Rainbow Electronics MAX5444 - Manual

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 isola-
tion. 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
♦ 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 DD
♦ +5V (MAX5441/MAX5442) or +3V
(MAX5443/MAX5444) Single-Supply Operation
♦ Full 16-Bit Performance Without Adjustments
♦ Unbuffered Voltage Output Directly Drives
60k Ω 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
10
9
8
7
6
1
2
3
4
5
GND
V DD
RFB
INV DIN
SCLK
CS
REF
TOP VIEW
MAX5442
MAX5444
OUT CLR
µMAX-8
OUT SCLK
CS
1
2
8
7 V DD
DIN
REF
MAX5441
MAX5443
3
4
6
5
µMAX-10
GND
CLR
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.
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 ±2 5
MAX5441BCUA 0 °C to +70°C 8 µMAX ±4 5
MAX5441BEUA -40 °C to +85°C 8 µMAX ±4 5
MAX5442ACUB 0 °C to +70°C 10 µMAX ±2 5
MAX5442AEUB -40 °C to +85°C 10 µMAX ±2 5
MAX5442BCUB 0 °C to +70°C 10 µMAX ±4 5
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/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.