MAX544 Maxim, MAX544 Datasheet
MAX544
Manufacturer Part Number
MAX544
Description
+5V / Serial-Input / Voltage-Output / 14-Bit DACs
Manufacturer
Maxim
Datasheet
1.MAX544.pdf
(12 pages)
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The MAX544/MAX545 are serial-input, voltage-output,
14-bit digital-to-analog converters (DACs) that operate
from a single +5V supply. They provide 14-bit perfor-
mance (±0.5LSB INL and ±0.9LSB DNL) over tempera-
ture without any adjustments. The DAC output is
unbuffered, resulting in a low supply current of 0.3mA
and a low offset error of 0.6mV.
The DAC output range is 0V to V
tion, matched scaling resistors are provided in the
MAX545 for use with an external precision op amp
(such as the MAX400), generating a ±V
swing. The MAX545 also includes Kelvin-sense con-
nections 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 isola-
tion. A power-on reset circuit clears the DAC output to 0V
(unipolar mode) when power is initially applied.
The MAX544 is available in 8-pin plastic DIP and SO
packages. The MAX545 is available in 14-pin plastic
DIP and SO packages.
19-1088; Rev 3; 12/99
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
AGND
OUT
REF
CS
TOP VIEW
+5V, Serial-Input, Voltage-Output, 14-Bit DACs
1
2
3
4
Digital Offset and Gain Adjustment
Instrumentation
Industrial Process Control
Automated Test Equipment
Data-Acquisition Systems
DIP/SO
MAX544
________________________________________________________________ Maxim Integrated Products
8
7
6
5
V
DGND
DIN
SCLK
General Description
DD
Pin Configurations
AGNDF
AGNDS
REFS
REFF
OUT
RFB
CS
REF.
1
2
3
4
5
6
7
Applications
For bipolar opera-
MAX545
DIP/SO
REF
14
13
12
11
10
8
9
output
V
INV
DGND
LDAC
DIN
N.C.
SCLK
DD
o Full 14-Bit Performance Without Adjustments
o +5V Single-Supply Operation
o Low Power: 1.5mW
o 1µs Settling Time
o Unbuffered Voltage Output Directly Drives 60kΩ
o SPI/QSPI/MICROWIRE-Compatible Serial Interface
o Power-On Reset Circuit Clears DAC Output to 0V
o Schmitt-Trigger Inputs for Direct Optocoupler
o Pin-Compatible 16-Bit Upgrades
Ordering Information continued at end of data sheet.
MAX544ACPA
MAX544BCPA
MAX544ACSA
MAX544BCSA
Functional Diagrams continued at end of data sheet.
Loads
(unipolar mode)
Interface
(MAX541/MAX542)
REFS
LDAC
SCLK
REFF
DIN
CS
PART
MAX545
CONTROL
LOGIC
R
INV
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
Ordering Information
Functional Diagrams
SERIAL INPUT REGISTER
DGND
V
DD
DATA LATCH
R
14-BIT DAC
FB
PIN-PACKAGE
8 Plastic DIP
8 Plastic DIP
8 SO
8 SO
Features
RFB
INV
OUT
AGNDF
AGNDS
(LSB)
±1/2
±1/2
INL
±1
±1
1
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