Rainbow Electronics MAX5385 User Manual

General Description

The MAX5383/MAX5384/MAX5385 low-cost, 8-bit digital­to-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 refer­ence 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 ✕VDD.

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 appli­cations 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

Pin Configuration

GND

MC68XXXX

PCS0

V

DD

OUT

SCK

MOSI

SCLK

DIN

MAX5385

+2.7V TO +5.5V

CS

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.

Selector Guide

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.

PART TEMP RANGE

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

PIN­PACKAGE

SOT

TOP MARK

PART INTERNAL REFERENCE

MAX5383 2V

MAX5384 4V

MAX5385 0.9 ✕ V

TOP VIEW

16

OUT

2

GND

34

DD

DD

CS

MAX5383
MAX5384
MAX5385

SOT23

5 SCLK

DINV

MAX5383/MAX5384/MAX5385

Low-Cost, Low-Power, 8-Bit DACs with 3-Wire
Serial Interface in SOT23

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(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,
T

A

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are TA= +25°C.)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.

VDDto GND..............................................................-0.3V to +6V

OUT ............................................................-0.3V to (V

DD

+ 0.3V)

CS, SCLK, DIN to GND ............................................-0.3V to +6V

Maximum Current into Any Pin............................................50mA

Continuous Power Dissipation (T

A

= +70°C)

6-Pin SOT23 (derate 8.7mW/°C above +70°C)..........696mW

Operating Temperature Range ...........................-40°C to +85°C

Storage Temperature Range .............................-65°C to +150°C

Maximum Junction Temperature .....................................+150°C

Lead Temperature (soldering, 10s) .................................+300°C

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

STATIC ACCURACY

Resolution 8 Bits

Integral Linearity Error INL (Note 1) ±1 LSB

Differential Linearity Error DNL Guaranteed monotonic ±1 LSB

Offset Error V

Offset Error Supply Rejection MAX5385 (Notes 2, 3) 60 dB

Offset Error Temperature
Coefficient

Full-Scale Error C ode = 255, no l oad

Full-Scale Error Supply
Rejection

Full-Scale Error Temperature
Coefficient

DAC OUTPUT

Internal Reference Voltage
(Note 5)

Output Load Regulation

Shutdown Output Resistance
to GND

DYNAMIC PERFORMANCE

Voltage Output Slew Rate Positive and negative 0.4 V/µs

Output Settling Time To 1/2 LSB, 50kΩ and 50pF load (Note 6) 20 µs

Digital Feedthrough Code = 0, all digital inputs from 0 to V

OS

REF

(Note 2) ±1 ±25 mV

MAX5383/MAX5384 3

MAX5385 1

C od e = 255 ( N ote 4) M AX 5383/M AX 5384 50 dB

Code = 255

MAX5383 1.8 2 2.2

MAX5384 3.6 4 4.4

MAX5385

Code = 255, 0µA to 100µA0.5

Code = 0, 0µA to 100µA0.5

= 0 to V

V

OUT

M AX 5383/M AX 5384 10

MAX5385 5

M AX 5383/M AX 5384 ±40

MAX5385 ±10

DD

0.85 ×
V

[D13, D12] = 0, 1 1k

[D13, D12] = 1, 0 100k

[D13, D12] = 1, 1 1M

DD

DD

0.9 ×
V

0.95 ×
V

DD

2 nVs

DD

ppm/ °C

% of

i d eal FS

ppm/ °C

V

LSB

Ω

MAX5383/MAX5384/MAX5385

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

Serial Interface in SOT23

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(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,
T

A

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are TA= +25°C.)

