Rainbow Electronics MAX542 User Manual

General Description

The MAX541/MAX542 are serial-input, voltage-output,
16-bit digital-to-analog converters (DACs) that operate
from a single +5V supply. They provide 16-bit perfor­mance (±1LSB INL and DNL) over temperature without
any adjustments. The DAC output is unbuffered, result­ing in a low supply current of 0.3mA and a low offset
error of 1LSB.

The DAC output range is 0V to V

REF

. For bipolar opera­tion, matched scaling resistors are provided in the
MAX542 for use with an external precision op amp
(such as the MAX400), generating a ±V

REF

output
swing. The MAX542 also includes Kelvin-sense con­nections for the reference and analog ground pins to
reduce layout sensitivity.

A 16-bit serial word is used to load data into the DAC
latch. The 10MHz, 3-wire serial interface is compatible
with SPI™/QSPI™/MICROWIRE™, and it also interfaces
directly with optocouplers for applications requiring isola­tion. A power-on reset circuit clears the DAC output to 0V
(unipolar mode) when power is initially applied.

The MAX541 is available in 8-pin plastic DIP and SO
packages. The MAX542 is available in 14-pin plastic
DIP and SO packages.

Applications

High-Resolution Offset and Gain Adjustment

Industrial Process Control

Automated Test Equipment

Data-Acquisition Systems

Features

♦ Full 16-Bit Performance Without Adjustments

♦ +5V Single-Supply Operation

♦ Low Power: 1.5mW

♦ 1µs Settling Time
♦ Unbuffered Voltage Output Directly Drives 60kΩ

Loads

♦ SPI/QSPI/MICROWIRE-Compatible Serial Interface

♦ Power-On Reset Circuit Clears DAC Output to 0V

(unipolar mode)

♦ Schmitt Trigger Inputs for Direct Optocoupler

Interface

MAX541/MAX542

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

________________________________________________________________ Maxim Integrated Products 1

General Description

16-BIT DAC

16-BIT DATA LATCH

SERIAL INPUT REGISTER

CONTROL

LOGIC

MAX542

REFF

REFS

CS

LDAC

DIN

SCLK

AGNDS

AGNDF

OUT

INV

RFB

V

DD

DGND

R

FB

R

INV

Functional Diagrams

19-1082; Rev 2; 12/99

PART

MAX541ACPA

MAX541BCPA

MAX541ACSA 0°C to +70°C

0°C to +70°C

0°C to +70°C

TEMP. RANGE PIN-PACKAGE

8 Plastic DIP

8 Plastic DIP

8 SO

Ordering Information

For free samples & the latest literature: http://www.maxim-ic.com, or phone [phone].
For small orders, phone [phone].

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

MAX541BCSA 0°C to +70°C 8 SO

INL

(LSB)

±1

±2

±1

±2

Ordering Information continued at end of data sheet.

MAX541CCPA 0°C to +70°C 8 Plastic DIP ±4

MAX541CCSA 0°C to +70°C 8 SO ±4

Functional Diagrams continued at end of data sheet.

TOP VIEW

RFB

1

OUT

2

1

OUT

2

AGND

3

REF

4

CS

MAX541

DIP/SO

8

7

6

5

V

DD

DGND

DIN

SCLK

AGNDF

AGNDS

REFS

REFF

CS

3

4

5

6

7

MAX542

DIP/SO

V

14

DD

13

INV

DGND

12

11

LDAC

DIN

10

N.C.

9

8

SCLK

MAX541/MAX542

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

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VDD= +5V ±5%, V

REF

= +2.5V, AGND = DGND = 0, TA= T

MIN

to T

MAX

, unless otherwise noted.)

