Rainbow Electronics MAX552 - Manual

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_______________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.
________________________Applications
Automatic Calibration
Gain Adjustment
Transducer Drivers
Process-Control I/O Boards
Digitally Controlled Filters
Motion-Controlled Systems
µP-Controlled Systems
Programmable Amplifiers/Attenuators
____________________________Features
♦ Single-Supply Operation:
+4.5V to +5.25V (MAX551)
+2.7V to +3.6V (MAX552)
♦ 12.5MHz 3-Wire Serial Interface
♦ SPI/QSPI and Microwire Compatible
♦ Power-On Reset Clears DAC Output to Zero
♦ Asynchronous Clear Input Clears DAC Output
to Zero
♦ Voltage Mode or Bipolar Mode Operation with
a Single Power Supply
♦ Schmitt-Trigger Digital Inputs for Direct
Optocoupler Interface
♦ 0.4µA Supply Current
♦ 10-Pin µMAX Package
MAX551/MAX552
+3V/+5V, 12-Bit, Serial, Multiplying DACs
in 10-Pin µMAX Package
________________________________________________________________ Maxim Integrated Products 1
1
2
3
4
5
10
9
8
7
6
RFB
REF
CLR
SCLK V DD
GND
AGND
OUT
MAX551
MAX552
µ
MAX
TOP VIEW
DIN LOAD
SCLK
DIN LOAD
1
2
8
7
RFB
REF GND
V DD
OUT
DIP
3
4
6
5
MAX551
MAX552
19-1260; Rev 0; 10/97
PART
MAX551 ACPA
MAX551BCPA
MAX551ACUB 0°C to +70°C
0°C to +70°C
0°C to +70°C
TEMP. RANGE
PIN-
PACKAGE
8 Plastic DIP
8 Plastic DIP
10 µMAX
______________Ordering Information
Ordering Information continued at end of data sheet.
SPI and QSPI are trademarks of Motorola Inc. Microwire is a trademark of National Semiconductor Corp.
MAX551BCUB
MAX551AEPA
MAX551BEPA -40°C to +85°C
-40°C to +85°C
0°C to +70°C 10 µMAX
8 Plastic DIP
8 Plastic DIP
MAX551AEUB -40°C to +85°C 10 µMAX
MAX551BEUB -40°C to +85°C 10 µMAX
LINEARITY
(LSB)
±1/2
±1
±1/2
±1
±1/2
±1
±1/2
±1
_________________Pin Configurations
12-BIT
D/A CONVERTER
RFB
OUT
AGND*
CLR*
LOAD
V DD
REF
SCLK
GND
* µ MAX PACKAGE ONLY
12-BIT
DAC REGISTER
DIN
R FB
12-BIT
SHIFT REGISTER
POWER-ON
RESET
MAX551
MAX552
________________Functional Diagram