AD7945 Analog Devices, AD7945 Datasheet - Page 12

• Manufacturer Part Number: AD7945
• Description: +3.3 V/+5 V Multiplying 12-Bit DAC With a Parallel Interface
• Manufacturer: Analog Devices

Specifications of AD7945

• Resolution (bits): 12bit
• Dac Update Rate: 1.7MSPS
• Dac Settling Time: 600ns
• Max Pos Supply (v): +5.5V
• Single-supply: Yes
• Dac Type: Current Out
• Dac Input Format: Par

AD7943/AD7945/AD7948
Figure 10. Total Harmonic Distortion vs. Frequency
–0.50
–1.00
–100
1.00
0.50
0.00
–50
–55
–60
–65
–70
–75
–80
–85
–90
–95
Figure 9. All Codes Linearity in Biased Mode
(V
100
0
DD
V
V
V
OP AMP = AD820
T
= +3.3 V)
DD
REF
BIAS
A
= +25 C
= +3.3V
= 0V
= 1.23V
1024
1k
FREQUERCY – Hz
INPUT CODE
2048
10k
V
T
V
OP AMP = AD711
A
DD
IN
3072
= +25 C
= 6V rms
= +5V
4095
100k
–12–
–100
Figure 12. Multiplying Frequency Response vs.
Digital Code
–10
–20
–30
–40
–50
–60
–70
–80
–90
Figure 11. Digital-to-Analog Glitch Impulse
0
1k
V
T
V
OP AMP = AD711
A
DD
IN
100
0%
90
= +25 C
10
= 20V p-p
= +5V
50mV
10k
5V
DAC LOADED WITH ALL 0
AD711 OUTPUT
FREQUENCY – Hz
100k
DAC LOADED WITH ALL 1
V
T
V
OP AMP = AD711
DD
A
REF
= +25 C
= +5V
= 0V
200ns
200ns
1M
S
S
10M
REV. B