AD9779ABSVZ Analog Devices Inc, AD9779ABSVZ Datasheet - Page 32

• Manufacturer Part Number: AD9779ABSVZ
• Description: IC DAC 16BIT 1.0GSPS 100TQFP
• Manufacturer: Analog Devices Inc

Specifications of AD9779ABSVZ

• Data Interface: Serial
• Design Resources: Interfacing ADL5370 to AD9779A Dual-Channel, 1 GSPS High Speed DAC (CN0016) Interfacing ADL5371 to AD9779A Dual-Channel, 1 GSPS High Speed DAC (CN0017) Interfacing ADL5372 to AD9779A Dual-Channel, 1 GSPS High Speed DAC (CN0018) Interfacing ADL5373 to AD9779A Dual-Channel, 1 GSPS High Speed DAC (CN0019) Interfacing ADL5374 to AD9779A Dual-Channel, 1 GSPS High Speed DAC (CN0020) Interfacing ADL5375 to AD9779A Dual-Channel, 1 GSPS High Speed DAC (CN0021)
• Number Of Bits: 16
• Number Of Converters: 2
• Voltage Supply Source: Analog and Digital
• Power Dissipation (max): 300mW
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 100-TQFP Exposed Pad, 100-eTQFP, 100-HTQFP, 100-VQFP
• Resolution (bits): 16bit
• Sampling Rate: 1GSPS
• Input Channel Type: Parallel
• Digital Ic Case Style: QFP
• No. Of Pins: 100
• Operating Temperature Range: -40°C To +85°C
• Number Of Channels: 2
• Resolution: 16b
• Interface Type: Parallel
• Single Supply Voltage (typ): 3.3V
• Dual Supply Voltage (typ): Not RequiredV
• Architecture: Interpolation Filter
• Power Supply Requirement: Analog and Digital
• Output Type: Current
• Single Supply Voltage (min): 3.13V
• Single Supply Voltage (max): 3.47V
• 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: 100
• Package Type: TQFP EP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: AD9779A-EBZ - BOARD EVALUATION FOR AD9779A
• Settling Time: -
• Lead Free Status / Rohs Status: Compliant

AD9776A/AD9778A/AD9779A
With the interpolation filter and modulator combined, the
incoming signal can be placed anywhere within the Nyquist
region of the DAC output sample rate. When the input signal
is complex, this architecture allows modulation of the input
signal to positive or negative Nyquist regions (see Table 19).
The Nyquist regions of up to 4× the input data rate can be seen
in Figure 60.
Figure 57, Figure 58, and Figure 59 show the low-pass response
of the digital filters with no modulation. By turning on the modu-
lation feature, the response of the digital filters can be tuned to
anywhere within the DAC bandwidth. As an example, Figure 61
to Figure 67 show the nonshifted mode filter responses (refer to
Table 19 for shifted/nonshifted mode filter responses).
Figure 58. 4× Interpolation, Low-Pass Response to ±4× Input Data Rate
Figure 59. 8× Interpolation, Low-Pass Response to ±4× Input Data Rate
–100
–100
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–50
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–70
–80
–90
–10
–20
–30
–40
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–60
–70
–80
–90
–4×
10
10
0
0
–8
–4
–4
–7
–3×
–6
–3
–3
(Dotted Lines Indicate 1 dB Roll-Off)
(Dotted Lines Indicate 1 dB Roll-Off)
–5
–2×
–4
–2
–2
Figure 60. Nyquist Zones
–3
–1×
f
f
OUT
OUT
–2
–1
–1
–1
(× Input Data Rate)
(× Input Data Rate)
DC
1
0
0
2
1×
3
1
1
4
2×
5
2
2
6
3×
7
8
3
3
4×
4
4
Rev. A | Page 32 of 60
Figure 62. Interpolation/Modulation Combination of −3f
Figure 63. Interpolation/Modulation Combination of −2f
Figure 61. Interpolation/Modulation Combination of 4f
–100
–100
–100
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–90
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–90
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–60
–70
–80
–90
10
10
10
0
0
0
–4
–4
–4
–3
–3
–3
–2
–2
–2
f
f
f
OUT
OUT
OUT
–1
–1
–1
(× Input Data Rate)
(× Input Data Rate)
(× Input Data Rate)
0
0
0
1
1
1
2
2
2
DAC
3
3
DAC
3
DAC
/8 Filter
/8 Filter
/8 Filter
4
4
4