- 您现在的位置：买卖IC网 > PDF目录39418 > LTC2378IMS-16#TRPBF (LINEAR TECHNOLOGY CORP) 1-CH 16-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO16 PDF资料下载
参数资料
| 型号： | LTC2378IMS-16#TRPBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | ADC |
| 英文描述： | 1-CH 16-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO16 |
| 封装： | LEAD FREE, PLASTIC, MSOP-16 |
| 文件页数： | 2/24页 |
| 文件大小： | 755K |
| 代理商： | LTC2378IMS-16#TRPBF |
LTC2378-16
10
237816f
OVERVIEW
TheLTC2378-16isalownoise,lowpower,highspeed16-bit
successive approximation register (SAR) ADC. Operating
from a single 2.5V supply, the LTC2378-16 supports a
large and flexible ±VREF fully differential 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 LTC2378-16 achieves ±0.5LSB INL max, no
missing codes at 16 bits and 97dB SNR.
Fast 1Msps throughput with no cycle latency makes the
LTC2378-16 ideally suited for a wide variety of high speed
applications.Aninternaloscillatorsetstheconversiontime,
easingexternaltimingconsiderations.TheLTC2378-16dis-
sipates only 13.5mW at 1Msps, while an auto power-down
feature is provided to further reduce power dissipation
during inactive periods.
The LTC2378-16 features a unique digital gain compres-
sion(DGC)function,whicheliminatesthedriveramplifier’s
negative supply while preserving the full resolution of the
ADC. When enabled, the ADC performs a digital scaling
function that maps zero-scale code from 0V to 0.1 VREF
and full-scale code from VREF to 0.9 VREF. For a typical
reference voltage of 5V, the full-scale input range is now
0.5V to 4.5V, which provides adequate headroom for
powering the driving amplifier from a single 5.5V supply.
CONVERTER OPERATION
The LTC2378-16 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 differential analog input voltage. A rising
edge on the CNV pin initiates a conversion. During the
conversionphase,the16-bitCDACissequencedthrougha
successiveapproximationalgorithm,effectivelycomparing
the sampled input with binary-weighted fractions of the
referencevoltage(e.g.VREF/2,VREF/4…VREF/65536)using
the differential comparator. At the end of conversion, the
CDAC output approximates the sampled analog input. The
ADC control logic then prepares the 16-bit digital output
code for serial transfer.
applicaTions inForMaTion
Figure 2. LTC2378-16 Transfer Function
INPUT VOLTAGE (V)
0V
OUTPUT
CODE
(TWO’S
COMPLEMENT)
–1
LSB
237816 F02
011...111
011...110
000...001
000...000
100...000
100...001
111...110
1
LSB
BIPOLAR
ZERO
111...111
FSR/2 – 1LSB
–FSR/2
FSR = +FS – –FS
1LSB = FSR/65536
TRANSFER FUNCTION
The LTC2378-16 digitizes the full-scale voltage of 2
× REF
into 216 levels, resulting in an LSB size of 152V with
REF = 5V. The ideal transfer function is shown in Figure 2.
The output data is in 2’s complement format.
RON
40
CIN
45pF
RON
40
REF
CIN
45pF
IN+
IN–
BIAS
VOLTAGE
237816 F03
Figure 3. The Equivalent Circuit for the
Differential Analog Input of the LTC2378-16
ANALOG INPUT
The analog inputs of the LTC2378-16 are fully differential
in order to maximize the signal swing that can be digitized.
The analog inputs can be modeled by the equivalent circuit
shown in Figure 3. The diodes at the input provide ESD
protection. In the acquisition phase, each input sees ap-
proximately 45pF (CIN) from the sampling CDAC in series
with 40 (RON) from the on-resistance of the sampling
switch. Any unwanted signal that is common to both
inputs will be reduced by the common mode rejection of
the ADC. The inputs draw a current spike while charging
the CIN capacitors during acquisition. During conversion,
the analog inputs draw only a small leakage current.
相关PDF资料 |
PDF描述 |
|---|---|
| LTC2378IDE-16#TRPBF | 1-CH 16-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO16 |
| LTC2378IDE-16#PBF | 1-CH 16-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO16 |
| LTC2378CMS-16#PBF | 1-CH 16-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO16 |
| LTC2378HMS-16#TRPBF | 1-CH 16-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO16 |
| LTC2378CDE-16#TRPBF | 1-CH 16-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO16 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC2378IMS-18#PBF | 功能描述:IC ADC 18BIT 1MSPS 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 |
| LTC2378IMS-18#TRPBF | 功能描述:IC ADC 18BIT 1MSPS 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 |
| LTC2378IMS-20#PBF | 制造商:Linear Technology 功能描述:IC ADC 20BIT 1MSPS 16MSOP 制造商:Linear Technology 功能描述:ADC 2.5-5.1V 20BIT 1MSPS SPI 16MSOP 制造商:Linear Technology 功能描述:MS-ADC/General Purpose, 20-Bit, 1Msps, 104dB SNR, 0.5pmm INL, 21mW, SAR ADC with |
| LTC2378IMS-20#TRPBF | 制造商:Linear Technology 功能描述:IC ADC 20BIT 1MSPS 16MSOP 制造商:Linear Technology 功能描述:ADC, 20BIT, 1MSPS, SPI, MSOP-16, Resolution (Bits):20bit, Sampling Rate:1MSPS, Supply Voltage Type:Single, Supply Voltage Min:2.375V, Supply Voltage Max:2.625V, Supply Current:8.4mA, Digital IC Case Style:MSOP, No. of Pins:16 , RoHS Compliant: Yes 制造商:Linear Technology 功能描述:MS-ADC/General Purpose, 20-Bit, 1Msps, 104dB SNR, 0.5pmm INL, 21mW, SAR ADC with |
| LTC2379CDE-18#PBF | 功能描述:IC ADC 18BIT SPI/SRL 16DFN 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 |
发布紧急采购，3分钟左右您将得到回复。