Rainbow Electronics MAX5444 User Manual

General Description

The MAX5441–MAX5444 are serial-input, voltage-output, 16-bit digital-to-analog converters (DACs) in tiny µMAX packages, 50% smaller than comparable DACs in 8-pin SOs. They operate from low +3V (MAX5443/ MAX5444) or +5V (MAX5441/MAX5442) single supplies. They provide 16-bit performance (±2LSB INL and ±1LSB DNL) over temperature without any adjustments. Unbuffered DAC outputs result in a low supply current of 120µA and a low offset error of 2LSB.

The DAC output ranges from 0 to V

REF

. For bipolar operation, matched scaling resistors are provided in the MAX5442/MAX5444 for use with an external precision op amp (such as the MAX400), generating a ±V

REF

output swing.

A 16-bit serial word is used to load data into the DAC latch. The 25MHz, 3-wire serial interface is compatible with SPI™/QSPI™/MICROWIRE™, and can interface directly with optocouplers for applications requiring isolation. A power-on reset circuit clears the DAC output to code 0 (MAX5441/MAX5443) or code 32768 (MAX5442 /MAX5444) when power is initially applied.

A logic low on CLR asynchronously clears the DAC output to code 0 (MAX5441/MAX5443) or code 32768 (MAX5442/MAX5444) independent of the serial interface.

The MAX5441/MAX5443 are available in 8-pin µMAX packages. The MAX5442/MAX5444 are available in 10pin µMAX packages.

Applications

High-Resolution Offset and Gain Adjustment

Industrial Process Control

Automated Test Equipment

Data-Acquisition Systems

Features

♦ Ultra-Small 3mm x 5mm 8-Pin µMAX Package

♦ Low 120µA Supply Current

♦ Fast 1µs Settling Time

♦ 25MHz SPI/QSPI/MICROWIRE-Compatible Serial

Interface

♦ V

REF

Range Extends to V

♦ +5V (MAX5441/MAX5442) or +3V

(MAX5443/MAX5444) Single-Supply Operation

♦ Full 16-Bit Performance Without Adjustments

♦ Unbuffered Voltage Output Directly Drives

60kΩ Loads

♦ Power-On Reset Circuit Clears DAC Output to

Code 0 (MAX5441/MAX5443) or Code 32768 (MAX5442/MAX5444)

♦ Schmitt-Trigger Inputs for Direct Optocoupler

Interface

♦ Asynchronous CLR

MAX5441–MAX5444

+3V/+5V, Serial-Input,

Voltage-Output, 16-Bit DACs

________________________________________________________________ Maxim Integrated Products 1

Pin Configurations

19-1846; Rev 1; 6/01

Ordering Information

SPI and QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp.

Functional Diagrams appear at end of data sheet.

Ordering Information continued at end of data sheet.

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

REF

SCLK

DIN

CLR

MAX5442

MAX5444

µMAX-10

GND

OUT

CLR

REF

SCLK

DIN

TOP VIEW

MAX5441 MAX5443

µMAX-8

GND

RFB

INV

OUT

PART TEMP RANGE PIN-PACKAGE INL (LSB) SUPPLY (V)

MAX5441ACUA 0°C to +70°C 8 µMAX ±2 5

MAX5441AEUA -40°C to +85°C 8 µMAX ±25 MAX5441BCUA 0°C to +70°C 8 µMAX ±45 MAX5441BEUA -40°C to +85°C 8 µMAX ±4 5 MAX5442ACUB 0°C to +70°C 10 µMAX ±25 MAX5442AEUB -40°C to +85°C 10 µMAX ±2 5 MAX5442BCUB 0°C to +70°C 10 µMAX ±45 MAX5442BEUB -40°C to +85°C 10 µMAX ±4 5

MAX5441–MAX5444

+3V/+5V, Serial-Input, Voltage-Output, 16-Bit DACs

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VDD= +3V (MAX5443/MAX5444) or +5V (MAX5441/MAX5442), V

REF

= +2.5V, CL= 10pF, GND = 0, RL= ∞, TA= T

MIN

to T

MAX

unless otherwise noted. Typical values are at T

= +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

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

REF to GND................................................-0.3V to (V

+ 0.3V)

OUT, INV to GND .....................................................-0.3V to V

RFB to INV ...................................................................-6V to +6V

