Rainbow-electronics MAX5223 Manual do Utilizador descarregar pdf (Página 1)

General Description

The MAX5223 contains two 8-bit, buffered, voltage out-

put digital-to-analog converters (DAC A and DAC B) in a

small 8-pin SOT23 package. DAC outputs can source

and sink 1mA to within 100mV of ground and V

. The

MAX5223 operates with a single +2.7V to +5.5V supply.

The device uses a 3-wire serial interface, which oper-

ates at clock rates up to 25MHz and is compatible with

SPI™, QSPI™, and MICROWIRE™ interface standards.

The serial input shift register is 16 bits long and con-

sists of 8 bits of DAC input data and 8 bits for DAC

selection and shutdown control. DAC registers can be

loaded independently or in parallel at the positive edge

of CS.

The MAX5223’s ultra-low power consumption and tiny

8-pin SOT23 package make it ideal for portable and

battery-powered applications. Supply current is a low

100µA and drops below 1µA in shutdown mode. In

addition, the reference input is disconnected from the

REF pin during shutdown, which reduces the system’s

total power consumption.

________________________Applications

Digital Gain and Offset Adjustment

Programmable Current Source

Programmable Voltage Source

Power Amp Bias Control

VCO Tuning

Features

♦ Tiny 8-Pin SOT23 Package (3mm

3mm)

♦ Low Power Consumption

100µA Operating Current

<1µA Shutdown Current

♦ +2.7V to +5.5V Single-Supply Operation

♦ Dual Buffered Voltage Output

♦ Programmable Shutdown Mode

♦ 25MHz, 3-Wire Serial Interface

♦ SPI, QSPI, and MICROWIRE-Compatible

MAX5223

Low-Power, Dual, 8-Bit, Voltage Output

Serial DAC in 8-Pin SOT23

________________________________________________________________ Maxim Integrated Products 1

DAC

LATCH

DAC A

DAC

LATCH

DAC B

SCLK

OUTA

OUTB

DIN REF

16-BIT SHIFT REGISTER

CONTROL (8) DATA (8)

MAX5223

0.1µF

(OPTIONAL)

OUTA

OUTB

GND2

0.22µF

Functional Diagram

OUTB

OUTA

SCLK

DIN

REF

GND

MAX5223

TOP VIEW

SOT23-8

Pin Configuration

19-1895; Rev 0; 1/01

PART TEMP. RANGE PIN-PACKAGE

MAX5223EKA-T -40°C to +85°C 8 SOT23

SPI and QSPI are trademarks of Motorola, Inc.

MICROWIRE is a trademark of National Semiconductor Corp.

Ordering Information

For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,

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

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Serial DAC in 8-Pin SOT23 1

Resumo do Conteúdo

Página 1 - Serial DAC in 8-Pin SOT23

General DescriptionThe MAX5223 contains two 8-bit, buffered, voltage out-put digital-to-analog converters (DAC A and DAC B) in asmall 8-pin SOT23 pack

Página 2

Applications InformationThe MAX5223 is specified for single-supply operationwith VDDranging from +2.7V to +5.5V, covering allcommonly used supply volt

Página 3

________________________________________________________Package InformationMaxim cannot assume responsibility for use of any circuitry other than circ

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MAX5223Low-Power, Dual, 8-Bit, Voltage Output Serial DAC in 8-Pin SOT23 2 ____________________________________________________________________________

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MAX5223Low-Power, Dual, 8-Bit, Voltage Output Serial DAC in 8-Pin SOT23 ______________________________________________________________________________

Página 6

0.040.080.060.120.100.160.140.18-40-105-25 2035506580POSITIVE SUPPLY CURRENTvs. TEMPERATUREMAX5223 toc07TEMPERATURE (°C)IDD (mA)00.30.20.10.40.50.60.7

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MAX5223Low-Power, Dual, 8-Bit, Voltage Output Serial DAC in 8-Pin SOT23 ______________________________________________________________________________

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MAX5223Low-Power, Dual, 8-Bit, Voltage Output Serial DAC in 8-Pin SOT23 6 ____________________________________________________________________________

Página 9

MAX5223Low-Power, Dual, 8-Bit, Voltage Output Serial DAC in 8-Pin SOT23 ______________________________________________________________________________

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MAX5223Low-Power, Dual, 8-Bit, Voltage Output Serial DAC in 8-Pin SOT23 8 ____________________________________________________________________________

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MAX5223Low-Power, Dual, 8-Bit, Voltage Output Serial DAC in 8-Pin SOT23 ______________________________________________________________________________

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Rainbow-electronics MAX5223 Manual do Utilizador Página 1

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