Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsData collecting ICsData acquisition IC - DA converter (DAC) uMAX 8

General Description

The MAX5441–MAX5444 are serial-input, voltage-out-

put, 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 sup-

plies. 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 preci-

sion 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 out-

put 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 10-

pin µMAX packages.

Applications

High-Resolution Offset and Gain Adjustment

Industrial Process Control

Automated Test Equipment

Data-Acquisition Systems

Features

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

o Low 120µA Supply Current

o Fast 1µs Settling Time

o 25MHz SPI/QSPI/MICROWIRE-Compatible Serial

Interface

o V

REF

Range Extends to V

o +5V (MAX5441/MAX5442) or +3V

(MAX5443/MAX5444) Single-Supply Operation

o Full 16-Bit Performance Without Adjustments

o Unbuffered Voltage Output Directly Drives

60kΩ Loads

o Power-On Reset Circuit Clears DAC Output to

Code 0 (MAX5441/MAX5443) or Code 32768

(MAX5442/MAX5444)

o Schmitt-Trigger Inputs for Direct Optocoupler

Interface

o Asynchronous CLR

MAX5441–MAX5444

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

Voltage-Output, 16-Bit DACs

________________________________________________________________

Maxim Integrated Products

GND

RFB

INV

DIN

SCLK

REF

TOP VIEW

MAX5442

MAX5444

OUT

CLR

µMAX-8

OUT

SCLK

DIN

REF

MAX5441

MAX5443

µMAX-10

GND

CLR

Pin Configurations

19-1846; Rev 3; 1/09

Ordering Information

µMAX is a registered trademark of Maxim Integrated Products, Inc.

QSPI is a trademark of Motorola, Inc.

MICROWIRE is a registered trademark of National Semiconductor Corp.

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

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 Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

EVALUATION KIT

AVAILABLE

Denotes a lead(Pb)-free/RoHS-compliant package.

Note: For leaded version, contact factory.

Summary of content (12 pages)

PAGE 1
9-1846; Rev 3; 1/09 KIT ATION EVALU E L B A IL AVA +3V/+5V, Serial-Input, Voltage-Output, 16-Bit DACs 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.
PAGE 2
MAX5441–MAX5444 +3V/+5V, Serial-Input, Voltage-Output, 16-Bit DACs ABSOLUTE MAXIMUM RATINGS VDD to GND ..............................................................-0.3V to +6V CS, SCLK, DIN, CLR to GND ...................................-0.3V to +6V REF to GND ................................................-0.3V to (VDD + 0.3V) OUT, INV to GND .....................................................-0.3V to VDD RFB to INV ...................................................................
PAGE 3
+3V/+5V, Serial-Input, Voltage-Output, 16-Bit DACs (VDD = +3V (MAX5443/MAX5444) or +5V (MAX5441/MAX5442), VREF = +2.5V, CL = 10pF, GND = 0, RL = ∞, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.
PAGE 4
__________________________________________Typical Operating Characteristics (VDD = +3V (MAX5443/MAX5444) or +5V (MAX5441/MAX5442), VREF = +2.5V, GND = 0, RL = ∞, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) VDD = +3V 0.075 0.050 0.10 0.09 0.08 0.07 0.025 MAX5441/44 toc03 0.11 0.12 0.11 SUPPLY CURRENT (mA) 0.100 MAX5441/44 toc02 VDD = +5V 0.12 SUPPLY CURRENT (mA) SUUPLY CURRENT (mA) 0.125 MAX5441/44 toc01 0.150 SUPPLY CURRENT vs.
PAGE 5
+3V/+5V, Serial-Input, Voltage-Output, 16-Bit DACs FULL-SCALE STEP RESPONSE (FALLING) REFERENCE CURRENT vs.
PAGE 6
MAX5441–MAX5444 +3V/+5V, Serial-Input, Voltage-Output, 16-Bit DACs Pin Description PIN MAX5441 MAX5443 1 MAX5442 MAX5444 1 NAME FUNCTION REF Voltage Reference Input 2 2 CS Chip-Select Input 3 3 SCLK 4 4 DIN Serial Data Input 5 5 CLR Clear Input. Logic low asynchronously clears the DAC to code 0 (MAX5441/MAX5443) or code 32768 (MAX5442/MAX5444). 6 6 OUT DAC Output Voltage — 7 INV Junction of Internal Scaling Resistors. Connect to external op amp’s inverting input in bipolar mode.
PAGE 7
+3V/+5V, Serial-Input, Voltage-Output, 16-Bit DACs MAX5441–MAX5444 +2.5V MAX6166 +3V/+5V 1µF 0.1µF 0.1µF (GND) REF VDD MC68XXXX PCS0 CS MOSI DIN SCLK SCLK IC1 CLR UNIPOLAR OUT MAX495 MAX5441 MAX5442 MAX5443 MAX5444 OUT EXTERNAL OP AMP GND Figure 2a. Typical Operating Circuit—Unipolar Output MAX6166 +3V/+5V +2.5V 1µF 0.1µF 0.
PAGE 8
MAX5441–MAX5444 +3V/+5V, Serial-Input, Voltage-Output, 16-Bit DACs to a standard R-2R ladder, allowing unbuffered operation in medium-load applications. The MAX5442/MAX5444 provide matched bipolar offset resistors, which connect to an external op amp for bipolar output swings (Figure 2b). Digital Interface The MAX5441–MAX5444 digital interface is a standard 3-wire connection compatible with SPI/QSPI/ MICROWIRE interfaces.
PAGE 9
+3V/+5V, Serial-Input, Voltage-Output, 16-Bit DACs Unbuffered Operation Unbuffered operation reduces power consumption as well as offset error contributed by the external output buffer. The R-2R DAC output is available directly at OUT, allowing 16-bit performance from +VREF to GND without degradation at zero-scale. The DAC’s output impedance is also low enough to drive medium loads (RL > 60kΩ) without degradation of INL or DNL; only the gain error is increased by externally loading the DAC output.
PAGE 10
MAX5441–MAX5444 +3V/+5V, Serial-Input, Voltage-Output, 16-Bit DACs Unipolar Configuration Figure 2a shows the MAX5441–MAX5444 configured for unipolar operation with an external op amp. The op amp is set for unity gain, and Table 1 lists the codes for this circuit. The bipolar MAX5442/MAX5444 can also be used in unipolar configuration by connecting RFB and INV to REF. This allows the DAC to power-up to midscale.
PAGE 11
+3V/+5V, Serial-Input, Voltage-Output, 16-Bit DACs VDD VDD MAX5441 MAX5443 REF REF OUT 16-BIT DAC CS SCLK DIN RFB INV MAX5442 MAX5444 CS 16-BIT DATA LATCH SCLK CONTROL LOGIC DIN SERIAL INPUT REGISTER CLR OUT 16-BIT DAC 16-BIT DATA LATCH CONTROL LOGIC SERIAL INPUT REGISTER CLR GND GND Ordering Information (continued) INL (LSB) SUPPLY (V) MAX5443ACUA+ PART TEMP RANGE 0°C to +70°C 8 µMAX PIN-PACKAGE ±2 3 MAX5443AEUA+ -40°C to +85°C 8 µMAX ±2 3 MAX5443BCUA+ 0°C to +70°C 8 µM
PAGE 12
MAX5441–MAX5444 +3V/+5V, Serial-Input, Voltage-Output, 16-Bit DACs Revision History REVISION NUMBER REVISION DATE 0 10/00 Initial release — 2 10/07 Changed timing diagram 6 3 1/09 Added lead-free notation in Ordering Information. DESCRIPTION PAGES CHANGED 1, 11 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied.