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参数资料
| 型号： | DC1383A-A |
| 厂商： | Linear Technology |
| 文件页数： | 5/20页 |
| 文件大小： | 0K |
| 描述： | BOARD DELTA SIGMA ADC LTC2451 |
| 软件下载： | QuikEval System |
| 设计资源： | DC1383A Design File DC1383A Schematic |
| 标准包装： | 1 |
| 系列： | QuikEval™ |
| ADC 的数量： | 1 |
| 位数： | 16 |
| 采样率（每秒）： | 60 |
| 数据接口： | I²C，串行 |
| 输入范围： | ±VREF |
| 已用 IC / 零件： | LTC2451 |
| 已供物品： | 板 |
| 相关产品： | 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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相关代理商/技术参数 |
参数描述 |
|---|---|
| DC1384A-A | 功能描述:BOARD DELTA SIGMA ADC LTC2452 RoHS:是 类别:编程器，开发系统 >> 评估板 - 模数转换器 (ADC) 系列:QuikEval™ 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:- ADC 的数量:1 位数:12 采样率（每秒）:94.4k 数据接口:USB 输入范围:±VREF/2 在以下条件下的电源（标准）:- 工作温度:-40°C ~ 85°C 已用 IC / 零件:MAX11645 已供物品:板，软件 |
| DC1385A | 功能描述:BOARD EVAL LTM4614 RoHS:否 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:µModule® 标准包装:1 系列:- 主要目的:DC/DC，步降 输出及类型:1，非隔离 功率 - 输出:- 输出电压:3.3V 电流 - 输出:3A 输入电压:4.5 V ~ 28 V 稳压器拓扑结构:降压 频率 - 开关:250kHz 板类型:完全填充 已供物品:板 已用 IC / 零件:L7981 其它名称:497-12113STEVAL-ISA094V1-ND |
| DC1386B | 功能描述:BOARD DEMO LTM8032 RoHS:否 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:µModule® 标准包装:1 系列:- 主要目的:DC/DC，步降 输出及类型:1，非隔离 功率 - 输出:- 输出电压:3.3V 电流 - 输出:3A 输入电压:4.5 V ~ 28 V 稳压器拓扑结构:降压 频率 - 开关:250kHz 板类型:完全填充 已供物品:板 已用 IC / 零件:L7981 其它名称:497-12113STEVAL-ISA094V1-ND |
| DC1386B | 制造商:Linear Technology 功能描述:DEMOBOARD NUMBER FOR LTM8032 |
| DC1390-104K | 制造商:API 制造商全称:API Delevan 功能描述:High Current Power Line Chokes |
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