Rainbow-electronics MAX5139 Instrukcja Użytkownika Pobierz pdf

General Description

The MAX5138/MAX5139 are a family of single-channel

pin-compatible and software-compatible 16-bit and 12-

bit DACs. The MAX5138/MAX5139 are low-power, 16-

bit/12-bit, buffered voltage-output, high-linearity DACs.

They use a precision internal reference or a precision

external reference for rail-to-rail operation. The

MAX5138/MAX5139 accept a wide +2.7V to +5.25V sup-

ply-voltage range to accommodate most low-power and

low-voltage applications. These devices accept a 3-wire

SPI

-/QSPI

-/MICROWIRE

-/DSP-compatible serial

interface to save board space and reduce the complexi-

ty of optically isolated and transformer-isolated applica-

tions. The digital interface’s double-buffered hardware

and software LDAC provide simultaneous output update.

The serial interface features a READY output for easy

daisy-chaining of several MAX5138/MAX5139 devices

and/or other compatible devices. The MAX5138/MAX5139

include a hardware input to reset the DAC outputs to

zero or midscale upon power-up or reset, providing

additional safety for applications that drive valves or

other transducers that need to be off during power-up.

The high linearity of the DACs makes these devices ideal

for precision control and instrumentation applications.

The MAX5138/MAX5139 are available in an ultra-small

(3mm x 3mm), 16-pin TQFN package and are specified

over the -40°C to +105°C extended industrial tempera-

ture range.

Applications

Automatic Test Equipment

Automatic Tuning

Communication Systems

Data Acquisition

Gain and Offset Adjustment

Portable Instrumentation

Power-Amplifier Control

Process Control and Servo Loops

Programmable Voltage and Current Sources

Features

o 16-/12-Bit Resolution in a 3mm x 3mm, 16-Pin

TQFN Package

o Hardware-Selectable on Power-Up or Reset-to-

Zero/Midscale DAC Output

o Double-Buffered Input Registers

o LDAC Asynchronously Updates DAC Output

o READY Facilitates Daisy Chaining

o High-Performance 10ppm/°C Internal Reference

o Guaranteed Monotonic Over All Operating

Conditions

o Wide +2.7V to +5.25V Supply Range

o Rail-to-Rail Buffered Output Operation

o Low Gain Error (Less Than ±0.5% FS) and Offset

(Less Than ±10mV)

o 30MHz 3-Wire SPI-/QSPI-/MICROWIRE-/

DSP-Compatible Serial Interface

o CMOS-Compatible Inputs with Hysteresis

o Low Power Consumption (I

SHDN

= 2µA max)

MAX5138/MAX5139

Low-Power, Single, 16-/12-Bit,

Buffered Voltage-Output DACs

________________________________________________________________

Maxim Integrated Products

LDAC

N.C.

READY

N.C.

OUT

REFI

12 10 9

REFO

AGND

DIN

SCLK

*EP

*EXPOSED PAD

MAX5138

MAX5139

M/Z DVDD

AVDD

TQFN

3mm x 3mm

TOP VIEW

Pin Configuration

19-4428; Rev 1; 4/09

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

EVALUATION KIT

AVAILABLE

Functional Diagram and Typical Operating Circuit appear

at end of data sheet.

SPI and QSPI are trademarks of Motorola Inc.

MICROWIRE is a trademark of National Semiconductor Corp.

Ordering Information

Denotes a lead(Pb)-free/RoHS-compliant package.

EP = Exposed pad.

Note: All devices are specified over the -40°C to +105°C operating

temperature range.

PART PIN-PACKAGE

RESOLUTION

(BITS)

MAX5138BGTE+ 16 TQFN-EP* 16

MAX5139GTE+ 16 TQFN-EP* 12

1 2 3 4 5 6 ... 16 17

Podsumowanie treści

Strona 1 - Buffered Voltage-Output DACs

General DescriptionThe MAX5138/MAX5139 are a family of single-channelpin-compatible and software-compatible 16-bit and 12-bit DACs. The MAX5138/MAX513

Strona 2

MAX5138/MAX5139External ReferenceThe external reference input features a typical inputimpedance of 113kΩ and accepts an input voltagefrom +2V to AVDD.

Strona 3

MAX5138/MAX5139Low-Power, Single, 16-/12-Bit,Buffered Voltage-Output DACs_____________________________________________________________________________

Strona 4

MAX5138/MAX5139Daisy chain multiple MAX5138/MAX5139 devices byconnecting the first device conventionally, then connectits READY output to the CS of th

Strona 5

MAX5138/MAX5139Low-Power, Single, 16-/12-Bit,Buffered Voltage-Output DACs_____________________________________________________________________________

Strona 6

MAX5138/MAX5139Applications InformationPower-On Reset (POR)On power-up, the input register is set to zero, and theDAC output powers up to zero or mids

Strona 7

Offset ErrorOffset error indicates how well the actual transfer func-tion matches the ideal transfer function at a single point.Typically, the point a

Strona 8

MAX5138/MAX5139Low-Power, Single, 16-/12-Bit,Buffered Voltage-Output DACs16 __________________________________________________________________________

Strona 9

MAX5138/MAX5139Low-Power, Single, 16-/12-Bit,Buffered Voltage-Output DACsMaxim cannot assume responsibility for use of any circuitry other than circui

Strona 10

MAX5138/MAX5139Low-Power, Single, 16-/12-Bit,Buffered Voltage-Output DACs2 ___________________________________________________________________________

Strona 11

MAX5138/MAX5139Low-Power, Single, 16-/12-Bit,Buffered Voltage-Output DACs_____________________________________________________________________________

Strona 12

MAX5138/MAX5139Low-Power, Single, 16-/12-Bit,Buffered Voltage-Output DACs4 ___________________________________________________________________________

Strona 13

MAX5138/MAX5139Low-Power, Single, 16-/12-Bit,Buffered Voltage-Output DACs_____________________________________________________________________________

Strona 14

MAX5138/MAX5139Low-Power, Single, 16-/12-Bit,Buffered Voltage-Output DACs6 ___________________________________________________________________________

Strona 15

MAX5138/MAX5139SETTLING TIME DOWNMAX5138 toc19400ns/div500mV/divDIGITAL FEEDTHROUGHMAX5138 toc2040ns/divVOUTSCLK5V/div50mV/divLow-Power, Single, 16-/1

Strona 16

MAX5138/MAX5139Low-Power, Single, 16-/12-Bit,Buffered Voltage-Output DACs8 ___________________________________________________________________________

Strona 17

Detailed DescriptionThe MAX5138/MAX5139 are a family of single-channel,pin-compatible and software-compatible, 16-bit and 12-bit DACs. The parts are l

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