Datasheet Linear Technology LTC2449

Manufacturer	Linear Technology
Series	LTC2449

24-Bit High Speed 8-/16-Channel Delta Sigma ADCs with Selectable Speed/Resolution

Datasheets

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PDF, 350 Kb, Language: en, File uploaded: Aug 21, 2017, Pages: 30
24-Bit High Speed 8-/16-Channel ∆∑ ADCs with Selectable Speed/Resolution

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Packaging

	LTC2449CUHF#PBF	LTC2449CUHF#TRPBF	LTC2449IUHF#PBF	LTC2449IUHF#TRPBF
N	1	2	3	4
Package	5x7 QFN-38 Package Outline Drawing	5x7 QFN-38 Package Outline Drawing	5x7 QFN-38 Package Outline Drawing	5x7 QFN-38 Package Outline Drawing
Package Code	UHF	UHF	UHF	UHF
Package Index	05-08-1701	05-08-1701	05-08-1701	05-08-1701
Pin Count	38	38	38	38

Parametrics

Parameters / Models	LTC2449CUHF#PBF	LTC2449CUHF#TRPBF	LTC2449IUHF#PBF	LTC2449IUHF#TRPBF
ADC INL, LSB	83.8	83.8	83.8	83.8
ADCs	1	1	1	1
Architecture	Delta Sigma	Delta Sigma	Delta Sigma	Delta Sigma
Bipolar/Unipolar Input	Unipolar	Unipolar	Unipolar	Unipolar
Bits, bits	24	24	24	24
Number of Channels	16	16	16	16
DNL, LSB	1	1	1	1
Demo Boards	DC742B,DC1410A-B	DC742B,DC1410A-B	DC742B,DC1410A-B	DC742B,DC1410A-B
Design Tools	Linduino File	Linduino File	Linduino File	Linduino File
Export Control	no	no	no	no
Features	No Latency, MUXOUT/ADCIN, 50Hz & 60Hz Rejection	No Latency, MUXOUT/ADCIN, 50Hz & 60Hz Rejection	No Latency, MUXOUT/ADCIN, 50Hz & 60Hz Rejection	No Latency, MUXOUT/ADCIN, 50Hz & 60Hz Rejection
I/O	Serial SPI	Serial SPI	Serial SPI	Serial SPI
INL ppm, ppm	5	5	5	5
Input Drive	Differential, Single-Ended	Differential, Single-Ended	Differential, Single-Ended	Differential, Single-Ended
Input Span	В±VREF/2, 0V to VREF/2 (COM=GND), 0V to VREF (COM=VREF/2)	В±VREF/2, 0V to VREF/2 (COM=GND), 0V to VREF (COM=VREF/2)	В±VREF/2, 0V to VREF/2 (COM=GND), 0V to VREF (COM=VREF/2)	В±VREF/2, 0V to VREF/2 (COM=GND), 0V to VREF (COM=VREF/2)
Internal Reference	no	no	no	no
Operating Temperature Range, °C	0 to 70	0 to 70	-40 to 85	-40 to 85
Power, mW	40	40	40	40
Simultaneous	no	no	no	no
Speed, ksps	8	8	8	8
Supply Voltage Range	4.5V to 5.5V	4.5V to 5.5V	4.5V to 5.5V	4.5V to 5.5V

Eco Plan

	LTC2449CUHF#PBF	LTC2449CUHF#TRPBF	LTC2449IUHF#PBF	LTC2449IUHF#TRPBF
RoHS	Compliant	Compliant	Compliant	Compliant

Other Options

LTC2444 LTC2444 LTC2445 LTC2445 LTC2448 LTC2448

Design Notes

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True Rail-to-Rail, High Input Impedance ADC Simplifies Precision Measurements &mdash DN400
PDF, 150 Kb, File published: Oct 4, 2006
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advertisement True Rail-to-Rail, High Input Impedance ADC Simplifies
Precision Measurements вЂ“ Design Note 400
Mark Thoren
Introduction
High input impedance and a wide input range are two
highly desirable features in a precision analog-to-digital
converter, and the LTCВ®2449 delta-sigma ADC has both.
With just a few external components, the LTC2449 forms
an exceptional measurement system with very high input
impedance and an input range that extends 300mV beyond
the supply rails.
A designer may trade off the LTC2449вЂ™s 200nV resolution
for faster conversion rates, but otherwise the LTC2449
requires few to no performance tradeoffs. It simultaneously achieves 1ppm linearity (Figure 2), 200nV input
resolution and a 5V input span. Ten п¬Ѓlter oversample
ratios are available, providing data rates from 6.8 samples
per second to 3500 samples per second. Normal mode
rejection of 50Hz and 60Hz is better than 87dB in the 6.8sps
mode. All DC speciп¬Ѓcations hold for all speedsвЂ”only the
resolution changes. Such persistent high performance
simpliп¬Ѓes the design of otherwise challenging applications, such as 6-digit voltmeters, sensor interfaces, and industrial control. In addition, the LTC2449 digital
interface and timing are extremely simple, and the No
Latency architecture eliminates concerns about п¬Ѓlter …

Model Line

Series: LTC2449 (4)

LTC2449CUHF#PBF LTC2449CUHF#TRPBF LTC2449IUHF#PBF LTC2449IUHF#TRPBF

Manufacturer's Classification

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