SP9604 datasheet(4/11 Pages) SIPEX

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SP9604DS/03

SP9604 Quad, 12-Bit, Low Power Voltage Output D/A Converter

PIN ASSIGNMENTS

Pin 1 — V

OUT 4 — Voltage Output from DAC4.

Pin 2 — V

SS — –5V Power Supply Input.

Pin 3 — V

DD — +5V Power Supply Input.

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 presented to the DAC(s)

unchanged;alogic“0”selectsthe8–bitmode,andthe

four LSBs are connected to the four MSBs, allowing

an 8–bit MSB–justified interface.

Pins 8 and 9 — A

0 & A1

— Address for DAC

Selection. A

1/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 conjunction

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

from the input registers to the DAC registers. 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 conjunction

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.

Pin 14 — V

OUT1 — Voltage Output from DAC1.

Pin 15 — V

OUT2 — Voltage Output from DAC2.

Pin 16 — DB

11 — Data Bit 11; Most Significant Bit.

Pin 17 — DB

10 — Data Bit 10.

Pin 18 — DB

9 — Data Bit 9.

Pin 19 — DB

8 — Data Bit 8.

Pin 20 — DB

7 — Data Bit 7.

Pin 21 — DB

6 — Data Bit 6.

Pin 22 — DB

5 — Data Bit 5.

Pin 23 — DB

4 — Data Bit 4.

Pin 24 — DB

3 — Data Bit 3.

Pin 25 — DB

2 — Data Bit 2.

Pin 26 — DB

1 — Data Bit 1.

Pin 27 — DB

0 — Data Bit 0; LSB

Pin 28 — V

OUT3 — Voltage Output from DAC3.

PINOUT — 28–PIN PLASTIC DIP & SOIC

VOUT4

VSS

VDD

CLR

REF IN

GND

B1/B2

XFER

WR2

WR1

VOUT1

VOUT3

DB0

DB1

DB2

DB3

DB4

DB5

DB6

DB7

DB8

DB9

DB10

DB11

VOUT2

SP9604

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