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| 型号： | AD7478AARMZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 17/29页 |
| 文件大小： | 0K |
| 描述： | IC ADC 8BIT 1MSPS 8-MSOP |
| 标准包装： | 50 |
| 位数： | 8 |
| 采样率（每秒）： | 1M |
| 数据接口： | DSP，MICROWIRE?，QSPI?，串行，SPI? |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 17.5mW |
| 电压电源： | 单电源 |
| 工作温度： | -40°C ~ 85°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 |
| 输入数目和类型： | 1 个单端，单极 |
| 产品目录页面： | 778 (CN2011-ZH PDF) |
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AD7476A/AD7477A/AD7478A
Rev. F | Page 23 of 28
MICROPROCESSOR INTERFACING
The serial interface on the AD7476A/AD7477A/AD7478A
allows the part to be directly connected to a range of different
microprocessors. This section explains how to interface the
AD7476A/AD7477A/AD7478A with some of the more
common microcontroller and DSP serial interface protocols.
AD7476A/AD7477A/AD7478A TO TMS320C541
INTERFACE
The serial interface on the TMS320C541 uses a continuous
serial clock and frame synchronization signals to synchronize
the data transfer operations with peripheral devices, such as
the AD7476A/AD7477A/AD7478A. The CS input allows easy
interfacing between the TMS320C541 and the AD7476A/
AD7477A/AD7478A without any glue logic required. The serial
port of the TMS320C541 is set up to operate in burst mode
(FSM = 1 in the serial port control register, SPC) with Internal
Serial Clock CLKX (MCM = 1 in the SPC register) and internal
frame signal (TXM = 1 in the SPC register), so both pins are
configured as outputs. For the AD7476A, set the word length to
16 bits (FO = 0 in the SPC register). This DSP only allows
frames with a word length of 16 bits or 8 bits. Therefore, in the
case of the AD7477A and AD7478A where 14 bits and 12 bits
are required, the FO bit is set up to 16 bits. This means that to
obtain the conversion result, 16 SCLKs are needed. In both
situations, the remaining SCLKs clock out trailing zeros. For the
AD7477A, two trailing zeros are clocked out in the last two clock
cycles; for the AD7478A, four trailing zeros are clocked out.
To summarize, the values in the SPC register are
FO = 0
FSM = 1
MCM = 1
TXM = 1
The format bit, FO, can be set to 1 to set the word length to
eight bits in order to implement the power-down mode on the
AD7476A/AD7477A/AD7478A.
The connection diagram is shown in Figure 28. For signal
processing applications, it is imperative that the frame
synchronization signal from the TMS320C541 provide
equidistant sampling.
AD7476A/
AD7477A/
AD7478A1
SCLK
SDATA
CS
CLKX
CLKR
FSX
FSR
TMS320C5411
1ADDITIONAL PINS OMITTED FOR CLARITY.
DR
02930-028
Figure 28. Interfacing to the TMS320C541
AD7476A/AD7477A/AD7478A TO ADSP-218x
INTERFACE
The ADSP-218x family of DSPs are interfaced directly to the
AD7476A/AD7477A/AD7478A without any glue logic
required. Set up the SPORT control register as follows:
TFSW = RFSW = 1, alternate framing
INVRFS = INVTFS = 1, active low frame signal
DTYPE = 00, right justify data
ISCLK = 1, internal serial clock
TFSR = RFSR = 1, frame every word
IRFS = 0, sets up RFS as an input
ITFS = 1, sets up TFS as an output
SLEN = 1111, 16 bits for the AD7476A
SLEN = 1101, 14 bits for the AD7477A
SLEN = 1011, 12 bits for the AD7478A
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相关代理商/技术参数 |
参数描述 |
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| AD7478AARMZ-REEL | 功能描述:IC ADC 8BIT 1MSPS 8-MSOP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:2,500 系列:- 位数:16 采样率（每秒）:15 数据接口:MICROWIRE?，串行，SPI? 转换器数目:1 功率耗散（最大）:480µW 电压电源:单电源 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:38-WFQFN 裸露焊盘 供应商设备封装:38-QFN（5x7） 包装:带卷 (TR) 输入数目和类型:16 个单端，双极；8 个差分，双极 配用:DC1011A-C-ND - BOARD DELTA SIGMA ADC LTC2494 |
| AD7478AARMZ-REEL7 | 功能描述:IC ADC 8BIT 1MSPS 8-MSOP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:2,500 系列:- 位数:16 采样率（每秒）:15 数据接口:MICROWIRE?，串行，SPI? 转换器数目:1 功率耗散（最大）:480µW 电压电源:单电源 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:38-WFQFN 裸露焊盘 供应商设备封装:38-QFN（5x7） 包装:带卷 (TR) 输入数目和类型:16 个单端，双极；8 个差分，双极 配用:DC1011A-C-ND - BOARD DELTA SIGMA ADC LTC2494 |
| AD7478ART | 制造商:Analog Devices 功能描述:ADC SGL SAR 1MSPS 8BIT SERL 6PIN SOT-23 - Bulk |
| AD7478ART-500RL7 | 功能描述:IC ADC 8BIT 1MSPS SOT-23-6 RoHS:否 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 位数:12 采样率（每秒）:3M 数据接口:- 转换器数目:- 功率耗散（最大）:- 电压电源:- 工作温度:- 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商设备封装:SOT-23-6 包装:带卷 (TR) 输入数目和类型:- |
| AD7478ART-REEL | 制造商:AD 制造商全称:Analog Devices 功能描述:1 MSPS, 12-/10-/8-Bit ADCs in 6-Lead SOT-23 |
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