MAX5223EKA+T【PDF 1/11 页】IC DAC 8BIT DUAL LP SER SOT23-8

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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 VDD. 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

100A and drops below 1A 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

o Tiny 8-Pin SOT23 Package (3mm 3mm)

o Low Power Consumption

100A Operating Current

<1A Shutdown Current

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

o Dual Buffered Voltage Output

o Programmable Shutdown Mode

o 25MHz, 3-Wire Serial Interface

o SPI, QSPI, and MICROWIRE-Compatible

MAX5223

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

Serial DAC in 8-Pin SOT23

________________________________________________________________ Maxim Integrated Products

DAC

LATCH

DAC A

DAC

LATCH

DAC B

SCLK

OUTA

OUTB

DIN

REF

VDD

16-BIT

SHIFT

CONTROL

(8)

DATA

(8)

MAX5223

0.1

(OPTIONAL)

VOUTA

VOUTB

GND

0.22

Functional Diagram

OUTB

VDD

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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