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參數(shù)資料
| 型號(hào)： | AD7367BRUZ-RL7 |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 18/29頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 14BIT SAR 1MSPS 24TSSOP |
| 設(shè)計(jì)資源： | Driving the AD7366/7 Bipolar SAR ADC in Low-Distortion DC-Coupled Appls (CN0042) |
| 標(biāo)準(zhǔn)包裝： | 1,000 |
| 位數(shù)： | 14 |
| 采樣率（每秒）： | 1M |
| 數(shù)據(jù)接口： | DSP，MICROWIRE?，QSPI?，串行，SPI? |
| 轉(zhuǎn)換器數(shù)目： | 2 |
| 功率耗散（最大）： | 88.8mW |
| 電壓電源： | 模擬和數(shù)字，雙 ± |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 24-TSSOP（0.173"，4.40mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 24-TSSOP |
| 包裝： | 帶卷 (TR) |
| 輸入數(shù)目和類型： | 4 個(gè)單端，單極；4 個(gè)單端，雙極 |
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AD7366/AD7367
Rev. D | Page 24 of 28
MICROPROCESSOR INTERFACING
The serial interface on the AD7366/AD7367 allows the parts to
be directly connected to a range of different microprocessors.
This section explains how to interface the AD7366/AD7367
with some common microcontrollers and DSP serial interface
protocols.
AD7366/AD7367 TO ADSP-218x
The ADSP-218x family of DSPs interfaces directly to the
AD7366/AD7367 without any glue logic required. The VDRIVE
pin of the AD7366/AD7367 takes the same supply voltage as the
power supply pin of the ADSP-218x. This allows the ADC to
operate at a higher supply voltage than its serial interface and
therefore, the ADSP-218x, if necessary. This example shows
both DOUTA and DOUTB of the AD7366/AD7367 connected to
both serial ports of the ADSP-218x. The SPORT0 and SPORT1
control registers should be set up as shown in Table 11 and
Table 11. SPORT0 Control Register Setup
Setting
Description
TFSW = RFSW = 1
Alternate framing
INVRFS = INVTFS = 1
Active low frame signal
DTYPE = 00
Right-justify data
SLEN = 1111
16-bit data-word (or can be set to 1101
for 14-bit data-word)
ISCLK = 1
Internal serial clock
TFSR = RFSR = 1
Frame every word
IRFS = 0
ITFS = 1
Table 12. SPORT1 Control Register Setup
Setting
Description
TFSW = RFSW = 1
Alternate framing
INVRFS = INVTFS = 1
Active low frame signal
DTYPE = 00
Right-justify data
SLEN = 1111
16-bit data-word (or can be set to 1101
for 14-bit data-word)
ISCLK = 0
External serial clock
TFSR = RFSR = 1
Frame every word
IRFS = 0
ITFS = 1
The connection diagram is shown in Figure 29. The ADSP-218x
has the TFS0 and RFS0 of the SPORT0 and the RFS1 of SPORT1
tied together. TFS0 is set as an output, and both RFS0 and RFS1
are set as inputs. The DSP operates in alternate framing mode,
and the SPORT control register is set up as described in Table 11
and Table 12. The frame synchronization signal generated on
the TFS is tied to CS.
AD7366/
AD7367*
SCLK
CS
ADSP-218x*
*ADDITIONAL PINS OMITTED FOR CLARITY.
SCLK0
DR0
RFS0
TFS0
DOUTA
VDRIVE
VDD
DOUTB
DR1
RFS1
SCLK1
IRQ
BUSY
CNVST
FLO
06703-
031
Figure 29. Interfacing the AD7366/AD7367 to the ADSP-218x
The AD7366/AD7367 BUSY line provides an interrupt to
the ADSP-218x when the conversion is complete. The conver-
sion results can then be read from the AD7366/AD7367 using
a read operation. When an interrupt is received on IRQ from
the BUSY signal, a value is transmitted with TFS/DT (ADC
control word). The TFS is used to control the RFS and, therefore,
the reading of data.
AD7366/AD7367 TO ADSP-BF53x
The ADSP-BF53x family of DSPs interfaces directly to the
AD7366/AD7367 without any glue logic required. The avail-
ability of secondary receive registers on the serial ports of the
Blackfin DSPs means that only one serial port is necessary to
read from both the DOUTA and DOUTB pins simultaneously.
connected to Serial Port 0 of the ADSP-BF53x. The SPORT0
Receive Configuration 1 register and the SPORT0 Receive
Configuration 2 register should be set up as outlined in Table 13
and Table 14.
SERIAL
DEVICE A
(PRIMARY)
SERIAL
DEVICE B
(SECONDARY)
AD7366/
AD7367*
DOUTA
CS
SCLK
ADSP-BF53x*
*ADDITIONAL PINS OMITTED FOR CLARITY.
DR0PRI
PFN
RFS0
VDRIVE
VDD
CNVST
RCLK0
RXINTS
BUSY
DR0SEC
DOUTB
SPORT0
06703-
032
Figure 30. Interfacing the AD7366/AD7367 to the ADSP-BF53x
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