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TELCOM SEMICONDUCTOR, INC.

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TC530

TC534

5V PRECISION DATA ACQUISITION SUBSYSTEMS

EVALUATION

KIT

AVAILABLE

TC530/534-3 11/14/96

FEATURES

s

Precision (up to 17 Bits) A/D Converter

s

3 Wire Serial Port

s

Flexible: User Can Trade-Off Conversion Speed

Against Resolution

s

Single Supply Operation

s

–5V Output Pin

s

4 Input, Differential Analog MUX (TC534)

s

Automatic Input Polarity and Overrange Detection

s

Low Operating Current ............................ 5mA Max

s

Wide Analog Input Range ......................

s

Cost Effective

ORDERING INFORMATION

Part No.

Package

Temp. Range

TC530COI

28-Pin SOIC

0

°C to +70°C

TC530CPJ

28-Pin Plastic DIP (300 Mil.)

0

°C to +70°C

TC534CKW

44-Pin PQFP

0

°C to +70°C

TC534CPL

40-Pin Plastic DIP

0

°C to +70°C

TC530EV

Evaluation Kit for TC530/534

FUNCTIONAL BLOCK DIAGRAM

GENERAL DESCRIPTION

The TC530/534 are serial analog data acquisition sub-

systems ideal for high precision measurements (up to 17 bits

plus sign). The TC530 consists of a dual slope integrating

A/D converter, negative power supply generator and 3 wire

serial interface port. The TC534 is identical to the TC530, but

adds a four channel differential input multiplexer. Key A/D

converter operating parameters (Auto Zero and Integration

time) are programmable, allowing the user to trade-off

conversion time for resolution.

Data conversion is initiated when the RESET input is

brought low. After conversion, data is loaded into the output

shift register and EOC is asserted indicating new data is

available. The converted data (plus Overrange and polarity

bits) is held in the output shift register until read by the

processor, or until the next conversion is completed allowing

the user to access data at any time.

The TC530/534 timebase can be derived from an exter-

nal crystal of 2MHz (max), or from an external frequency

source. The TC530/534 requires a single 5V power supply

and features a – 5V, 10mA output which can be used to

supply negative bias to other components in the system.

A0 A1

EOC

R/W

OSC

RESET

CAP

+

CAP

–

TC05

TC530

TC534

TC534

(Only)

(TC530 Only)

DC-TO-DC

CONVERTER

State

Machine

Serial Port

Negative

Supply Output

Oscillator

(

÷ 4)

Dual Slope A/D Converter

.01

µF

0.01

µF

Optional

Power-On

Reset Cap

100k

10k

+5V

DIF.

MUX

(TC534

Only)

CH1

CH1

CH2

CH2

CH3

CH3

CH4

CH4

IN

IN

AB

CMPTR

BUF

INT

+

–

+

–

ACOM

–

–

–

–

–

+

+

+

+

+

+

–