AD5449 Analog Devices, AD5449 Datasheet - Page 12

• Manufacturer Part Number: AD5449
• Description: Dual 12-Bit, High Bandwidth Multiplying DAC with Serial Interface
• Manufacturer: Analog Devices

Specifications of AD5449

• Resolution (bits): 12bit
• Dac Update Rate: 2.47MSPS
• Dac Settling Time: 80ns
• Max Pos Supply (v): +5.5V
• Single-supply: Yes
• Dac Type: Current Out
• Dac Input Format: Ser,SPI

AD5429/AD5439/AD5449
–60
–65
–70
–75
–80
–85
–90
100
–100
–120
80
60
40
20
–20
–40
–60
–80
0
20
0
1
0
1
T
V
V
Figure 25. Power Supply Rejection Ratio vs. Frequency
MCLK = 1MHz
MCLK = 200kHz
A
DD
REF
T
V
AMP = AD8038
A
DD
= 25°C
20
= 3V
= 25°C
Figure 27. Wideband SFDR vs. f
= 3.5V p-p
= 3V
10
10
Figure 26. THD + Noise vs. Frequency
40
60
100
100
FREQUENCY (Hz)
80
FREQUENCY (Hz)
f
MCLK = 0.5MHz
FULL SCALE
OUT
1k
100
1k
(kHz)
10k
120
ZERO SCALE
10k
OUT
140
100k
Frequency
T
V
AMP = AD8038
A
REF
160
100k
= 25°C
= 3.5V
1M
180
200
1M
10M
Rev. D | Page 12 of 28
–100
90
80
70
60
50
40
30
20
10
–10
–20
–30
–40
–50
–60
–70
–80
–90
–10
–20
–30
–40
–50
–60
–70
–80
–90
0
0
0
0
Figure 29. Wideband SFDR, f
Figure 30. Wideband SFDR, f
0
0
MCLK = 25MHz
100
0.5
Figure 28. Wideband SFDR vs. f
MCLK = 5MHz
200
2
1.0
300
1.5
MCLK = 10MHz
4
FREQUENCY (MHz)
FREQUENCY (MHz)
400
2.0
f
OUT
500
OUT
OUT
(kHz)
2.5
6
= 100 kHz, Clock = 25 MHz
= 500 kHz, Clock = 10 MHz
600
3.0
OUT
700
8
3.5
Frequency
T
V
AMP = AD8038
A
800
T
V
AMP = AD8038
65k CODES
T
V
AMP = AD8038
65k CODES
REF
A
DD
A
DD
4.0
= 25°C

= 25°C
= 25°C
= 3.5V
10
= 5V
= 5V
900 1000
4.5
5.0
12