19-1260; Rev 0; 10/97
+3V/+5V, 12-Bit, Serial, Multiplying DACs
in 10-Pin µMAX Package
_______________General Description
The MAX551/MAX552 are 12-bit, current-output, 4-quad-
rant multiplying digital-to-analog converters (DACs).
These devices are capable of providing unipolar or
bipolar outputs when operating from either a single +5V
(MAX551) or +3V (MAX552) power supply. An internal
power-on-reset circuit clears all DAC registers on
power-up, setting the DAC output voltage to 0V.
The SPI™/QSPI™ and Microwire™-compatible 3-wire
serial interface saves board space and reduces power
dissipation compared with parallel-interface devices.
The MAX551/MAX552 feature double-buffered interface
logic with a 12-bit input register and a 12-bit DAC regis-
ter. Data in the DAC register sets the DAC output volt-
age. Data is loaded into the input register via the serial
interface. The
LOAD
input transfers data from the input
register to the DAC register, updating the DAC output
voltage.
The MAX551/MAX552 are available in an 8-pin DIP
package or a space-saving 10-pin µMAX package. The
µMAX package provides an asynchronous clear (CLR)
input that clears all DAC registers when pulled to GND,
setting the output voltage to 0V.
____________________________Features
o
Single-Supply Operation:
+4.5V to +5.25V (MAX551)
+2.7V to +3.6V (MAX552)
o
12.5MHz 3-Wire Serial Interface
o
SPI/QSPI and Microwire Compatible
o
Power-On Reset Clears DAC Output to Zero
o
Asynchronous Clear Input Clears DAC Output
to Zero
o
Voltage Mode or Bipolar Mode Operation with
a Single Power Supply
o
Schmitt-Trigger Digital Inputs for Direct
Optocoupler Interface
o
0.4µA Supply Current
o
10-Pin µMAX Package
MAX551/MAX552
______________Ordering Information
PART
MAX551ACPA
MAX551BCPA
MAX551ACUB
MAX551BCUB
MAX551AEPA
MAX551BEPA
MAX551AEUB
MAX551BEUB
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-
PACKAGE
8 Plastic DIP
8 Plastic DIP
10 µMAX
10 µMAX
8 Plastic DIP
8 Plastic DIP
10 µMAX
10 µMAX
LINEARITY
(LSB)
±1/2
±1
±1/2
±1
±1/2
±1
±1/2
±1
________________________Applications
Automatic Calibration
Gain Adjustment
Transducer Drivers
Process-Control I/O Boards
Digitally Controlled Filters
Motion-Controlled Systems
µP-Controlled Systems
Programmable Amplifiers/Attenuators
Ordering Information continued at end of data sheet.
________________Functional Diagram
REF
R
FB
12-BIT
D/A CONVERTER
CLR*
LOAD
RFB
OUT
AGND*
V
DD
12-BIT
DAC REGISTER
POWER-ON
RESET
GND
_________________Pin Configurations
TOP VIEW
OUT
1
GND
2
V
DD
3
LOAD
4
8
RFB
7
REF
OUT
1
AGND
2
GND
3
6
SCLK
V
DD
4
5
DIN
LOAD
5
10
RFB
9
REF
MAX551
MAX552
MAX551
MAX552
8
CLR
7
SCLK
6
DIN
MAX551
MAX552
12-BIT
SHIFT REGISTER
*µMAX PACKAGE ONLY
DIN
SCLK
DIP
µMAX
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 408-737-7600 ext. 3468.
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
