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MAX5222EKA-T
Dual, 8-Bit, Voltage-Output Serial DAC in 8-Pin SOT23
General DescriptionThe MAX5222 contains two 8-bit, buffered, voltage-out-
put digital-to-analog converters (DAC A and DAC B) in a
small 8-pin SOT23 package. Both DAC outputs can
source and sink 1mA to within 100mV of ground and
VDD. The MAX5222 operates with a single +2.7V to
+5.5V supply.
The device uses a 3-wire serial interface, which oper-
ates at clock rates up to 25MHz and is compatible with
SPI™, QSPI™, and MICROWIRE™ interface standards.
The serial input shift register is 16 bits long and con-
sists of 8 bits of DAC input data and 8 bits for DAC
selection and shutdown control. DAC registers can be
loaded independently or in parallel at the positive edge
of CS.
The MAX5222’s ultra-low power consumption and tiny
8-pin SOT23package make it ideal for portable and
battery-powered applications. Supply current is less
than 1mA and drops below 1µA in shutdown mode. In
addition, the reference input is disconnected from the
REF pin during shutdown, further reducing the system’s
total power consumption.
________________________ApplicationsDigital Gain and Offset Adjustment
Programmable Current Source
Programmable Voltage Source
Power-Amp Bias Control
VCO Tuning
FeaturesOperates from a Single +2.7V to +5.5V SupplyTiny 8-Pin SOT23 Package (3mm ✕3mm)Dual Buffered Voltage OutputLow Power Consumption
0.4mA Operating Current
<1µA Shutdown CurrentProgrammable Shutdown Mode25MHz, 3-Wire Serial InterfaceSPI, QSPI, and MICROWIRECompatible
MAX5222
Dual, 8-Bit, Voltage-Output
Serial DAC in 8-Pin SOT23
Functional Diagram
Pin Configuration19-1720; Rev 0; 4/00
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIREis a trademark of National Semiconductor Corp.
Ordering Information
MAX5222
Dual, 8-Bit, Voltage-Output
Serial DAC in 8-Pin SOT23
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS(VDD= +2.7V to +5.5V, REF = VDD, TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.)
Note 1:The outputs may be shorted to VDDor GND if the package power dissipation is not exceeded. Typical short-circuit current to
GND is 70mA.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
VDDto GND.............................................................-0.3V to +6V
All Other Pins to GND (Note 1)..................-0.3V to (VDD+ 0.3V)
Continuous Power Dissipation (TA= +70°C)
8-Pin SOT23 (derate 8.7mW/°C above +70°C)............696mW
Operating Temperature Range...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
MAX5222
Dual, 8-Bit, Voltage-Output
Serial DAC in 8-Pin SOT23
Note 2:Reduced digital code range (code 24 through code 232) is due to swing limitations of the output amplifiers. See Typical
Operating Characteristics.
Note 3:Reference input resistance is code dependent. The lowest input resistance occurs at code 55hex. See the Reference Input
section.
Note 4:Guaranteed by design. Not production tested.
ELECTRICAL CHARACTERISTICS (continued)(VDD= +2.7V to +5.5V, REF = VDD, TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.)
TIMING CHARACTERISTICS(Figure 3, VDD= +2.7V to +5.5V, TA= TMINto TMAX, unless otherwise noted.) (Note 4)
MAX5222
Dual, 8-Bit, Voltage-Output
Serial DAC in 8-Pin SOT23
__________________________________________Typical Operating Characteristics(VDD= +3V, TA = +25°C, unless otherwise noted.)
MAX5222
Dual, 8-Bit, Voltage-Output
Serial DAC in 8-Pin SOT23
Typical Operating Characteristics (continued)(VDD= +3V, TA = +25°C, unless otherwise noted.)
MAX5222
Dual, 8-Bit, Voltage-Output
Serial DAC in 8-Pin SOT23 ypical Operating Characteristics (continued)(VDD= +3V, TA = +25°C, unless otherwise noted.)
