19-0252; Rev 2; 5/96
Lo w -Co s t , Trip le , 8 -Bit Vo lt a g e -Ou t p u t DACs
w it h S e ria l In t e rfa c e
2/MAX513
_______________Ge n e ra l De s c rip t io n
____________________________Fe a t u re s
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
♦ Operate from a Single +5V (MAX512) or
+3V (MAX513) Supply, or from Bipolar Supplies
♦ Low Power Consumption
1mA Operating Current
<1µA Shutdown Current
0.5V of V or V . The buffer for DAC B can source or
DD
SS
s ink 0.5mA to within 0.5V of V
unbuffered, providing a third voltage output with increased
a c c ura c y. The MAX512 op e ra te s with s ing le
or V . DAC C is
DD
SS
♦ Unipolar or Bipolar Outputs
♦ 5MHz, 3-Wire Serial Interface
a
♦ 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
+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
______________Ord e rin g In fo rm a t io n
loaded independently or in parallel at the positive edge
–—–
of CS. A latched logic output is also available for auxil-
PART
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
PIN-PACKAGE
14 Plastic DIP
14 SO
iary control.
MAX512CPD
MAX512CSD
MAX512C/D
Ultra -low p owe r c ons ump tion a nd s ma ll p a c ka g e s
(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.
Dice*
Ordering Information continued at end of data sheet.
* Contact factory for dice specifications.
________________Fu n c t io n a l Dia g ra m
________________________Ap p lic a t io n s
DIN
1
CS
2
REFAB REFC
12 11
Digital Gain and Offset Adjustment
Programmable Attenuators
Programmable Current Sources
Programmable Voltage Sources
RF Digitally Adjustable Bias Circuits
VCO Tuning
SCLK
3
OUTA
8
DAC
DAC A
LATCH
A
OUTB
9
DAC
LATCH
B
DAC B
DAC C
__________________P in Co n fig u ra t io n
TOP VIEW
DIN
CS
DAC
LATCH
C
1
2
3
4
5
6
7
14
13
12
LOUT
I.C.
OUTC
10
MAX512
MAX513
SCLK
RESET
REFAB
MAX512
MAX513
11 REFC
V
DD
10
9
OUTC
OUTB
OUTA
LOUT
14
LATCH
GND
V
SS
8
4
5
7
6
V
DD
V
SS
GND
RESET
DIP/SO
Microwire is a trademark of National Semiconductor Corp. SPI and QSPI are trademarks of Motorola Inc.
________________________________________________________________ Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800