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参数资料
| 型号： | AD9747BCPZRL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 14/28页 |
| 文件大小： | 0K |
| 描述： | IC DAC DUAL 16B 250MSPS 72-LFCSP |
| 产品培训模块： | Data Converter Fundamentals DAC Architectures |
| 标准包装： | 2,000 |
| 位数： | 16 |
| 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）： | 345mW |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 72-VFQFN 裸露焊盘，CSP |
| 供应商设备封装： | 72-LFCSP |
| 包装： | 带卷 (TR) |
| 输出数目和类型： | 4 电流，单极 |
| 采样率（每秒）： | 250M |
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Data Sheet
AD9741/AD9743/AD9745/AD9746/AD9747
Rev. A | Page 21 of 28
SPI REGISTER DESCRIPTIONS
Table 15.
Register
Address
Bit
Name
Description
SPI Control
0x00
7
SDIODIR
0, operate SPI in 4-wire mode, SDIO pin operates as an input only
1, operate SPI in 3-wire mode, SDIO pin operates as a bidirectional I/O line
6
LSBFIRST
0, LSBFIRST off, SPI serial data mode is MSB to LSB
1, LSBFIRST on, SPI serial data mode is LSB to MSB
5
SWRESET
0, resume normal operation following software RESET
1, software RESET; loads default values to all registers (except Register 0x00)
Data Control
0x02
7
DATTYPE
0, DAC input data is twos complement binary format
1, DAC input data is unsigned binary format
6
ONEPORT
0, normal two port input mode
1, optional single port input mode, interleaved data received on Port 1 only
4
INVDCO
1, inverts data clock output signal
Power Down
0x03
7
PD_DCO
1, power down data clock output
5
PD_AUX2
1, power down AUX2 DAC
4
PD_AUX1
1, power down AUX1 DAC
3
PD_BIAS
1, power down reference voltage bias circuit
2
PD_CLK
1, power down DAC clock input circuit
1
PD_DAC2
1, power down DAC2 analog output
0
PD_DAC1
1, power down DAC1 analog output
DAC Mode Select
0x0A
3:2
DAC1MOD<1:0>
00, selects normal mode, DAC1
01, selects mix mode, DAC1
10, selects return-to-zero mode, DAC1
1:0
DAC2MOD<1:0>
00, selects normal mode, DAC2
01, selects mix mode, DAC2
10, selects return-to-zero mode, DAC2
DAC1 Gain
0x0B
7:0
DAC1FSC<7:0>
DAC1 full-scale 10-bit adjustment word
0x0C
1:0
DAC1FSC<9:8>
0x03FF, sets full-scale current to the maximum value of 31.66 mA
0x01F9, sets full-scale current to the nominal value of 20.0 mA
0x0000, sets full-scale current to the minimum value of 8.64 mA
AUX DAC1
0x0D
7:0
AUXDAC1<7:0>
Auxiliary DAC1 10-bit output current adjustment word
0x0E
1:0
AUXDAC1<9:8>
0x03FF, sets output current magnitude to 2.0 mA
0x0200, sets output current magnitude to 1.0 mA
0x0000, sets output current magnitude to 0.0 mA
7
AUX1PIN
1, AUX1P output pin is active
0, AUX1N output pin is active
6
AUX1DIR
0, configures AUX1 DAC output to source current
1, configures AUX1 DAC output to sink current
DAC2 Gain
0x0F
7:0
DAC2FSC<7:0>
DAC2 full-scale 10-bit adjustment word
0x10
1:0
DAC2FSC<9:8>
0x03FF, sets full-scale current to the maximum value of 31.66 mA
0x01F9, sets full-scale current to the nominal value of 20.0 mA
0x0000, sets full-scale current to the minimum value of 8.64 mA
AUX DAC2
0x11
7:0
AUXDAC2<7:0>
Auxiliary DAC2 10-bit output current adjustment word
0x12
1:0
AUXDAC2<9:8>
0x03FF, sets output current magnitude to 2.0 mA
0x0200, sets output current to 1.0 mA
0x0000, sets output current to 0.0 mA
7
AUX2PIN
1, AUX2P output pin is active
0, AUX2N output pin is active
6
AUX2DIR
0, configures AUX2 DAC output to source current
1, configures AUX2 DAC output to sink current
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