DAC0890 datasheet(7/12 Pages) NSC

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Connection Diagram

Dual-In-Line Package

TLH10592 – 2

Pin Description

DB0 – DB7 (1 – 8) These pins are data inputs for each of the

internal 8-bit DACs DB0 is the least-sig-

nificant-bit

WR (9)

This is the WRITE command input pin

This input is used in conjunction with CS1

and CS2 to write data into either of the

internal DACs The data is latched into a

selected DAC with the rising edge of ei-

ther WR or CS1 for DAC1 or CS2 for

DAC2 whichever occurs first

CS1 (10)

This is the input pin used to select DAC1

This input is used in conjunction with the

WR input to write data into either of the

internal DACs The data is latched into

DAC1 with the rising edge of either CS1 or

WR whichever occurs first

CS2 (11)

This is the input pin used to select DAC2

This input is used in conjunction with the

WR input to write data into either of the

internal DACs The data is latched into

DAC2 with the rising edge of either CS2 or

WR whichever occurs first

DGND (12)

The system digital ground is connected to

this pin For proper operation this and

AGND must be connected together

SENSE 2 (13)

DAC2’s output sense connection When

this pin is connected to the VOUT2’s load

impedance the feedback loop will com-

pensate for any voltage drops between

the VOUT2 pin and the load

VOUT2 (14)

DAC2’s voltage output connection It pro-

vides two full-scale output voltage ranges

255V and 102V

SELECT 2 (15)

The two output voltage ranges available

from DAC2 are selected by connecting

this pin to SENSE2 for the 255V full-scale

range and leaving it unconnected for the

102V full-scale range

AGND (16)

The system digital ground is connected to

this pin For proper operation this and

DGND must be connected together

SELECT 1 (17)

The two output voltage ranges available

from DAC1 are selected by connecting

this pin to SENSE1 for he 255V full-scale

range and leaving it unconnected for the

102V full-scale range

VOUT1 (18)

DAC1’s voltage output connection It pro-

vides two full-scale output voltage ranges

255V and 102V

SENSE 1 (19)

DAC1’s output sense connection When

this pin is connected to the VOUT1’s load

impedance the feedback loop will com-

pensate for any voltage drops between

the VOUT1 pin and the load

Va (20)

The power supply voltage ranging from

475V to 165V is applied to this pin It

should be bypassed to AGND with a 001

01 mF ceramic capacitor in parallel

with a 22 E 22 mF electrolytic capacitor

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