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 DGND ...........................................................-0.3V to +6V

CS, SCLK, DIN, LDAC to DGND ..............................-0.3V to +6V

REF, REFF, REFS to AGND ........................-0.3V to (V

DD

+ 0.3V)

AGND, AGNDF, AGNDS to DGND........................-0.3V to +0.3V

OUT, INV to AGND, DGND ......................................-0.3V to V

DD

RFB to AGND, DGND..................................................-6V to +6V

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

Continuous Power Dissipation (T

A

= +70°C)

8-Pin Plastic DIP (derate 9.09mW/°C above +70°C) .....727mW

8-Pin SO (derate 5.88mW/°C above +70°C) .................471mW

14-Pin Plastic DIP (derate 10.00mW/°C above +70°C) ...800mW

14-Pin SO (derate 8.33mW/°C above +70°C) ...............667mW

14-Pin Ceramic SB (derate 10.00mW/°C above +70°C ..800mW

Operating Temperature Ranges

MAX541 _C_ A/MAX542_C_D. .............................0°C to +70°C

MAX541 _E_ A/MAX542_E_D............................-40°C to +85°C

MAX542CMJD .................................................-55°C to +125°C

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

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

MAX542, bipolar mode

Unipolar mode

(Note 3)

4.75V ≤ VDD≤ 5.25V

MAX542

TA= T

MIN

to T

MAX

TA= +25°C

Ratio error

TA= +25°C

TA= T

MIN

to T

MAX

VDD= 5V

TA= +25°C

RFB/R

INV

TA= T

MIN

to T

MAX

(Note 2)

CONDITIONS

kΩ

9.0

R

REF

Reference Input Resistance
(Note 4)

11.5

V2.0 3.0V

REF

Reference Input Range

PSRPower-Supply Rejection LSB±1.0

ppm/°C±0.5BZS

TC

Bipolar Zero Tempco

LSB

±10

±0.015

Bipolar Resistor Matching

1.0

R

OUT

DAC Output Resistance kΩ6.25

±0.5 ±1.0

Bits16NResolution

ppm/°C±0.1Gain-Error Tempco

LSB

±10

Gain Error (Note 1)

±5

ppm/°C±0.05ZS

TC

Zero-Code Tempco

LSB

±0.5 ±2.0

INLIntegral Nonlinearity

±0.5 ±4.0

±1

±2

Zero-Code Offset Error

UNITSMIN TYP MAXSYMBOLPARAMETER

ZSE LSB

MAX54_A

MAX54_B

TA= T

MIN

to T

MAX

±20

Bipolar Zero Offset Error

CL= 10pF (Note 5) 25 V/µsSRVoltage-Output Slew Rate

DYNAMIC PERFORMANCE—ANALOG SECTION (RL= ∞, unipolar mode)

to ±1/2LSB of FS, CL= 10pF

1 µsOutput Settling Time

Guaranteed monotonic LSB±0.5 ±1.0DNLDifferential Nonlinearity

MAX54_C

STATIC PERFORMANCE—ANALOG SECTION (RL= ∞)

REFERENCE INPUT

MAX542

MAX542

%

MAX541/MAX542

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

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(VDD= +5V ±5%, V

REF

= +2.5V, AGND = DGND = 0, TA= T

MIN

to T

MAX

, unless otherwise noted.)

TIMING CHARACTERISTICS

(VDD= +5V ±5%, V

REF

= +2.5V, AGND = DGND = 0, CMOS inputs, TA= T

MIN

to T

MAX

, unless otherwise noted.)

Note 1: Gain Error tested at V

REF

= 2.0V, 2.5V, and 3.0V.

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 8555 hex.
Note 5: Slew-rate value is measured from 0% to 63%.
Note 6: Guaranteed by design. Not production tested.

Code = 0000 hex; CS = V

DD

;

LDAC = 0;

SCLK, DIN = 0 to V

DD

levels

Major-carry transition

VIN= 0

Code = 0000 hex, V

REF

= 1Vp-p at 100kHz

Code = 0000 hex

Code = FFFF hex

(Note 6)

CONDITIONS

mW1.5PDPower Dissipation

mA0.3 1.1I

DD

Positive Supply Current

V4.75 5.25V

DD

Positive Supply Range

V0.40V

H

Hysteresis Voltage

pF10C

IN

Input Capacitance

mVp-p1

nVs10

nVs10DAC Glitch Impulse

Digital Feedthrough

µA±1I

IN

Input Current

V0.8V

IL

Input Low Voltage

V2.4V

IH

Input High Voltage

Reference Feedthrough

dB92SNRSignal-to-Noise Ratio

75

pF

120

C

IN

Reference Input Capacitance

UNITSMIN TYP MAXSYMBOLPARAMETER

MAX542 (Note 6)

