19-1082; Rev 2; 12/99
+5V, Serial-Input, Voltage-Output, 16-Bit DACs
General Description
Features
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 ( 1ꢀLS ꢁIꢀ and DIꢀ) over temperature ꢂithout
any adjustments. The DAC output is unbuffered, result-
ing in a loꢂ supply current of 0.3mA and a loꢂ offset
error of 1ꢀLS.
ꢀ Full 16-Bit Performance Without Adjustments
ꢀ +5V Single-Supply Operation
ꢀ Low Power: 1.5mW
ꢀ 1µs Settling Time
ꢀ Unbuffered Voltage Output Directly Drives 60kΩ
Loads
The DAC output range is 0V to V
. For bipolar opera-
REF
ꢀ SPI/QSPI/MICROWIRE-Compatible Serial Interface
tion, matched scaling resistors are provided in the
MAX542 for use ꢂith an external precision op amp
(such as the MAX400), generating a
ꢀ Power-On Reset Circuit Clears DAC Output to 0V
V
output
REF
(unipolar mode)
sꢂing. The MAX542 also includes Kelvin-sense con-
nections for the reference and analog ground pins to
reduce layout sensitivity.
ꢀ Schmitt Trigger Inputs for Direct Optocoupler
Interface
A 16-bit serial ꢂord is used to load data into the DAC
latch. The 10MHz, 3-ꢂire serial interface is compatible
ꢂith LPꢁ™/QLPꢁ™/MꢁCROWꢁRE™, and it also interfaces
directly ꢂith optocouplers for applications requiring isola-
tion. A poꢂer-on reset circuit clears the DAC output to 0V
(unipolar mode) ꢂhen poꢂer is initially applied.
Ordering Information
INL
(LSB)
PART
TEMP. RANGE
PIN-PACKAGE
MAX541ACPA
MAX541SCPA
MAX541CCPA
MAX541ACLA
MAX541SCLA
MAX541CCLA
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
8 Plastic DꢁP
8 Plastic DꢁP
8 Plastic DꢁP
8 LO
1
2
4
1
2
4
The MAX541 is available in 8-pin plastic DꢁP and LO
packages. The MAX542 is available in 14-pin plastic
DꢁP and LO packages.
8 LO
Applications
High-Resolution Offset and Gain Adjustment
ꢁndustrial Process Control
8 LO
Ordering Information continued at end of data sheet.
Automated Test Equipment
Functional Diagrams
Data-Acquisition Lystems
V
DD
General Description
RFB
INV
TOP VIEW
MAX542
R
FB
R
INV
REFF
REFS
V
14
RFB
OUT
1
2
3
4
5
6
7
DD
16-BIT DAC
OUT
13 INV
MAX542
AGNDF
AGNDS
AGNDF
AGNDS
REFS
REFF
12 DGND
1
2
3
4
8
7
6
5
V
DD
OUT
AGND
REF
16-BIT DATA LATCH
CS
LDAC
SCLK
DIN
11
10
9
LDAC
DIN
DGND
DIN
CONTROL
LOGIC
MAX541
N.C.
SERIAL INPUT REGISTER
DGND
CS
SCLK
CS
8
SCLK
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
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