參數(shù)資料
型號: AD9146BCPZ
廠商: Analog Devices Inc
文件頁數(shù): 48/56頁
文件大?。?/td> 0K
描述: IC DAC 16BIT SRL DUAL 48LFCSP
標(biāo)準(zhǔn)包裝: 1
系列: TxDAC+®
設(shè)置時間: 20ns
位數(shù): 16
數(shù)據(jù)接口: 串行
轉(zhuǎn)換器數(shù)目: 2
電壓電源: 模擬和數(shù)字
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 48-WFQFN 裸露焊盤,CSP
供應(yīng)商設(shè)備封裝: 48-LFCSP-WQ(7x7)
包裝: 托盤
輸出數(shù)目和類型: 2 電流,單極
采樣率(每秒): 1.23G
AD9146
Data Sheet
Rev. A | Page 52 of 56
EXAMPLE START-UP ROUTINE
To ensure reliable start-up of the AD9146, certain sequences
should be followed. This section shows an example start-up
routine. This example uses the configuration described in the
DEVICE CONFIGURATION
The following device configuration is used for this example.
fDATA = 122.88 MSPS
Interpolation is 4×, using HB1 = 10 and HB2 = 010010
Input data is baseband data
fOUT = 140 MHz
fREFCLK = 122.88 MHz
PLL is enabled
Inverse sinc filter is enabled
Synchronization is enabled
DERIVED PLL SETTINGS
The following PLL settings can be derived from the device
configuration.
fDACCLK = fDATA × interpolation = 491.52 MHz
fVCO = 4 × fDACCLK = 1966.08 MHz (1 GHz < fVCO < 2 GHz)
N1 = fDACCLK/fREFCLK = 4
N2 = fVCO/fDACCLK = 4
START-UP SEQUENCE
The following sequence configures the power clock and register
write sequencing for reliable device start-up.
Power up Device (no specific power supply
sequence is required)
Apply stable REFCLK input signal.
Apply stable DCI input signal.
Device Configuration Register Write Sequence:
0x00
0x20 /* Issue Software Reset */
0x00
0x80 /* Enable 3-wire SPI */
0x1E
0x01
/* Start PLL */
0x0C
0xE1
0x0D
0xD9
0x0A
0xCF
0x0A
0xA0
/* Verify PLL is Locked */
Read 0x0E
/* Expect bit 7 = 0, bit 6 = 1 */
Read 0x06
/* Expect 0x5C */
0x10
0x48 /* Choose Data Rate Mode */
0x17
0x04 /* Issue Software FIFO Reset */
0x18
0x02
0x18
0x00
/* Verify FIFO Reset */
Read 0x18
/* Expect 0x05 */
Read 0x19
/* Expect 0x07 */
0x1B
0xA4 /* Enable Inverse Sinc */
/* Configure Interpolation Filters */
0x1C
0x04
0x1D
0x24
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