MAX509 Datasheet, PDF (1/20 Pages) Maxim Integrated Products – Quad, Serial 8-Bit DACs with Rail-to-Rail Outputs

19-0155; Rev 2; 1/96
Quad, Serial 8-Bit DACs
with Rail-to-Rail Outputs
_______________General Description
The MAX509/MAX510 are quad, serial-input, 8-bit volt-
age-output digital-to-analog converters (DACs). They
operate with a single +5V supply or dual ±5V supplies.
Internal, precision buffers swing rail-to-rail. The refer-
ence input range includes both supply rails.
The MAX509 has four separate reference inputs, allow-
ing each DAC's full-scale range to be set independently.
20-pin DIP, SSOP, and SO packages are available. The
MAX510 is identical to the MAX509 except it has two ref-
erence inputs, each shared by two DACs. The MAX510
is housed in space-saving 16-pin DIP and SO packages.
The serial interface is double-buffered: A 12-bit input
shift register is followed by four 8-bit buffer registers and
four 8-bit DAC registers. A 12-bit serial word is used to
load data into each register. Both input and DAC regis-
ters can be updated independently or simultaneously
with single software commands. Two additional asyn-
chronous control pins provide simultaneous updating
(LDAC) or clearing (CLR) of input and DAC registers.
The interface is compatible with Microwire^TM and SPI/
QSPI^TM. All digital inputs and outputs are TTL/CMOS
compatible. A buffered data output provides for read-
back or daisy-chaining of serial devices.
_______________Functional Diagrams
CLR
DOUT _LDAC AGND DGND VSS VDD REFB REFA
DECODE
CONTROL
MAX509
INPUT
REG A
DAC
REG A
DAC A
OUTA
12-BIT
SHIFT
REGISTER
INPUT
REG B
DAC
REG B
DAC B
INPUT
REG C
DAC
REG C
DAC C
OUTB
OUTC
SR
CONTROL
INPUT
REG D
DAC
REG D
DAC D
OUTD
____________________________Features
o Single +5V or Dual ±5V Supply Operation
o Output Buffer Amplifiers Swing Rail-to-Rail
o Reference Input Range Includes Both Supply Rails
o Calibrated Offset, Gain, and Linearity (1LSB TUE)
o 10MHz Serial Interface, Compatible with SPI, QSPI
(CPOL = CPHA = 0) and Microwire
o Double-Buffered Registers for Synchronous
Updating
o Serial Data Output for Daisy-Chaining
o Power-On Reset Clears Serial Interface and Sets
All Registers to Zero
______________Ordering Information
PART
MAX509ACPP
MAX509BCPP
MAX509ACWP
MAX509BCWP
MAX509ACAP
MAX509BCAP
MAX509BC/D
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
PIN-PACKAGE
20 Plastic DIP
20 Plastic DIP
20 Wide SO
20 Wide SO
20 SSOP
20 SSOP
Dice*
TUE
(LSB)
±1
±1 1/2
±1
±1 1/2
±1
±1 1/2
±1 1/2
Ordering Information continued on last page.
* Dice are specified at +25°C, DC parameters only.
**Contact factory for availability and processing to MIL-STD-883.
_________________Pin Configurations
TOP VIEW
OUTB ₁
OUTA 2
VSS ₃
REFB ₄
REFA 5
AGND 6
N.C. ₇
DGND ₈
LDAC ₉
DOUT ₁₀
MAX509
20 ^OUTC
19 OUTD
18 VDD
17 REFC
16 REFD
15 CS
14 N.C.
13 SCLK
12 DIN
11 CLR
CS DIN SCLK
REFC REFD
Functional Diagrams continued at end of data sheet.
DIP/SO/SSOP
Pin Configurations continued at end of data sheet.
Microwire is a trademark of National Semiconductor. SPI and QSPI are trademarks of Motorola.
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