TIMING CHARACTERISTICS

(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),
R

L

= 10kΩ, CL= 50pF, TA = T

MIN

to T

MAX

, unless otherwise noted. Typical values are TA= +25°C.) (Note 7)

Digital-Analog Glitch Impulse Code 127 to 128 40 nVs

Wake-Up Time From software shutdown 50 µs

POWER REQUIREMENTS

Supply Current I

DIGITAL INPUTS

Input Low Voltage V

Input High Voltage V

Input Hysteresis V

Input Capacitance C

Input Leakage Current I

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

MAX5383 2.7 3.6

DD

DD

IN

MAX5384 4.5 5.5Supply Voltage V

MAX5385 2.7 5.5

No load, all digital inputs at 0 or VDD,
code = 255

Shutdown mode 1

IL

IH

H

(Note 7) 10 pF

IN

0.7 ×
V

DD

150 230

0.05 ×
V

DD

0.3 ×
V

DD

±1 µA

V

µA

V

V

V

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

SCLK Period t

SCLK Pulse Width High t

SCLK Pulse Width Low t

CS Fall to SCLK Rise Setup
Time

SCLK Rise to CS Rise Hold
Time

DIN Setup Time t

DIN Hold Time t
SCLK Rise to CS Fall Delay t

CP

CH

CL

t

CSS

t

CSH

DS

DH

CS0

100 ns

40 ns

40 ns

40 ns

0ns

40 ns

0ns

10 ns

MAX5383/MAX5384/MAX5385

Low-Cost, Low-Power, 8-Bit DACs with 3-Wire
Serial Interface in SOT23

4 _______________________________________________________________________________________

Typical Operating Characteristics

(VDD= +3.0V (MAX5383), V

DD

= +5.0V (MAX5384/MAX5385), TA= +25°C, unless otherwise noted.)

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),
R

L

= 10kΩ, CL= 50pF, TA = T

MIN

to T

MAX

, unless otherwise noted. Typical values are TA= +25°C.) (Note 7)

Note 1: Guaranteed from code 5 to code 255.
Note 2: The offset value extrapolated from the range over which the INL is guaranteed.
Note 3: MAX5385 tested at 5V ±10%.
Note 4: MAX5383 tested at 3V ±10%; MAX5384 tested at 5V ±10%.
Note 5: Actual output voltages at full-scale are 255/256

✕

V

REF

.

Note 6: Output settling time is measured by stepping from code 5 to code 255, and from code 255 to code 5.
Note 7: Guaranteed by design.

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

CS Rise to SCLK Rise Hold t
CS Pulse Width High t

INTEGRAL NONLINEARITY vs. CODE

0.075

0.050

0.025

0

-0.025

INL (LSB)

-0.050

-0.075

CS1

CSW

MAX5383/4/5-01

0

-0.05

-0.10

INL (LSB)

-0.15

INTEGRAL NONLINEARITY

vs. SUPPLY VOLTAGE

MAX5383/4/5-02

40 ns

100 ns

INTEGRAL NONLINEARITY

vs. TEMPERATURE

0

-0.025

INL (LSB)

MAX5383/4/5-03

-0.100

0 100 200 300

50

150

CODE

DIFFERENTIAL NONLINEARITY vs. CODE

0.010

0.005

0

-0.005

DNL (LSB)

-0.010

-0.015

-0.020
0 100 200 300

CODE

250

MAX5383/4/5-04

DNL (LSB)

-0.20

2.5 4.03.0 3.5 4.5 5.0 5.5
SUPPLY VOLTAGE (V)

DIFFERENTIAL NONLINEARITY

vs. SUPPLY VOLTAGE

0

-0.005

-0.010

-0.015

-0.020

-0.025

2.5 4.03.0 3.5 4.5 5.0 5.5
SUPPLY VOLTAGE (V)

MAX5383/4/5-05

-0.050

-40 20-20 0 40 60 80 100
TEMPERATURE (°C)

DIFFERENTIAL NONLINEARITY

vs. TEMPERATURE

0

-0.005

-0.010

DNL (LSB)

-0.015

-0.020

-0.025

-40 20-20 0 40 60 80 100

TEMPERATURE (°C)

MAX5383/4/5-06