MAX541 Datasheet, PDF (1/12 Pages) Maxim Integrated Products – +5V, Serial-Input, Voltage-Output, 16-Bit DACs

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.
Applications
High-Resolution Offset and Gain Adjustment
Industrial Process Control
Automated Test Equipment
Data-Acquisition Systems
Features
o Full 16-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
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
Ordering Information
PART
MAX541ACPA
MAX541BCPA
MAX541CCPA
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
PIN-PACKAGE
INL
(LSB)
8 Plastic DIP
±1
8 Plastic DIP
±2
8 Plastic DIP
±4
MAX541ACSA 0°C to +70°C 8 SO
±1
MAX541BCSA 0°C to +70°C 8 SO
±2
MAX541CCSA 0°C to +70°C 8 SO
±4
Ordering Information continued at end of data sheet.
Functional Diagrams
General Description
V_DD
TOP VIEW
OUT 1
AGND 2
REF 3
CS 4
MAX541
RFB 1
OUT 2
8 V_DD
7 DGND
6 DIN
5 SCLK
AGNDF 3
AGNDS 4
REFS 5
REFF 6
CS 7
MAX542
14 VDD
13 INV
12 DGND
11 LDAC
10 DIN
9 N.C.
8 SCLK
DIP/SO
DIP/SO
REFF
REFS
CS
LDAC
SCLK
DIN
MAX542
R_INV
R_FB
16-BIT DAC
CONTROL
LOGIC
16-BIT DATA LATCH
SERIAL INPUT REGISTER
RFB
INV
OUT
AGNDF
AGNDS
DGND
Functional Diagrams continued at end of data sheet.
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
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