_______________General Description
The MAX512/MAX513 contain three 8-bit, voltage-output
digital-to-analog converters (DAC A, DAC B, and DAC C).
Output buffer amplifiers for DACs A and B provide voltage
outputs while reducing external component count. The
output buffer for DAC A can source or sink 5mA to within
0.5V of V
DD
or V
SS
. The buffer for DAC B can source or
sink 0.5mA to within 0.5V of V
DD
or V
SS
. DAC C is
unbuffered, providing a third voltage output with increased
accuracy. The MAX512 operates with a single
+5V ±10% supply, and the MAX513 operates with a
+2.7V to +3.6V supply. Both devices can also operate
with split supplies.
The 3-wire serial interface has a maximum operating fre-
quency of 5MHz and is compatible with SPI™, QSPI™,
and Microwire™. The serial input shift register is 16 bits
long and consists of 8 bits of DAC input data and 8 bits
for DAC selection and shutdown. DAC registers can be
loaded independently or in parallel at the positive edge
of
–
C
—
S
–
. A latched logic output is also available for auxil-
iary control.
Ultra-low power consumption and small packages
(14-pin DIP/SO) make the MAX512/MAX513 ideal for
portable and battery-powered applications. Supply cur-
rent is only 1mA, dropping to less than 1µA in shutdown.
Any of the three DACs can be independently shut down.
In shutdown mode, the DAC's R-2R ladder network is
disconnected from the reference input, minimizing sys-
tem power consumption.
________________________Applications
Digital Gain and Offset Adjustment
Programmable Attenuators
Programmable Current Sources
Programmable Voltage Sources
RF Digitally Adjustable Bias Circuits
VCO Tuning
____________________________Features
♦ Operate from a Single +5V (MAX512) or
+3V (MAX513) Supply, or from Bipolar Supplies
♦ Low Power Consumption
1mA Operating Current
<1µA Shutdown Current
♦ Unipolar or Bipolar Outputs
♦ 5MHz, 3-Wire Serial Interface
♦ SPI, QSPI, and Microwire Compatible
♦ Two Buffered, Bipolar-Output DACs (DACs A/B)
♦ Independently Programmable Shutdown Mode
♦ Space-Saving 14-Pin SO/DIP Packages
♦ Pin and Software Reset
______________Ordering Information
Ordering Information continued at end of data sheet.
* Contact factory for dice specifications.
MAX512/MAX513
Low-Cost, Triple, 8-Bit Voltage-Output DACs
with Serial Interface
________________________________________________________________
Maxim Integrated Products
1
DAC
LATCH
A
DAC A
DAC
LATCH
B
DAC B
DAC
LATCH
C
LATCH
DAC C
SCLK
OUTA
OUTB
OUTC
LOUT
DIN CS REFAB REFC
RESET
V
DD
V
SS
GND
16-BIT SHIFT REGISTER
CONTROL (8) DATA (8)
MAX512
MAX513
12
4
567
8
9
10
1112
14
3
________________Functional Diagram
1
2
3
4
14
13
12
11
LOUT
I.C.
REFAB
REFC
RESET
SCLK
CS
DIN
DIP/SO
TOP VIEW
MAX512
MAX513
5
6
7
10
9
8
OUTC
OUTB
OUTA
V
SS
GND
V
DD
__________________Pin Configuration
19-0252; Rev 2; 5/96
PART TEMP. RANGE PIN-PACKAGE
MAX512CPD
0°C to +70°C 14 Plastic DIP
MAX512CSD 0°C to +70°C 14 SO
MAX512C/D 0°C to +70°C Dice*
Microwire is a trademark of National Semiconductor Corp. SPI and QSPI are trademarks of Motorola Inc.
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
