參數(shù)資料
型號: AD9778BSVZRL
廠商: Analog Devices Inc
文件頁數(shù): 21/56頁
文件大?。?/td> 0K
描述: IC DAC 14BIT DUAL 1GSPS 100TQFP
產(chǎn)品培訓(xùn)模塊: DAC Architectures
標(biāo)準(zhǔn)包裝: 1,000
位數(shù): 14
數(shù)據(jù)接口: 并聯(lián)
轉(zhuǎn)換器數(shù)目: 2
電壓電源: 模擬和數(shù)字
功率耗散(最大): 300mW
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 100-TQFP 裸露焊盤
供應(yīng)商設(shè)備封裝: 100-TQFP-EP(14x14)
包裝: 帶卷 (TR)
輸出數(shù)目和類型: 4 電流,單極;4 電流,雙極
采樣率(每秒): 1G
AD9776/AD9778/AD9779
Rev. A | Page 28 of 56
Table 12. SPI Register Description
Address
Register Name
Reg. No.
Bits
Description
Function
Default
Comm Register
00
7
SDIO bidirectional
0: use SDIO pin as input data only
0
1: use SDIO as both input and output data
00
6
LSB/MSB first
0: first bit of serial data is MSB of data byte
0
1: first bit of serial data is LSB of data byte
00
5
Software reset
Bit must be written with a 1, then 0 to soft
reset SPI register map
0
00
4
Power-down mode
0: all circuitry is active
1: disable all digital and analog circuitry,
only SPI port is active
00
3
Auto power-down enable
Controls auto power-down mode, see the
0
00
1
PLL lock (read only)
0: PLL is not locked
1: PLL is locked
0
Digital Control Register
01
7:6
Filter interpolation factor
00: 1× interpolation
00
01: 2× interpolation
10: 4× interpolation
11: 8× interpolation
01
5:2
Filter modulation mode
See Table 21 for filter modes
0000
01
0
Zero stuffing
0: zero stuffing off
0
1: zero stuffing on
02
7
Data format
0: signed binary
0
1: unsigned binary
02
6
Dual/interleaved data bus mode
0: both input data ports receive data
0
1: Data Port 1 only receives data
02
5
Real mode
0: enable Q path for signal processing
0
1: disable Q path data (internal Q channel
clocks disabled, I and Q modulators
disabled)
02
4
DATACLK delay enable
02
3
Inverse sinc enable
0: inverse sinc filter disabled
0
1: inverse sinc filter enabled
02
2
DATACLK invert
0: output DATACLK same phase as internal
capture clock
0
1: output DATACLK opposite phase as
internal capture clock
02
1
TxEnable invert
Inverts the function of TxEnable Pin 39, see
0
02
0
Q first
0: first byte of data is always I data at
beginning of transmit
1: first byte of data is always Q data at
beginning of transmit
Sync Control Register
03
7:6
Data clock delay mode
00: manual
00
03
5:4
Extra data clock divide ratio
Data clock output divider (see Table 22 for
divider ratio)
00
03
3:0
Reserved
000
04
7:4
Data clock delay
Sets delay of REFCLK in to DATACLK out
0000
04
3:1
Output sync pulse divide
Sets frequency of SYNC_O pulses
000
04
0
Sync out delay
Sync output delay, Bit 4
05
7:4
Sync out delay
Sync output delay, Bits<3:0>
0
05
3:1
Input sync pulse frequency
Input sync pulse frequency divider, see the
000
05
0
Sync input delay
Sync input delay, Bit 4
0
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