Rainbow-electronics MAX5253 Bedienungsanleitung PDF herunterladen

__________________General Description

The MAX5253 combines four low-power, voltage-output,

12-bit digital-to-analog converters (DACs) and four pre-

cision output amplifiers in a space-saving, 20-pin pack-

age. 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

MAX5253 ideal for industrial-process-control applica-

tions. Other features include software shutdown, hard-

ware shutdown lockout, an active-low reset which 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 serial

interface is compatible with SPI™/QSPI™ and

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

updated independently or simultaneously with a single

software command. The DAC registers can be simulta-

neously updated via the 3-wire serial interface. All logic

inputs are TTL/CMOS-logic compatible.

________________________Applications

Industrial Process Controls

Automatic Test Equipment

Digital Offset and Gain Adjustment

Motion Control

Remote Industrial Controls

Microprocessor-Controlled Systems

______________________________Features

♦ Four 12-Bit DACs with Configurable

Output Amplifiers

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

♦ Low Supply Current: 0.82mA Normal Operation

3µA Shutdown Mode

♦ Reference Inputs are High Impedance in Shutdown

♦ 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

MAX5253

+3V, Quad, 12-Bit Voltage-Output DAC

with Serial Interface

________________________________________________________________

Maxim Integrated Products

MAX5253

OUTA

FBA

FBB

FBC

FBD

DAC A

DAC B

DAC C

DAC D

REFAB

DAC A

DECODE

CONTROL

INPUT

DAC B

INPUT

DAC C

INPUT

DAC D

INPUT

16-BIT

SHIFT

SR

CONTROL

LOGIC

OUTPUT

DIN

SCLK

OUTB

OUTC

OUTD

DOUT

PDL

AGND

DGND

UPO REFCD

_________________________________________________________________________Functional Diagram

19-1123; Rev 0; 9/96

PART

MAX5253ACPP

MAX5253BCPP 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.

MAX5253ACAP

MAX5253BCAP 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

Inhaltsverzeichnis

Seite 1 - Maxim Integrated Products

__________________General DescriptionThe MAX5253 combines four low-power, voltage-output,12-bit digital-to-analog converters (DACs) and four pre-cisio

Seite 2 - ELECTRICAL CHARACTERISTICS

MAX5253Figure 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

Seite 3

Power-Down Lockout (PDL)The power-down lockout pin PDL disables softwareshutdown when low. When in shutdown, transitioningPDL from high to low wakes u

Seite 4 - TIMING CHARACTERISTICS

MAX5253+3V, Quad, 12-Bit Voltage-Output DAC with Serial Interface12 __________________________________________________________________________________

Seite 5 - = +3.3V, T

__________Applications InformationUnipolar OutputFor a unipolar output, the output voltages and the refer-ence inputs have the same polarity. Figure 9

Seite 6 - MAX5253-13

MAX5253Using an AC Reference In applications where the reference has AC signal com-ponents, the MAX5253 has multiplying capability withinthe reference

Seite 7

Power-Supply Considerations On power-up, all input and DAC registers are cleared(set to zero code) and DOUT is in Mode 0 (serial datais shifted out of

Seite 8 - Shutdown Mode

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses arei

Seite 9 - Serial-Interface Description

MAX5253+3V, Quad, 12-Bit Voltage-Output DAC with Serial Interface2 ___________________________________________________________________________________

Seite 10 - Serial-Data Output (DOUT)

MAX5253+3V, Quad, 12-Bit Voltage-Output DACwith Serial Interface______________________________________________________________________________________

Seite 11 - Daisy-Chaining Devices

0-4-8-12-16-20100 560k 1.12M 1.68M 2.24M 2.8MMAX5253-06RELATIVE OUTPUT (dB)REFERENCE VOLTAGE INPUTFREQUENCY RESPONSEFREQUENCY (Hz)REFAB SWEPT 0.67V

Seite 12

MAX5253+3V, Quad, 12-Bit Voltage-Output DACwith Serial Interface______________________________________________________________________________________

Seite 13 - Bipolar Output

10µs/divMAJOR-CARRY TRANSITIONMAX5253-07OUTB,AC COUPLED50mV/divCS5V/div VREF = 1.25V, RL = 5kΩ, CL = 100pF2µs/divOUTA,AC COUPLED10mV/divDIGITAL F

Seite 14 - Using an AC Reference

MAX5253+3V, Quad, 12-Bit Voltage-Output DACwith Serial Interface______________________________________________________________________________________

Seite 15 - Power-Supply Considerations

MAX5253+3V, Quad, 12-Bit Voltage-Output DAC with Serial Interface8 ___________________________________________________________________________________

Seite 16 - SMALL-OUTLINE

In shutdown mode, the MAX5253 output amplifiers andthe reference inputs enter a high-impedance state. Theserial interface remains active. Data in the

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Rainbow-electronics MAX5253 Bedienungsanleitung

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Inhaltsverzeichnis

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