Rainbow Electronics MAX5541 User Manual

General Description

The MAX5541 serial-input, voltage-output, 16-bit monotonic digital-to-analog converter (DAC) operates from a single +5V supply. The DAC output is unbuffered, resulting in a low 0.3mA supply current and low 1LSB offset error. The DAC output range is 0V to V

. The DAC latch accepts a 16-bit serial word. A power-on reset (POR) circuit clears the DAC output to 0V (unipolar mode) when power is initially applied.

The 10MHz 3-wire serial interface is SPI™/QSPI™/ MICROWIRE™-compatible and interfaces directly with optocouplers for applications requiring isolation. The MAX5541 is available in an 8-pin SO package. For the 1LSB (max) INL version, refer to the MAX541 data sheet.

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

♦ Choose MAX541 as a 1LSB (max) INL Upgrade to

the MAX5541

MAX5541

Low-Cost, +5V, Serial-Input,

Voltage-Output, 16-Bit DAC

________________________________________________________________ Maxim Integrated Products 1

Pin Configuration

16-BIT DAC

16-BIT DATA LATCH

SERIAL INPUT REGISTER

CONTROL

LOGIC

MAX5541

REF

DIN

SCLK

AGND

OUT

DGND

Functional Diagram

19-1572; Rev 2; 6/02

PART

MAX5541CSA

MAX5541ESA -40°C to +85°C

0°C to +70°C

TEMP RANGE PIN-PACKAGE

8 SO

Ordering Information

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

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.

TOP VIEW

OUT

AGND

REF

MAX5541

DGND

DIN

SCLK

MAX5541

Low-Cost, +5V, Serial-Input, Voltage-Output, 16-Bit DAC

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VDD= +5V ±5%, V

REF

= +2.5V, V

AGND

= V

DGND

= 0, TA= T

MIN

to T

MAX

, unless otherwise noted. Typical values are at 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 DGND............................................................-0.3V to +6V

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

REF to AGND, DGND..................................-0.3V to (V

+0.3V)

AGND to DGND.....................................................-0.3V to +0.3V

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

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

Continuous Power Dissipation (T

= +70°C)

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

Operating Temperature Ranges

MAX5541CSA .....................................................0°C to +70°C

MAX5541ESA ..................................................-40°C to +85°C

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

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

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

(Note 5)

(Note 4)

4.75V ≤ VDD≤ 5.25V

TA= T

MIN

to T

MAX

TA= +25°C

TA= T

MIN

to T

MAX

TA= +25°C

TA= T

MIN

to T

MAX

(Note 3)

CONDITIONS

kΩ11.5R

REF

Reference Input Resistance

V2.0 3.0V

REF

Reference Input Range

PSRPower-Supply Rejection LSB±1.0

OUT

DAC Output Resistance kΩ6.25

Bits16NResolution

ppm/°C±0.1Gain-Error Tempco

LSB

±10

Gain Error (Note 2)

±5

ppm/°C±0.05ZS

Zero-Code Tempco

LSBINLIntegral Nonlinearity ±4 ±16

±1

±2

Zero-Code Offset Error

UNITSMIN TYP MAXSYMBOLPARAMETER

ZSE LSB

To ±1/2LSB of FS, CL= 10pF

1 µsOutput Settling Time

VDD= 5V (Note 1)

Guaranteed monotonic Bits±0.5 ±1.0DNLDifferential Nonlinearity

CL= 10pF (Note 6) 25 V/µsSRVoltage Output Slew-Rate

Major-carry transition 10 nVsDAC Glitch Impulse

Code = 0000 hex, CS = VDD, SCLK = V

DIN

= 0 to VDDlevels

10 nVsDigital Feedthrough

Code = FFFF hex 1 MHzBWReference -3dB Bandwidth

DYNAMIC PERFORMANCE—REFERENCE SECTION

Code = 0000 hex, V

REF

= 1V

P-P

at 100kHz 1 mV

P-P

Reference Feedthrough

92 dBSNRSignal-to-Noise Ratio

Code = 0000 hex 75

pFC

Reference Input Capacitance

STATIC PERFORMANCE—ANALOG SECTION (RL= ∞)

REFERENCE INPUT

DYNAMIC PERFORMANCE—ANALOG SECTION (RL= ∞)

Code = FFFF hex 120

MAX5541

Low-Cost, +5V, Serial-Input,

Voltage-Output, 16-Bit DAC

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(VDD= +5V ±5%, V

REF

= +2.5V, V

AGND

= V

DGND

= 0, TA= T

MIN

to T

MAX

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

TIMING CHARACTERISTICS

(VDD= +5V ±5%, V

REF

= +2.5V, V

AGND

= V

DGND

= 0, CMOS inputs, TA= T

MIN

to T

MAX

, unless otherwise noted.)

Note 1: Refer to the MAX541 for the 1LSB (max) INL version. Note 2: Gain error tested at V

REF

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

Note 3: R

OUT

tolerance is typically ±20%.

Note 4: Min/max ranges guaranteed by gain-error test. Operation outside min/max limits will result in degraded performance. Note 5: Reference input resistance is code dependent, minimum at 8555 hex. Note 6: Slew-rate value is measured from 0% to 63%. Note 7: Guaranteed by design. Not production tested.

VIN= 0

(Note 7)

CONDITIONS

mW1.5PDPower Dissipation

mA0.3 1.1I

Positive Supply Current

V4.75 5.25V

Positive Supply Range

V0.40V

Hysteresis Voltage

pF10C

Input Capacitance

µA±1I

Input Current

V0.8V

Input Low Voltage

V2.4V

Input High Voltage

UNITSMIN TYP MAXSYMBOLPARAMETER

(Note 7)

CONDITIONS

µs20

VDDHigh to CS Low (power-up delay)

ns45t

SCLK Pulse Width Low

ns45t

MHz10f

CLK

SCLK Frequency

SCLK Pulse Width High

ns0t

DIN to SCLK High Hold

ns40t

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

STATIC PERFORMANCE—REFERENCE SECTIONSTATIC PERFORMANCE—DIGITAL INPUTS

POWER SUPPLY

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