AD7533 Analog Devices, AD7533 Datasheet - Page 8

• Manufacturer Part Number: AD7533
• Description: CMOS Low Cost, 10-Bit Multiplying DAC
• Manufacturer: Analog Devices

Specifications of AD7533

• Resolution (bits): 10bit
• Dac Update Rate: 1.7MSPS
• Dac Settling Time: 600ns
• Max Pos Supply (v): +16.5V
• Single-supply: Yes
• Dac Type: Current Out
• Dac Input Format: Par

AD7533
OPERATION
UNIPOLAR BINARY CODE
Table 4. Unipolar Binary Operation
(2-Quadrant Multiplication)
MSB
1 1 1 1 1 1 1 1 1 1
1 0 0 0 0 0 0 0 0 1
1 0 0 0 0 0 0 0 0 0
0 1 1 1 1 1 1 1 1 1
0 0 0 0 0 0 0 0 0 1
0 0 0 0 0 0 0 0 0 0
Nominal LSB magnitude for the circuit of Figure 11 is given by
UNIPOLAR
DIGITAL
NOTES
1. R1 AND R2 USED ONLY IF GAIN ADJUSTMENT IS REQUIRED.
2. C1 PHASE COMPENSATION (5pF TO 15pF) MAY BE REQUIRED
INPUT
Digital Input
Figure 11. Unipolar Binary Operation (2-Quadrant Multiplication)
WHEN USING HIGH SPEED AMPLIFIER.
LSB
=
MSB
LSB
V
REF
ANALOG INPUT
LSB
1kΩ
13
4
BIPOLAR
R1
⎛
⎜
⎝
±10V
1024
15
1
AD7533
V
GND
REF
3
⎞
⎟
⎠
−
−
−
−
−
−
V
14
DD
V
V
V
V
V
V
REF
REF
REF
REF
REF
REF
(V
16
⎛
⎜
⎝
⎛
⎜
⎝
⎛
⎜
⎝
⎛
⎜
⎝
⎛
⎜
⎝
⎛
⎜
⎝
OUT
1024
1023
1024
1024
1024
1024
1024
R
513
512
511
FB
1
2
0
1
as shown in Figure 11)
I
I
Analog Output
OUT
OUT
⎞
⎟
⎠
⎞
⎟
⎠
⎞
⎟
⎠
⎞
⎟
⎠
⎞
⎟
⎠
⎞
⎟
⎠
330Ω
R2
1
2
=
=
⎛
⎜
⎝
0
V
REF
2
C1
⎞
⎟
⎠
V
OUT
Rev. C | Page 8 of 12
BIPOLAR (OFFSET BINARY) CODE
Table 5. Unipolar Binary Operation
(4-Quadrant Multiplication)
MSB
1 1 1 1 1 1 1 1 1 1
1 0 0 0 0 0 0 0 0 1
1 0 0 0 0 0 0 0 0 0
0 1 1 1 1 1 1 1 1 1
0 0 0 0 0 0 0 0 0 1
0 0 0 0 0 0 0 0 0 0
Nominal LSB magnitude for the circuit of Figure 12 is given by
NOTES
1. R3, R4, AND R5 SELECTED FOR MATCHING AND TRACKING.
2. R1 AND R2 USED ONLY IF GAIN ADJUSTMENT IS REQUIRED.
3. C1 PHASE COMPENSATION (5pF TO 15pF) MAY BE REQUIRED
BIPOLAR
DIGITAL
WHEN USING HIGH SPEED AMPLIFIERS.
INPUT
Digital Input
LSB
Figure 12. Bipolar Operation (4-Quadrant Multiplication)
MSB
LSB
=
1kΩ
V
13
4
R1
LSB
REF
ANALOG INPUT
±10V
15
BIPOLAR
⎛
⎜
⎝
AD7533
V
GND
REF
512
3
1
V
14
DD
⎞
⎟
⎠
16
0
+
+
−
−
−
1
2
V
V
V
V
V
I
I
330Ω
REF
REF
REF
REF
REF
OUT
OUT
R2
(V
1
2
⎛
⎜
⎝
⎛
⎜
⎝
⎛
⎜
⎝
⎛
⎜
⎝
⎛
⎜
⎝
OUT
512
512
512
512
512
512
511
511
1
1
C1
as shown in Figure 12)
Analog Output
⎞
⎟
⎠
⎞
⎟
⎠
⎞
⎟
⎠
⎞
⎟
⎠
⎞
⎟
⎠
A1
10kΩ
20kΩ
R3
5kΩ
R6
R4
20kΩ
A2
R5
V
OUT