VECANA01 datasheet(8/17 Pages) TI1

Part #	VECANA01

Description	10-Channel, 12-Bit DATA ACQUISITION SYSTEM

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Manufacturer	TI1 [Texas Instruments]

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VECANA01

8

SBAS155

SH1

MUX1

MUX2

MUX6

MUX7

MUX3

MUX4

MUX5

SH2

SH6

SH7

SH4

SH5

2.5V

Ref

SH3

Input Setup

Register

ADC3

Control

Logic

NPSH

Conv

Sample

IVP/N

B1P/N

B2P/N

2

IWP/N

AN1P/N

AN2P/N

2

AN3P/N

2

REFOUT

REFIN

IUP/N

A1P/N

2

NPSH

2

PGA3

AN1 Through AN3

IW Only

2

ADC2

PGA2

2

ADC1

PGA1

2

Decoder

DAC

8-Bit

8

2

3

2

ADOUT1

ADOUT2

ADOUT3

ADIN

DAOUT

NPSH

ADCLK

ADCONV

ADBUSY

DATACLK

2

A2P/N

2

Input

Select

Gain

Select

Conv

DAC

Input

Ref

2

U_COMP

2

U_ILIM

A_1

A_2

V_COMP

B_1

B_2

W_COMP

V_ILIM

W_ILIM

DAIN

2

FIGURE 1. Functional Diagram.

FUNCTIONAL DESCRIPTION

The VECAN01 is a triple 12-bit SAR A/D converter that

operates from dual

±5V power supplies. The part contains

three 12-bit successive approximation ADCs, multiplexer

for 10 fully differential inputs, 5 differential input synchro-

nized sample-and-hold amplifiers, plus two asynchronous

sample-and-hold amplifier. It communicates over three syn-

chronous SPI/SSI serial output and one input ports. The

VECANA01 operates on external clock that also determines

the output data rate (see Figure 2).

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