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General Description

The MAX5383/MAX5384/MAX5385 low-cost, 8-bit digital-

to-analog converters (DACs) in miniature 6-pin SOT23

packages have a simple 3-wire, SPI™/QSPI™/

MICROWIRE™-compatible serial interface that operates

up to 10MHz. The MAX5383 has an internal +2V refer-

ence and operates from a +2.7V to +3.6V supply. The

MAX5384 has an internal +4V reference and operates

from a +4.5V to +5.5V supply. The MAX5385 operates

over the full +2.7V to +5.5V supply range and has an

internal reference equal to 0.9

The MAX5383/MAX5384/MAX5385 require an extremely

low supply current of only 150µA (typ) and provide a

buffered voltage output. These devices power up at zero

code and remain there until a new code is written to the

DAC registers. This provides additional safety for appli-

cations that drive valves or other transducers that need

to be off on power-up. The MAX5383/MAX5384/

MAX5385 include a 1µA, low-power shutdown mode that

features software-selectable output loads of 1kΩ, 100kΩ,

or 1MΩ to ground.

Applications

Automatic Tuning (VCO)

Power Amplifier Bias Control

Programmable Threshold Levels

Automatic Gain Control

Automatic Offset Adjustment

Features

♦ 8-Bit Resolution in a Miniature 6-Pin SOT23

Package

♦ Wide +2.7V to +5.5V Supply Range (MAX5385)

♦ <1µA Shutdown Mode

♦ Software-Selectable Output Resistance During

Shutdown

♦ Buffered Output Drives Resistive Loads

♦ Low-Glitch Power-On Reset to Zero DAC Output

♦ 3-Wire SPI/QSPI/MICROWIRE-Compatible Interface

♦ < ±5% Full-Scale Error (MAX5385)

♦ < ±1LSB max INL/DNL

♦ Low 230µA (max) Supply Current

MAX5383/MAX5384/MAX5385

Low-Cost, Low-Power, 8-Bit DACs with 3-Wire

Serial Interface in SOT23

________________________________________________________________ Maxim Integrated Products 1

GND

DINV

5 SCLK

OUT

MAX5383

MAX5384

MAX5385

SOT23

TOP VIEW

Pin Configuration

GND

MC68XXXX

PCS0

OUT

SCK

MOSI

SCLK

DIN

MAX5385

+2.7V TO +5.5V

Typical Operating Circuit

19-1718; Rev 2; 1/02

Ordering Information

SPI and QSPI are trademarks of Motorola, Inc.

MICROWIRE is a trademark of National Semiconductor Corp.

PART TEMP RANGE

PIN-

PACKAGE

SOT

TOP MARK

MAX5383EUT-T -40°C to +85°C 6 SOT23 AADF

MAX5383EZT-T -40°C to +85°C 6 SOT23-Thin AAAH

MAX5384EUT-T -40°C to +85°C 6 SOT23 AADH

MAX5384EZT-T -40°C to +85°C 6 SOT23-Thin AAAI

MAX5385EUT-T -40°C to +85°C 6 SOT23 AADJ

MAX5385EZT-T -40°C to +85°C 6 SOT23-Thin AAAJ

Selector Guide

PART INTERNAL REFERENCE

MAX5383 2V

MAX5384 4V

MAX5385 0.9 ✕ V

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.

Summary of content (12 pages)

