參數(shù)資料
型號(hào)： AD9957
廠商： Analog Devices, Inc.
英文描述： 1 GSPS Quadrature Digital Upconverter with 18-Bit IQ Data Path and 14-Bit DAC
中文描述： 1 GSPS的正交數(shù)字上變頻器與18位智商數(shù)據(jù)路徑和14位DAC
文件頁(yè)數(shù)： 43/60頁(yè)
文件大?。?/td> 840K
代理商： AD9957
AD9957
I/O_UPDATE—Input/Output Update
The I/O_UPDATE initiates the transfer of written data from
the I/O port buffer to active registers. I/O_UPDATE is active
on the rising edge and its pulse width must be greater than one
SYNC_CLK period. It is either an input or output pin depending
on the programming of the internal I/O update active bit.
Rev. 0 | Page 43 of 60
SERIAL I/O TIMING DIAGRAMS
The diagrams below provide basic examples of the timing
relationships between the various control signals of the serial
I/O port. Most of the bits in the register map are not transferred
to their internal destinations until assertion of an I/O update,
which is not included in the timing diagrams that follow.
MSB/LSB TRANSFERS
The AD9957 serial port can support both most significant bit
(MSB) first or least significant bit (LSB) first data formats. This
functionality is controlled by Bit 0 in Control Function
Register 1 (0x00). The default format is MSB first. If Bit 0 is set
high, the serial port is configured for LSB-first format. If LSB
first is active, all data, including the instruction byte, must
follow LSB-first convention. Note that the highest number
found in the bit range column for each register (see the Register
Map and Bit Descriptions section and Table 13) is the MSB and
the lowest number is the LSB for that register.
0
I
7
SDIO
INSTRUCTION CYCLE
DATA TRANSFER CYCLE
SCLK
CS
I
6
I
5
I
4
I
3
I
2
I
1
I
0
D
7
D
6
D
5
D
4
D
3
D
2
D
1
D
0
Figure 59. Serial Port Write Timing—Clock Stall Low
0
D
O7
INSTRUCTION CYCLE
DATA TRANSFER CYCLE
DON'T CARE
I
7
I
6
I
5
I
4
I
3
I
2
I
1
I
0
SDIO
SCLK
CS
SDO
D
O6
D
O5
D
O4
D
O3
D
O2
D
O1
D
O0
Figure 60. 3-Wire Serial Port Read Timing—Clock Stall Low
0
I
7
SDIO
INSTRUCTION CYCLE
DATA TRANSFER CYCLE
SCLK
CS
I
6
I
5
I
4
I
3
I
2
I
1
I
0
D
7
D
6
D
5
D
4
D
3
D
2
D
1
D
0
Figure 61. Serial Port Write Timing—Clock Stall High
0
I
7
SDIO
INSTRUCTION CYCLE
DATA TRANSFER CYCLE
SCLK
CS
I
6
I
5
I
4
I
3
I
2
I
1
I
0
D
O7
D
O6
D
O5
D
O4
D
O3
D
O2
D
O1
D
O0
Figure 62. 2-Wire Serial Port Read Timing—Clock Stall High
相關(guān)PDF資料
PDF描述
AD9957BSVZ 1 GSPS Quadrature Digital Upconverter with 18-Bit IQ Data Path and 14-Bit DAC
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AD9957/PCBZ 功能描述:BOARD EVAL AD9957 QUADRATURE MOD RoHS:是 類別:編程器，開(kāi)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
AD9957_07 制造商:AD 制造商全稱:Analog Devices 功能描述:1 GSPS Quadrature Digital Upconverter with 18-Bit IQ Data Path and 14-Bit DAC
AD9957BCPZ 制造商:Analog Devices 功能描述:GSPS QUADRATURE DIGITAL UPCONVERTER W/18-BIT IQ DATA PATH - Trays
AD9957BSVZ 功能描述:IC DDS 1GSPS 14BIT IQ 100TQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 直接數(shù)字合成 (DDS) 系列:- 產(chǎn)品變化通告:Product Discontinuance 27/Oct/2011 標(biāo)準(zhǔn)包裝:2,500 系列:- 分辨率（位）:10 b 主 fclk:25MHz 調(diào)節(jié)字寬（位）:32 b 電源電壓:2.97 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:帶卷 (TR)
AD9957BSVZ-REEL 功能描述:IC DDS 1GSPS 14BIT IQ 100TQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 直接數(shù)字合成 (DDS) 系列:- 產(chǎn)品變化通告:Product Discontinuance 27/Oct/2011 標(biāo)準(zhǔn)包裝:2,500 系列:- 分辨率（位）:10 b 主 fclk:25MHz 調(diào)節(jié)字寬（位）:32 b 電源電壓:2.97 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:帶卷 (TR)
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