RFB to GND.................................................................-6V to +6V

Maximum Current Into Any Pin ...........................................50mA

Continuous Power Dissipation (T

= +70°C)

8-Pin µMAX (derate 4.5mW/°C above +70°C)...............362mW

10-Pin µMAX (derate 5.6mW/°C above +70°C) ..............444mW

Operating Temperature Ranges

MAX544 _ _CU_ ...................................................0°C to +70°C

MAX544 _ _EU_.................................................-40°C to +85°C

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

Maximum Die Temperature..............................................+150°C

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

Bipolar mode

Unipolar mode

(Note 3)

(Note 2)

CONDITIONS

kΩ

REF

Reference Input Resistance (Note 4)

V2.0 V

REF

Reference Input Range

Power-Supply Rejection

ppm/°C±0.5BZS

Bipolar Zero Tempco

LSB

±0.015

Bipolar Resistor Matching

OUT

DAC Output Resistance kΩ6.2

Bits16NResolution

ppm/°C±0.1Gain-Error Tempco

LSBGain Error (Note 1)

ppm/°C±0.05ZS

Zero-Code Tempco

Integral Nonlinearity

UNITSMIN TYP MAXSYMBOLPARAMETER

MAX544_A

LSB

Bipolar Zero Offset Error

(Note 5) 15 V/µsSRVoltage-Output Slew Rate

DYNAMIC PERFORMANCE—ANALOG SECTION

To ±1/2LSB of FS

1 µsOutput Settling Time

Guaranteed monotonic LSB±0.5 ±1DNLDifferential Nonlinearity

INL

RFB/R

INV

Ratio error

±20

LSB

±1+2.7V ≤ VDD≤ +3.3V (MAX5443/MAX5444)

PSR

+4.5V ≤ VDD≤ +5.5V (MAX5441/MAX5442) ±1

Major-carry transition 7 nV-sDAC Glitch Impulse

Code = 0000 hex; CS = V

;

SCLK, DIN = 0 to VDDlevels

0.2 nV-sDigital Feedthrough

±0.5 ±2

±10

ZSE LSB±2Zero-Code Offset Error

±0.5 ±4MAX544_B

STATIC PERFORMANCE—ANALOG SECTION

REFERENCE INPUT

MAX5441–MAX5444

+3V/+5V, Serial-Input,

Voltage-Output, 16-Bit DACs

_______________________________________________________________________________________ 3

TIMING CHARACTERISTICS

(VDD= +2.7V to +3.3V (MA5443/MAX5444) , VDD= +4.5V to +5.5V (MAX5441/MAX5442), V

REF

= +2.5V, GND = 0, CMOS inputs,

= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at TA= +25°C.) (Figure 1)

Note 1: Gain error tested at V

REF

= +2.0V, +2.5V, and +3.0V (MAX5443/MAX5444) or V

REF

= +2.0V, +2.5V, +3.0V, and +5.5V

(MAX5441/ MAX5442).

Note 2: R

OUT

tolerance is typically ±20%.

Note 3: Min/max range guaranteed by gain-error test. Operation outside min/max limits will result in degraded performance. Note 4: Reference input resistance is code-dependent, minimum at 8555hex in unipolar mode, 4555hex in bipolar mode. Note 5: Slew-rate value is measured from 10% to 90%. Note 6: Guaranteed by design. Not production tested. Note 7: Guaranteed by power-supply rejection test and Timing Characteristics.

All digital inputs at VDDor GND

MAX5443/MAX5444

Code = 0000 hex, V

REF

= 1V

P-P

at 100kHz

Code = 0000 hex

Code = FFFF hex

(Note 6)

CONDITIONS

0.36

PDPower Dissipation

mA0.12 0.20I

Positive Supply Current

2.7 3.6

Positive Supply Range (Note 7)

V0.15V

Hysteresis Voltage

pF310C

Input Capacitance

P-P

µA±1I

Input Current

V0.8V

Input Low Voltage

V2.4V

Input High Voltage

Reference Feedthrough

dB92SNRSignal-to-Noise Ratio

170

INREF

Reference Input Capacitance

UNITSMIN TYP MAXSYMBOLPARAMETER

(Note 6)

