TC510 Datasheet PDF ( Pinout ) - (TC5xx) PRECISION ANALOG FRONT ENDS

TC510 Datasheet PDF - TelCom Semiconductor

Part Number	*TC510*
Description	(TC5xx) PRECISION ANALOG FRONT ENDS
Manufacturers	TelCom Semiconductor
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PRECISION ANALOG FRONT ENDS

EVALUATION

KIT

AVAILABLE

TTCC55000

TTCC550000A

TTCC55110

TTCC55114

FEATURES

s Precision (up to 17 Bits) A/D Converter "Front End"

s 3-Pin Control Interface to Microprocessor

s Flexible: User Can Trade-Off Conversion Speed

for Resolution

s Single Supply Operation (TC510/514)

s 4 Input, Differential Analog MUX (TC514)

s Automatic Input Voltage Polarity Detection

s Low Power Dissipation ........... TC500/500A: 10mW

TC510/514: 18mW

s Wide Analog Input Range ....... ±4.2V (TC500A/510)

s Directly Accepts Bipolar and Differential Input

Signals

ORDERING INFORMATION

Part No.

TC500ACOE

TC500ACPE

TC500COE

TC500CPE

TC510COG

TC510CPF

TC514COI

TC514CPJ

TC500EV

Package

Temp. Range

16-Pin SOIC

0°C to +70°C

16-Pin Plastic DIP (Narrow) 0°C to +70°C

16-Pin SOIC

0°C to +70°C

16-Pin Plastic DIP (Narrow) 0°C to +70°C

24-Pin SOIC

0°C to +70°C

24-Pin Plastic DIP (300 Mil.) 0°C to +70°C

28-Pin SOIC

0°C to +70°C

28-Pin Plastic DIP (300 Mil.) 0°C to +70°C

Evaluation Kit for TC500/500A/510/514

GENERAL DESCRIPTION

The TC500/500A/510/514 family are precision analog

front ends that implement dual slope A/D converters having

a maximum resolution of 17 bits plus sign. As a minimum,

each device contains the integrator, zero crossing compara-

tor and processor interface logic. The TC500 is the base

(16 bit max) device and requires both positive and negative

power supplies. The TC500A is identical to the TC500,

except it has improved linearity allowing it to operate to a

maximum resolution of 17 bits. The TC510 adds an on-

board negative power supply converter for single supply

operation. The TC514 adds both a negative power supply

converter and a 4 input differential analog multiplexer.

Each device has the same processor control interface

consisting of 3 wires: control inputs A and B and zero-

crossing comparator output (CMPTR). The processor ma-

nipulates A, B to sequence the TC5xx through four phases

of conversion: Auto Zero, Integrate, Deintegrate and Inte-

grator Zero. During the Auto Zero phase, offset voltages in

the TC5xx are corrected by a closed-loop feedback mecha-

nism. The input voltage is applied to the integrator during the

Integrate phase. This causes an integrator output dv/dt

directly proportional to the magnitude of the input voltage.

The higher the input voltage, the greater the magnitude of

the voltage stored on the integrator during this phase. At the

start of the Deintegrate phase, an external voltage reference

is applied to the integrator, and at the same time, the external

host processor starts its on-board timer. The processor

FUNCTIONAL BLOCK DIAGRAM

CH1 +

CH2 +

CH3 +

CH4 +

CH1 –

CH2 –

CH3 –

CH4 –

ACOM

OSC

A0 A1

DIF.

MUX

(TC514)

CR+EF

CREF

VR+EF

VR–EF

CR–EF

RINT

CINT

CAZ

BUF CAZ

CINT

CONTROL LOGIC

B CONVERTER STATE

0 ZERO INTEGRATOR OUTPUT

1 AUTO-ZERO

0 SIGNAL INTEGRATE

1 DEINTEGRATE

SWR SWR

SWI

SWR–I SWR+I

BUFFER

–

INTEGRATOR

– CMPTR 1

–

TC500

TC500A

TC510

CMPTR 2 TC514

–

LEVEL

+ SHIFT

CMPTR

OUTPUT

SWZ

SWR+I SWR–I

SWIZ SWZ

POLARITY

DETECTION

SW1

SWI

DC-TO-DC

CONVERTER

(TC510 & TC514)

ANALOG

SWITCH

CONTROL

SIGNALS

VO–UT CAP– CAP+

PHASE

DECODING

LOGIC

DGND

1.0µF

CO–UT

1.0µF

VSS

(TC500

TC500A)

CONTROL LOGIC

TC500/A/510/514-3 10/3/96 TelCom Semiconductor reserves the right to make changes in the circuitry1and specifications of its devices.

www.DataSheet4U.com

PRECISION ANALOG FRONT ENDS

TC500

TC500A

TC510

TC514

PIN DESCRIPTION

Pin No. Pin No.

(TC500, 500A) (TC510)

2 Not Used

10 15

11 16

12 18

13 17

14 19

15 23

16 21

Pin No.

(TC514)

Not Used

Symbol Description

CINT

VSS

CAZ

BUF

ACOM

CR–EF

CR+ EF

VR– EF

VR+ EF

VI–N

VI+N

CMPTR OUT

DGND

VDD

CAP+

CAP–

VO– UT

OSC

CH1+

CH1–

CH2+

CH2–

CH3+

CH3–

CH4+

Integrator output. Integrator capacitor connection.

Negative power supply input (TC500/500A only).

Auto-zero input. The Auto-zero capacitor connection.

Buffer output. The Integrator capacitor connection.

This pin is grounded in most applications. It is recommended that

ACOM and the input common pin (VI–N or C–HN ) be within the

analog common mode range (CMR).

Input. Negative reference capacitor connection.

Input. Positive reference capacitor connection.

Input. External voltage reference (–) connection.

Input. External voltage reference (+) connection.

Negative analog input.

Positive analog input.

Input. Converter phase control MSB. (See input B.)

Input. Converter phase control LSB. The states of A, B place the

TC5xx in one of four required phases. A conversion is complete

when all four phases have been executed:

00: Integrator Zero

Phase control input pins: AB =

01: Auto Zero

10: Integrate

11: Deintegrate

Zero crossing comparator output. CMPTR is HIGH during the

Integration phase when a positive input voltage is being integrated

and is LOW when a negative input voltage is being integrated. A

HIGH-to-LOW transition on CMPTR signals the processor that the

Deintegrate phase is completed. CMPTR is undefined during the

Auto-Zero phase. It should be monitored to time the Integrator Zero

phase (see text).

Input. Digital ground.

Input. Power supply positive connection.

Input. Negative power supply converter capacitor (+) connection.

Input. Negative power supply converter capacitor (–) connection.

Output. Negative power supply converter output and reservoir

capacitor connection. This output can be used to power other

devices in the circuit requiring a negative bias voltage.

Oscillator control input. The negative power supply converter normally

runs at a frequency of 100kHz. The converter oscillator frequency can

be slowed down (to reduce quiescent current) by connecting an

external capacitor between this pin and VDD. (See Typical Character-

istics Curves).

Positive analog input pin. MUX channel 1.

Negative analog input pin. MUX channel 1.

Positive analog input pin. MUX channel 2.

Negative analog input pin. MUX channel 2.

Positive analog input pin. MUX channel 3.

Negative analog input pin. MUX channel 3.

Positive analog input pin. MUX channel 4.

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TC510 Datasheet PDF - TelCom Semiconductor

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