Datasheet Linear Technology LTC2348ILX-18#PBF — 数据表

制造商	Linear Technology
系列	LTC2348-18
零件号	LTC2348ILX-18#PBF

具有宽输入共模范围的八通道，18位，200ksps差分±10.24V输入SoftSpan ADC

数据表

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PDF, 1.7 Mb, 语言: en, 文件上传: Aug 20, 2017, 页数: 40
Octal, 18-Bit, 200ksps Differential ±10.24V Input SoftSpan ADC with Wide Input Common Mode Range

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价格

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Package	7mm x 7mm LQFP-48
Package Code	LX
Package Index	05-08-1760

参数化

ADC INL	0.75 LSB
ADCs	1
Architecture	SAR
Bipolar/Unipolar Input	True Bipolar, Unipolar
Bits	18 bits
Number of Channels	8
DNL	0.2 LSB
Demo Boards	DC2094A-A
Design Tools	Linduino File
Export Control	no
Features	Simultaneous Sampling
I/O	Serial LVDS, Serial SPI
Input Drive	Differential with wide input common mode, Pseudo-Differential
Input Span	В±10.24V, 0V to 10.24V, В±5.12V, 0V to 5.12V
Internal Reference	yes
Operating Temperature Range	-40 to 85 °C
Power	140 mW
SFDR	110 dB
SINAD	96.5 dB
SNR	96.7 dB
Simultaneous	yes
Speed	200 ksps
Supply Voltage Range	5V
THD dB	-109 dB

生态计划

RoHS

Compliant

应用须知

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Buffered ADC Family Eliminates Signal Conditioning Complexity &mdash AN167
PDF, 1.3 Mb, 档案已发布: Sep 20, 2017
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Application Note 167
September 2017
Buffered ADC Family Eliminates
Signal Conditioning Complexity
Joe Sousa, Andrew Thomas, Clement Wagner, Mark Thoren
Engineers often assume that analog-to-digital converter
inputs are high impedance. Direct-sampling SAR ADC
inputs will often be high impedance when not converting, but will draw вЂњspikesвЂќ of current at the beginning
of sample acquisition. On average, this behavior can be
modeled as a crude nonlinear resistance that is inversely
proportional to the sample capacitor size and sample rate,
but instantaneously the signal chain must be able to settle
completely in response to this abuse before acquisition
ends and a conversion begins. Coupling a signal chain to an ADC is an art form, often requiring a combination of theory
and experimentation. By contrast, the LTC2358 family of
multi-channel, buffered high voltage SAR ADCs offers
truly high impedance inputs that simplify or eliminate the
need for signal conditioning in many cases. When signal
conditioning is required, it can be directly connected to
the LTC2358 inputs without regard to its ability to drive
a switched capacitor. The following circuits show some
applications that take advantage of the properties of the
LTC2358 inputs. …

设计须知

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Micropower Op Amp Drives 8-Channel 18-Bit Simultaneous Sampling ADC without Compromising Accuracy or Breaking the Power Budget &mdash DN541
PDF, 417 Kb, 档案已发布: Jun 23, 2015
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Micropower Op Amp Drives 8-Channel 18-Bit Simultaneous
Sampling ADC without Compromising Accuracy or Breaking
the Power Budget
Design Note 541
Guy Hoover
Introduction
The op amps used to drive 18-bit analog-to-digital
converters (ADCs) typically draw as much supply
current as the ADC itself, often with a maximum offset
spec that is well above that of the ADC. If multiple ADC
channels are required, the power dissipation from these
drivers quickly rises to unacceptable levels. consumption drops to 45mW (typical) by using the
deviceвЂ™s NAP mode.
The LT6020 is a dual micropower, 5V/Вµs precision
rail-to-rail output op amp with input offset voltage of
less than 30ВµV (maximum) that draws only 100ВµA per
amplifier (maximum).
The circuit of Figure 1 shows the LT6020 op amp
configured as a noninverting buffer driving the analog
inputs of the LTC2348-18. Maximum power dissipation
of each op amp is only 3mW. For all eight channels
this adds up to only 24mW, approximately half the
ADC power consumption at 10ksps. If 18-bit precision is required (SNR, THD, VOS), but …

模型线

系列: LTC2348-18 (3)

LTC2348CLX-18#PBF LTC2348HLX-18#PBF LTC2348ILX-18#PBF

制造商分类

Data Conversion > Analog-to-Digital Converters (ADC) > Precision ADCs (Fs < 10Msps) > Simultaneous Sampling ADCs | Multi Channel ADCs
Space & Harsh Environment > Extended Temperature Plastic (H & MP) > Extended Temperature (H & MP) ADCs

其他名称:

LTC2348ILX-18PBF, LTC2348ILX-18 PBF, LTC2348ILX18#PBF, LTC2348ILX 18#PBF

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