MAX551

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


Application

Automatic Calibration
Gain Adjustment
Transducer Drivers
Process-Control I/O Boards
Digitally Controlled Filters
Motion-Controlled Systems
µP-Controlled Systems
Programmable Amplifiers/Attenuators


Specifications

VDD to GND..............................................................................6V
REF, RFB to GND.................................................................±12V
Digital Inputs (SCLK, DIN, LOAD, CLR)
to GND.....................................................................-0.3V to 6V
OUT to GND...............................................-0.3V to (VDD + 0.3V)
AGND to GND............................................-0.3V to (VDD + 0.3V)
Continuous Power Dissipation (TA = +70°C)
Plastic DIP (derate 9.09mW/°C above +70°C) .............727mW
µMAX (derate 5.60mW/°C above +70°C) .....................444mW

Operating Temperature Ranges
MAX55_ _C_ _......................................................0°C to +70°C
MAX55_ _E_ _...................................................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10sec) .............................+300°C

Description

The MAX551/MAX552 are 12-bit, current-output, 4-quadrant 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 register. Data in the DAC register sets the DAC output voltage. 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.