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参数资料
| 型号： | AD5322ARM-REEL7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 9/24页 |
| 文件大小： | 0K |
| 描述： | IC DAC 12BIT DUAL R-R 10-MSOP TR |
| 产品培训模块： | Data Converter Fundamentals DAC Architectures |
| 标准包装： | 1,000 |
| 设置时间： | 6µs |
| 位数： | 12 |
| 数据接口： | 串行 |
| 转换器数目： | 2 |
| 电压电源： | 单电源 |
| 功率耗散（最大）： | 2.5mW |
| 工作温度： | -40°C ~ 105°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 10-MSOP |
| 包装： | 带卷 (TR) |
| 输出数目和类型： | 2 电压，单极；2 电压，双极 |
| 采样率（每秒）： | 125k |
AD5302/AD5312/AD5322
Rev. D | Page 17 of 24
MICROPROCESSOR INTERFACING
AD5302/AD5312/AD5322 TO ADSP-2101/ADSP-
2103 INTERFACE
Figure 34 shows a serial interface between the AD5302/AD5312/
AD5322 and the ADSP-2101/ADSP-2103. The ADSP-2101/ADSP-
2103 should be set up to operate in the SPORT transmit alternate
framing mode. The ADSP-2101/ADSP-2103 sport is programmed
through the SPORT control register and should be configured
as follows: internal clock operation, active low framing, 16-bit
word length. Transmission is initiated by writing a word to the
Tx register after the SPORT has been enabled. The data is clocked
out on each falling edge of the DSP’s serial clock and clocked into
the AD5302/AD5312/AD5322 on the rising edge of the DSP’s serial
clock. This corresponds to the falling edge of the DAC’s SCLK.
SCLK
DIN
SYNC
TFS
DT
SCLK
1ADDITIONAL PINS OMITTED FOR CLARITY
00
92
8-
03
4
AD5302/
AD5312/
AD53221
ADSP-2101/
ADSP-21031
Figure 34. AD5302/AD5312/AD5322 to ADSP-2101/ADSP-2103 Interface
AD5302/AD5312/AD5322 TO 68HC11/68L11
INTERFACE
Figure 35 shows a serial interface between the AD5302/AD5312/
AD5322 and the 68HC11/68L11 microcontroller. SCK of the
68HC11/68L11 drives the SCLK of the AD5302/AD5312/AD5322,
while the MOSI output drives the serial data line of the DAC.
The SYNC signal is derived from a port line (PC7). The setup
conditions for correct operation of this interface are as follows:
the 68HC11/68L11 should be configured so that its CPOL bit = 0
and its CPHA bit = 1. When data is being transmitted to the
DAC, the SYNC line is taken low (PC7). When the 68HC11/
68L11 are configured as above, data appearing on the MOSI
output is valid on the falling edge of SCK. Serial data from the
68HC11/ 68L11 is transmitted in 8-bit bytes with only eight
falling clock edges occurring in the transmit cycle. Data is
transmitted MSB first. In order to load data to the
AD5302/AD5312/AD5322, PC7 is left low after the first eight
bits are transferred and a second serial write operation is
performed to the DAC; PC7 is taken high at the end of this
procedure.
DIN
SCLK
SYNC
PC7
SCK
MOSI
68HC11/68L111
1ADDITIONAL PINS OMITTED FOR CLARITY
0
9
2
8
-0
3
5
AD5302/
AD5312/
AD53221
Figure 35. AD5302/AD5312/AD5322 to 68HC11/68L11 Interface
AD5302/AD5312/AD5322 TO 80C51/80L51
INTERFACE
Figure 36 shows a serial interface between the AD5302/AD5312/
AD5322 and the 80C51/80L51 microcontroller. The setup for
the interface is as follows: TXD of the 80C51/80L51 drives
SCLK of the AD5302/AD5312/AD5322, while RXD drives the
serial data line of the part. The SYNC signal is again derived
from a bit programmable pin on the port. In this case, port line
P3.3 is used. When data is to be transmitted to the AD5302/
AD5312/AD5322, P3.3 is taken low. The 80C51/80L51 transmit
data in 8-bit bytes only; thus only eight falling clock edges occur
in the transmit cycle. To load data to the DAC, P3.3 is left low
after the first eight bits are transmitted, and a second write cycle
is initiated to transmit the second byte of data. P3.3 is taken
high following the completion of this cycle. The 80C51/80L51
output the serial data in a format that has the LSB first. The
AD5302/AD5312/AD5322 require their data with the MSB as
the first bit received. The 80C51/80L51 transmit routine should
take this into account.
DIN
SCLK
P3.3
TXD
RXD
80C51/80L511
1ADDITIONAL PINS OMITTED FOR CLARITY
00
928
-03
6
SYNC
AD5302/
AD5312/
AD53221
Figure 36. AD5302/AD5312/AD5322 to 80C51/80L51 Interface
AD5302/AD5312/AD5322 TO MICROWIRE
INTERFACE
Figure 37 shows an interface between the AD5302/AD5312/
AD5322 and any MICROWIRE-compatible device. Serial data is
shifted out on the falling edge of the serial clock and is clocked
into the AD5302/AD5312/AD5322 on the rising edge of the SK.
DIN
SCLK
SK
SO
MICROWIRE1
1ADDITIONAL PINS OMITTED FOR CLARITY
00
92
8-
03
7
CS
SYNC
AD5302/
AD5312/
AD53221
Figure 37. AD5302/AD5312/AD5322 to MICROWIRE Interface
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