Rainbow Electronics MAX5144 - Manual

General Description
The MAX5141–MAX5144 are serial-input, voltage-output,
14-bit digital-to-analog converters (DACs) in tiny µMAX
packages, 50% smaller than comparable DACs in an
8-pin SO. They operate from low +3V (MAX5143/
MAX5144) or +5V (MAX5141/MAX5142) single supplies.
They provide 14-bit performance (±1LSB INL and DNL)
over temperature without any adjustments. The DAC out-
put is unbuffered, resulting in a low supply current of
120µA and a low offset error of 2LSBs.
The DAC output range is 0V to V REF. For bipolar opera-
tion, matched scaling resistors are provided in the
MAX5142/MAX5144 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 isola-
tion. A power-on reset circuit clears the DAC output to
code 0 (MAX5141/MAX5143) or code 8192 (MAX5142/
MAX5144) when power is initially applied.
A logic low on CLR asynchronously clears the DAC out-
put to code 0 (MAX5141/MAX5143) or code 8192
(MAX5142/MAX5144), independent of the serial interface.
The MAX5141/MAX5143 are available in 8-pin µMAX
packages and the MAX5142/MAX5144 are available in
10-pin µMAX packages.
Applications
High-Resolution and Gain Adjustment
Industrial Process Control
Automated Test Equipment
Data-Acquisition Systems
Features
♦ Miniature (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 (MAX5141/MAX5142) or +3V
(MAX5143/MAX5144) Single-Supply Operation
♦ Full 14-Bit Performance Without Adjustments
♦ Unbuffered Voltage Output Directly Drives 60kΩ
Loads
♦ Power-On Reset Circuit Clears DAC Output to
Code 0 (MAX5141/MAX5143) or Code 8192
(MAX5142/MAX5144)
♦ Schmitt-Trigger Inputs for Direct Optocoupler
Interface
♦ Asynchronous CLR
MAX5141–MAX5144
+3V/+5V, Serial-Input,
Voltage-Output, 14-Bit DACs
________________________________________________________________ Maxim Integrated Products 1
19-1849; Rev 1; 5/01
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.
PART T EM P. RA N G E PIN - PAC K A GE IN L ( L SB )
SU PPL Y
R A NG E ( V)
O U TPU T SWING
M A X5 1 4 1E U A -40 °C to +85°C 8 µMAX ± 1 5 U nip ol ar
M A X5 1 4 2E U B -40 °C to +85°C 10 µMAX ± 1 5 Bi pol ar
M A X5 1 4 3E U A -40 °C to +85°C 8 µMAX ± 1 3 U nip ol ar
M A X5 1 4 4E U B -40 °C to +85°C 10 µMAX ± 1 3 Bi pol ar
10
9
8
7
6
1
2
3
4
5
GND
V DD
RFB
INV DIN
SCLK
CS
REF
TOP VIEW
MAX5142
MAX5144
OUT CLR
µMAX
OUT SCLK
CS
1
2
8
7 V DD
DIN
REF
MAX5141
MAX5143
3
4
6
5
µMAX
GND
CLR
Pin Configurations