AD7628 Analog Devices, AD7628 Datasheet - Page 5

• Manufacturer Part Number: AD7628
• Description: CMOS Dual 8-Bit Buffered Multiplying DAC
• Manufacturer: Analog Devices

Specifications of AD7628

• Resolution (bits): 8bit
• Dac Update Rate: 2.9MSPS
• Dac Settling Time: 350ns
• Max Pos Supply (v): +15.75V
• Single-supply: Yes
• Dac Type: Current Out
• Dac Input Format: Par

DAC Latch Contents
MSB
1 1 1 1 1 1 1 1
1 0 0 0 0 0 0 1
1 0 0 0 0 0 0 0
0 1 1 1 1 1 1 1
0 0 0 0 0 0 0 1
0 0 0 0 0 0 0 0
NOTE: 1 LSB = (2
REV. A
LSB
Table I. Unipolar Binary Code Table
–8
)(V
Figure 4. Dual DAC Unipolar Binary Operation (2 Quadrant Multiplication). See Table I.
IN
) =
Figure 5. Dual DAC Bipolar Operation (4 Quadrant Multiplication). See Table II.
256
1
V
IN
Analog Output
(DAC A or DAC B)
–V
–V
–V
–V
–V
–V
IN
IN
IN
IN
IN
IN
Table III. Recommended Trim Resistor Values
Trim
Resistor
R1; R3
R2; R4
256
129
256
128
256
127
256
256
256
255
0
1
0
–
V
2
IN
–5–
DAC Latch Contents
MSB
1 1 1 1 1 1 1 1
1 0 0 0 0 0 0 1
1 0 0 0 0 0 0 0
0 1 1 1 1 1 1 1
0 0 0 0 0 0 0 1
0 0 0 0 0 0 0 0
NOTE: 1 LSB = (2
K/B/T
500
150
LSB
Table II. Bipolar (Offset Binary) Code Table
–7
)(V
IN
) =
128
1
V
IN
Analog Output
(DAC A or DAC B)
–V
–V
–V
V
V
IN
IN
IN
IN
IN
0
127
128
128
128
127
128
128
128
1
1
AD7628