SP9504 查看數據表（PDF） - Signal Processing Technologies

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SP9504

Quad, 12–Bit, Voltage Output D/A Converter

Signal Processing Technologies 

PIN ASSIGNMENTS

Pin 1 — VOUT 4 — Voltage Output from DAC4.

Pin 2 — V — –5V Power Supply Input.

SS

Pin 3 — V — +5V Power Supply Input.

DD

Pin 4 — CLR — Clear. Gated with WR2 (pin

11). Active low. Clears all DAC outputs to 0V.

Pin 5 — REF IN — Reference Input for DACs.

Pin 6 — GND — Ground.

Pin 7 — B1/B2 — Byte 1/Byte 2 — Selects

Data Input Format. A logic “1” on pin 7 selects

the 12–bit mode, and all 12 data bits are pre-

sented to the DAC(s) unchanged; a logic “0”

selects the 8–bit mode, and the four LSBs are

connected to the four MSBs, allowing an 8–bit

MSB–justified interface.

Pins 8 and 9 — A0 & A1 — Address for DAC

Selection. A1/A0 = 0/0 = DAC1; 0/1 = DAC2; 1/

0 = DAC3; 1/1 = DAC4.

Pin 10 — XFER — Transfer. Gated with WR2

(pin 11); loads all DAC registers simultaneously.

Active low.

Pin 11 — WR2 — Write Input 2 — In conjunc-

tion with XFER (pin 10), controls the transfer of

data from the input registers to the DAC regis-

ters. In conjunction with CLR (pin 4), the DAC

registers are forced to 1000 0000 0000 and the

DAC outputs will settle to 0V. Active low.

Pin 12 — WR1 — Write Input1 — In conjunc-

tion with CS (pin 13), enables input register

selection, and controls the transfer of data from

the input bus to the input registers. Active low.

Pin 13 — CS — Chip Select — Enables writing data

to input registers and/or transferring data from input

bus to DAC registers. Active low.

PINOUT — 28–PIN PLASTIC DIP & SOIC

VOUT4 1

VSS 2

VDD 3

CLR 4

REF IN 5

GND 6

B1/B2 7

A0 8

A1 9

XFER 10

WR2 11

WR1 12

CS 13

VOUT1 14

SP9504

28 VOUT3

27 DB0

26 DB1

25 DB2

24 DB3

23 DB4

22 DB5

21 DB6

20 DB7

19 DB8

18 DB9

17 DB10

16 DB11

15 VOUT2

Pin 14 — VOUT1 — Voltage Output from DAC1.

Pin 15 — V — Voltage Output from DAC2.

OUT2

Pin 16 — DB11 — Data Bit 11; Most Significant Bit.

Pin 17 — DB10 — Data Bit 10.

Pin 18 — DB9 — Data Bit 9.

Pin 19 — DB8 — Data Bit 8.

Pin 20 — DB7 — Data Bit 7.

Pin 21 — DB6 — Data Bit 6.

Pin 22 — DB — Data Bit 5.

5

Pin 23 — DB — Data Bit 4.

4

Pin 24 — DB — Data Bit 3.

3

Pin 25 — DB2 — Data Bit 2.

Pin 26 — DB1 — Data Bit 1.

Pin 27 — DB0 — Data Bit 0; LSB

Pin 28 — VOUT3 — Voltage Output from DAC3.

SP9504DS/03

SP9504 Quad, 12-Bit, Voltage Output D/A Converter

4

© Copyright 2000 Sipex Corporation

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