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General Description

The DS8102 is a stand-alone, dual-channel, delta-

sigma modulator that converts measurements from two

differential analog input pairs into a Manchester-encod-

ed output bit stream that can be processed by a com-

panion microcontroller such as the MAXQ3108. One

channel operates at a fixed 1x gain, while the other

operates at a pin-selectable gain of 1x, 4x, 16x, or 32x.

The DS8102 includes an internal power-supply monitor,

on-board voltage reference, and low-power oscillator to

reduce the number of external components required for

data acquisition.

The Manchester-encoded output from the DS8102

combines pulse-density-modulated measurement val-

ues from both differential input channels with a syn-

chronization bit stream and is transmitted over a single

pin. This transmission scheme is ideal for split voltage

domain applications where the DS8102 and other “hot”-

side components must be electrically isolated from

“cold” low-voltage components such as a companion

microcontroller. In this type of application, the DS8102

can be capacitively coupled to a companion microcon-

troller with only two connection points required

(MNOUT and DGND).

The MAXQ3108 dual-core microcontroller, which

includes specialized Manchester bit-stream decoding

inputs and sinc3 filters, is specifically designed to act

as a companion microcontroller for up to three DS8102

devices. This configuration, which supports up to six

differential analog input channels, is well suited for

three-phase electricity-metering applications.

Applications

Single-Phase Electricity Metering

Three-Phase Electricity Metering

Power-Line Conditioning

Electrochemical and Optical Sensors

Industrial Control

Data-Acquisition Systems and Data Loggers

Features

♦ Dual Delta-Sigma 2nd-Order Modulators

Channel 0: Pin-Selectable Gain of 1x, 4x, 16x,

or 32x

Channel 1: Fixed Gain of 1x

♦ Selectable Internal or External Voltage Reference

♦ Manchester-Encoded Bit Stream Output

Includes Synchronization Bits to Allow Clock

Recovery

Single-Pin Transmission Scheme Simplifies

Electrical Isolation Using Capacitive Coupling

♦ Selectable Internal or External Clock Source

♦ Integrated Low-Power 8MHz Oscillator

♦ Operating Mode

Active Mode (8MHz, V

= 3.6V): 3.5mA

DS8102

Dual Delta-Sigma Modulator and Encoder

________________________________________________________________

Maxim Integrated Products

TOP VIEW

TSSOP

134 MNOUTAN1-

143 RSTV

REF

152

APDREF

AGND

161V

DGND

107

AN0+

116

G1AN0-

CLKSELV

125

CLKIO

AN1+

DS8102

Pin Configuration

Ordering Information

Rev 1; 2/09

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

Denotes a lead(Pb)-free/RoHS-compliant package.

PART TEMP RANGE PIN-PACKAGE

DS8102+ -40°C to +85°C 16 TSSOP

Typical Operating Circuit appears at end of data sheet.

MAXQ is a trademark of Maxim Integrated Products, Inc.

1 2 3 4 5 6 7 8 9

Resumo do Conteúdo

Página 1 - Ordering Information

General DescriptionThe DS8102 is a stand-alone, dual-channel, delta-sigma modulator that converts measurements from twodifferential analog input pairs

Página 2 - ELECTRICAL CHARACTERISTICS

DS8102Dual Delta-Sigma Modulator and Encoder2 _______________________________________________________________________________________ABSOLUTE MAXIMUM

Página 3

DS8102Dual Delta-Sigma Modulator and Encoder_______________________________________________________________________________________ 3ELECTRICAL CHARAC

Página 4 - Pin Description

DS8102Dual Delta-Sigma Modulator and Encoder4 _______________________________________________________________________________________Pin DescriptionPI

Página 5 - Detailed Description

DS8102Dual Delta-Sigma Modulator and Encoder_______________________________________________________________________________________ 5Detailed Descript

Página 6 - Configuration Inputs

DS8102Dual Delta-Sigma Modulator and Encoder6 _______________________________________________________________________________________Once the power su

Página 7 - Definitions

DS8102Dual Delta-Sigma Modulator and Encoder_______________________________________________________________________________________ 7Internal/External

Página 8 - Package Information

DS8102Dual Delta-Sigma Modulator and Encoder8 _______________________________________________________________________________________134 MNOUTAN1-143

Página 9 - Revision History

DS8102Dual Delta-Sigma Modulator and EncoderMaxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Ma

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Rainbow-electronics DS8102 Manual do Utilizador

Consulte online ou descarregue Manual do Utilizador para Sensores Rainbow-electronics DS8102. Rainbow Electronics DS8102 User Manual Manual do Utilizador

Resumo do Conteúdo

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