参数资料
型号: AD9778BSVZ
厂商: Analog Devices Inc
文件页数: 22/56页
文件大小: 0K
描述: IC DAC 14BIT DUAL 1GSPS 100TQFP
产品培训模块: DAC Architectures
标准包装: 1
位数: 14
数据接口: 并联
转换器数目: 2
电压电源: 模拟和数字
功率耗散(最大): 300mW
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 100-TQFP 裸露焊盘
供应商设备封装: 100-TQFP-EP(14x14)
包装: 托盘
输出数目和类型: 4 电流,单极;4 电流,双极
采样率(每秒): 1G
AD9776/AD9778/AD9779
Rev. A | Page 29 of 56
Address
Register Name
Reg. No.
Bits
Description
Function
Default
Sync Control Register
06
7:4
Sync input delay
section for details on using these registers
to synchronize multiple DACs
0
06
3:0
Input sync pulse timing error
tolerance
0
07
7
Sync receiver enable
0
07
6
Sync driver enable
0
07
5
Sync triggering edge
0
07
4:0
SYNC_I to input data sampling
clock offset
0
PLL Control
08
7:2
PLL band select
VCO frequency range vs. PLL band select
value (see Table 18)
111001
08
1:0
VCO AGC gain control
Lower number (low gain) is generally better
for performance
11
09
7
PLL enable
0: PLL off, DAC rate clock supplied by
outside source
0
1: PLL on, DAC rate clock synthesized
internally from external reference clock via
PLL clock multiplier
09
6:5
PLL VCO divide ratio
FVCO/fDAC
00 × 1
01 × 2
10 × 4
11 × 8
09
4:3
PLL loop divide ratio
fDAC/fREF
00 × 2
01 × 4
10 × 8
11 × 16
09
2:0
PLL bias setting
Always set to 010
010
0A
7:5
PLL control voltage range
000 to 111, proportional to voltage at PLL
loop filter output, readback only
Misc Control
0A
4:0
PLL loop bandwidth adjustment
details
I DAC Control Register
0B
7:0
I DAC gain adjustment
(7:0) LSB slice of 10-bit gain setting word
for I DAC
11111001
0C
7
I DAC sleep
0: I DAC on
0
1: I DAC off
0C
6
I DAC power-down
0: I DAC on
0
1: I DAC off
0C
1:0
I DAC gain adjustment
(9:8) MSB slice of 10-bit gain setting word
for I DAC
01
0D
7:0
Aux DAC1 gain adjustment
(7:0) LSB slice of 10-bit gain setting word for
Aux DAC1
00000000
0E
7
Aux DAC1 sign
0: positive
1: negative
0E
6
Aux DAC1 current direction
0: source
0
1: sink
0E
5
Aux DAC1 power-down
0: Aux DAC1 on
0
1: Aux DAC1 off
Aux DAC1 Control
Register
0E
1:0
Aux DAC1 gain adjustment
(9:8) MSB slice of 10-bit gain setting word
for Aux DAC1
00
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