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參數(shù)資料
| 型號： | AD5570YRS-REEL7 |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 15/24頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC DAC 16BIT SERIAL IN 16SSOP |
| 產(chǎn)品培訓(xùn)模塊： | Data Converter Fundamentals DAC Architectures |
| 標(biāo)準(zhǔn)包裝： | 500 |
| 設(shè)置時(shí)間： | 12µs |
| 位數(shù)： | 16 |
| 數(shù)據(jù)接口： | 串行 |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 電壓電源： | 雙 ± |
| 功率耗散（最大）： | 150mW |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-SSOP（0.209"，5.30mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 16-SSOP |
| 包裝： | 帶卷 (TR) |
| 輸出數(shù)目和類型： | 1 電壓，雙極 |
| 采樣率（每秒）： | 83k |
AD5570
Rev. C | Page 22 of 24
AD5570 to ADSP21xx
An interface between the AD5570 and the ADSP21xx family is
shown in Figure 44. The ADSP21xx must be set up to operate in
the SPORT transmit alternate framing mode. The ADSP21xx is
programmed through the SPORT control register and is con-
figured 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. As the data is clocked out of the
DSP on the rising edge of SCLK, no glue logic is required to inter-
face the DSP to the DAC. In the interface shown, the DAC output
is updated using the LDAC pin via the DSP. Alternatively, the
LDAC input can be tied permanently low, and then the update
is automatic when TFS is taken high.
AD5570*
SCLK
SDIN
SYNC
DT
SCLK
RFS
ADSP21xx
*ADDITIONAL PINS OMITTED FOR CLARITY.
SDO
DR
TFS
LDAC
FO
03
76
0-
01
6
Figure 44. AD5570 to ADSP21xx Interface
AD5570 to PIC16C6x/7x
The PIC16C6x/7x synchronous serial port (SSP) is configured as
an SPI master with the clock polarity bit set to 0. This is done
by writing to the synchronous serial port control register, SSPCON
(see documentation on the PIC16/17 microcontroller). In this
example, I/O port RA1 is being used to pulse SYNC and enable
the serial port of the AD5570. This microcontroller transfers only
eight bits of data during each serial transfer operation; therefore,
two consecutive write operations are needed.
shows
the connection diagram.
AD5570*
SCLK
SDIN
SYNC
SDO/RC5
SCLK/RC3
RA1
PIC16C6x/7x*
*ADDITIONAL PINS OMITTED FOR CLARITY.
SDO
SDI/RC4
03
76
0-
0
1
7
Figure 45. AD5570 to PIC16C6x/7x Interface
EVALUATION BOARD
The AD5570 comes with a full evaluation board to aid designers
in evaluating the high performance of the part with minimal
effort. The evaluation board requires a power supply, a PC,
and an oscilloscope.
The AD5570 evaluation kit includes a populated and tested
AD5570 printed circuit board. The evaluation board inter-
faces to the parallel interface of a PC. Software is available
with the evaluation board that allows the user to easily pro-
gram the AD5570. A schematic of the evaluation board is
shown in Figure 46. The software runs on any PC installed
with Microsoft Windows 95/ Windows 98/Windows ME/
Windows 2000/Windows XP.
An application note containing full details on operating the
evaluation board comes supplied with the AD5570 evalua-
tion board.
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