Complete Dual 12-Bit DAC
No External Components
+5 V Single-Supply Operation 10%
4.095 V Full Scale (1 mV/LSB)
Buffered Voltage Outputs
Low Power: 5 mW/DAC
Space Saving 1.5 mm Height SO-14 Package
Digitally Controlled Calibration
Servo Controls
Process Control Equipment
Computer Peripherals
Portable Instrumentation
Cellular Base Stations Voltage Adjustment
AD8522AR产品描述
The AD8522 is a complete dual 12-bit, single-supply, voltage output DAC in a 14-pin DIP, or SO-14 surface mount package.Fabricated in a CBCMOS process, features include a serial digi-tal interface, onboard reference, and buffered voltage output.Ideal for +5 V-only systems, this monolithic device offers low cost and ease of use, and requires no external components to realize the full performance of the device.
The serial digital interface allows interfacing directly to numer-ous microcontroller ports, with a simple high speed, three-wire data, clock, and load strobe format. The 16-bit serial word con-tains the 12-bit data word and DAC select address, whic h is de -coded internally or can be decoded externally using LDA, LDBinputs. A serial data output allows the user to easily daisy-chain multiple devices in conjunction with a chip select input. A reset RS input sets the outputs to zero scale or midscale, as deter-mined by the input MSB.
The output 4.095 V full scale is laser trimmed to maintain accu-racy over the operating temperature range of the device, and gives the user an easy-to-use one-millivolt-per-bit resolution. A 2.5 V reference output is also available externally for other data acquisition circuitry, and for ratiometric applications. The out-put buffers are capable of driving ±5 mA.
The AD8522 is available in the 14-pin plastic DIP and low pro-file 1.5 mm SOIC-14 packages.
REV. A
Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
AD8522AR最大额定值
VDD to DGND & AGND . . . . . . . . . . . . . . . . . –0.3 V, +7 V
Logic Inputs and Output to DGND . . . .–0.3 V, VDD + 0.3 V
VOUT to AGND . . . . . . . . . . . . . . . . . . .–0.3 V, VDD + 0.3 V
VREF to AGND . . . . . . . . . . . . . . . . . . .–0.3 V, VDD + 0.3 V
AGND to DGND . . . . . . . . . . . . . . . . . . . . . . . –0.3 V, VDD
IOUT Short Circuit to GND or VDD . . . . . . . . . . . . . . 50 mA
Package Power Dissipation . . . . . . . . . . . . .(TJ max–TA)/èJA
Thermal Resistance, èJA
14-Pin Plastic DIP Package (N-14) . . . . . . . . . . . 83°C/W
14-Lead SOIC Package (SO-14) . . . . . . . . . . . . 120°C/W
Maximum Junction Temperature (TJ max) . . . . . . . . 150°C
Operating Temperature Range . . . . . . . . . . . –40°C to +85°C
Storage Temperature Range . . . . . . . . . . . –65°C to +150°C
Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . +300°C
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