- 您现在的位置：买卖IC网 > PDF目录10091 > LTC2368IDE-18#TRPBF (Linear Technology)IC ADC 18BIT 1M 1CH 16DFN PDF资料下载
参数资料
| 型号： | LTC2368IDE-18#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 2/24页 |
| 文件大小： | 0K |
| 描述： | IC ADC 18BIT 1M 1CH 16DFN |
| 产品培训模块： | LTC2369- 18-/16-bit Pseudo-Differential SAR ADC Family Overview |
| 标准包装： | 2,500 |
| 位数： | 18 |
| 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）： | 15.8mW |
| 电压电源： | 模拟和数字 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-WFDFN 裸露焊盘 |
| 供应商设备封装： | 16-DFN（4x3） |
| 包装： | 带卷 (TR) |
| 输入数目和类型： | 1 个伪差分，单极 |
| 配用： | DC1813A-F-ND - BOARD SAR ADC LTC2368-18 |
LTC2368-18
10
236818f
OVERVIEW
TheLTC2368-18isalownoise,lowpower,highspeed18-bit
successive approximation register (SAR) ADC. Operating
from a single 2.5V supply, the LTC2368-18 supports a
0V to VREF pseudo-differential unipolar input range with
VREF ranging from 2.5V to 5.1V, making it ideal for high
performance applications which require a wide dynamic
range. The LTC2368-18 achieves ±2.5LSB INL max, no
missing codes at 18 bits and 97dB SNR.
Fast 1Msps throughput with no cycle latency makes the
LTC2368-18 ideally suited for a wide variety of high speed
applications.Aninternaloscillatorsetstheconversiontime,
easingexternaltimingconsiderations.TheLTC2368-18dis-
sipates only 13.5mW at 1Msps, while an auto power-down
feature is provided to further reduce power dissipation
during inactive periods.
CONVERTER OPERATION
The LTC2368-18 operates in two phases. During the ac-
quisition phase, the charge redistribution capacitor D/A
converter (CDAC) is connected to the IN+ and IN– pins to
sample the pseudo-differential analog input voltage. A ris-
ing edge on the CNV pin initiates a conversion. During the
conversionphase,the18-bitCDACissequencedthrougha
successiveapproximationalgorithm,effectivelycomparing
the sampled input with binary-weighted fractions of the
reference voltage (e.g. VREF/2, VREF/4 … VREF/262144)
using the differential comparator. At the end of conver-
sion, the CDAC output approximates the sampled analog
input. The ADC control logic then prepares the 18-bit
digital output code for serial transfer.
TRANSFER FUNCTION
The LTC2368-18 digitizes the full-scale voltage of REF
into 218 levels, resulting in an LSB size of 19V with
REF = 5V. The ideal transfer function is shown in Figure2.
The output data is in straight binary format.
APPLICATIONS INFORMATION
Figure 2. LTC2368-18 Transfer Function
Figure 3. The Equivalent Circuit for the
Differential Analog Input of the LTC2368-18
ANALOG INPUT
TheanaloginputsoftheLTC2368-18arepseudo-differential
in order to reduce any unwanted signal that is common
to both inputs. The analog inputs can be modeled by the
equivalentcircuitshowninFigure3.Thediodesattheinput
provide ESD protection. In the acquisition phase, each
input sees approximately 45pF (CIN) from the sampling
CDAC in series with 40Ω (RON) from the on-resistance
of the sampling switch. The IN+ input draws a current
spike while charging the CIN capacitor during acquisition.
During conversion, the analog inputs draw only a small
leakage current.
INPUT VOLTAGE (V)
0V
OUTPUT
CODE
236818 F02
111...111
111...110
111...101
111...100
000...001
000...000
000...010
000...011
1
LSB
UNIPOLAR
ZERO
FS – 1LSB
1LSB = FS/262144
RON
40
CIN
45pF
RON
40
REF
CIN
45pF
IN+
IN–
BIAS
VOLTAGE
236818 F03
相关PDF资料 |
PDF描述 |
|---|---|
| IDT72V211L15J | IC FIFO SYNC 512X9 15NS 32-PLCC |
| VI-B0X-MY | CONVERTER MOD DC/DC 5.2V 50W |
| VI-B3B-IV-F1 | CONVERTER MOD DC/DC 95V 150W |
| IDT72V215L20TF | IC FIFO SYNC 512X18 20NS 64STQFP |
| VI-B0V-MY | CONVERTER MOD DC/DC 5.8V 50W |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC2368IMS-16#PBF | 功能描述:IC ADC 16BIT SPI/SRL 1M 16-MSOP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 其它有关文件:TSA1204 View All Specifications 标准包装:1 系列:- 位数:12 采样率（每秒）:20M 数据接口:并联 转换器数目:2 功率耗散（最大）:155mW 电压电源:模拟和数字 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-TQFP 供应商设备封装:48-TQFP（7x7） 包装:Digi-Reel® 输入数目和类型:4 个单端，单极；2 个差分，单极 产品目录页面:1156 (CN2011-ZH PDF) 其它名称:497-5435-6 |
| LTC2368IMS-16#PBF | 制造商:Linear Technology 功能描述:ADC 16BIT 1MSPS SPI MSOP-16 |
| LTC2368IMS-16#TRPBF | 功能描述:IC ADC 16BIT SPI/SRL 1M 16-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:- 位数:14 采样率（每秒）:83k 数据接口:串行，并联 转换器数目:1 功率耗散（最大）:95mW 电压电源:双 ± 工作温度:0°C ~ 70°C 安装类型:通孔 封装/外壳:28-DIP（0.600"，15.24mm） 供应商设备封装:28-PDIP 包装:管件 输入数目和类型:1 个单端，双极 |
| LTC2368IMS-18#PBF | 功能描述:IC ADC 18BIT 1M 1CH 16MSOP 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:- 位数:14 采样率（每秒）:83k 数据接口:串行，并联 转换器数目:1 功率耗散（最大）:95mW 电压电源:双 ± 工作温度:0°C ~ 70°C 安装类型:通孔 封装/外壳:28-DIP（0.600"，15.24mm） 供应商设备封装:28-PDIP 包装:管件 输入数目和类型:1 个单端，双极 |
| LTC2368IMS-18#TRPBF | 功能描述:IC ADC 18BIT 1M 1CH 16MSOP 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:- 位数:14 采样率（每秒）:83k 数据接口:串行，并联 转换器数目:1 功率耗散（最大）:95mW 电压电源:双 ± 工作温度:0°C ~ 70°C 安装类型:通孔 封装/外壳:28-DIP（0.600"，15.24mm） 供应商设备封装:28-PDIP 包装:管件 输入数目和类型:1 个单端，双极 |
发布紧急采购，3分钟左右您将得到回复。