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| 型号： | MCP3021A4T-E/OT |
| 厂商： | Microchip Technology |
| 文件页数： | 4/26页 |
| 文件大小： | 0K |
| 描述： | ADC 10BIT I2C INTERFACE SOT23-5 |
| 标准包装： | 1 |
| 位数： | 10 |
| 采样率（每秒）： | 22.3k |
| 数据接口： | I²C，串行 |
| 转换器数目： | 1 |
| 电压电源： | 单电源 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SC-74A，SOT-753 |
| 供应商设备封装： | SOT-23-5 |
| 包装： | 标准包装 |
| 输入数目和类型： | 1 个单端，单极 |
| 其它名称： | MCP3021A4T-E/OTDKR |
MCP3021
DS21805A-page 12
2003 Microchip Technology Inc.
3.0
PIN FUNCTIONS
TABLE 3-1:
PIN FUNCTION TABLE
3.1
VDD and VSS
The VDD pin, with respect to VSS, provides power to the
device, as well as a voltage reference for the conver-
sion process. Refer to Section 6.4, “Device Power and
Layout Considerations”, for tips on power and
grounding.
3.2
Analog Input (AIN)
AIN is the input pin to the sample and hold circuitry of
the Successive Approximation Register (SAR) con-
verter. Care should be taken in driving this pin. Refer to
Section 6.1, “Driving the Analog Input”. For proper con-
versions, the voltage on this pin can vary from VSS to
VDD.
3.3
Serial Data (SDA)
This is a bidirectional pin used to transfer addresses
and data into and out of the device. It is an open-drain
terminal, therefore, the SDA bus requires a pull-up
resistor to VDD (typically 10 k for 100 kHz and 2 k
for 400 kHz SCL clock speeds (refer to Section 6.2,
“Connecting to the I2C Bus”).
For normal data transfer, SDA is allowed to change only
during SCL low. Changes during SCL high are reserved
for indicating the START and STOP conditions (refer to
3.4
Serial Clock (SCL)
SCL is an input pin used to synchronize the data trans-
fer to and from the device on the SDA pin and is an
open-drain terminal. Therefore, the SCL bus requires a
pull-up resistor to VDD (typically, 10 k for 100 kHz and
2k
for 400 kHz SCL clock speeds. Refer to
For normal data transfer, SDA is allowed to change
only during SCL low. Changes during SCL high are
reserved for indicating the START and STOP
conditions (refer to Section 6.1, “Driving the Analog
Input”).
Name
Function
VDD
+2.7V to 5.5V Power Supply
VSS
Ground
AIN
Analog Input
SDA
Serial Data In/Out
SCL
Serial Clock In
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