PAGE 1
9-1718; Rev 2; 1/02 Low-Cost, Low-Power, 8-Bit DACs with 3-Wire Serial Interface in SOT23 Features ♦ 8-Bit Resolution in a Miniature 6-Pin SOT23 Package ♦ Wide +2.7V to +5.
PAGE 2
MAX5383/MAX5384/MAX5385 Low-Cost, Low-Power, 8-Bit DACs with 3-Wire Serial Interface in SOT23 ABSOLUTE MAXIMUM RATINGS VDD to GND ..............................................................-0.3V to +6V OUT ............................................................-0.3V to (VDD + 0.3V) CS, SCLK, DIN to GND ............................................-0.3V to +6V Maximum Current into Any Pin............................................50mA Continuous Power Dissipation (TA = +70°C) 6-Pin SOT23 (derate 8.
PAGE 3
Low-Cost, Low-Power, 8-Bit DACs with 3-Wire Serial Interface in SOT23 (VDD = +2.7V to +3.6V (MAX5383), VDD = +4.5V to +5.5V (MAX5384), VDD = +2.7V to +5.5V (MAX5385), RL = 10kΩ, CL = 50pF, TA = TMIN to TMAX, unless otherwise noted. Typical values are TA = +25°C.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Digital-Analog Glitch Impulse Code 127 to 128 40 nVs Wake-Up Time From software shutdown 50 µs POWER REQUIREMENTS Supply Voltage VDD Supply Current IDD MAX5383 2.7 3.6 MAX5384 4.
PAGE 4
TIMING CHARACTERISTICS (continued) (Figures 3 and 4, VDD = +2.7V to +3.6V (MAX5383), VDD = +4.5V to +5.5V (MAX5384), VDD = +2.7V to +5.5V (MAX5385), RL = 10kΩ, CL = 50pF, TA = TMIN to TMAX, unless otherwise noted. Typical values are TA = +25°C.) (Note 7) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS CS Rise to SCLK Rise Hold tCS1 40 ns CS Pulse Width High tCSW 100 ns Note 1: Note 2: Note 3: Note 4: Note 5: Note 6: Note 7: Guaranteed from code 5 to code 255.
PAGE 5
Low-Cost, Low-Power, 8-Bit DACs with 3-Wire Serial Interface in SOT23 TOTAL UNADJUSTED ERROR vs. CODE MAX5383/4/5-09 0 MAX5383/4/5-08 0.10 OFFSET ERROR vs. TEMPERATURE OFFSET ERROR vs. SUPPLY VOLTAGE 0 MAX5383/4/5-07 0.15 -0.05 VOS (mV) VOS (mV) 0 -0.25 -0.25 -0.10 -0.15 -0.50 -0.50 200 300 2.5 3.0 CODE 3.5 4.0 4.5 FULL-SCALE ERROR vs. SUPPLY VOLTAGE -20 0 0.50 MAX5383 0.25 0.75 0.8 0.50 0.4 MAX5385 0 0 -0.25 -0.4 -0.50 -0.75 3.0 3.5 4.0 4.5 5.
PAGE 6
Typical Operating Characteristics (continued) (VDD = +3.0V (MAX5383), VDD = +5.0V (MAX5384/MAX5385), TA = +25°C, unless otherwise noted.) 145 140 MAX5383 VDD = +5V 135 MAX5383 VDD = +3V 0.6 0.4 32 64 96 128 160 192 224 256 2.5 CODE OUTPUT LOAD REGULATION MAX5383/4/5-17 3.0 3.5 4.0 4.5 5.0 VDD = +3V -40 5.5 -20 0 40 60 TEMPERATURE (°C) OUTPUT VOLTAGE ON POWER-UP MAX5383 OUTPUT VOLTAGE EXITING SHUTDOWN OUT 50mV/div 3.0 80 100 MAX5383/4/5-19 3.5 OUT 500mV/div 2.5 C 0.
PAGE 7
Low-Cost, Low-Power, 8-Bit DACs with 3-Wire Serial Interface in SOT23 MAX5383 OUTPUT SETTLING 1LSB STEP UP MAX5383/4/5-23 MAX5383/4/5-22 MAX5383 OUTPUT SETTLING 1LSB STEP DOWN OUT 20mV/div AC-COUPLED OUT 20mV/div AC-COUPLED CS 3V/div CS 3V/div 2µs/div 2µs/div 0 x 7F TO 0 x 80 0 x 80 TO 0 x 7F Pin Description PIN NAME DESCRIPTION 1 OUT DAC Voltage Output 2 GND Ground 3 VDD Power-Supply Input 4 DIN Serial Data Input 5 SCLK Serial Clock Input 6 CS Chip-Select Input Detailed Des
PAGE 8
MAX5383/MAX5384/MAX5385 Low-Cost, Low-Power, 8-Bit DACs with 3-Wire Serial Interface in SOT23 VDD OUT CURRENT-STEERING DAC REF 255 MAX5383 MAX5384 MAX5385 DATA LATCH CS CONTROL LOGIC DIN 8 SCLK SERIAL INPUT REGISTER GND Figure 1. Functional Diagram combination of resistive loads >10kΩ and capacitive loads <50pF. Power-On Reset The MAX5383/MAX5384/MAX5385 have a power-on reset circuit to set the DAC’s output to 0 when VDD is first applied or when VDD dips below 1.7V (typ).
PAGE 9
Low-Cost, Low-Power, 8-Bit DACs with 3-Wire Serial Interface in SOT23 Applications Information Device Powered by an External Reference Since the MAX5385 generates an output voltage proportional to VDD, a noisy power supply will affect the accuracy of the on-board reference, thereby affecting the overall accuracy of the DAC. The circuit in Figure 5 rejects this power-supply noise by powering the device directly with a precision voltage reference, improving overall system accuracy.
PAGE 10
MAX5383/MAX5384/MAX5385 Low-Cost, Low-Power, 8-Bit DACs with 3-Wire Serial Interface in SOT23 ;;;;;;;; ;;;;;;;;; ; ; ;; tCSH CS tCSO tCSS tCH SCLK tCS1 tCL tDH tDS D15 DIN D14 D0 Figure 3. 3-Wire Serial Interface Timing Diagram CS DAC UPDATED SCLK DIN D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Figure 4. Complete 3-Wire Serial Interface Transmission Chip Information +3.2V TO +12V TRANSISTOR COUNT: 2160 IN MAX6103 OUT +3.00V 0.
PAGE 11
Low-Cost, Low-Power, 8-Bit DACs with 3-Wire Serial Interface in SOT23 ______________________________________________________________________________________ 11 MAX5383/MAX5384/MAX5385 Package Information
PAGE 12
Low-Cost, Low-Power, 8-Bit DACs with 3-Wire Serial Interface in SOT23 MAX5383/MAX5384/MAX5385 Package Information (continued) Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.