MB88346L Просмотр технического описания (PDF) - Fujitsu

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MB88346L

D/A Converter for Digital Tuning (12-channel, 8-bit, on-chip OP amp, low-voltage)

Fujitsu 

MB88346L

■ PIN DESCRIPTION

Pin No.

Symbol

17

DI

14

DO

16

CLK

15

LD

18

AO1

19

AO2

2

AO3

3

AO4

4

AO5

5

AO6

6

AO7

7

AO8

8

AO9

9

AO10

12

AO11

13

AO12

11

VCC

20

GND

10

VDD

1

VSS

I/O

Function

Serial address/data input to the internal 12-bit shift register : The ad-

I

dress/data format is that upper 4 bits (D11 to D8) indicate an address

and lower 8 bits (D7 to D0) indicate data. The D11 (MSB) is the first-

in bit and D0 (LSB) is the last-in bit.

O

Outputs MSB bit data from 12-bit shift register.

Shift clock input to the internal 12-bit shift register : At the rising edge

I

of CLK data on the DI pin is shifted into the LSB of the shift register

and contents of the shift register are shifted right (to the MSB) .

Load strobe input for a 12-bit address/data : A high level on the LD pin

latches a 4-bit address (upper 4 bits : D11 to D8) of the internal 12-bit

I

shift register into the internal address decoder, and writes 8-bit data

(lower 8 bits : D7 to D0) of the shift register into an internal data latch

selected by the latched address.

O

8-bit D/A output pins with OP amps.

⎯

MCU interface and OP amp power supply pin.

⎯

MCU interface and OP amp ground pin.

⎯

D/A converter power supply pin.

⎯

D/A converter ground pin.

3

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