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参数资料
| 型号： | ADC08038CIN |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | ADC |
| 英文描述： | 8-Bit High-Speed Serial I/O A/D Converters with Multiplexer Options, Voltage Reference, and Track/Hold Function |
| 中文描述： | 8-CH 8-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDIP20 |
| 封装： | 0.300 INCH, DIP-20 |
| 文件页数： | 12/24页 |
| 文件大小： | 552K |
| 代理商： | ADC08038CIN |
Functional Description
(Continued)
TABLE 4. MUX Addressing: ADC08034
Single-Ended MUX Mode
MUX Address
SGL/
DIF
1
1
1
1
Channel
#
1
START
ODD/
SIGN
0
0
1
1
SELECT
1
0
1
0
1
0
2
3
1
1
1
1
+
+
+
+
COM is internally tied to AGND
MUX Addressing:
ADC08032
Single-Ended MUX Mode
MUX Address
START
SGL/
DIF
1
1
1
1
Channel
#
0
ODD/
SIGN
0
1
1
+
+
COM is internally tied to AGND
Differential MUX Mode
MUX Address
SGL/
DIF
0
0
0
0
Channel
#
1
START
ODD/
SIGN
0
0
1
1
SELECT
1
0
1
0
1
0
2
3
1
1
1
1
+
+
+
+
Differential MUX Mode
MUX Address
START
SGL/
DIF
1
1
Channel
#
0
ODD/
SIGN
0
1
1
0
0
+
+
Since the input configuration is under software control, it can
be modified as required before each conversion. A channel
can be treated as a single-ended, ground referenced input
for one conversion; then it can be reconfigured as part of a
differential channel for another conversion. Figure 1 illus-
trates the input flexibility which can be achieved.
The analog input voltages for each channel can range from
50mV below ground to 50mV above V
CC
(typically 5V) with-
out degrading conversion accuracy.
2.0 THE DIGITAL INTERFACE
A most important characteristic of these converters is their
serial data link with the controlling processor. Using a serial
communication format offers two very significant system im-
provements; it allows many functions to be included in a
small package and it can eliminate the transmission of low
level analog signals by locating the converter right at the
analog sensor; transmitting highly noise immune digital data
back to the host processor.
To understand the operation of these converters it is best to
refer to the Timing Diagrams and Functional Block Diagram
and to follow a complete conversion sequence. For clarity a
separate timing diagram is shown for each device.
1.
A conversion is initiated by pulling the CS (chip select)
line low. This line must be held low for the entire conver-
sion. The converter is now waiting for a start bit and its
MUX assignment word.
2.
On each rising edge of the clock the status of the data in
(DI) line is clocked into the MUX address shift register.
The start bit is the first logic “1” that appears on this line
(all leading zeros are ignored). Following the start bit the
converter expects the next 2 to 4 bits to be the MUX as-
signment word.
A
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADC08038CIWM | 功能描述:IC ADC 8BIT HS SERIAL I/O 20SOIC 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:- |
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| ADC08038CIWMX | 功能描述:IC ADC 8BIT HS SERIAL I/O 20SOIC 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:- |
| ADC08038CMJ | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Texas Instruments 功能描述: |
| ADC0803CD | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:CMOS 8-bit A/D converters |
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