Datasheet Linear Technology LTC2376IDE-20#PBF

Manufacturer	Linear Technology
Series	LTC2376-20
Part Number	LTC2376IDE-20#PBF

20-Bit, 250ksps, Low Power SAR ADC with 0.5ppm INL

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PDF, 1.1 Mb, Language: en, File uploaded: Aug 21, 2017, Pages: 30
20-Bit, 250ksps, Low Power SAR ADC with 0.5ppm INL

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Packaging

Package	4x3 DFN-16
Package Code	DE
Package Index	05-08-1732

Parametrics

ADC INL	0.5 LSB
ADCs	1
Architecture	SAR
Bipolar/Unipolar Input	Bipolar
Bits	20 bits
Number of Channels	1
DNL	0.2 LSB
Demo Boards	DC1925A-C
Design Tools	Linduino File
Export Control	no
Features	Digital Gain Compression
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	5.25 mW
SFDR	128 dB
SINAD	104 dB
SNR	104 dB
Simultaneous	no
Speed	250 ksps
Supply Voltage Range	2.5V
THD dB	-125 dB

Eco Plan

RoHS

Compliant

Design Notes

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DC Accurate Driver for the LTC2377-20 Achieves 2ppm Linearity &mdash DN1032
PDF, 189 Kb, File published: Jan 6, 2014
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DC Accurate Driver for the LTC2377-20 Achieves
2ppm Linearity вЂ“ Design Note 1032
Guy Hoover
Introduction
As resolution and sample rates continue to rise for
analog-to-digital converters (ADCs), the driver circuitry
for the ADC analog input, not the ADC itself, has increasingly become the limiting factor in determining
overall circuit accuracy. First, the driver circuitry must
buffer the input signal and provide gain. In addition,
it must level shift or convert a single-ended signal to
a fully differential signal to satisfy the input voltage
range and common mode requirements of the ADC.
All must be done without adding distortion to the
original signal. by the LTC2377-20 (U1). The LTC2377-20 is a 20-bit,
500ksps, low power SAR ADC with a typical integral
nonlinearity (INL) of В±0.5ppm. The voltage at AIN is
buffered by U4, which in turn drives the U5 resistor
string, acting as a precision divider. U3 operates in
a gain of minus one-half and drives the center of the
U5 resistor string to maintain the ADC common mode
voltage at VREF/2.
U3 and U4 are LTВ®1468A low offset highly linear
op amps. U5 is a LT5400A quad matched resistor …
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Low Noise, Precision Op Amp Drives High Resolution SAR ADCs &mdash DN1039
PDF, 263 Kb, File published: Aug 23, 2016
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Low Noise, Precision Op Amp Drives High Resolution
SARВ ADCs
Design Note 1039
Erjon Qirko and Kris Lokere
Introduction
The LT6018 is an ultralow noise (1.2nV/в€љHz at 1kHz)
operational amplifier with ultralow distortion (вЂ“115dB
at 1kHz). It has a gain bandwidth product of 15MHz,
maximum offset voltage of 50ВµV and a maximum
offset voltage drift of 0.5ВµV/В°C. This combination
of features makes it suitable for driving a variety of
high resolution analog-to-digital converters (ADCs).
This Design Note presents circuits and optimization
strategies to achieve the best signal-to-noise ratio
(SNR) and total harmonic distortion (THD) when
using the LT6018 to drive high speed 18-bit and 20bit successive approximation register (SAR) ADCs. LTC2378-20 stands out for its unrivaledВ 2ppm linearity
performance. The best way to create a differential
signal while maintaining linearity is by using the
precision matched resistors in the LT5400 used on
this demo board. A detailed theory of operation for
the circuit shown in Figure 1 appears in Design Note
1032 (where the LT1468 drives the LTC2377-20).
To measure the circuitвЂ™s linearity, an ultrapure sine …

Model Line

Series: LTC2376-20 (8)

LTC2376CDE-20#PBF LTC2376CDE-20#TRPBF LTC2376CMS-20#PBF LTC2376CMS-20#TRPBF LTC2376IDE-20#PBF LTC2376IDE-20#TRPBF LTC2376IMS-20#PBF LTC2376IMS-20#TRPBF

Manufacturer's Classification

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

Other Names:

LTC2376IDE-20PBF, LTC2376IDE-20 PBF, LTC2376IDE20#PBF, LTC2376IDE 20#PBF