AD7305BR Analog Devices Inc, AD7305BR Datasheet - Page 17

• Manufacturer Part Number: AD7305BR
• Description: IC DAC 8BIT QUAD 5V R-R 20-SOIC
• Manufacturer: Analog Devices Inc

Specifications of AD7305BR

• Mounting Type: Surface Mount
• Rohs Status: RoHS non-compliant
• Settling Time: 1µs
• Number Of Bits: 8
• Data Interface: Parallel
• Number Of Converters: 4
• Voltage Supply Source: Dual ±
• Power Dissipation (max): 60mW
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-SOIC (7.5mm Width)
• Resolution (bits): 8bit
• No. Of Pins: 20
• Peak Reflow Compatible (260 C): No
• Update Rate: 1MSPS
• No. Of Bits: 8 Bit
• Leaded Process Compatible: No
• Interface Type: Parallel
• Converter Type: Digital to Analog
• Current, Output: ±3 mA (Typ.)
• Input Capacitance: 8 pF (Max.)
• Number Of Converter: 4
• Number Of Pins: 20
• Package Type: SOIC
• Power Dissipation: 15 mW (Max.)
• Resolution: 8 Bits
• Slew Rate: 1⁄2.7 V⁄uS
• Temperature, Operating, Maximum: 85 °C
• Temperature, Operating, Minimum: -40 °C
• Thermal Resistance, Junction To Ambient: 74 °C⁄W
• Voltage, Input, High Level: 2.1 V (Max.)
• Voltage, Input, Low Level: 0.6 V (Min.)
• Voltage, Range: 2.7 to 5.5 V
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

APPLICATIONS
The AD7304/AD7305 are inherently 2-quadrant multiplying
DACs. That is, they can easily be set up for unipolar output
operation. The full-scale output polarity is the same as the
reference input voltage polarity.
In some applications, it may be necessary to generate the full
4-quadrant multiplying capability or a bipolar output swing.
This is easily accomplished using an external true rail-to-rail op
amp, such as the OP295. Connecting the external amplifier with
two equal value resistors, as shown in Figure 38, results in a full
4-quadrant multiplying circuit. In this circuit, the amplifier
provides a gain of two, which increases the output span
magnitude to 10 V. The transfer equation of this circuit shows
that both negative and positive output voltages are created as
Rev. C | Page 17 of 20
the input data (D) is incremented from code zero (V
to midscale (V
V
OUT
Figure 38. 4-Quadrant Multiplying Application Circuit
REF
=
+5V
128
OUT
AD7304
D
−
10kΩ
= 0 V) to full scale (V
1
×
V
REF
10kΩ
2.2pF
–5V < V
AD7304/AD7305
OUT
= +5 V).
OUT
< +5V
OUT
= –5 V)
(2)