AD7538JR datasheet(7/16 Pages) AD

Numer części	AD7538JR

Szczegółowy opis	LC2MOS Microprocessor-Compatible 14-Bit DAC

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AD7538

Rev. B | Page 7 of 16

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

VREF 1

RFB 2

IOUT 3

AGND 4

VSS

24

VDD

23

WR

22

CS

21

DGND 5

(MSB) DB13 6

DB12 7

LDAC

20

DB0 (LSB)

19

DB1

18

DB11 8

DB2

17

DB10 9

DB3

16

DB9 10

DB4

15

DB8 11

DB5

14

DB7 12

DB6

13

AD7538

TOP VIEW

(Not to Scale)

Figure 3. Pin Configuration

Table 5. Pin Function Description

Pin No.

Mnemonic

Description

1

VREF

Voltage Reference.

2

RFB

Feedback Resistor. Used to close the loop around an external op amp.

3

IOUT

Current Output Terminal.

4

AGND

Analog Ground

5

DGND

Digital Ground.

6 to 19

DB13 to DB0

Data Inputs. Bit DB13 (MSB) to Bit DB0 (LSB).

20

LDAC

Chip Select Input. Active low.

21

CS

Asynchronous Load DAC Input. Active low.

22

WR

Write Input. Active low.

CS

LDAC

WR

Operation

0

1

0

Load input register.

1

0

X1

Load DAC register from input register.

0

Input and DAC registers are transparent.

1

X1

No operation.

X

1

No operation.

23

VDD

+12 V to +15 V Supply Input.

24

VSS

Bias pin for high temperature low leakage configuration. To implement low leakage system, the pin should be

at a negative voltage. See Figure 6 and Figure 8 for recommended circuitry.

1 X = don’t care.

Podobny numer części - AD7538JR

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