19-1082; Rev 2; 12/99
+5V, Serial-Input, Voltage-Output, 16-Bit DACs
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
TEMP. RANGE
MAX541ACPA
INL
(LSB)
PIN-PACKAGE
0°C to +70°C
8 Plastic DIP
±1
The MAX541 is available in 8-pin plastic DIP and SO
packages. The MAX542 is available in 14-pin plastic
DIP and SO packages.
MAX541BCPA
0°C to +70°C
8 Plastic DIP
±2
MAX541CCPA
0°C to +70°C
8 Plastic DIP
±4
MAX541ACSA
0°C to +70°C
8 SO
±1
Applications
MAX541BCSA
0°C to +70°C
8 SO
±2
MAX541CCSA
0°C to +70°C
8 SO
±4
High-Resolution Offset and Gain Adjustment
Ordering Information continued at end of data sheet.
Industrial Process Control
Automated Test Equipment
Functional Diagrams
Data-Acquisition Systems
General Description
VDD
TOP VIEW
RFB
MAX542
RFB
INV
RFB 1
OUT 1
AGND 2
8 VDD
MAX541
7 DGND
CS 4
13 INV
AGNDF 3
MAX542
AGNDS 4
5 SCLK
10 DIN
REFF 6
RINV
16-BIT DAC
9 N.C.
OUT
REFS
AGNDF
12 DGND
11 LDAC
REFS 5
6 DIN
REF 3
14 VDD
OUT 2
REFF
CS
LDAC
SCLK
DIN
16-BIT DATA LATCH
AGNDS
CONTROL
LOGIC
SERIAL INPUT REGISTER
8 SCLK
CS 7
DGND
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.
MAX541/MAX542
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 performance (±1LSB INL and DNL) over temperature without
any adjustments. The DAC output is unbuffered, resulting in a low supply current of 0.3mA and a low offset
error of 1LSB.
The DAC output range is 0V to VREF. For bipolar operation, 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 connections 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 isolation. A power-on reset circuit clears the DAC output to 0V
(unipolar mode) when power is initially applied.
