AD5428 データシートの表示（PDF） - Analog Devices

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AD5428

High Bandwidth, Multiplying DACs with Parallel Interface

Analog Devices 

AD5428/AD5440/AD5447

Data Sheet

AGND 1

IOUTA 2

RFBA 3

VREFA 4

DGND 5

DAC A/B 6

AD5440

TOP VIEW

(Not to Scale)

24 IOUTB

23 RFBB

22 VREFB

21 VDD

20 R/W

19 CS

DB9 7

18 NC

DB8 8

17 NC

DB7 9

16 DB0 (LSB)

DB6 10

15 DB1

DB5 11

14 DB2

DB4 12

13 DB3

NC = NO CONNECT

Figure 5. Pin Configuration 24-Lead TSSOP (RU-24)

Table 5. AD5440 Pin Function Descriptions

Pin No. Mnemonic Function

1

AGND

DAC Ground Pin. This pin should typically be tied to the analog ground of the system, but can be biased to

achieve single-supply operation.

2, 24

3, 23

IOUTA, IOUTB

RFBA, RFBB

DAC Current Outputs.

DAC Feedback Resistor Pins. Establish voltage output for the DAC by connecting to an external amplifier

output.

4, 22

5

VREFA, VREFB

DGND

DAC Reference Voltage Input Terminals.

Digital Ground Pin.

6

DAC A/B

Selects DAC A or DAC B. Low selects DAC A; high selects DAC B.

7 to16 DB9 to DB0 Parallel Data Bits 9 Through 0.

19

CS

Chip Select Input. Active low. Used in conjunction with R/W to load parallel data to the input latch or to read

data from the DAC register.

20

R/W

Read/Write. When low, used in conjunction with CS to load parallel data. When high, used in conjunction with

CS to read back contents of the DAC register.

21

VDD

Positive Power Supply Input. This part can be operated from a supply of 2.5 V to 5.5 V.

Rev. C | Page 8 of 32

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