LTC2453IDDB-TRPBF datasheet(6/18 Pages) LINER

Part #	LTC2453IDDB-TRPBF

Description	Ultra-Tiny, Differential, 16-Bit ?誇 ADC With I2C Interface

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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LTC2453

6

2453fb

BLOCK DIAGRAM

PIN FUNCTIONS

GND (Pin 1): Ground. Connect to a ground plane through

a low impedance connection.

REF– (Pin 2), REF+ (Pin 3):

Differential Reference Input.

The voltage on these pins can have any value between

GND and VCC as long as the reference positive input, REF+,

remains more positive than the negative reference input,

REF–, by at least 2.5V. The differential reference voltage

(VREF = REF+ to REF–) sets the full-scale range.

VCC (Pin 4): Positive Supply Voltage. Bypass to GND

(Pin 1) with a 10μF capacitor in parallel with a low-se-

ries-inductance 0.1μF capacitor located as close to the

part as possible.

IN– (Pin 5), IN+ (Pin 6):

Differential Analog Input.

SCL (Pin 7): Serial Clock Input of the I2C Interface. The

LTC2453 can only act as a slave and the SCL pin only ac-

cepts external serial clock. Data is shifted into the SDA pin

on the rising edges of SCL and output through the SDA

pin on the falling edges of SCL.

SDA (Pin 8): Bidirectional Serial Data Line of the I2C

Interface. The conversion result is output through the

SDA pin. The pin is high impedance unless the LTC2453

is in the data output mode. While the LTC2453 is in the

data output mode, SDA is an open drain pull down (which

requires an external 1.7k pull-up resistor to VCC).

Exposed Pad (Pin 9, DFN Only): Ground. Must be soldered

to PCB ground.

16-BIT Δ∑

A/D CONVERTER

DECIMATING

SINC FILTER

SCL

REF+

VCC

REF–

IN+

IN–

GND

SDA

2453 BD

–

16-BIT Δ∑

A/D CONVERTER

I2C

INTERFACE

INTERNAL

OSCILLATOR

3

4

7

8

1

2

6

5

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LTC2453IDDB-TRPBF Datasheet(PDF) 6 Page - Linear Technology

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