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| 型号： | LTC1403ACMSE-1 |
| 厂商： | Linear Technology |
| 文件页数： | 3/22页 |
| 文件大小： | 0K |
| 描述： | IC ADC 14BIT 2.8MSPS DIFF 10MSOP |
| 标准包装： | 50 |
| 位数： | 14 |
| 采样率（每秒）： | 2.8M |
| 数据接口： | 串行，SPI? |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 12mW |
| 电压电源： | 单电源 |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 |
| 供应商设备封装： | 10-MSOP 裸露焊盘 |
| 包装： | 管件 |
| 输入数目和类型： | 2 个单端，单极；1 个差分，单极 |
| 配用： | DC1082A-D-ND - BOARD SAR ADC LTC1403A DC1082A-C-ND - BOARD SAR ADC LTC1403A-1 |
LTC1403-1/LTC1403A-1
11
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APPLICATIONS INFORMATION
DRIVING THE ANALOG INPUT
ThedifferentialanaloginputsoftheLTC1403-1/LTC1403A-1
are easy to drive. The inputs may be driven differentially or
as a single-ended input (i.e., the AIN– input is set to VCM).
Bothdifferentialanaloginputs,AIN+withAIN–,aresampled
at the same instant. Any unwanted signal that is common
to both inputs of each input pair will be reduced by the
common mode rejection of the sample-and-hold circuit.
Theinputsdrawonlyonesmallcurrentspikewhilecharging
the sample-and-hold capacitors at the end of conversion.
During conversion, the analog inputs draw only a small
leakage current. If the source impedance of the driving
circuit is low, then the LTC1403-1/LTC1403A-1 inputs can
be driven directly. As source impedance increases, so will
acquisition time. For minimum acquisition time with high
source impedance, a buffer amplifier must be used. The
main 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 39ns
for full throughput rate). Also keep in mind while choos-
ing an input amplifier, the amount of noise and harmonic
distortion added by the amplifier.
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
voltagespikeseenbytheamplifierfromchargingthesampling
capacitor, choose an amplifier that has a low output imped-
ance (<100Ω) at the closed-loop bandwidth frequency. For
example, if an amplifier is used with a gain of 1 and has a
unity-gainbandwidthof50MHz,thentheoutputimpedance
at 50MHz must be less than 100Ω. The second require-
ment is that the closed-loop bandwidth must be greater
than 40MHz to ensure adequate small-signal settling for
full throughput rate. If slower op amps are used, more
time for settling can be provided by increasing the time
between conversions. The best choice for an op amp to
drive the LTC1403-1/LTC1403A-1 will depend on the ap-
plication. Generally, applications fall into two categories:
AC applications where dynamic specifications are most
critical and time domain applications where DC accuracy
and settling time are most critical. The following list is
a summary of the op amps that are suitable for driving
the LTC1403-1/LTC1403A-1. (More detailed information
is available in the Linear Technology Databooks and our
website at www.linear.com.)
LTC1566-1: Low Noise 2.3MHz Continuous Time Low-
Pass Filter.
LT1630: Dual 30MHz Rail-to-Rail Voltage FB Amplifier.
2.7V to ±15V supplies. Very high AVOL, 500V offset and
520ns settling to 0.5LSB for a 4V swing. THD and noise
are –93dB to 40kHz and below 1LSB to 320kHz (AV = 1,
2VP-P into 1kΩ, VS = 5V), making the part excellent for
AC applications (to 1/3 Nyquist) where rail-to-rail perfor-
mance is desired. Quad version is available as LT1631.
LT1632: Dual 45MHz Rail-to-Rail Voltage FB Amplifier.
2.7V to ±15V supplies. Very high AVOL, 1.5mV offset and
400ns settling to 0.5LSB for a 4V swing. It is suitable for
applications with a single 5V supply. THD and noise are
–93dB to 40kHz and below 1LSB to 800kHz (AV = 1,
2VP-P into 1kΩ, VS = 5V), making the part excellent for
ACapplicationswhererail-to-railperformanceisdesired.
Quad version is available as LT1633.
LT1813: Dual 100MHz 750V/s 3mA Voltage Feedback
Amplifier. 5V to ±5V supplies. Distortion is –86dB to
100kHz and –77dB to 1MHz with ±5V supplies (2VP-P
into 500Ω). Excellent part for fast AC applications with
±5V supplies.
LT1801: 80MHz GBWP, –75dBc at 500kHz, 2mA/Ampli-
fier, 8.5nV/√Hz.
LT1806/LT1807: 325MHz GBWP, –80dBc Distortion at
5MHz, Unity-Gain Stable, R-R In and Out, 10mA/Ampli-
fier, 3.5nV/√Hz.
LT1810: 180MHz GBWP, –90dBc Distortion at 5MHz,
Unity-Gain Stable, R-R In and Out, 15mA/Amplifier,
16nV/√Hz.
LT1818/LT1819: 400MHz, 2500V/s,9mA, Single/Dual
Voltage Mode Operational Amplifier.
LT6200: 165MHz GBWP, –85dBc Distortion at 1MHz,
Unity-Gain Stable, R-R In and Out, 15mA/Amplifier,
0.95nV/√Hz.
LT6203: 100MHz GBWP, –80dBc Distortion at 1MHz,
Unity-Gain Stable, R-R In and Out, 3mA/Amplifier,
1.9nV/√Hz.
LT6600-10:Amplifier/FilterDifferentialIn/Outwith10MHz
Cutoff.
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相关代理商/技术参数 |
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| LTC1403ACMSE-1#PBF | 功能描述:IC ADC 14BIT 2.8MSPS 10-MSOP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1 系列:microPOWER™ 位数:8 采样率（每秒）:1M 数据接口:串行，SPI? 转换器数目:1 功率耗散（最大）:- 电压电源:模拟和数字 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:24-VFQFN 裸露焊盘 供应商设备封装:24-VQFN 裸露焊盘（4x4） 包装:Digi-Reel® 输入数目和类型:8 个单端，单极 产品目录页面:892 (CN2011-ZH PDF) 其它名称:296-25851-6 |
| LTC1403ACMSE-1#TR | 功能描述:IC ADC 14BIT 2.8MSPS DIFF 10MSOP RoHS:否 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1,000 系列:- 位数:16 采样率（每秒）:45k 数据接口:串行 转换器数目:2 功率耗散（最大）:315mW 电压电源:模拟和数字 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC W 包装:带卷 (TR) 输入数目和类型:2 个单端，单极 |
| LTC1403ACMSE-1#TRPBF | 功能描述:IC ADC 14BIT 2.8MSPS DIFF 10MSOP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1,000 系列:- 位数:16 采样率（每秒）:45k 数据接口:串行 转换器数目:2 功率耗散（最大）:315mW 电压电源:模拟和数字 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC W 包装:带卷 (TR) 输入数目和类型:2 个单端，单极 |
| LTC1403ACMSEPBF | 制造商:Linear Technology 功能描述:ADC,LTC1403A 14bit 2.8MSPS SPI MSOP |
| LTC1403AHMSE | 制造商:Linear Technology 功能描述:ADC Single SAR 2.8Msps 14-bit Serial 10-Pin MSOP EP |
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