参数资料
型号: AD5320BRM
厂商: Analog Devices Inc
文件页数: 6/20页
文件大小: 0K
描述: IC DAC 12BIT 2.7V R-R OUT 8-MSOP
产品培训模块: Data Converter Fundamentals
DAC Architectures
标准包装: 50
设置时间: 8µs
位数: 12
数据接口: DSP,MICROWIRE?,QSPI?,串行,SPI?
转换器数目: 1
电压电源: 单电源
工作温度: -40°C ~ 105°C
安装类型: 表面贴装
封装/外壳: 8-TSSOP,8-MSOP(0.118",3.00mm 宽)
供应商设备封装: 8-MSOP
包装: 管件
输出数目和类型: 1 电压,双极
采样率(每秒): 125k
AD5320
Rev. C | Page 14 of 20
MICROPROCESSOR INTERFACING
AD5320 TO ADSP-2101/ADSP-2103 INTERFACE
Figure 28 shows a serial interface between the AD5320 and the
ADSP-2101/ADSP-2103. The ADSP-2101/ADSP-2103 should
be set up to operate in the serial port (SPORT) transmit alter-
nate framing mode. The ADSP-2101/ADSP-2103 SPORT are
programmed through the SPORT control register and should
be configured as follows: internal clock operation, active low
framing, and 16-bit word length. Transmission is initiated by
writing a word to the Tx register after the SPORT has been
enabled.
AD5320 TO 68HC11/68L11 INTERFACE
Figure 29 shows a serial interface between the AD5320 and the
68HC11/68L11 microcontroller. SCK of the 68HC11/68L11
drives the SCLK of the AD5320, while the MOSI output drives
the serial data line of the DAC. The SYNC signal is derived
from a port line (PC7). For correct operation of this interface,
the 68HC11/68L11 should be configured so that the CPOL bit
is a 0 and the CPHA bit is a 1. When data is being transmitted
to the DAC, the SYNC line is taken low (PC7). When the
68HC11/68L11 are configured, data appearing on the MOSI
output is valid on the falling edge of SCK as shown in Figure 29.
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
AD5320, PC7 is left low after the first eight bits are transferred,
and a second serial write operation is performed to the DAC
and PC7 is taken high at the end of this procedure.
DIN
SCLK
SYNC
PC7
SCK
MOSI
68HC11/68L11*
*ADDITIONAL PINS OMITTED FOR CLARITY
0
093
4-
0
29
AD5320*
Figure 29. AD5320 to 68HC11/68L11 Interface
AD5320 TO 80C51/80L51 INTERFACE
Figure 30 shows a serial interface between the AD5320 and the
80C51/80L51 microcontrollers. TXD of the 80C51/80L51 drives
SCLK of the AD5320, 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 AD5320, P3.3 is
taken low. The 80C51/80L51 transmits data only in 8-bit bytes;
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 AD5320 requires its
data with the MSB as the first bit received. The 80C51/80L51
transmit routine should consider this.
DIN
SCLK
SYNC
P3.3
TXD
RXD
80C51/80L51*
*ADDITIONAL PINS OMITTED FOR CLARITY
009
34-
030
AD5320*
Figure 30. AD5320 to 80C51/80L51 Interface
AD5320 TO MICROWIRE INTERFACE
Figure 31 shows an interface between the AD5320 and any
MICROWIRE-compatible device. Serial data is shifted out on
the falling edge of the serial clock and is clocked into the
AD5320 on the rising edge of the SK.
DIN
SCLK
SYNC
CS
SK
SO
MICROWIRE*
*ADDITIONAL PINS OMITTED FOR CLARITY
00
93
4-
03
1
AD5320*
Figure 31. AD5320 to MICROWIRE Interface
SCLK
DIN
SYNC
TFS
DT
SCLK
ADSP-2101/
ADSP-2103*
*ADDITIONAL PINS OMITTED FOR CLARITY
00
93
4-
02
7
AD5320*
Figure 28. AD5320 to ADSP-2101/ADSP-2103 Interface
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