参数资料
| 型号： | AD7655ACPZRL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 17/28页 |
| 文件大小： | 0K |
| 描述： | IC ADC 16BIT 4CHAN 48LFCSP |
| 标准包装： | 2,500 |
| 系列： | PulSAR® |
| 位数： | 16 |
| 采样率（每秒）： | 1M |
| 数据接口： | 串行，并联 |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 135mW |
| 电压电源： | 模拟和数字 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 48-VFQFN 裸露焊盘，CSP |
| 供应商设备封装： | 48-LFCSP-VQ（7x7） |
| 包装： | 带卷 (TR) |
| 输入数目和类型： | 2 个差分，单极 |
| 配用： | EVAL-AD7655CBZ-ND - BOARD EVALUATION FOR AD7655 |
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AD7655
Rev. B | Page 24 of 28
MICROPROCESSOR INTERFACING
The AD7655 is ideally suited for traditional dc measurement
applications supporting a microprocessor and for ac signal
processing applications interfacing to a digital signal processor.
The AD7655 is designed to interface with either a parallel
8-bit-wide or 16-bit-wide interface, a general-purpose serial port,
or I/O ports on a microcontroller. A variety of external buffers
can be used with the AD7655 to prevent digital noise from
coupling into the ADC. The following section describes the use of
the AD7655 with an SPI-equipped DSP, the ADSP-219x.
SPI INTERFACE (ADSP-219X)
Figure 33 shows an interface diagram between the AD7655 and
the SPI1-equipped ADSP-219x. To accommodate the slower
speed of the DSP, the AD7655 acts as a slave device and data
must be read after conversion. This mode also allows the daisy-
chain feature to be used. The convert command can be initiated
in response to an internal timer interrupt. The 32-bit output
data is read with two serial peripheral interface (SPI) 16-bit
wide accesses. The reading process can be initiated in response
to the end of conversion signal (BUSY going low) using an
interrupt line of the DSP. The SPI on the ADSP-219x is
configured for master mode—(MSTR) = 1, Clock Polarity bit
(CPOL) = 0, Clock Phase bit (CPHA) = 1, and SPI Interrupt
Enable (TIMOD) = 00—by writing to the SPI control register
(SPICLTx). To meet all timing requirements, the SPI clock
should be limited to 17 Mbps, which allows it to read an ADC
result in less than 1 μs. When a higher sampling rate is desired,
use of one of the parallel interface modes is recommended.
AD7655*
ADSP-219x*
SER/PAR
PFx
MISOx
SCKx
PFx or TFSx
BUSY
SDOUT
SCLK
CNVST
EXT/INT
CS
RD
INVSCLK
DVDD
*ADDITIONAL PINS OMITTED FOR CLARITY
SPIxSEL (PFx)
03536-033
Figure 33. Interfacing the AD7655 to SPI Interface
相关PDF资料 |
PDF描述 |
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| AD7656YSTZ-REEL | IC ADC 16BIT 6CH 250KSPS 64LQFP |
| AD7657YSTZ-1 | IC ADC 14BIT 6CH 250KSPS 64LQFP |
| AD7660ASTZRL | IC ADC 16BIT UNIPOLAR 48LQFP |
| AD7661ASTZ | IC ADC 16BIT W/REF 48-LQFP |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD7655AST | 制造商:Analog Devices 功能描述:ADC Single SAR 1Msps 16-bit Parallel/Serial 48-Pin LQFP 制造商:Analog Devices 功能描述:IC 16BIT ADC SMD 7655 LQFP48 |
| AD7655ASTRL | 制造商:Analog Devices 功能描述:ADC Single SAR 1Msps 16-bit Parallel/Serial 48-Pin LQFP T/R |
| AD7655ASTZ | 功能描述:IC ADC 16BIT 1MSPS QUAD 48-LQFP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:PulSAR® 标准包装:1 系列:microPOWER™ 位数:8 采样率（每秒）:1M 数据接口:串行，SPI? 转换器数目:1 功率耗散（最大）:- 电压电源:模拟和数字 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:24-VFQFN 裸露焊盘 供应商设备封装:24-VQFN 裸露焊盘（4x4） 包装:Digi-Reel® 输入数目和类型:8 个单端，单极 产品目录页面:892 (CN2011-ZH PDF) 其它名称:296-25851-6 |
| AD7655ASTZ | 制造商:Analog Devices 功能描述:CONVERTER A/D ((NW)) |
| AD7655ASTZRL | 功能描述:IC ADC 16BIT 4CHAN 48LQFP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:PulSAR® 标准包装:1,000 系列:- 位数:12 采样率（每秒）:300k 数据接口:并联 转换器数目:1 功率耗散（最大）:75mW 电压电源:单电源 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:24-SOIC（0.295"，7.50mm 宽） 供应商设备封装:24-SOIC 包装:带卷 (TR) 输入数目和类型:1 个单端，单极；1 个单端，双极 |
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