LTC2451CDDB#PBF datasheet, PDF

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LTC2451CDDB#PBF: Description1-Channel Single ADC Delta-Sigma 60sps 16-bit Serial 8-Pin DFN EP T/R; File Size793KB，20 Pages; ManufacturerADI; Websitehttps://www.analog.com

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LTC2451CDDB#PBF Overview

1-Channel Single ADC Delta-Sigma 60sps 16-bit Serial 8-Pin DFN EP T/R

LTC2451CDDB#PBF Parametric

Parameter Name	Attribute value
EU restricts the use of certain hazardous substances	Compliant
ECCN (US)	0
Part Status	Unconfirmed
HTS	8542.39.00.01
Converter Type	Temperature Measurement
Architecture	Delta-Sigma
Resolution	16bit
Number of ADCs	1
Number of Input Channels	1
Sampling Rate	60sps
Digital Interface Type	Serial (2-Wire, I2C)
Input Type	Voltage
Input Signal Type	Single-Ended
Voltage Reference	External
Polarity of Input Voltage	Unipolar
Voltage Supply Source	Single
Input Voltage	5.5V
Minimum Single Supply Voltage (V)	2.7
Typical Single Supply Voltage (V)	3.3\|5
Maximum Single Supply Voltage (V)	5.5
Typical Power Dissipation (mW)	1.2
Integral Nonlinearity Error	10LSB
Full Scale Error	4LSB
No Missing Codes (bit)	16
Sample and Hold	No
Single-Ended Input	Yes
Digital Supply Support	No
Minimum Operating Temperature (°C)	0
Maximum Operating Temperature (°C)	70
Packaging	Tape and Reel
Supplier Temperature Grade	Commercial
Pin Count	8
Standard Package Name	DFN
Supplier Package	DFN EP
Mounting	Surface Mount
Package Height	0.75(Max)
Package Length	3
Package Width	2
PCB changed	8
Lead Shape	No Lead

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FEATURES

LTC2451

Ultra-Tiny, 16-Bit

∆∑

ADC

with I

C Interface

DESCRIPTION

The LTC

2451 is an ultra-tiny, 16-bit, analog-to-digital

converter. The LTC2451 uses a single 2.7V to 5.5V sup-

ply, accepts a single-ended analog input voltage and

communicates through an I

C interface. The converter

is available in an 8-pin, 3mm × 2mm DFN or TSOT-23

package. It includes an integrated oscillator that does not

require any external components. It uses a delta-sigma

modulator as a converter core and provides single-cycle

settling time for multiplexed applications. The LTC2451

includes a proprietary input sampling scheme that re-

duces the average input sampling current several orders

of magnitude lower than conventional ∆∑ converters.

The LTC2451 is capable of up to 60 conversions per

second and, due to the very large oversampling ratio,

has extremely relaxed antialiasing requirements. In the

30Hz mode, the LTC2451 includes continuous internal

offset calibration algorithms which are transparent to the

user, ensuring accuracy over time and over the operating

temperature range. The converter has external REF

and

REF

–

pins and the input voltage can range from V

REF–

REF+

. If V

REF+

= V

and V

REF–

= GND, the input voltage

can range from GND to V

Following a single conversion, the LTC2451 can auto-

matically enter sleep mode and reduce its power to less

than 0.2µA. If the user reads the ADC once per second,

the LTC2451 consumes an average of less than 50µW

from a 2.7V supply.

Integral Nonlinearity, V

= 3V

2.7V TO 5.5V

0.1µF

10µF

INL (LSB)

–1

= – 45°C, 25°C

–2

2451 TA01a

GND to V

Single-Ended Input Range

0.02LSB RMS Noise

2LSB INL, No Missing Codes

1LSB Offset Error

4LSB Full-Scale Error

Programmable 30/60 Conversions per Second

Single Conversion Settling Time for Multiplexed

Applications

Single-Cycle Operation with Auto Shutdown

400µA Supply Current

0.2µA Sleep Current

Internal Oscillator—No External Components Required

Single Supply, 2.7V to 5.5V Operation

2-Wire I

C Interface

Ultra-Tiny 3mm × 2mm DFN or TSOT-23 Package

APPLICATIONS

System Monitoring

Environmental Monitoring

Direct Temperature Measurements

Instrumentation

Industrial Process Control

Data Acquisition

Embedded ADC Upgrades

LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear

Technology Corporation. No Latency ∆∑ and Easy Drive are trademarks of Linear Technology

Corporation. All other trademarks are the property of their respective owners. Protected by U.S.

Patents, including 6208279, 6411242, 7088280, 7164378.

TYPICAL APPLICATION

SENSOR

0.1µF

REF

SCL

SDA

2-WIRE I

INTERFACE

LTC2451

REF

–

GND

= 90°C

–3

0.5

1.5

INPUT VOLTAGE (V)

2.5

2451 TA01b

2451fg

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