述:IC ADC 12BIT 40MSPS SAMPL 32-QFN 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):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(gè)單端，單極；1 個(gè)單端，雙極 |
| LTC2227CUH-PBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:12-Bit, 65/40/25Msps Low Power 3V ADCs |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。