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| 型號(hào)： | AD9957BSVZ-REEL |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 通信及網(wǎng)絡(luò) |
| 英文描述： | 1 GSPS Quadrature Digital Upconverter with 18-Bit IQ Data Path and 14-Bit DAC |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, PQFP100 |
| 封裝： | ROHS COMPLIANT, MS-026AED-HD, TQFP-100 |
| 文件頁(yè)數(shù)： | 16/60頁(yè) |
| 文件大小： | 840K |
| 代理商： | AD9957BSVZ-REEL |
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AD9957
QUADRATURE MODULATION MODE
A block diagram of the AD9957 operating in QDUC mode is
shown in Figure 26; grayed items are inactive. The parallel input
accepts 18-bit I- and Q-words in time-interleaved fashion. That
is, an 18-bit I-word is followed by an 18-bit Q-word, then the
next 18-bit I-word, and so on. One 18-bit I-word and one 18-bit
Q-word together comprise one internal sample. The data
assembler and formatter de-interleave the I- and Q-words so
that each sample propagates along the internal data pathway in
parallel fashion. Both I and Q data paths are active; the parallel
data clock (PDCLK) serves to synchronize the input of I/Q data
to the AD9957.
Rev. 0 | Page 16 of 60
The PROFILE and I/O_UPDATE pins are also synchronous to
the PDCLK.
The DDS core provides a quadrature (sine and cosine) local
oscillator signal to the quadrature modulator, where the
interpolated I and Q samples are multiplied by the respective
phase of the carrier and summed together, producing a
quadrature modulated data stream. This data stream is routed
through the inverse sinc filter (optionally), and the output
scaling multiplier. Then it is applied to the 14-bit DAC to
produce the quadrature modulated analog output signal.
0
PDCLK
I/Q IN
E
DAC_RSET
IOUT
IOUT
TxENABLE
DAC GAIN
OUTPUT
SCALE
FACTOR
θ
cos (
ω
t+
θ
)
I
S
F
CLOCK
F
P
8
SYSCLK
PLL
÷2
C
REF_CLK
REF_CLK
REFCLK_OUT
XTAL_SEL
AD9957
ω
sin (
ω
t+
θ
)
S
S
P
P
M
2
2
O
DDS
AUX
DAC
8-BIT
POWER
DOWN
CONTROL
18
D
I
Q
IS
QS
B
18
18
16
16
I
C
I
C
OSK
INTERNAL CLOCK TIMING AND CONTROL
DAC
14-BIT
C
FTW
PW
PARALLEL DATA
TIMING AND CONTROL
2
R
RAM
P
C
I
S
S
SERIAL I/O
PORT
I
PROGRAMMING
REGISTERS
3
I Q
IS QS
H
F
C
(
H
F
C
(
Figure 26. Quadrature Modulation Mode
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD9957BSVZREEL13 | 制造商:AD 制造商全稱:Analog Devices 功能描述:1 GSPS Quadrature Digital Upconverter w/18-Bit IQ Data Path and 14-Bit DAC |
| AD9958 | 制造商:AD 制造商全稱:Analog Devices 功能描述:2-Channel 500 MSPS DDS with 10-Bit DACs |
| AD9958 PCB | 制造商:Analog Devices 功能描述:EVAL BOARD ((NS)) |
| AD9958/PCB | 制造商:Analog Devices 功能描述:Evaluation Board For 2-Channel 500 MSPS DDS With 10-Bit DACs 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Analog Devices 功能描述:IC 10-BIT DAC DDS |
| AD9958/PCBZ | 功能描述:BOARD EVALUATION FOR AD9958 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評(píng)估演示板和套件 系列:AgileRF™ 標(biāo)準(zhǔn)包裝:1 系列:PSoC® 主要目的:電源管理，熱管理 嵌入式:- 已用 IC / 零件:- 主要屬性:- 次要屬性:- 已供物品:板，CD，電源 |
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