AD9775BSVZ Analog Devices Inc, AD9775BSVZ Datasheet - Page 35

IC,D/A CONVERTER,DUAL,14-BIT,CMOS,TQFP,80PIN

AD9775BSVZ

Manufacturer Part Number
AD9775BSVZ
Description
IC,D/A CONVERTER,DUAL,14-BIT,CMOS,TQFP,80PIN
Manufacturer
Analog Devices Inc
Series
TxDAC+®r
Datasheet

Specifications of AD9775BSVZ

Settling Time
11ns
Number Of Bits
14
Data Interface
Parallel
Number Of Converters
2
Voltage Supply Source
Analog and Digital
Power Dissipation (max)
410mW
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
80-TQFP Exposed Pad, 80-eTQFP, 80-HTQFP, 80-VQFP
Number Of Channels
2
Resolution
14b
Interface Type
Parallel
Single Supply Voltage (typ)
3.3V
Dual Supply Voltage (typ)
Not RequiredV
Architecture
R-2R
Power Supply Requirement
Analog and Digital
Output Type
Current
Single Supply Voltage (min)
3.1V
Single Supply Voltage (max)
3.5V
Dual Supply Voltage (min)
Not RequiredV
Dual Supply Voltage (max)
Not RequiredV
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
80
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
AD9775-EBZ - BOARD EVALUATION FOR AD9775
Lead Free Status / Rohs Status
Compliant

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Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AD9775BSVZ
Manufacturer:
Analog Devices Inc
Quantity:
135
Part Number:
AD9775BSVZ
Manufacturer:
Analog Devices Inc
Quantity:
10 000
Part Number:
AD9775BSVZ
Manufacturer:
ADI/亚德诺
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Part Number:
AD9775BSVZRL
Manufacturer:
Analog Devices Inc
Quantity:
10 000
MODULATION, INTERPOLATION = 8×
With Control Register 0x01, Bit 7 and Bit 6 set to 11, the
interpolation rate of the AD9775 is 8×. Modulation is achieved
by multiplying successive samples at the interpolation filter
output by the sequence (0, +0.707, +1, +0.707, 0, −0.707, −1,
+0.707). Figure 71 through Figure 74 represent the spectral
response of the AD9775 DAC output with 8× interpolation in the
various modulation modes to a narrow-band baseband signal.
The Effects of the Digital Modulation on the DAC Output Spectrum, Interpolation = 8×
–100
–100
–20
–40
–60
–80
–20
–40
–60
–80
0
0
0
0
Figure 71. 8× Interpolation, Modulation Disabled
Figure 72. 8× Interpolation, Modulation = f
1
1
f
f
OUT
OUT
2
2
f
f
DATA
DATA
)
)
3
3
DAC
/2
4
4
Rev. E | Page 35 of 56
Looking at Figure 63 through Figure 74, the user can see how
higher interpolation rates reduce the complexity of the recon-
struction filter needed at the DAC output. It also becomes
apparent that the ability to modulate by f
degree of flexibility in frequency planning.
–100
–100
–20
–40
–60
–80
–20
–40
–60
–80
0
0
0
0
Figure 73. 8× Interpolation, Modulation = f
Figure 74. 8× Interpolation, Modulation = f
1
1
2
2
3
3
f
f
OUT
OUT
4
4
f
f
DATA
DATA
)
)
5
5
S
/2, f
6
6
S
/4, or f
DAC
DAC
7
7
/4
/8
AD9775
S
/8 adds a
8
8

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