AD7303 Analog Devices, AD7303 Datasheet - Page 4

• Manufacturer Part Number: AD7303
• Description: +2.7 V to +5.5 V, Serial Input, Dual Voltage Output 8-Bit DAC
• Manufacturer: Analog Devices

Specifications of AD7303

• Resolution (bits): 8bit
• Dac Update Rate: 833kSPS
• Dac Settling Time: 1.2µs
• Max Pos Supply (v): +5.5V
• Single-supply: Yes
• Dac Type: Voltage Out
• Dac Input Format: Ser,SPI

AD7303
ABSOLUTE MAXIMUM RATINGS*
(T
V
Reference Input Voltage to GND . . . . –0.3 V to V
Digital Input Voltage to GND . . . . . . . –0.3 V to V
V
Operating Temperature Range
Storage Temperature Range . . . . . . . . . . . . –65 C to +150 C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . +150 C
Plastic DIP Package, Power Dissipation . . . . . . . . . . 800 mW
Pin
No.
1
2
3
4
5
6
7
8
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection.
Although the AD7303 features proprietary ESD protection circuitry, permanent damage may
occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD
precautions are recommended to avoid performance degradation or loss of functionality.
DD
OUT
A
Commercial (B Version) . . . . . . . . . . . . . –40 C to +105 C
Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . +260 C
= +25 C unless otherwise noted)
JA
to GND . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +7 V
A, V
Thermal Impedance . . . . . . . . . . . . . . . . . . . . . 117 C/W
Mnemonic
V
V
GND
REF
SCLK
DIN
SYNC
V
OUT
DD
OUT
OUT
A
B
B to GND . . . . . . . . . . . –0.3 V to V
Function
Analog Output Voltage from DAC A. The output amplifier swings rail to rail on its output.
Power Supply Input. These parts can be operated from +2.7 V to +5.5 V and should be decoupled to GND.
Ground reference point for all circuitry on the part.
External Reference Input. This can be used as the reference for both DACs, and is selected by setting the
INT/EXT bit in the control register to a logic one. The range on this reference input is 1 V to V
the internal reference is selected, this voltage will appear as an output for decoupling purposes at the REF Pin.
When using the internal reference, external voltages should not be connected to the REF Pin, see Figure 21.
Serial Clock. Logic Input. Data is clocked into the input shift register on the rising edge of the serial clock
input. Data can be transferred at rates up to 30 MHz.
Serial Data Input. This device has a 16-bit shift register, 8 bits for data and 8 bits for control. Data is clocked
into the register on the rising edge of the clock input.
Level Triggered Control Input (active low). This is the frame synchronization signal for the input data. When
SYNC goes low, it enables the input shift register and data is transferred in on the rising edges of the following
clocks. The rising edge of the SYNC causes the relevant registers to be updated.
Analog output voltage from DAC B. The output amplifier swings rail to rail on its output.
PIN FUNCTION DESCRIPTIONS
(DIP, SOIC and microSOIC)
DD
DD
DD
PIN CONFIGURATIONS
V
OUT
GND
REF
V
+ 0.3 V
+ 0.3 V
+ 0.3 V
DD
A
1
2
3
4
(Not to Scale)
AD7303
TOP VIEW
–4–
SOIC Package, Power Dissipation . . . . . . . . . . . . . . . 450 mW
MicroSOIC Package, Power Dissipation . . . . . . . . . . 450 mW
*Stresses above those listed under “Absolute Maximum Ratings” may cause
permanent damage to the device. This is a stress rating only; functional operation
of the device at these or any other conditions above those listed in the operational
sections of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.
Lead Temperature, Soldering
Lead Temperature, Soldering
JA
JA
8
7
6
5
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . +215 C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . +220 C
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . +215 C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . +220 C
Thermal Impedance . . . . . . . . . . . . . . . . . . . . . 157 C/W
Thermal Impedance . . . . . . . . . . . . . . . . . . . . . 206 C/W
V
SYNC
DIN
SCLK
OUT
B
WARNING!
ESD SENSITIVE DEVICE
DD
/2. When
REV. 0