TC3400 datasheet(1/16 Pages) MICROCHIP

Part #	TC3400

Description	1.8V, Low Power, 16-Bit Sigma-Delta A/D Converter

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Manufacturer	MICROCHIP [Microchip Technology]

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DS21409B-page 1

TC3400

Features

• 16-bit Resolution at Eight Conversions Per

Second, Adjustable Down to 10-bit Resolution at

512 Conversions Per Second

• 1.8V – 5.5V Operation, Low Power Operating

260

µA; Sleep: 0.75µA

• microPort™ Serial Bus Requires only two

Interface Lines

• Uses Internal or External Reference

• Automatically Enters Sleep Mode when not in use

Applications

• Consumer Electronics, Thermostats, CO

Monitors, Humidity Meters, Security Sensors

• Embedded Systems, Data Loggers, Portable

Equipment

• Medical Instruments

Device Selection Table

Package Type

General Description

The TC3400 is a low cost, low power analog-to-digital

converter based on Microchip’s Sigma-Delta technol-

ogy. It will perform 16-bit conversions (15-bit plus sign)

at up to eight per second. The TC3400 is optimized for

use as a microcontroller peripheral in low cost, battery

operated systems. A voltage reference is included, or

an external reference can be used.

The TC3400’s 2-wire microPort™ digital interface is

used for starting conversions and for reading out the

data. Driving the SCLK line low starts a conversion.

After the conversion starts, each additional falling edge

(up to six) detected on SCLK for t4 seconds reduces

the A/D resolution by one bit and cuts conversion time

in half. After a conversion is completed, clocking the

SCLK line puts the MSB through LSB of the resulting

data word onto the SDAT line, much like a shift register.

The part automatically sleeps when not performing a

data conversion.

TheTC3400isavailable ina8-Pin PDIP anda8-Pin

SOIC package.

Part Number

Package

Temperature

Range

TC3400VPA

8-Pin PDIP (Narrow)

0

°Cto +85°C

TC3400VOA

8-Pin SOIC (Narrow)

0

°Cto +85°C

IN-

REFIN

IN+

1

2

3

4

8

7

6

5

TC3400

8-Pin SOIC

8-Pin PDIP

GND

SDAT

SCLK

REFOUT

VDD

IN-

REFIN

IN+

1

2

3

4

8

7

6

5

TC3400

GND

SDAT

SCLK

REFOUT

VDD

+1.8V, Low Power, 16-Bit Sigma-Delta A/D Converter

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