MAX512ESD Datasheet Download

Part No.:
MAX512ESD
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Download Datasheet
Description:
[Low-Cost, Triple, 8-Bit Voltage-Output DACs with Serial Interface]
File Size:
180 K
Page:
16 Pages
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Manufacturer:
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
PCB Prototype
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19-0252; Rev 2; 5/96
Low-Cost, Triple, 8-Bit Voltage-Output DACs
with Serial Interface
_______________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 CS. 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.
____________________________Features
o
Operate from a Single +5V (MAX512) or
+3V (MAX513) Supply, or from Bipolar Supplies
o
Low Power Consumption
1mA Operating Current
<1µA Shutdown Current
o
Unipolar or Bipolar Outputs
o
5MHz, 3-Wire Serial Interface
o
SPI, QSPI, and Microwire Compatible
o
Two Buffered, Bipolar-Output DACs (DACs A/B)
o
Independently Programmable Shutdown Mode
o
Space-Saving 14-Pin SO/DIP Packages
o
Pin and Software Reset
MAX512/MAX513
______________Ordering Information
PART
MAX512CPD
MAX512CSD
MAX512C/D
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
PIN-PACKAGE
14 Plastic DIP
14 SO
Dice*
Ordering Information continued at end of data sheet.
* Contact factory for dice specifications.
________________Functional Diagram
DIN
1
SCLK
3
DAC
LATCH
A
DAC A
CS
2
REFAB REFC
12
11
________________________Applications
Digital Gain and Offset Adjustment
Programmable Attenuators
Programmable Current Sources
Programmable Voltage Sources
RF Digitally Adjustable Bias Circuits
VCO Tuning
OUTA
8
16-BIT SHIFT REGISTER
DATA (8)
__________________Pin Configuration
TOP VIEW
DIN
CS
1
2
14
LOUT
13
I.C.
DAC
LATCH
B
DAC B
OUTB
9
DAC
LATCH
C
DAC C
OUTC
10
CONTROL (8)
SCLK
3
RESET
4
V
DD
GND
5
6
MAX512
MAX513
12
REFAB
11
REFC
10
OUTC
9
8
OUTB
OUTA
MAX512
MAX513
LATCH
LOUT
14
5
V
DD
7
V
SS
6
GND
V
SS
7
DIP/SO
4
RESET
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