AD9705-DPG2-EBZ(RevD) View Datasheet(PDF) - Analog Devices
Part Name
Description
Manufacturer
AD9705-DPG2-EBZ
(Rev.:RevD)
(Rev.:RevD)
Analog Devices
AD9705-DPG2-EBZ Datasheet PDF : 42 Pages
| |||
Data Sheet
POWER DISSIPATION
The power dissipation, PD, of the AD9704/AD9705/AD9706/
AD9707 is dependent on several factors that include
• The power supply voltages (AVDD, CLKVDD, and DVDD)
• The full-scale current output, IOUTFS
• The update rate, fCLOCK
• The reconstructed digital input waveform
Power dissipation is directly proportional to the analog supply
current, IAVDD, and the digital supply current, IDVDD. IAVDD is equal to
a fixed current plus IOUTFS, as shown in Figure 80. IDVDD is proportional
to fCLOCK and increases with increasing analog output frequencies.
Figure 82 shows IDVDD as a function of full-scale sine wave output
ratios (fOUT/fCLOCK) for various update rates with DVDD = 3.3 V.
ICLKVDD is directly proportional to fCLOCK and is higher for differential
clock operation than for single-ended operation, as shown in
Figure 84. This difference in clock current is due primarily to the
differential clock receiver, which is disabled in single-ended
clock mode.
10
9
8
7
6
5
4
3
2
1
0
1
2
3
4
5
IOUTFS (mA)
Figure 80. IAVDD vs. IOUTFS at AVDD = 3.3 V
6
5
4
3
2
1
0
1.00
1.25
1.50
IOUTFS (mA)
1.75
2.00
Figure 81. IAVDD vs. IOUTFS at AVDD = 1.8 V
AD9704/AD9705/AD9706/AD9707
10
9
fCLOCK = 175MSPS
8
7
6
fCLOCK = 125MSPS
5
4
fCLOCK = 75MSPS
3
fCLOCK = 25MSPS
2
1
0
0.01
fCLOCK = 10MSPS
0.1
1
fOUT/fCLOCK
Figure 82. IDVDD vs. fOUT/fCLOCK Ratio at DVDD = 3.3 V
2.5
2.0
fCLOCK = 80MSPS
1.5
fCLOCK = 50MSPS
1.0
fCLOCK = 25MSPS
0.5
fCLOCK = 10MSPS
0
0.01
0.1
1
fOUT/fCLOCK
Figure 83. IDVDD vs. fOUT/fCLOCK Ratio at DVDD = 1.8 V
5
4
DIFF
3
SE
2
1
0
0
50
100
150
200
fCLOCK (MSPS)
Figure 84. ICLKVDD vs. fCLOCK at CLKVDD = 3.3 V
Rev. D | Page 37 of 42
Share Link: 