Datasheet Linear Technology LTC2353-18

Manufacturer	Linear Technology
Series	LTC2353-18

Buffered Dual, 18-Bit, 550ksps/Ch Differential ±10.24V ADC with 30VP-P Common Mode Range

Datasheets

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PDF, 2.2 Mb, Language: en, File uploaded: Mar 27, 2018, Pages: 38
Buffered Dual, 18-Bit, 550ksps/Ch Differential ±10.24V ADC with 30VP-P Common Mode Range

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Packaging

	LTC2353CLX-18#PBF	LTC2353HLX-18#PBF	LTC2353ILX-18#PBF
N	1	2	3
Package	7mm x 7mm LQFP-48 Package Outline Drawing	7mm x 7mm LQFP-48 Package Outline Drawing	7mm x 7mm LQFP-48 Package Outline Drawing
Package Code	LX	LX	LX
Package Index	05-08-1760	05-08-1760	05-08-1760
Pin Count	48	48	48

Parametrics

Parameters / Models	LTC2353CLX-18#PBF	LTC2353HLX-18#PBF	LTC2353ILX-18#PBF
ADC INL, LSB	1	1	1
ADCs	1	1	1
Architecture	SAR	SAR	SAR
Bipolar/Unipolar Input	Bipolar, Unipolar	Bipolar, Unipolar	Bipolar, Unipolar
Bits, bits	18	18	18
Number of Channels	2	2	2
DNL, LSB	0.3	0.3	0.3
Demo Boards	DC2365A-C ,DC2365A-G	DC2365A-C ,DC2365A-G	DC2365A-C ,DC2365A-G
Export Control	no	no	no
Features	Buffered Inputs, Simultaneous Sampling, SoftSpan	Buffered Inputs, Simultaneous Sampling, SoftSpan	Buffered Inputs, Simultaneous Sampling, SoftSpan
I/O	Serial SPI, Serial LVDS	Serial SPI, Serial LVDS	Serial SPI, Serial LVDS
INL ppm, ppm	1	1	1
Input Drive	Differential, Single Ended	Differential, Single Ended	Differential, Single Ended
Input Span	В±10.24V, 0V to 10.24V, В±5.12V, 0V to 5.12V nn В±12.5V, 0V to 12.5V, В±6.25V, 0V to 6.25V	В±10.24V, 0V to 10.24V, В±5.12V, 0V to 5.12V nn В±12.5V, 0V to 12.5V, В±6.25V, 0V to 6.25V	В±10.24V, 0V to 10.24V, В±5.12V, 0V to 5.12V nn В±12.5V, 0V to 12.5V, В±6.25V, 0V to 6.25V
Internal Reference	yes	yes	yes
Operating Temperature Range, °C	0 to 70	-40 to 125	-40 to 85
Power, mW	187	187	187
SFDR, dB	112	112	112
SINAD, dB	96.2	96.2	96.2
SNR, dB	96.4	96.4	96.4
Simultaneous	yes	yes	yes
Speed, ksps	550	550	550
Supply Voltage Range	2.375V to 5.25V	2.375V to 5.25V	2.375V to 5.25V
THD dB, dB	-110	-110	-110

Eco Plan

	LTC2353CLX-18#PBF	LTC2353HLX-18#PBF	LTC2353ILX-18#PBF
RoHS	Compliant	Compliant	Compliant

Application Notes

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Buffered ADC Family Eliminates Signal Conditioning Complexity &mdash AN167
PDF, 1.3 Mb, File published: 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. …

Model Line

Series: LTC2353-18 (3)

LTC2353CLX-18#PBF LTC2353HLX-18#PBF LTC2353ILX-18#PBF

Manufacturer's Classification

Data Conversion > Analog-to-Digital Converters (ADC) > Precision ADCs (Fs < 10Msps) > Simultaneous Sampling ADCs | Multi Channel ADCs