Rainbow-electronics MAX5251 Manual de usuario descargar pdf

__________________General Description

The +3V MAX5251 combines four low-power, voltage-

output, 10-bit digital-to-analog converters (DACs) and

four precision output amplifiers in a space-saving, 20-

pin package. In addition to the four voltage outputs,

each amplifier’s negative input is also available to the

user. This facilitates specific gain configurations, remote

sensing, and high output drive capacity, making the

MAX5251 ideal for industrial-process-control applica-

tions. Other features include software shutdown, hard-

ware shutdown lockout, an active-low reset that clears

all registers and DACs to zero, a user-programmable

logic output, and a serial-data output.

Each DAC has a double-buffered input organized as an

input register followed by a DAC register. A 16-bit serial

word loads data into each input/DAC register. The

3-wire serial interface is compatible with SPI™/QSPI™

and Microwire™. It allows the input and DAC registers to

be updated independently or simultaneously with a sin-

gle software command. All logic inputs are TTL/CMOS-

logic compatible.

________________________Applications

Digital Offset and Gain Adjustment

Microprocessor-Controlled Systems

Industrial Process Controls

Automatic Test Equipment

Remote Industrial Controls

Motion Control

______________________________Features

♦ Four 10-Bit DACs with Configurable

Output Amplifiers

♦ +3.0V to +3.6V Single-Supply Operation

♦ Low Supply Current: 0.8mA Normal Operation

3µA Shutdown Mode

♦ Available in 20-Pin SSOP

♦ Power-On Reset Clears all Registers and

DACs to Zero

♦ SPI/QSPI and Microwire Compatible

♦ Simultaneous or Independent Control of DACs

via 3-Wire Serial Interface

♦ User-Programmable Digital Output

♦ Schmitt-Trigger Digital Inputs for Direct

Optocoupler Interface

♦ 12-Bit Upgrade Available: MAX5253

MAX5251

+3V, Quad, 10-Bit Voltage-Output DAC

with Serial Interface

________________________________________________________________

Maxim Integrated Products

MAX5251

OUTA

FBA

FBB

FBC

FBD

DAC A

DAC B

DAC C

DAC D

REFAB

DAC 

DECODE

CONTROL

INPUT

DAC 

INPUT

DAC 

INPUT

DAC 

INPUT

16-BIT

SHIFT

SR

CONTROL

LOGIC

OUTPUT

DIN

SCLK

OUTB

OUTC

OUTD

DOUT

PDL

AGND

DGND

UPO REFCD

_________________________________________________________________________Functional Diagram

19-1172; Rev 0; 12/96

PART

MAX5251ACPP

MAX5251BCPP 0°C to +70°C

0°C to +70°C

TEMP. RANGE PIN-PACKAGE

20 Plastic DIP

_________________Ordering Information

Ordering Information continued on last page.

Pin Configuration appears at end of data sheet.

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

INL

(LSB)

±1/2

±1

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

MAX5251ACAP

MAX5251BCAP 0°C to +70°C

0°C to +70°C 20 SSOP

20 SSOP

±1/2

±1

1 2 3 4 5 6 ... 15 16

Indice de contenidos

Pagina 1 - Maxim Integrated Products

__________________General DescriptionThe +3V MAX5251 combines four low-power, voltage-output, 10-bit digital-to-analog converters (DACs) andfour preci

Pagina 2 - ELECTRICAL CHARACTERISTICS

MAX5251Figure 5 shows the serial-interface timing requirements.The chip-select pin (CS) must be low to enable theDAC’s serial interface. When CS is hi

Pagina 3