19-1082; Rev 2; 12/99
+5V, Serial-Input, Voltage-Output, 16-Bit DACs
General Description
The MAX541/MAX542 are serial-input, voltage-output,
16-bit digital-to-analog converters (DACs) that operate
from a single +5V supply. They provide 16-bit perfor-
mance (±1LSB INL and DNL) over temperature without
any adjustments. The DAC output is unbuffered, result-
ing in a low supply current of 0.3mA and a low offset
error of 1LSB.
The DAC output range is 0V to V
REF
. For bipolar opera-
tion, matched scaling resistors are provided in the
MAX542 for use with an external precision op amp
(such as the MAX400), generating a ±V
REF
output
swing. The MAX542 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 MAX541 is available in 8-pin plastic DIP and SO
packages. The MAX542 is available in 14-pin plastic
DIP and SO packages.
o
+5V Single-Supply Operation
o
Low Power: 1.5mW
o
1µs Settling Time
o
Unbuffered Voltage Output Directly Drives 60kΩ
Loads
o
SPI/QSPI/MICROWIRE-Compatible Serial Interface
o
Power-On Reset Circuit Clears DAC Output to 0V
(unipolar mode)
o
Schmitt Trigger Inputs for Direct Optocoupler
Interface
Features
o
Full 16-Bit Performance Without Adjustments
MAX541/MAX542
Ordering Information
PART
MAX541ACPA
MAX541BCPA
MAX541CCPA
MAX541ACSA
MAX541BCSA
MAX541CCSA
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
PIN-PACKAGE
8 Plastic DIP
8 Plastic DIP
8 Plastic DIP
8 SO
8 SO
8 SO
INL
(LSB)
±1
±2
±4
±1
±2
±4
Applications
High-Resolution Offset and Gain Adjustment
Industrial Process Control
Automated Test Equipment
Data-Acquisition Systems
Ordering Information continued at end of data sheet.
Functional Diagrams
V
DD
RFB
R
FB
INV
General Description
TOP VIEW
REFF
REFS
MAX542
RFB 1
OUT 2
14 V
DD
13 INV
R
INV
16-BIT DAC
OUT
AGNDF
OUT 1
AGND 2
REF 3
CS 4
8 V
DD
AGNDF 3
AGNDS 4
REFS 5
MAX542
12 DGND
11 LDAC
10 DIN
9 N.C.
8 SCLK
MAX541
7 DGND
6 DIN
5 SCLK
REFF 6
CS 7
CS
LDAC
SCLK
DIN
16-BIT DATA LATCH
CONTROL
LOGIC
SERIAL INPUT REGISTER
DGND
AGNDS
DIP/SO
DIP/SO
Functional Diagrams continued at end of data sheet.
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
________________________________________________________________
Maxim Integrated Products
1
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.
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
