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參數(shù)資料
| 型號： | DC1383A-A |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 5/20頁 |
| 文件大?。?/td> | 0K |
| 描述： | BOARD DELTA SIGMA ADC LTC2451 |
| 軟件下載： | QuikEval System |
| 設(shè)計資源： | DC1383A Design File DC1383A Schematic |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | QuikEval™ |
| ADC 的數(shù)量： | 1 |
| 位數(shù)： | 16 |
| 采樣率（每秒）： | 60 |
| 數(shù)據(jù)接口： | I²C，串行 |
| 輸入范圍： | ±VREF |
| 已用 IC / 零件： | LTC2451 |
| 已供物品： | 板 |
| 相關(guān)產(chǎn)品： | LTC2451ITS8#TRPBF-ND - IC ADC 16BIT DELTA SIG TSOT23-8 LTC2451ITS8#TRMPBFTR-ND - IC ADC 16BIT DELTA SIG TSOT23-8 LTC2451CTS8#TRPBF-ND - IC ADC 16BIT DELTA SIG TSOT23-8 LTC2451CTS8#TRMPBFTR-ND - IC ADC 16BIT DELTA SIG TSOT23-8 LTC2451IDDB#TRPBF-ND - IC ADC 16BIT DELTA SIGMA 8DFN LTC2451IDDB#TRMPBFTR-ND - IC ADC 16BIT DELTA SIGMA 8DFN LTC2451CDDB#TRPBF-ND - IC ADC 16BIT DELTA SIGMA 8DFN LTC2451CDDB#TRMPBFTR-ND - IC ADC 16BIT DELTA SIGMA 8DFN |
LTC2451
13
2451fg
It is also desirable to avoid any via in the circuit path,
starting from the converter VCCpin,passingthroughthese
two decoupling capacitors, and returning to the converter
GND pin. The area encompassed by this circuit path, as
well as the path length, should be minimized.
Very low impedance ground and power planes, and star
connections at both VCC and GND pins, are preferable. The
VCC pin should have three distinct connections: the first to
the decoupling capacitors described above, the second to
the ground return for the input signal source, and the third
to the ground return for the power supply voltage source.
Driving REF+ and REF–
A simplified equivalent circuit for REF+ and REF– is shown
in Figure 10. Like all other A/D converters, the LTC2451
is only as accurate as the reference it is using. Therefore,
it is important to keep the reference line quiet by careful
low and high frequency power supply decoupling.
The LT6660 reference is an ideal match for driving the
LTC2451’s REF+ pin. The LTC6660 is available in a 2mm
× 2mm DFN package with 2.5V, 3V, 3.3V and 5V options.
Figure 10. LTC2451 Analog Input and
Reference Pins Equivalent Circuit
A 0.1F, high quality, ceramic capacitor in parallel with
a 10F ceramic capacitor should be connected between
the REF+/REF– and GND pins, as close as possible to the
package. The 0.1F capacitor should be placed closest
to the ADC.
Driving IN
The input drive requirements can best be analyzed using
the equivalent circuit of Figure 11. The input signal, VSIG,is
connected to the ADC input pin (IN) through an equivalent
sourceresistanceRS.Thisresistorincludesboththeactual
generator source resistance and any additional optional
resistors connected to the input pin. An optional input
capacitor, CIN, is also connected between the ADC input
pin and GND. This capacitor is placed in parallel with the
ADC input parasitic capacitance, CPAR. Depending on the
PCB layout, CPARhastypicalvaluesbetween2pFand15pF.
In addition, the equivalent circuit of Figure 11 includes the
converter equivalent internal resistor, RSW, and sampling
capacitor, CEQ.
APPLICATIONS INFORMATION
VCC
CEQ
0.35pF
(TYP)
REF+
IN
REF–
2451 F10
RSW
15k
(TYP)
ILEAK
RSW
15k
(TYP)
ILEAK
RSW
15k
(TYP)
ILEAK
Figure 11. LTC2451 Input Drive Equivalent Circuit
VSIG
2451 F11
ILEAK
RSW
15k
(TYP)
ICONV
CIN
IN
VCC
RS
CEQ
0.35pF
(TYP)
CPAR
+–
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DC1384A-A | 功能描述:BOARD DELTA SIGMA ADC LTC2452 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - 模數(shù)轉(zhuǎn)換器 (ADC) 系列:QuikEval™ 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- ADC 的數(shù)量:1 位數(shù):12 采樣率（每秒）:94.4k 數(shù)據(jù)接口:USB 輸入范圍:±VREF/2 在以下條件下的電源（標(biāo)準(zhǔn)）:- 工作溫度:-40°C ~ 85°C 已用 IC / 零件:MAX11645 已供物品:板，軟件 |
| DC1385A | 功能描述:BOARD EVAL LTM4614 RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - DC/DC 與 AC/DC（離線）SMPS 系列:µModule® 標(biāo)準(zhǔn)包裝:1 系列:- 主要目的:DC/DC，步降 輸出及類型:1，非隔離 功率 - 輸出:- 輸出電壓:3.3V 電流 - 輸出:3A 輸入電壓:4.5 V ~ 28 V 穩(wěn)壓器拓撲結(jié)構(gòu):降壓 頻率 - 開關(guān):250kHz 板類型:完全填充 已供物品:板 已用 IC / 零件:L7981 其它名稱:497-12113STEVAL-ISA094V1-ND |
| DC1386B | 功能描述:BOARD DEMO LTM8032 RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - DC/DC 與 AC/DC（離線）SMPS 系列:µModule® 標(biāo)準(zhǔn)包裝:1 系列:- 主要目的:DC/DC，步降 輸出及類型:1，非隔離 功率 - 輸出:- 輸出電壓:3.3V 電流 - 輸出:3A 輸入電壓:4.5 V ~ 28 V 穩(wěn)壓器拓撲結(jié)構(gòu):降壓 頻率 - 開關(guān):250kHz 板類型:完全填充 已供物品:板 已用 IC / 零件:L7981 其它名稱:497-12113STEVAL-ISA094V1-ND |
| DC1386B | 制造商:Linear Technology 功能描述:DEMOBOARD NUMBER FOR LTM8032 |
| DC1390-104K | 制造商:API 制造商全稱:API Delevan 功能描述:High Current Power Line Chokes |
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