Rainbow-electronics MAX5157 Bedienungsanleitung PDF herunterladen

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

For small orders, phone 408-737-7600 ext. 3468.

MAX5156/MAX5157

Low-Power, Dual, 12-Bit Voltage-Output DACs

with Configurable Outputs

________________________________________________________________

Maxim Integrated Products

19-1317; Rev 1; 12/97

_______________General Description

The MAX5156/MAX5157 low-power, serial, voltage-out-

put, dual 12-bit digital-to-analog converters (DACs)

consume only 500µA from a single +5V (MAX5156) or

+3V (MAX5157) supply. These devices feature Rail-to-

Rail

output swing and are available in space-saving

16-pin QSOP and DIP packages. Access to the invert-

ing input allows for specific gain configurations, remote

sensing, and high output current capability, making

these devices ideally suited for industrial process con-

trols. These devices are also well suited for digitally

programmable (4–20mA) current loops.

The 3-wire serial interface is SPI™/QSPI™ and

Microwire™ compatible. Each DAC has a double-

buffered input organized as an input register followed

by a DAC register, which allows the input and DAC reg-

isters to be updated independently or simultaneously.

Additional features include a programmable shutdown

(2µA), hardware-shutdown lockout, a separate voltage

reference for each DAC, power-on reset, and an active-

low clear input (CL) that resets all registers and DACs to

zero. The MAX5156/MAX5157 provide a programmable

logic output pin for added functionality, and a serial-

data output pin for daisy chaining.

________________________Applications

Industrial Process Control Motion Control

Digital Offset and Gain Digitally Programmable

Adjustment 4–20mA Current Loops

Remote Industrial Controls Automatic Test Equipment

____________________________Features

♦ 12-Bit Dual DAC with Configurable Output

Amplifier

♦ Single-Supply Operation: +5V (MAX5156)

+3V (MAX5157)

♦ Rail-to-Rail Output Swing

♦ Low Quiescent Current: 500µA (normal operation)

2µA (shutdown mode)

♦ Power-On Reset Clears DAC Outputs to Zero

♦ SPI/QSPI and Microwire Compatible

♦ Space-Saving 16-Pin QSOP Package

_______________Ordering Information

Rail-to-Rail is a registered trademark of Nippon Motorola Ltd. SPI and QSPI are trademarks of Motorola, Inc.

Microwire is a trademark of National Semiconductor Corp.

Ordering Information continued at end of data sheet.

Pin Configuration appears at end of data sheet.

REFACLDOUT

16-BIT

SHIFT

CONTROL

INPUT

REG A

SCLK

UPO

REFB

DINCS

DAC A

DAC B

FBA

FBB

OUTA

OUTB

DAC

REG A

INPUT

REG B

LOGIC

OUTPUT

DECODE

CONTROL

DAC

REG B

MAX5156

MAX5157

AGND

DGNDPDL

_________________________________________________________Functional Diagram

INL

(LSB)

PIN-PACKAGETEMP. RANGEPART

±116 QSOP0°C to +70°CMAX5156BCEE

±1/2

±1

±1/2

16 QSOP

16 Plastic DIP

16 Plastic DIP0°C to +70°C

0°C to +70°C

0°C to +70°CMAX5156ACEE

MAX5156BCPE

MAX5156ACPE

1 2 3 4 5 6 ... 15 16

Inhaltsverzeichnis

Seite 1 - MAX5156/MAX5157

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.For small orders, phone 408-737-7600 ext. 3468.MAX5156/

Seite 2

MAX5156/MAX5157Power-Down ModeThe MAX5156/MAX5157 feature a software-program-mable shutdown mode that reduces the typical supplycurrent to 2µA. The tw

Seite 3

The MAX5156/MAX5157’s digital inputs are doublebuffered, which allows any of the following: loading theinput register(s) without updating the DAC regi

Seite 4

MAX5156/MAX5157Daisy Chaining DevicesAny number of MAX5156/MAX5157s can be daisychained by connecting the DOUT pin of one device to theDIN pin of the

Seite 5

__________Applications InformationUnipolar OutputFigure 9 depicts the MAX5156/MAX5157 configured forunity-gain, unipolar operation. Table 2 lists the

Seite 6

MAX5156/MAX5157Using an AC ReferenceIn applications where the reference has an AC signalcomponent, the MAX5156/MAX5157 have multiplyingcapabilities wi

Seite 7

Digital Calibration and Threshold SelectionFigure 13 shows the MAX5156/MAX5157 in a digitalcalibration application. With a bright value applied tothe

Seite 8

MAX5156/MAX5157Low-Power, Dual, 12-Bit Voltage-Output DACswith Configurable OutputsMaxim cannot assume responsibility for use of any circuitry other t

Seite 9 - Output Amplifier

MAX5156/MAX5157Low-Power, Dual, 12-Bit Voltage-Output DACswith Configurable Outputs2 _________________________________________________________________

Seite 10 - Serial Interface

MAX5156/MAX5157Low-Power, Dual, 12-Bit Voltage-Output DACswith Configurable Outputs___________________________________________________________________

Seite 11

MAX5156/MAX5157Low-Power, Dual, 12-Bit Voltage-Output DACswith Configurable Outputs4 _________________________________________________________________

Seite 12

MAX5156/MAX5157Low-Power, Dual, 12-Bit Voltage-Output DACswith Configurable Outputs___________________________________________________________________

Seite 13 - Bipolar Output

MAX5156/MAX5157Low-Power, Dual, 12-Bit Voltage-Output DACswith Configurable Outputs6 _________________________________________________________________

Seite 14 - Table 3. Bipolar Code Table

MAX5156/MAX5157Low-Power, Dual, 12-Bit Voltage-Output DACswith Configurable Outputs___________________________________________________________________

Seite 15 - Threshold Selection

MAX5156/MAX5157Low-Power, Dual, 12-Bit Voltage-Output DACswith Configurable Outputs8 _________________________________________________________________

Seite 16 - Power-Supply Considerations

_______________Detailed DescriptionThe MAX5156/MAX5157 dual, 12-bit, voltage-outputDACs are easily configured with a 3-wire serial inter-face. These d

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Inhaltsverzeichnis

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