Datasheet Linear Technology LTC2508IDKD-32#PBF — Datenblatt

Hersteller	Linear Technology
Serie	LTC2508-32
Artikelnummer	LTC2508IDKD-32#PBF

32-Bit-ADC mit Überabtastung und konfigurierbarem Digitalfilter

Datenblätter

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PDF, 1.4 Mb, Sprache: en, Datei hochgeladen: Aug 21, 2017, Seiten: 36
32-Bit Over-Sampling ADC with Configurable Digital Filter

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Verpackung

Package	7x4 DFN-24
Package Code	DKD
Package Index	05-08-1864

Parameter

ADC INL	2147 LSB
ADCs	1
Architecture	SAR with Digital Filter
Bipolar/Unipolar Input	Unipolar, Bipolar
Bits	32 bits
Number of Channels	1
Demo Boards	DC2222A-B
Design Tools	Linduino File
Export Control	no
Features	Integrated Digital Filter, No Latency 14-Bit 1Msps Output
I/O	Serial SPI
Input Drive	Fully Differential
Input Span	В±2.5V to В±5.1V
Internal Reference	no
Operating Temperature Range	-40 to 85 °C
Power	24 mW
SFDR	118 dB
SINAD	145 dB
SNR	145 dB
Simultaneous	no
Speed	1000 ksps
Supply Voltage Range	2.5
THD dB	-118 dB

Öko-Plan

RoHS

Compliant

Konstruktionshinweise

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Reference Filter Increases 32-Bit ADC SNR by 6dB &mdash DN568
PDF, 242 Kb, Datei veröffentlicht: Sep 26, 2017
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Reference Filter Increases 32-Bit ADC SNR by 6dB
Design Note 568
Guy Hoover
Introduction
Attaining optimal SNR performance from an ADC isnвЂ™t
just a matter of providing a low noise signal to the ADCвЂ™s
input. Providing a low noise reference voltage is just
as important. While reference noise has no effect at
zero-scale, at full-scale any noise on the reference will
be visible in the output code. This is why dynamic range
(DR) which is measured at zero-scale is usually several
dB better for a given ADC than the signal-to-noise ratio
(SNR) which is measured at or near full-scale. Providing
a low noise reference voltage is particularly important
in an oversampling application where itвЂ™s possible for
the ADCвЂ™s SNR to exceed 140dB. To achieve an SNR
at this level, even the best low noise references need
some help to reduce their noise levels.
There are several alternatives that can reduce reference
noise. Increasing the size of the bypass capacitor or
using a simple lowpass RC filter on the reference output
are not good alternatives. A large bypass capacitor on
the reference output by itself cannot produce a low …

Modellreihe

Serie: LTC2508-32 (4)

LTC2508CDKD-32#PBF LTC2508CDKD-32#TRPBF LTC2508IDKD-32#PBF LTC2508IDKD-32#TRPBF

Herstellerklassifikation

Data Conversion > Analog-to-Digital Converters (ADC) > Precision ADCs (Fs < 10Msps) > Single Channel ADCs

Andere Namen:

LTC2508IDKD-32PBF, LTC2508IDKD-32 PBF, LTC2508IDKD32#PBF, LTC2508IDKD 32#PBF

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