Microchip Technology Audio Digital-to-Analog Converter Instrukcja Użytkownika Pobierz pdf (Strona 11)

High-Performance, Stand-Alone ADCs for a Variety of Embedded Systems Applications

10 ADC Converter Function Pack Design Guide

ADC Converter Function Pack Design Guide 11

High-Performance, Stand-Alone ADCs for a Variety of Embedded Systems Applications

These 4-1/2-digit A/D converters offer 50 ppm

(1 part in 20,000) resolution, with a maximum nonlinearity

error of 1 count. An auto-zero cycle reduces zero error to below

10 µV and zero drift to 0.5 µV/°C. Source impedance errors are

minimized by a 10 pA maximum input current. Rollover error is

limited to ±1 count.

ADC BY ARCHITECTURE – 4-DIGIT ADC WITH BCD OUTPUT

ADC Product Specifications

Part

Description

Supply

Voltage

(V)

Input Voltage

Range (V)

Resolution

(Digits)

Resolution

(Counts)

Max Power

(mW)

Data

Interface

Temp.

Range

(°C) Features Packages

TC14433A BCD A/D ±4.5 to ±5 ±199.9 mV

to 1.999V

3.5 ±2,000 20 MUXed

BCD

-40 to +85 For DMM, Data loggers 24 PDIP, 28 PLCC,

24 CerDIP

TC7135 BCD A/D ±5 V

+ 1.0V to

– 1.0V

4.5 ±20,000 30 MUXed

BCD

0 to +70 For DMM, Data loggers 28 PLCC, 28 PDIP,

64 PQFP

TC835 BCD A/D ±5 V

+ 1.0V to

– 0.5V

4.5 ±20,000 30 MUXed

BCD

0 to +70 Upgrade to TC7135 64 PQFP, 44 PQFP,

28 PDIP

Microprocessor-based measurement systems are supported

by BUSY, STROBE, and RUN/HOLD control signals. Remote

data acquisition systems with data transfer via UARTs are

also possible. The additional control pins and multiplexed

BCD outputs are ideal for display or microprocessor-based

measurement systems.

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Key Features:

n Industry standard pin-out, compatible with ICL7135,

MAX7135, SI7135

n Low Rollover Error: ±1 Count Max

n Nonlinearity Error: ±1 Count Max

n Reading for 0V Input

n True Polarity Indication at Zero for Null Detection

n Multiplexed BCD Data Output

n TTL-Compatible Outputs

n Differential Input

Control Signals Permit Interface to UARTs and Microprocessors

Key Features (Cont.)

n Blinking Display Visually Indicates Overrange Condition

n Low Input Current: 1 pA

n Low Zero Reading Drift: 2 µV/°C

n Auto-Ranging Supported with Overrange and Underrange

Applications:

n Personal Computer Data Acquisition

n Scales, Panel Meters, Process Controls

n HP-IL Bus Instrumentation

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