AD5428 查看數據表（PDF） - Analog Devices

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AD5428

High Bandwidth, Multiplying DACs with Parallel Interface

Analog Devices 

Data Sheet

AD5428/AD5440/AD5447

AGND 1

IOUTA 2

RFBA 3

VREFA 4

DGND 5

DAC A/B 6

AD5447

TOP VIEW

(Not to Scale)

24 IOUTB

23 RFBB

22 VREFB

21 VDD

20 R/W

19 CS

DB11 7

18 DB0 (LSB)

DB10 8

17 DB1

DB9 9

16 DB2

DB8 10

15 DB3

DB7 11

14 DB4

DB6 12

13 DB5

Figure 6. Pin Configuration 24-Lead TSSOP (RU-24)

Table 6. AD5447 Pin Function Descriptions

Pin No. Mnemonic

Description

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 to 18 DB11 to DB0 Parallel Data Bits 11 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 the contents of the DAC register. When CS and R/W are held low, the latches are transparent.

Any changes on the data lines are reflected in the relevant DAC output.

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 9 of 32

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