参数资料
| 型号： | AD9779BSVZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 33/56页 |
| 文件大小： | 0K |
| 描述： | IC DAC 16BIT DUAL 1GSPS 100TQFP |
| 产品培训模块： | Data Converter Fundamentals DAC Architectures |
| 标准包装： | 1 |
| 位数： | 16 |
| 数据接口： | 串行 |
| 转换器数目： | 2 |
| 电压电源： | 模拟和数字 |
| 功率耗散（最大）： | 300mW |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 100-TQFP 裸露焊盘 |
| 供应商设备封装： | 100-TQFP-EP（14x14） |
| 包装： | 托盘 |
| 输出数目和类型： | 4 电流，单极 |
| 采样率（每秒）： | 1G |
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AD9776/AD9778/AD9779
Rev. A | Page 39 of 56
voltage is 0 V to 1.6 V. When sinking current, the output
compliance voltage is 0.8 V to 1.6 V.
The auxiliary DACs can be used for local oscillator (LO) cancella-
tion when the DAC output is followed by a quadrature modulator.
This LO feedthrough is caused by the input referred dc offset
voltage of the quadrature modulator (and the DAC output offset
voltage mismatch) and can degrade system performance. Typical
DAC-to-quadrature modulator interfaces are shown in Figure 79
and Figure 80. Often, the input common-mode voltage for the
modulator is much higher than the output compliance range of
the DAC, so that ac coupling or a dc level shift is necessary. If the
required common-mode input voltage on the quadrature
modulator matches that of the DAC, then the dc blocking
capacitors in Figure 79 can be removed. A low-pass or band-pass
passive filter is recommended when spurious signals from the
DAC (distortion and DAC images) at the quadrature modulator
inputs can affect the system performance. Placing the filter at the
the filter, as the source and load impedances can easily be
designed close to 50 Ω.
05361-115
AD9779
Q DAC
AD9779
AUX
DAC2
25
Ω TO 50Ω
0.1
μF
0.1
μF
OPTIONAL
PASSIVE
FILTERING
QUADRATURE
MODULATOR V+
QUAD MOD
Q INPUTS
AD9779
I DAC
AD9779
AUX
DAC1
25
Ω TO 50Ω
0.1
μF
0.1
μF
OPTIONAL
PASSIVE
FILTERING
QUADRATURE
MODULATOR V+
QUAD MOD
I INPUTS
Figure 79. Typical Use of Auxiliary DACs AC Coupling to
Quadrature Modulator
05361-116
AD9779
I OR Q DAC
AD9779
AUX
DAC1 OR 2
25
Ω TO 50Ω
25
Ω TO 50Ω
OPTIONAL
PASSIVE
FILTERING
QUADRATURE
MODULATOR V+
QUAD MOD
I OR Q INPUTS
Figure 80. Typical Use of Auxiliary DACs DC Coupling to Quadrature
Modulator with DC Shift
POWER DISSIPATION
and 3.3 V digital and clock supplies in single DAC and dual
DAC modes. In addition to this, the power dissipation/current
of the 3.3 V supply (mode and speed independent) in single
DAC mode is 102 mW/31 mA. In dual DAC mode, this is
182 mW/5
5 mA. Furthermore, when the PLL is enabled, it adds
90 mW/50 mA to the 1.8 V clock supply regardless of the mode
of the AD9779.
0
250
fDATA (MSPS)
POW
ER
(
W
)
0.6
0.7
0.5
0.4
0.3
0.2
0.1
25
50
75
100
125
150
175
200
225
8
× INTERPOLATION,
ZERO STUFFING
8
× INTERPOLATION
4
× INTERPOLATION
4
× INTERPOLATION,
ZERO STUFFING
2
× INTERPOLATION
1
× INTERPOLATION
2
× INTERPOLATION,
ZERO STUFFING
1
× INTERPOLATION,
ZERO STUFFING
05361-076
Figure 81. Total Power Dissipation, I Data Only, Real Mode
0
250
fDATA (MSPS)
POW
ER
(
W
)
0.4
25
50
75
100
125
150
175
200
225
8
× INTERPOLATION
4
× INTERPOLATION
2
× INTERPOLATION
1
× INTERPOLATION
0.3
0.2
0.1
05361-078
Figure 82. Power Dissipation, Digital 1.8 V Supply, I Data Only, Real Mode,
Does Not Include Zero Stuffing
0
250
fDATA (MSPS)
POW
ER
(
W
)
0.08
25
50
75
100
125
150
175
200
225
8
× INTERPOLATION
4
× INTERPOLATION
2
× INTERPOLATION
1
× INTERPOLATION
0.06
0.04
0.02
05361-079
Figure 83. Power Dissipation, Clock 1.8 V Supply, I Data Only, Real Mode,
Includes Modulation Modes, Does Not Include Zero Stuffing
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD9779BSVZ1 | 制造商:AD 制造商全称:Analog Devices 功能描述:Dual 12-/14-/16-Bit, 1 GSPS, Digital-to-Analog Converters |
| AD9779BSVZRL | 功能描述:IC DAC 16BIT DUAL 1GSPS 100TQFP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 数模转换器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1,000 系列:- 设置时间:1µs 位数:8 数据接口:串行 转换器数目:8 电压电源:双 ± 功率耗散（最大）:941mW 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:24-SOIC（0.295"，7.50mm 宽） 供应商设备封装:24-SOIC W 包装:带卷 (TR) 输出数目和类型:8 电压，单极 采样率（每秒）:* |
| AD9779BSVZRL1 | 制造商:AD 制造商全称:Analog Devices 功能描述:Dual 12-/14-/16-Bit, 1 GSPS, Digital-to-Analog Converters |
| AD9779-EB | 制造商:Analog Devices 功能描述:EVAL BOARD 16 BIT DUAL INTERPOLATION DAC - Bulk |
| AD9779-EBZ | 制造商:Analog Devices 功能描述:DUAL 16B, 1.0 GSPS TXDAC - Bulk |
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