_______________General Description

The MAX509/MAX510 are quad, serial-input, 8-bit volt-

age-output digital-to-analog converters (DACs). They

operate with a single +5V supply or dual ±5V supplies.

Internal, precision buffers swing rail-to-rail. The refer-

ence input range includes both supply rails.

The MAX509 has four separate reference inputs, allow-

ing each DAC's full-scale range to be set independently.

20-pin DIP, SSOP, and SO packages are available. The

MAX510 is identical to the MAX509 except it has two ref-

erence inputs, each shared by two DACs. The MAX510

is housed in space-saving 16-pin DIP and SO packages.

The serial interface is double-buffered: A 12-bit input

shift register is followed by four 8-bit buffer registers and

four 8-bit DAC registers. A 12-bit serial word is used to

load data into each register. Both input and DAC regis-

ters can be updated independently or simultaneously

with single software commands. Two additional asyn-

chronous control pins provide simultaneous updating

(

LDAC) or clearing (CLR) of input and DAC registers.

compatible. A buffered data output provides for read-

back or daisy-chaining of serial devices.

____________________________Features

o Single +5V or Dual ±5V Supply Operation

o Output Buffer Amplifiers Swing Rail-to-Rail

o Reference Input Range Includes Both Supply Rails

o Calibrated Offset, Gain, and Linearity (1LSB TUE)

o 10MHz Serial Interface, Compatible with SPI, QSPI

(CPOL = CPHA = 0) and Microwire

o Double-Buffered Registers for Synchronous

Updating

o Serial Data Output for Daisy-Chaining

o Power-On Reset Clears Serial Interface and Sets

All Registers to Zero

______________Ordering Information

Ordering Information continued on last page.

* Dice are specified at +25°C, DC parameters only.

**Contact factory for availability and processing to MIL-STD-883.

Quad, Serial 8-Bit DACs

with Rail-to-Rail Outputs

________________________________________________________________

Maxim Integrated Products

1

20

19

18

17

16

15

14

13

12

11

1

2

3

4

5

6

7

8

9

10

OUTC

OUTD

REFC

REFB

OUTA

OUTB

TOP VIEW

MAX509

REFD

CS

N.C.

SCLK

DGND

N.C.

AGND

REFA

DIN

CLR

DOUT

LDAC

DIP/SO/SSOP

_________________Pin Configurations

MAX509

OUTA

DAC A

DAC B

DAC C

DAC D

REFA

REFB

DAC

REG A

DECODE

CONTROL

INPUT

REG A

DAC

REG B

INPUT

REG B

DAC

REG C

INPUT

REG C

DAC

REG D

INPUT

REG D

12-BIT

SHIFT

REGISTER

SR

CONTROL

CS DIN SCLK

REFC

REFD

OUTB

OUTC

OUTD

DOUT

LDAC

CLR

AGND

_______________Functional Diagrams

19-0155; Rev 2; 1/96

PART

TEMP. RANGE

PIN-PACKAGE

MAX509ACPP

0°C to +70°C

20 Plastic DIP

MAX509BCPP

0°C to +70°C

20 Plastic DIP

MAX509ACWP

0°C to +70°C

20 Wide SO

±1

±1 1/2

±1

MAX509BCWP

20 Wide SO

±1 1/2

MAX509ACAP

0°C to +70°C

20 SSOP

±1

0°C to +70°C

MAX509BCAP

0°C to +70°C

20 SSOP

±1 1/2

MAX509BC/D

0°C to +70°C

Dice*

±1 1/2

Pin Configurations continued at end of data sheet.

Functional Diagrams continued at end of data sheet.

TUE

(LSB)

Microwire is a trademark of National Semiconductor. SPI and QSPI are trademarks of Motorola.

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800