CONDITIONS

µs20

VDDHigh to CS Low (power-up delay)

ns20t

SCLK Pulse Width Low

ns20t

MHz25f

CLK

SCLK Frequency

SCLK Pulse Width High

ns20t

CLW

CLR Pulse Width Low

ns0t

DIN to SCLK High Hold

ns15t

DIN to SCLK High Setup

ns15t

CSS0

CS Low to SCLK High Setup

ns15t

CSS1

CS High to SCLK High Setup

ns35t

CSH0

SCLK High to CS Low Hold

ns20t

CSH1

SCLK High to CS High Hold

UNITSMIN TYP MAXSYMBOLPARAMETER

Code = FFFF hex MHz1BWReference -3dB Bandwidth

MAX5441/MAX5442 4.5 5.5

0.60

DYNAMIC PERFORMANCE—REFERENCE SECTION

STATIC PERFORMANCE—DIGITAL INPUTS

POWER SUPPLY

MAX5441/MAX5442

MAX5443/MAX5444

ELECTRICAL CHARACTERISTICS (continued)

(VDD= +3V (MAX5443/MAX5444) or +5V (MAX5441/MAX5442), V

REF

= +2.5V, CL= 10pF, GND = 0, RL= ∞, TA= T

MIN

to T

MAX

unless otherwise noted. Typical values are at T

= +25°C.)

MAX5441–MAX5444

+3V/+5V, Serial-Input, Voltage-Output, 16-Bit DACs

4 _______________________________________________________________________________________

__________________________________________Typical Operating Characteristics

(VDD= +3V (MAX5443/MAX5444) or +5V (MAX5441/MAX5442), V

REF

= +2.5V, GND = 0, RL= ∞, TA= T

MIN

to T

MAX

, unless other-

wise noted. Typical values are at T

= +25°C.)

0.050

0.025

0.100

0.075

0.125

0.150

-40 10-15 35 60 85

SUPPLY CURRENT vs. TEMPERATURE

MAX5441/44 toc01

TEMPERATURE (°C)

SUUPLY CURRENT (mA)

VDD = +5V

VDD = +3V

0.05

0.09

0.08

0.06

0.10

0.11

0.12

0 2.01.50.5 1.0 2.5 3.0 3.5 4.0 4.5 5.0

SUPPLY CURRENT

vs. REFERENCE VOLTAGE

MAX5441/44 toc02

REFERENCE VOLTAGE (V)

SUPPLY CURRENT (mA)

0.07

VDD = +5V

0.05

0.07

0.06

0.09

0.08

0.11

0.10

0.12

0 1.0 1.50.5 2.0 2.5 3.0

SUPPLY CURRENT

vs. REFERENCE VOLTAGE

MAX5441/44 toc03

REFERENCE VOLTAGE (V)

SUPPLY CURRENT (mA)

VDD = +3V

-0.2

-0.1

0.2

0.1

0.3

0.4

-40 10-15 35 60 85

ZERO-CODE OFFSET ERROR

vs. TEMPERATURE

MAX5441/44 toc04

TEMPERATURE (°C)

OFFSET ERROR (LSB)

-0.4

-0.2

0.4

0.2

0.6

0.8

-40 10-15 35 60 85

INTEGRAL NONLINEARITY

vs. TEMPERATURE

MAX5441/44 toc05

TEMPERATURE (°C)

INL (LSB)

+INL

-INL

-0.4

-0.2

-0.3

-0.1

0.1

0.2

-40 10-15 35 60 85

DIFFERENTIAL NONLINEARITY

vs. TEMPERATURE

MAX5441/44 toc06

TEMPERATURE (°C)

DNL (LSB)

+DNL

-DNL

-0.30

-0.20

-0.25

-0.10

-0.15

-0.05

-40 10-15 35 60 85

GAIN ERROR

vs. TEMPERATURE

MAX5441/44 toc07

TEMPERATURE (°C)

GAIN ERROR (LSB)

0.25

0.20

0.15

0.10

0.05

-0.05

-0.10

-0.15

-0.20

-0.25 0015k5k 25k

35k

45k 55k 66k

INTEGRAL NONLINEARITY vs. CODE

MAX5441/44 toc08

CODE

INL (LSB)

0.125

0.100

0.075

0.050

0.025

-0.025

-0.050

-0.075

-0.100

-0.125 0015k5k 25k

35k

45k 55k 66k

DIFFERENTIAL NONLINEARITY

MAX5441/44 toc09

CODE

DNL (LSB)

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