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| 型号： | AD8801 |
| 厂商： | Analog Devices, Inc. |
| 英文描述： | Octal 8-Bit TrimDAC with Power Shutdown(带电源关断的八路8位微调D/A转换器) |
| 中文描述： | 八进制8位功耗关断TrimDAC（带电源关断的八路8位微调的D / A转换器） |
| 文件页数： | 12/16页 |
| 文件大小： | 223K |
| 代理商： | AD8801 |
REV. A
–12–
AD8801/AD8803
O1
O2
O3
O4
O5
O6
O7
O8
CS
SHDN
V
DD
V
REFH
AD8803
GND
+5V
P1.7
P1.6
P1.5
P1.4
1.5
1.6
1.7
PORT 1
8051 μC
1.4
SDI
CLK
V
REFL
Figure 26. An AD8801/AD8803-8051
μ
C Interface Using
Parallel Port 1
Unlike the serial port interface of Figure 25, the parallel port in-
terface only transmits 11 bits to the AD8801/AD8803. Also, the
BYT ESWAP subroutine is not required for the parallel inter-
face, because data can be shifted out MSB first. However, the
results of the two interface methods are exactly identical. In
most cases, the decision on which method to use will be deter-
mined by whether or not the serial data port is available for
communication with the AD8801/AD8803.
An MC68HC11-to-AD8801/AD8803 Interface
Like the 8051, the MC68HC11 includes a dedicated serial data
port (labeled SPI). T he SPI port provides an easy interface to
the AD8801/AD8803 (Figure 27). T he interface uses three lines
of Port D for the serial data, and one or two lines from Port C
to control the
SHDN
and
RS
(AD8801 only) inputs.
SDI
CLK
CS
SHDN
RS (
AD8801 ONLY)
AD8801/
AD8803*
MC68HC11
*
MOSI
SCK
SS
PC0
PC1
(PD3)
(PD4)
(PD5)
*ADDITIONAL PINS OMITTED FOR CLARITY
Figure 27. An AD8801/AD8803-to-MC68HC11 Interface
A software routine for loading the AD8801/AD8803 from a
68HC11 evaluation board is shown in Listing 3. First, the
MC68HC11 is configured for SPI operation. Bits CPHA and
CPOL define the SPI mode wherein the serial clock (SCK ) is
high at the beginning and end of transmission, and data is valid
on the rising edge of SCK . T his mode matches the requirements
of the AD8801/AD8803. After the registers are saved on the
stack, the DAC value and address are transferred to RAM and
the AD8801/AD8803’s
CS
is driven low. Next, the DAC’s ad-
dress byte is transferred to the SPDR register, which automati-
cally initiates the SPI data transfer. T he program tests the SPIF
bit and loops until the data transfer is complete. T hen the DAC
value is sent to the SPI. When transmission of the second byte is
complete,
CS
is driven high to load the new data and address
into the AD8801/AD8803.
相关PDF资料 |
PDF描述 |
|---|---|
| AD8803 | Octal 8-Bit TrimDAC with Power Shutdown(带电源关断八路8位微调D/A转换器) |
| AD8803AR | Octal 8-Bit TrimDAC with Power Shutdown |
| AD8803AN | Octal 8-Bit TrimDAC with Power Shutdown |
| AD8801AN | Octal 8-Bit TrimDAC with Power Shutdown |
| AD8801AR | Octal 8-Bit TrimDAC with Power Shutdown |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AD8801AN | 制造商:Rochester Electronics LLC 功能描述:8CH 8-BIT TRIMDAC W/PWR SHDN - Bulk |
| AD8801AR | 功能描述:IC DAC 8BIT OCTAL W/SD 16-SOIC RoHS:否 类别:集成电路 (IC) >> 数据采集 - 数模转换器 系列:TrimDAC® 标准包装:47 系列:- 设置时间:2µs 位数:14 数据接口:并联 转换器数目:1 电压电源:单电源 功率耗散（最大）:55µW 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:28-SSOP（0.209"，5.30mm 宽） 供应商设备封装:28-SSOP 包装:管件 输出数目和类型:1 电流，单极；1 电流，双极 采样率（每秒）:* |
| AD8801AR-REEL | 功能描述:IC DAC 8BIT OCTAL W/SD 16-SOIC RoHS:否 类别:集成电路 (IC) >> 数据采集 - 数模转换器 系列:TrimDAC® 产品培训模块:LTC263x 12-, 10-, and 8-Bit VOUT DAC Family 特色产品:LTC2636 - Octal 12-/10-/8-Bit SPI VOUT DACs with 10ppm/°C Reference 标准包装:91 系列:- 设置时间:4µs 位数:10 数据接口:MICROWIRE?，串行，SPI? 转换器数目:8 电压电源:单电源 功率耗散（最大）:2.7mW 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-WFDFN 裸露焊盘 供应商设备封装:14-DFN-EP（4x3） 包装:管件 输出数目和类型:8 电压，单极 采样率（每秒）:* |
| AD8801ARZ | 功能描述:IC DAC 8BIT OCTAL W/SD 16-SOIC RoHS:是 类别:集成电路 (IC) >> 数据采集 - 数模转换器 系列:TrimDAC® 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:50 系列:- 设置时间:4µs 位数:12 数据接口:串行 转换器数目:2 电压电源:单电源 功率耗散（最大）:- 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-uMAX 包装:管件 输出数目和类型:2 电压，单极 采样率（每秒）:* 产品目录页面:1398 (CN2011-ZH PDF) |
| AD8801ARZ-REEL | 功能描述:IC DAC 8BIT OCTAL W/SD 16SOIC RoHS:是 类别:集成电路 (IC) >> 数据采集 - 数模转换器 系列:TrimDAC® 产品培训模块:LTC263x 12-, 10-, and 8-Bit VOUT DAC Family 特色产品:LTC2636 - Octal 12-/10-/8-Bit SPI VOUT DACs with 10ppm/°C Reference 标准包装:91 系列:- 设置时间:4µs 位数:10 数据接口:MICROWIRE?，串行，SPI? 转换器数目:8 电压电源:单电源 功率耗散（最大）:2.7mW 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-WFDFN 裸露焊盘 供应商设备封装:14-DFN-EP（4x3） 包装:管件 输出数目和类型:8 电压，单极 采样率（每秒）:* |
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