MAX542

(Note 6)

CONDITIONS

µs20

VDDHigh to CS Low
(power-up delay)

ns45t

CL

SCLK Pulse Width Low

ns45t

CH

MHz10f

CLK

SCLK Frequency

SCLK Pulse Width High

ns50t

LDACS

CS High to LDAC Low Setup

ns50t

LDAC

LDAC Pulse Width

ns0t

DH

DIN to SCLK High Hold

ns40t

DS

DIN to SCLK High Setup

ns45t

CSS0

CS Low to SCLK High Setup

ns45t

CSS1

CS High to SCLK High Setup

ns30t

CSH0

SCLK High to CS Low Hold

ns45t

CSH1

SCLK High to CS High Hold

UNITSMIN TYP MAXSYMBOLPARAMETER

Code = FFFF hex MHz1BWReference -3dB Bandwidth

DYNAMIC PERFORMANCE—REFERENCE SECTION

STATIC PERFORMANCE—DIGITAL INPUTS

POWER SUPPLY

MAX541/MAX542

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

4 _______________________________________________________________________________________

__________________________________________Typical Operating Characteristics

(VDD= 5V, V

REF

= +2.5V, TA = +25°C, unless otherwise noted.)

0.50

0.45

0.40

0.35

0.30

0.25

0.20

-40 -20 0 20 40 60 80 100

MAX542-01

SUPPLY CURRENT (mA)

SUPPLY CURRENT
vs. TEMPERATURE

TEMPERATURE (°C)

0.35

0.34

0.33

0.32

0.31

0.30

0.29

0.28
0123456

MAX542-02

SUPPLY CURRENT (mA)

SUPPLY CURRENT

vs. REFERENCE VOLTAGE

REFERENCE VOLTAGE (V)

1.0

0.6

0.2

0

-0.2

-0.6

0.8

0.4

-0.4

-0.8

-1.0

-60

-20 20 60 100 140

MAX542-03

ZERO-CODE OFFSET ERROR (LSB)

ZERO-CODE OFFSET ERROR

vs. TEMPERATURE

TEMPERATURE (°C)

1.0

0.6

0.2

0

-0.2

-0.6

0.8

0.4

-0.4

-0.8

-1.0

-60

-20 20 60 100 140

MAX542-04

INL (LSB)

INTEGRAL NONLINEARITY

vs. TEMPERATURE

TEMPERATURE (°C)

+INL

-INL

1.00

0.50

0.25

0.75

0

-0.25

-0.50

-0.75

-1.00
0

10k 20k 30k 40k 50k 60k 70k

MAX542-07

INL (LSB)

INTEGRAL NONLINEARITY

vs. CODE

DAC CODE

1.0

0.6

0.2

0

-0.2

-0.6

0.8

0.4

-0.4

-0.8

-1.0

-60

-20 20 60 100 140

MAX542-05

DNL (LSB)

DIFFERENTIAL NONLINEARITY

vs. TEMPERATURE

TEMPERATURE (°C)

+DNL

-DNL

1.0

0.8

0.6

0.4

0.2

0

-0.2

-0.4

-0.6

-0.8

-1.0

-60

-20 20 60 100 140

MAX542-06

GAIN ERROR (LSB)

GAIN ERROR

vs. TEMPERATURE

TEMPERATURE (°C)

0.25

0.75

0.50

1.00

0

-0.25

-0.50

-0.75

-1.00
0

10k 20k 30k 40k 50k 60k 70k

MAX542-08

DNL (LSB)

DIFFERENTIAL NONLINEARITY

vs. CODE

DAC CODE

200

160

120

80

40

0

0

10k 20k 30k 40k 50k 60k 70k

MAX542-09

REFERENCE CURRENT (µA)

REFERENCE CURRENT

vs. CODE

DAC CODE