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參數資料
| 型號： | AD9912 |
| 廠商： | Analog Devices, Inc. |
| 元件分類： | XO, clock |
| 英文描述： | 1 GSPS Direct Digital Synthesizer w/ 14-bit DAC |
| 中文描述： | 1 GSPS的直接數字頻率合成瓦特/ 14位DAC |
| 文件頁數： | 3/3頁 |
| 文件大小： | 120K |
| 代理商： | AD9912 |
Preliminary Technical Data
AD9912
Rev. Pr
B
| Page 3 of 3
PR06763-0-
6
/07(Pr
B
)
12, 13,
15-18, 20,
21, 22, 44
14, 37, 46,
47, 49
27
28
31
N/C
No Connect
No Connect: These excess, unused pins should be left floating.
I
Power
AVDD3
Analog Supply: Connect to a nominal 3.3V supply
I
I
SYSCLK
SYSCLKB
LOOP_FILTER
System Clock Input. Can be LVPECL or Crystal input, depending on CLKMODESEL pin.
Complementary System Clock: Complementary signal to the input provided on pin 27
System Clock Multiplier Loop Filter: When using the frequency multiplier to drive the
System Clock, an external loop filter must be constructed and attached to this pin.
Clock Mode Select. Set to GND when using a crystal. Pull up to 1.8V when using either an
oscillator or external clock source. (See the
SysClk Inputs
section for details on the use of
this pin).
Analog Ground: Connect to Ground. NOTE: Pin 43 is a ground shield connection.
32
I
1.8V
CMOS
CLKMODESEL
33, 39, 43,
52
34
I
GND
AVSS
O
1.8V
HSTL
1.8V
HSTL
3.3V
CMOS
OUTB
Complementary HSTL Output: See spec table and the OUTPUT DRIVERS AND
MULTIPLIER section, under sub heading Primary (Differential) Driver, for details
HSTL Output: See specification table and the CLOCK DRIVERS section
35
O
OUT
38
O
OUT_CMOS
CMOS Output: See specification table and the CLOCK DRIVERS section
40
I
FDBK_INB
Complementary Feedback input: In standard operating mode, this pin is connected to
the filtered IOUTB output . This internally biased input is typically AC-coupled, and when
configured as such, can accept any differential signal.
Feedback Input: In standard operating mode, this pin is connected to the filtered IOUT
output
DAC output current setting resistor. Connect a resistor from this pin to GND . See the
“
DAC Output”
section.
DAC output: Output signal should be filtered and sent back on chip through FDBK_INB
input
Complimentary DAC output: Output signal should be filtered and sent back on chip
through FDBK_IN input
No Connect: These should be left floating.
Power Down: When this active high pin is asserted, the device goes into full power
down mode.
Chip Reset: When this active high pin is asserted, the chip goes into reset. Note: upon
power up, a 10 us reset pulse is automatically generated when the power supplies reach
a threshold and stabilize.
I/O Update: A logic transition from 0 to 1 on this pin transfers data from the I/O port
registers to the control registers (see the
Write
subsection of the
General Operation of
Serial Control Port
section).
Chip Select: Active low. When programming a device, this pin must be held low. In
systems where more than one AD9549 is present this enables individual programming
of each AD9549
Serial Data Output: When the device is in three wire mode, data is read on this pin
41
I
FDBK_IN
48
O
DAC_RSET
50
O
IOUT
51
O
IOUTB
56, 57
58
No Connect
PWRDOWN
I
3.3V
CMOS
3.3V
CMOS
59
I
RESET
60
I
3.3V
CMOS
IO_UPDATE
61
I
3.3V
CMOS
CSB
62
O
3.3V
CMOS
3.3V
CMOS
3.3V
CMOS
SDO
63
I/O
SDIO
Serial Data Input/Output: When the device is in three-wire mode, data is written via this
pin. In 2 wire mode, data reads and writes both occur on this pin
Serial Programming Clock: data clock for serial programming.
64
O
SCLK
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| AD9912/PCBZ | 制造商:Analog Devices 功能描述:Evaluation Kit For 1 GSPS Direct Digital Synthesizer W/ 14-Bit DAC 制造商:Analog Devices 功能描述:EVAL KIT FOR 1 GSPS DIRECT DGTL SYNTHESIZER W/ 14BIT DAC - Bulk 制造商:Analog Devices 功能描述:EVALUATION BOARD AD9912 1GSPS DDS |
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| AD9912ABCPZ-REEL7 | 功能描述:IC DDS 1GSPS DAC 14BIT 64LFCSP RoHS:是 類別:集成電路 (IC) >> 接口 - 直接數字合成 (DDS) 系列:- 產品變化通告:Product Discontinuance 27/Oct/2011 標準包裝:2,500 系列:- 分辨率（位）:10 b 主 fclk:25MHz 調節字寬（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） 供應商設備封裝:16-TSSOP 包裝:帶卷 (TR) |
| AD9912BCPZ | 制造商:Analog Devices 功能描述:Direct Digital Synthesizer 1000MHz 1-DAC 14-Bit Serial 64-Pin LFCSP EP 制造商:Analog Devices 功能描述:DIRECT DGTL SYNTHESIZER 64LFCSP EP - Trays 制造商:Analog Devices 功能描述:IC DDS 1GSPS 14BIT DAC |
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